/*
Copyright (C) 1996-1997 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
// r_main.c

#include "quakedef.h"
#include "r_shadow.h"
#include "polygon.h"

// used for dlight push checking and other things
int r_framecount;

mplane_t frustum[5];

matrix4x4_t r_identitymatrix;

renderstats_t renderstats;

// true during envmap command capture
qboolean envmap;

// maximum visible distance (recalculated from world box each frame)
float r_farclip;
// brightness of world lightmaps and related lighting
// (often reduced when world rtlights are enabled)
float r_lightmapintensity;
// whether to draw world lights realtime, dlights realtime, and their shadows
qboolean r_rtworld;
qboolean r_rtworldshadows;
qboolean r_rtdlight;
qboolean r_rtdlightshadows;


// forces all rendering to draw triangle outlines
int r_showtrispass;

// view origin
vec3_t r_vieworigin;
vec3_t r_viewforward;
vec3_t r_viewleft;
vec3_t r_viewright;
vec3_t r_viewup;
int r_view_x;
int r_view_y;
int r_view_z;
int r_view_width;
int r_view_height;
int r_view_depth;
matrix4x4_t r_view_matrix;

//
// screen size info
//
refdef_t r_refdef;

cvar_t r_showtris = {0, "r_showtris", "0"};
cvar_t r_shownormals = {0, "r_shownormals", "0"};
cvar_t r_drawentities = {0, "r_drawentities","1"};
cvar_t r_drawviewmodel = {0, "r_drawviewmodel","1"};
cvar_t r_speeds = {0, "r_speeds","0"};
cvar_t r_fullbright = {0, "r_fullbright","0"};
cvar_t r_wateralpha = {CVAR_SAVE, "r_wateralpha","1"};
cvar_t r_dynamic = {CVAR_SAVE, "r_dynamic","1"};
cvar_t r_fullbrights = {CVAR_SAVE, "r_fullbrights", "1"};
cvar_t r_drawcollisionbrushes = {0, "r_drawcollisionbrushes", "0"};

cvar_t gl_fogenable = {0, "gl_fogenable", "0"};
cvar_t gl_fogdensity = {0, "gl_fogdensity", "0.25"};
cvar_t gl_fogred = {0, "gl_fogred","0.3"};
cvar_t gl_foggreen = {0, "gl_foggreen","0.3"};
cvar_t gl_fogblue = {0, "gl_fogblue","0.3"};
cvar_t gl_fogstart = {0, "gl_fogstart", "0"};
cvar_t gl_fogend = {0, "gl_fogend","0"};

cvar_t r_textureunits = {0, "r_textureunits", "32"};

cvar_t r_lerpsprites = {CVAR_SAVE, "r_lerpsprites", "1"};
cvar_t r_lerpmodels = {CVAR_SAVE, "r_lerpmodels", "1"};
cvar_t r_waterscroll = {CVAR_SAVE, "r_waterscroll", "1"};

cvar_t r_bloom = {CVAR_SAVE, "r_bloom", "0"};
cvar_t r_bloom_intensity = {CVAR_SAVE, "r_bloom_intensity", "1.5"};
cvar_t r_bloom_blur = {CVAR_SAVE, "r_bloom_blur", "4"};
cvar_t r_bloom_resolution = {CVAR_SAVE, "r_bloom_resolution", "320"};
cvar_t r_bloom_power = {CVAR_SAVE, "r_bloom_power", "2"};

cvar_t r_smoothnormals_areaweighting = {0, "r_smoothnormals_areaweighting", "1"};

cvar_t developer_texturelogging = {0, "developer_texturelogging", "0"};

cvar_t gl_lightmaps = {0, "gl_lightmaps", "0"};

cvar_t r_test = {0, "r_test", "0"}; // used for testing renderer code changes, otherwise does nothing

rtexturepool_t *r_main_texturepool;
rtexture_t *r_bloom_texture_screen;
rtexture_t *r_bloom_texture_bloom;
rtexture_t *r_texture_blanknormalmap;
rtexture_t *r_texture_white;
rtexture_t *r_texture_black;
rtexture_t *r_texture_notexture;
rtexture_t *r_texture_whitecube;
rtexture_t *r_texture_normalizationcube;
rtexture_t *r_texture_fogattenuation;
rtexture_t *r_texture_fogintensity;

void R_ModulateColors(float *in, float *out, int verts, float r, float g, float b)
{
	int i;
	for (i = 0;i < verts;i++)
	{
		out[0] = in[0] * r;
		out[1] = in[1] * g;
		out[2] = in[2] * b;
		out[3] = in[3];
		in += 4;
		out += 4;
	}
}

void R_FillColors(float *out, int verts, float r, float g, float b, float a)
{
	int i;
	for (i = 0;i < verts;i++)
	{
		out[0] = r;
		out[1] = g;
		out[2] = b;
		out[3] = a;
		out += 4;
	}
}

vec3_t fogcolor;
vec_t fogdensity;
vec_t fogrange;
vec_t fograngerecip;
int fogtableindex;
vec_t fogtabledistmultiplier;
float fogtable[FOGTABLEWIDTH];
float fog_density, fog_red, fog_green, fog_blue;
qboolean fogenabled;
qboolean oldgl_fogenable;
void R_UpdateFog(void)
{
	if (gamemode == GAME_NEHAHRA)
	{
		if (gl_fogenable.integer)
		{
			oldgl_fogenable = true;
			fog_density = gl_fogdensity.value;
			fog_red = gl_fogred.value;
			fog_green = gl_foggreen.value;
			fog_blue = gl_fogblue.value;
		}
		else if (oldgl_fogenable)
		{
			oldgl_fogenable = false;
			fog_density = 0;
			fog_red = 0;
			fog_green = 0;
			fog_blue = 0;
		}
	}
	if (fog_density)
	{
		fogcolor[0] = fog_red   = bound(0.0f, fog_red  , 1.0f);
		fogcolor[1] = fog_green = bound(0.0f, fog_green, 1.0f);
		fogcolor[2] = fog_blue  = bound(0.0f, fog_blue , 1.0f);
	}
	if (fog_density)
	{
		fogenabled = true;
		fogdensity = -4000.0f / (fog_density * fog_density);
		// this is the point where the fog reaches 0.9986 alpha, which we
		// consider a good enough cutoff point for the texture
		// (0.9986 * 256 == 255.6)
		fogrange = 400 / fog_density;
		fograngerecip = 1.0f / fogrange;
		fogtabledistmultiplier = FOGTABLEWIDTH * fograngerecip;
		// fog color was already set
	}
	else
		fogenabled = false;
}

// FIXME: move this to client?
void FOG_clear(void)
{
	if (gamemode == GAME_NEHAHRA)
	{
		Cvar_Set("gl_fogenable", "0");
		Cvar_Set("gl_fogdensity", "0.2");
		Cvar_Set("gl_fogred", "0.3");
		Cvar_Set("gl_foggreen", "0.3");
		Cvar_Set("gl_fogblue", "0.3");
	}
	fog_density = fog_red = fog_green = fog_blue = 0.0f;
}

// FIXME: move this to client?
void FOG_registercvars(void)
{
	int x;
	double r, alpha;

	if (gamemode == GAME_NEHAHRA)
	{
		Cvar_RegisterVariable (&gl_fogenable);
		Cvar_RegisterVariable (&gl_fogdensity);
		Cvar_RegisterVariable (&gl_fogred);
		Cvar_RegisterVariable (&gl_foggreen);
		Cvar_RegisterVariable (&gl_fogblue);
		Cvar_RegisterVariable (&gl_fogstart);
		Cvar_RegisterVariable (&gl_fogend);
	}

	r = (-1.0/256.0) * (FOGTABLEWIDTH * FOGTABLEWIDTH);
	for (x = 0;x < FOGTABLEWIDTH;x++)
	{
		alpha = exp(r / ((double)x*(double)x));
		if (x == FOGTABLEWIDTH - 1)
			alpha = 1;
		fogtable[x] = bound(0, alpha, 1);
	}
}

static void R_BuildBlankTextures(void)
{
	unsigned char data[4];
	data[0] = 128; // normal X
	data[1] = 128; // normal Y
	data[2] = 255; // normal Z
	data[3] = 128; // height
	r_texture_blanknormalmap = R_LoadTexture2D(r_main_texturepool, "blankbump", 1, 1, data, TEXTYPE_RGBA, TEXF_PRECACHE, NULL);
	data[0] = 255;
	data[1] = 255;
	data[2] = 255;
	data[3] = 255;
	r_texture_white = R_LoadTexture2D(r_main_texturepool, "blankwhite", 1, 1, data, TEXTYPE_RGBA, TEXF_PRECACHE, NULL);
	data[0] = 0;
	data[1] = 0;
	data[2] = 0;
	data[3] = 255;
	r_texture_black = R_LoadTexture2D(r_main_texturepool, "blankblack", 1, 1, data, TEXTYPE_RGBA, TEXF_PRECACHE, NULL);
}

static void R_BuildNoTexture(void)
{
	int x, y;
	unsigned char pix[16][16][4];
	// this makes a light grey/dark grey checkerboard texture
	for (y = 0;y < 16;y++)
	{
		for (x = 0;x < 16;x++)
		{
			if ((y < 8) ^ (x < 8))
			{
				pix[y][x][0] = 128;
				pix[y][x][1] = 128;
				pix[y][x][2] = 128;
				pix[y][x][3] = 255;
			}
			else
			{
				pix[y][x][0] = 64;
				pix[y][x][1] = 64;
				pix[y][x][2] = 64;
				pix[y][x][3] = 255;
			}
		}
	}
	r_texture_notexture = R_LoadTexture2D(r_main_texturepool, "notexture", 16, 16, &pix[0][0][0], TEXTYPE_RGBA, TEXF_MIPMAP, NULL);
}

static void R_BuildWhiteCube(void)
{
	unsigned char data[6*1*1*4];
	data[ 0] = 255;data[ 1] = 255;data[ 2] = 255;data[ 3] = 255;
	data[ 4] = 255;data[ 5] = 255;data[ 6] = 255;data[ 7] = 255;
	data[ 8] = 255;data[ 9] = 255;data[10] = 255;data[11] = 255;
	data[12] = 255;data[13] = 255;data[14] = 255;data[15] = 255;
	data[16] = 255;data[17] = 255;data[18] = 255;data[19] = 255;
	data[20] = 255;data[21] = 255;data[22] = 255;data[23] = 255;
	r_texture_whitecube = R_LoadTextureCubeMap(r_main_texturepool, "whitecube", 1, data, TEXTYPE_RGBA, TEXF_PRECACHE | TEXF_CLAMP, NULL);
}

static void R_BuildNormalizationCube(void)
{
	int x, y, side;
	vec3_t v;
	vec_t s, t, intensity;
#define NORMSIZE 64
	unsigned char data[6][NORMSIZE][NORMSIZE][4];
	for (side = 0;side < 6;side++)
	{
		for (y = 0;y < NORMSIZE;y++)
		{
			for (x = 0;x < NORMSIZE;x++)
			{
				s = (x + 0.5f) * (2.0f / NORMSIZE) - 1.0f;
				t = (y + 0.5f) * (2.0f / NORMSIZE) - 1.0f;
				switch(side)
				{
				default:
				case 0:
					v[0] = 1;
					v[1] = -t;
					v[2] = -s;
					break;
				case 1:
					v[0] = -1;
					v[1] = -t;
					v[2] = s;
					break;
				case 2:
					v[0] = s;
					v[1] = 1;
					v[2] = t;
					break;
				case 3:
					v[0] = s;
					v[1] = -1;
					v[2] = -t;
					break;
				case 4:
					v[0] = s;
					v[1] = -t;
					v[2] = 1;
					break;
				case 5:
					v[0] = -s;
					v[1] = -t;
					v[2] = -1;
					break;
				}
				intensity = 127.0f / sqrt(DotProduct(v, v));
				data[side][y][x][0] = 128.0f + intensity * v[0];
				data[side][y][x][1] = 128.0f + intensity * v[1];
				data[side][y][x][2] = 128.0f + intensity * v[2];
				data[side][y][x][3] = 255;
			}
		}
	}
	r_texture_normalizationcube = R_LoadTextureCubeMap(r_main_texturepool, "normalcube", NORMSIZE, &data[0][0][0][0], TEXTYPE_RGBA, TEXF_PRECACHE | TEXF_CLAMP, NULL);
}

static void R_BuildFogTexture(void)
{
	int x, b;
	double r, alpha;
#define FOGWIDTH 64
	unsigned char data1[FOGWIDTH][4];
	unsigned char data2[FOGWIDTH][4];
	r = (-1.0/256.0) * (FOGWIDTH * FOGWIDTH);
	for (x = 0;x < FOGWIDTH;x++)
	{
		alpha = exp(r / ((double)x*(double)x));
		if (x == FOGWIDTH - 1)
			alpha = 1;
		b = (int)(256.0 * alpha);
		b = bound(0, b, 255);
		data1[x][0] = 255 - b;
		data1[x][1] = 255 - b;
		data1[x][2] = 255 - b;
		data1[x][3] = 255;
		data2[x][0] = b;
		data2[x][1] = b;
		data2[x][2] = b;
		data2[x][3] = 255;
	}
	r_texture_fogattenuation = R_LoadTexture2D(r_main_texturepool, "fogattenuation", FOGWIDTH, 1, &data1[0][0], TEXTYPE_RGBA, TEXF_PRECACHE | TEXF_FORCELINEAR | TEXF_CLAMP, NULL);
	r_texture_fogintensity = R_LoadTexture2D(r_main_texturepool, "fogintensity", FOGWIDTH, 1, &data2[0][0], TEXTYPE_RGBA, TEXF_PRECACHE | TEXF_FORCELINEAR | TEXF_CLAMP, NULL);
}

void gl_main_start(void)
{
	r_main_texturepool = R_AllocTexturePool();
	r_bloom_texture_screen = NULL;
	r_bloom_texture_bloom = NULL;
	R_BuildBlankTextures();
	R_BuildNoTexture();
	if (gl_texturecubemap)
	{
		R_BuildWhiteCube();
		R_BuildNormalizationCube();
	}
	R_BuildFogTexture();
}

void gl_main_shutdown(void)
{
	R_FreeTexturePool(&r_main_texturepool);
	r_bloom_texture_screen = NULL;
	r_bloom_texture_bloom = NULL;
	r_texture_blanknormalmap = NULL;
	r_texture_white = NULL;
	r_texture_black = NULL;
	r_texture_whitecube = NULL;
	r_texture_normalizationcube = NULL;
}

extern void CL_ParseEntityLump(char *entitystring);
void gl_main_newmap(void)
{
	// FIXME: move this code to client
	int l;
	char *entities, entname[MAX_QPATH];
	r_framecount = 1;
	if (cl.worldmodel)
	{
		strlcpy(entname, cl.worldmodel->name, sizeof(entname));
		l = (int)strlen(entname) - 4;
		if (l >= 0 && !strcmp(entname + l, ".bsp"))
		{
			strcpy(entname + l, ".ent");
			if ((entities = (char *)FS_LoadFile(entname, tempmempool, true, NULL)))
			{
				CL_ParseEntityLump(entities);
				Mem_Free(entities);
				return;
			}
		}
		if (cl.worldmodel->brush.entities)
			CL_ParseEntityLump(cl.worldmodel->brush.entities);
	}
}

void GL_Main_Init(void)
{
	Matrix4x4_CreateIdentity(&r_identitymatrix);
// FIXME: move this to client?
	FOG_registercvars();
	Cvar_RegisterVariable(&r_showtris);
	Cvar_RegisterVariable(&r_shownormals);
	Cvar_RegisterVariable(&r_drawentities);
	Cvar_RegisterVariable(&r_drawviewmodel);
	Cvar_RegisterVariable(&r_speeds);
	Cvar_RegisterVariable(&r_fullbrights);
	Cvar_RegisterVariable(&r_wateralpha);
	Cvar_RegisterVariable(&r_dynamic);
	Cvar_RegisterVariable(&r_fullbright);
	Cvar_RegisterVariable(&r_textureunits);
	Cvar_RegisterVariable(&r_lerpsprites);
	Cvar_RegisterVariable(&r_lerpmodels);
	Cvar_RegisterVariable(&r_waterscroll);
	Cvar_RegisterVariable(&r_drawcollisionbrushes);
	Cvar_RegisterVariable(&r_bloom);
	Cvar_RegisterVariable(&r_bloom_intensity);
	Cvar_RegisterVariable(&r_bloom_blur);
	Cvar_RegisterVariable(&r_bloom_resolution);
	Cvar_RegisterVariable(&r_bloom_power);
	Cvar_RegisterVariable(&r_smoothnormals_areaweighting);
	Cvar_RegisterVariable(&developer_texturelogging);
	Cvar_RegisterVariable(&gl_lightmaps);
	Cvar_RegisterVariable(&r_test);
	if (gamemode == GAME_NEHAHRA || gamemode == GAME_NEXUIZ || gamemode == GAME_TENEBRAE)
		Cvar_SetValue("r_fullbrights", 0);
	R_RegisterModule("GL_Main", gl_main_start, gl_main_shutdown, gl_main_newmap);
}

static vec3_t r_farclip_origin;
static vec3_t r_farclip_direction;
static vec_t r_farclip_directiondist;
static vec_t r_farclip_meshfarclip;
static int r_farclip_directionbit0;
static int r_farclip_directionbit1;
static int r_farclip_directionbit2;

// enlarge farclip to accomodate box
static void R_FarClip_Box(vec3_t mins, vec3_t maxs)
{
	float d;
	d = (r_farclip_directionbit0 ? mins[0] : maxs[0]) * r_farclip_direction[0]
	  + (r_farclip_directionbit1 ? mins[1] : maxs[1]) * r_farclip_direction[1]
	  + (r_farclip_directionbit2 ? mins[2] : maxs[2]) * r_farclip_direction[2];
	if (r_farclip_meshfarclip < d)
		r_farclip_meshfarclip = d;
}

// return farclip value
static float R_FarClip(vec3_t origin, vec3_t direction, vec_t startfarclip)
{
	int i;

	VectorCopy(origin, r_farclip_origin);
	VectorCopy(direction, r_farclip_direction);
	r_farclip_directiondist = DotProduct(r_farclip_origin, r_farclip_direction);
	r_farclip_directionbit0 = r_farclip_direction[0] < 0;
	r_farclip_directionbit1 = r_farclip_direction[1] < 0;
	r_farclip_directionbit2 = r_farclip_direction[2] < 0;
	r_farclip_meshfarclip = r_farclip_directiondist + startfarclip;

	if (r_refdef.worldmodel)
		R_FarClip_Box(r_refdef.worldmodel->normalmins, r_refdef.worldmodel->normalmaxs);
	for (i = 0;i < r_refdef.numentities;i++)
		R_FarClip_Box(r_refdef.entities[i]->mins, r_refdef.entities[i]->maxs);

	return r_farclip_meshfarclip - r_farclip_directiondist;
}

extern void R_Textures_Init(void);
extern void GL_Draw_Init(void);
extern void GL_Main_Init(void);
extern void R_Shadow_Init(void);
extern void R_Sky_Init(void);
extern void GL_Surf_Init(void);
extern void R_Crosshairs_Init(void);
extern void R_Light_Init(void);
extern void R_Particles_Init(void);
extern void R_Explosion_Init(void);
extern void gl_backend_init(void);
extern void Sbar_Init(void);
extern void R_LightningBeams_Init(void);
extern void Mod_RenderInit(void);

void Render_Init(void)
{
	gl_backend_init();
	R_Textures_Init();
	R_MeshQueue_Init();
	GL_Main_Init();
	GL_Draw_Init();
	R_Shadow_Init();
	R_Sky_Init();
	GL_Surf_Init();
	R_Crosshairs_Init();
	R_Light_Init();
	R_Particles_Init();
	R_Explosion_Init();
	UI_Init();
	Sbar_Init();
	R_LightningBeams_Init();
	Mod_RenderInit();
}

/*
===============
GL_Init
===============
*/
extern char *ENGINE_EXTENSIONS;
void GL_Init (void)
{
	VID_CheckExtensions();

	// LordHavoc: report supported extensions
	Con_DPrintf("\nengine extensions: %s\n", vm_sv_extensions );

	// clear to black (loading plaque will be seen over this)
	qglClearColor(0,0,0,1);
	qglClear(GL_COLOR_BUFFER_BIT);
}

int R_CullBox(const vec3_t mins, const vec3_t maxs)
{
	int i;
	mplane_t *p;
	for (i = 0;i < 4;i++)
	{
		p = frustum + i;
		switch(p->signbits)
		{
		default:
		case 0:
			if (p->normal[0]*maxs[0] + p->normal[1]*maxs[1] + p->normal[2]*maxs[2] < p->dist)
				return true;
			break;
		case 1:
			if (p->normal[0]*mins[0] + p->normal[1]*maxs[1] + p->normal[2]*maxs[2] < p->dist)
				return true;
			break;
		case 2:
			if (p->normal[0]*maxs[0] + p->normal[1]*mins[1] + p->normal[2]*maxs[2] < p->dist)
				return true;
			break;
		case 3:
			if (p->normal[0]*mins[0] + p->normal[1]*mins[1] + p->normal[2]*maxs[2] < p->dist)
				return true;
			break;
		case 4:
			if (p->normal[0]*maxs[0] + p->normal[1]*maxs[1] + p->normal[2]*mins[2] < p->dist)
				return true;
			break;
		case 5:
			if (p->normal[0]*mins[0] + p->normal[1]*maxs[1] + p->normal[2]*mins[2] < p->dist)
				return true;
			break;
		case 6:
			if (p->normal[0]*maxs[0] + p->normal[1]*mins[1] + p->normal[2]*mins[2] < p->dist)
				return true;
			break;
		case 7:
			if (p->normal[0]*mins[0] + p->normal[1]*mins[1] + p->normal[2]*mins[2] < p->dist)
				return true;
			break;
		}
	}
	return false;
}

//==================================================================================

static void R_MarkEntities (void)
{
	int i, renderimask;
	entity_render_t *ent;

	if (!r_drawentities.integer)
		return;

	r_refdef.worldentity->visframe = r_framecount;
	renderimask = envmap ? (RENDER_EXTERIORMODEL | RENDER_VIEWMODEL) : (chase_active.integer ? 0 : RENDER_EXTERIORMODEL);
	if (r_refdef.worldmodel && r_refdef.worldmodel->brush.BoxTouchingVisibleLeafs)
	{
		// worldmodel can check visibility
		for (i = 0;i < r_refdef.numentities;i++)
		{
			ent = r_refdef.entities[i];
			// some of the renderer still relies on origin...
			Matrix4x4_OriginFromMatrix(&ent->matrix, ent->origin);
			// some of the renderer still relies on scale...
			ent->scale = Matrix4x4_ScaleFromMatrix(&ent->matrix);
			if (!(ent->flags & renderimask) && !R_CullBox(ent->mins, ent->maxs) && ((ent->effects & EF_NODEPTHTEST) || r_refdef.worldmodel->brush.BoxTouchingVisibleLeafs(r_refdef.worldmodel, r_worldleafvisible, ent->mins, ent->maxs)))
			{
				R_UpdateEntLights(ent);
				ent->visframe = r_framecount;
			}
		}
	}
	else
	{
		// no worldmodel or it can't check visibility
		for (i = 0;i < r_refdef.numentities;i++)
		{
			ent = r_refdef.entities[i];
			// some of the renderer still relies on origin...
			Matrix4x4_OriginFromMatrix(&ent->matrix, ent->origin);
			// some of the renderer still relies on scale...
			ent->scale = Matrix4x4_ScaleFromMatrix(&ent->matrix);
			if (!(ent->flags & renderimask) && !R_CullBox(ent->mins, ent->maxs) && (ent->effects & EF_NODEPTHTEST))
			{
				R_UpdateEntLights(ent);
				ent->visframe = r_framecount;
			}
		}
	}
}

// only used if skyrendermasked, and normally returns false
int R_DrawBrushModelsSky (void)
{
	int i, sky;
	entity_render_t *ent;

	if (!r_drawentities.integer)
		return false;

	sky = false;
	for (i = 0;i < r_refdef.numentities;i++)
	{
		ent = r_refdef.entities[i];
		if (ent->visframe == r_framecount && ent->model && ent->model->DrawSky)
		{
			ent->model->DrawSky(ent);
			sky = true;
		}
	}
	return sky;
}

void R_DrawNoModel(entity_render_t *ent);
void R_DrawModels(void)
{
	int i;
	entity_render_t *ent;

	if (!r_drawentities.integer)
		return;

	for (i = 0;i < r_refdef.numentities;i++)
	{
		ent = r_refdef.entities[i];
		if (ent->visframe == r_framecount)
		{
			renderstats.entities++;
			if (ent->model && ent->model->Draw != NULL)
				ent->model->Draw(ent);
			else
				R_DrawNoModel(ent);
		}
	}
}

static void R_SetFrustum(void)
{
	// break apart the view matrix into vectors for various purposes
	Matrix4x4_ToVectors(&r_view_matrix, r_viewforward, r_viewleft, r_viewup, r_vieworigin);
	VectorNegate(r_viewleft, r_viewright);

#if 0
	frustum[0].normal[0] = 0 - 1.0 / r_refdef.frustum_x;
	frustum[0].normal[1] = 0 - 0;
	frustum[0].normal[2] = -1 - 0;
	frustum[1].normal[0] = 0 + 1.0 / r_refdef.frustum_x;
	frustum[1].normal[1] = 0 + 0;
	frustum[1].normal[2] = -1 + 0;
	frustum[2].normal[0] = 0 - 0;
	frustum[2].normal[1] = 0 - 1.0 / r_refdef.frustum_y;
	frustum[2].normal[2] = -1 - 0;
	frustum[3].normal[0] = 0 + 0;
	frustum[3].normal[1] = 0 + 1.0 / r_refdef.frustum_y;
	frustum[3].normal[2] = -1 + 0;
#endif

#if 0
	zNear = 1.0;
	nudge = 1.0 - 1.0 / (1<<23);
	frustum[4].normal[0] = 0 - 0;
	frustum[4].normal[1] = 0 - 0;
	frustum[4].normal[2] = -1 - -nudge;
	frustum[4].dist = 0 - -2 * zNear * nudge;
	frustum[5].normal[0] = 0 + 0;
	frustum[5].normal[1] = 0 + 0;
	frustum[5].normal[2] = -1 + -nudge;
	frustum[5].dist = 0 + -2 * zNear * nudge;
#endif



#if 0
	frustum[0].normal[0] = m[3] - m[0];
	frustum[0].normal[1] = m[7] - m[4];
	frustum[0].normal[2] = m[11] - m[8];
	frustum[0].dist = m[15] - m[12];

	frustum[1].normal[0] = m[3] + m[0];
	frustum[1].normal[1] = m[7] + m[4];
	frustum[1].normal[2] = m[11] + m[8];
	frustum[1].dist = m[15] + m[12];

	frustum[2].normal[0] = m[3] - m[1];
	frustum[2].normal[1] = m[7] - m[5];
	frustum[2].normal[2] = m[11] - m[9];
	frustum[2].dist = m[15] - m[13];

	frustum[3].normal[0] = m[3] + m[1];
	frustum[3].normal[1] = m[7] + m[5];
	frustum[3].normal[2] = m[11] + m[9];
	frustum[3].dist = m[15] + m[13];

	frustum[4].normal[0] = m[3] - m[2];
	frustum[4].normal[1] = m[7] - m[6];
	frustum[4].normal[2] = m[11] - m[10];
	frustum[4].dist = m[15] - m[14];

	frustum[5].normal[0] = m[3] + m[2];
	frustum[5].normal[1] = m[7] + m[6];
	frustum[5].normal[2] = m[11] + m[10];
	frustum[5].dist = m[15] + m[14];
#endif



	VectorMAM(1, r_viewforward, 1.0 / -r_refdef.frustum_x, r_viewleft, frustum[0].normal);
	VectorMAM(1, r_viewforward, 1.0 /  r_refdef.frustum_x, r_viewleft, frustum[1].normal);
	VectorMAM(1, r_viewforward, 1.0 / -r_refdef.frustum_y, r_viewup, frustum[2].normal);
	VectorMAM(1, r_viewforward, 1.0 /  r_refdef.frustum_y, r_viewup, frustum[3].normal);
	VectorCopy(r_viewforward, frustum[4].normal);
	VectorNormalize(frustum[0].normal);
	VectorNormalize(frustum[1].normal);
	VectorNormalize(frustum[2].normal);
	VectorNormalize(frustum[3].normal);
	frustum[0].dist = DotProduct (r_vieworigin, frustum[0].normal);
	frustum[1].dist = DotProduct (r_vieworigin, frustum[1].normal);
	frustum[2].dist = DotProduct (r_vieworigin, frustum[2].normal);
	frustum[3].dist = DotProduct (r_vieworigin, frustum[3].normal);
	frustum[4].dist = DotProduct (r_vieworigin, frustum[4].normal) + 1.0f;
	PlaneClassify(&frustum[0]);
	PlaneClassify(&frustum[1]);
	PlaneClassify(&frustum[2]);
	PlaneClassify(&frustum[3]);
	PlaneClassify(&frustum[4]);

	// LordHavoc: note to all quake engine coders, Quake had a special case
	// for 90 degrees which assumed a square view (wrong), so I removed it,
	// Quake2 has it disabled as well.

	// rotate R_VIEWFORWARD right by FOV_X/2 degrees
	//RotatePointAroundVector( frustum[0].normal, r_viewup, r_viewforward, -(90 - r_refdef.fov_x / 2));
	//frustum[0].dist = DotProduct (r_vieworigin, frustum[0].normal);
	//PlaneClassify(&frustum[0]);

	// rotate R_VIEWFORWARD left by FOV_X/2 degrees
	//RotatePointAroundVector( frustum[1].normal, r_viewup, r_viewforward, (90 - r_refdef.fov_x / 2));
	//frustum[1].dist = DotProduct (r_vieworigin, frustum[1].normal);
	//PlaneClassify(&frustum[1]);

	// rotate R_VIEWFORWARD up by FOV_X/2 degrees
	//RotatePointAroundVector( frustum[2].normal, r_viewleft, r_viewforward, -(90 - r_refdef.fov_y / 2));
	//frustum[2].dist = DotProduct (r_vieworigin, frustum[2].normal);
	//PlaneClassify(&frustum[2]);

	// rotate R_VIEWFORWARD down by FOV_X/2 degrees
	//RotatePointAroundVector( frustum[3].normal, r_viewleft, r_viewforward, (90 - r_refdef.fov_y / 2));
	//frustum[3].dist = DotProduct (r_vieworigin, frustum[3].normal);
	//PlaneClassify(&frustum[3]);

	// nearclip plane
	//VectorCopy(r_viewforward, frustum[4].normal);
	//frustum[4].dist = DotProduct (r_vieworigin, frustum[4].normal) + 1.0f;
	//PlaneClassify(&frustum[4]);
}

static void R_BlendView(void)
{
	int screenwidth, screenheight;
	qboolean dobloom;
	qboolean doblend;
	rmeshstate_t m;

	// set the (poorly named) screenwidth and screenheight variables to
	// a power of 2 at least as large as the screen, these will define the
	// size of the texture to allocate
	for (screenwidth = 1;screenwidth < vid.width;screenwidth *= 2);
	for (screenheight = 1;screenheight < vid.height;screenheight *= 2);

	doblend = r_refdef.viewblend[3] >= 0.01f;
	dobloom = r_bloom.integer && screenwidth <= gl_max_texture_size && screenheight <= gl_max_texture_size && r_bloom_resolution.value >= 32 && r_bloom_power.integer >= 1 && r_bloom_power.integer < 100 && r_bloom_blur.value >= 0 && r_bloom_blur.value < 512;

	if (!dobloom && !doblend)
		return;

	GL_SetupView_Mode_Ortho(0, 0, 1, 1, -10, 100);
	GL_DepthMask(true);
	GL_DepthTest(false);
	R_Mesh_Matrix(&r_identitymatrix);
	// vertex coordinates for a quad that covers the screen exactly
	varray_vertex3f[0] = 0;varray_vertex3f[1] = 0;varray_vertex3f[2] = 0;
	varray_vertex3f[3] = 1;varray_vertex3f[4] = 0;varray_vertex3f[5] = 0;
	varray_vertex3f[6] = 1;varray_vertex3f[7] = 1;varray_vertex3f[8] = 0;
	varray_vertex3f[9] = 0;varray_vertex3f[10] = 1;varray_vertex3f[11] = 0;
	if (dobloom)
	{
		int bloomwidth, bloomheight, x, dobloomblend, range;
		float xoffset, yoffset, r;
		renderstats.bloom++;
		// allocate textures as needed
		if (!r_bloom_texture_screen)
			r_bloom_texture_screen = R_LoadTexture2D(r_main_texturepool, "screen", screenwidth, screenheight, NULL, TEXTYPE_RGBA, TEXF_FORCENEAREST | TEXF_CLAMP | TEXF_ALWAYSPRECACHE, NULL);
		if (!r_bloom_texture_bloom)
			r_bloom_texture_bloom = R_LoadTexture2D(r_main_texturepool, "bloom", screenwidth, screenheight, NULL, TEXTYPE_RGBA, TEXF_FORCELINEAR | TEXF_CLAMP | TEXF_ALWAYSPRECACHE, NULL);
		// set bloomwidth and bloomheight to the bloom resolution that will be
		// used (often less than the screen resolution for faster rendering)
		bloomwidth = min(r_view_width, r_bloom_resolution.integer);
		bloomheight = min(r_view_height, bloomwidth * r_view_height / r_view_width);
		// set up a texcoord array for the full resolution screen image
		// (we have to keep this around to copy back during final render)
		varray_texcoord2f[0][0] = 0;
		varray_texcoord2f[0][1] = (float)r_view_height / (float)screenheight;
		varray_texcoord2f[0][2] = (float)r_view_width / (float)screenwidth;
		varray_texcoord2f[0][3] = (float)r_view_height / (float)screenheight;
		varray_texcoord2f[0][4] = (float)r_view_width / (float)screenwidth;
		varray_texcoord2f[0][5] = 0;
		varray_texcoord2f[0][6] = 0;
		varray_texcoord2f[0][7] = 0;
		// set up a texcoord array for the reduced resolution bloom image
		// (which will be additive blended over the screen image)
		varray_texcoord2f[1][0] = 0;
		varray_texcoord2f[1][1] = (float)bloomheight / (float)screenheight;
		varray_texcoord2f[1][2] = (float)bloomwidth / (float)screenwidth;
		varray_texcoord2f[1][3] = (float)bloomheight / (float)screenheight;
		varray_texcoord2f[1][4] = (float)bloomwidth / (float)screenwidth;
		varray_texcoord2f[1][5] = 0;
		varray_texcoord2f[1][6] = 0;
		varray_texcoord2f[1][7] = 0;
		memset(&m, 0, sizeof(m));
		m.pointer_vertex = varray_vertex3f;
		m.pointer_texcoord[0] = varray_texcoord2f[0];
		m.tex[0] = R_GetTexture(r_bloom_texture_screen);
		R_Mesh_State(&m);
		// copy view into the full resolution screen image texture
		GL_ActiveTexture(0);
		qglCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, r_view_x, vid.height - (r_view_y + r_view_height), r_view_width, r_view_height);
		renderstats.bloom_copypixels += r_view_width * r_view_height;
		// now scale it down to the bloom size and raise to a power of itself
		// to darken it (this leaves the really bright stuff bright, and
		// everything else becomes very dark)
		// TODO: optimize with multitexture or GLSL
		qglViewport(r_view_x, vid.height - (r_view_y + bloomheight), bloomwidth, bloomheight);
		GL_BlendFunc(GL_ONE, GL_ZERO);
		GL_Color(1, 1, 1, 1);
		R_Mesh_Draw(0, 4, 2, polygonelements);
		renderstats.bloom_drawpixels += bloomwidth * bloomheight;
		// render multiple times with a multiply blendfunc to raise to a power
		GL_BlendFunc(GL_DST_COLOR, GL_ZERO);
		for (x = 1;x < r_bloom_power.integer;x++)
		{
			R_Mesh_Draw(0, 4, 2, polygonelements);
			renderstats.bloom_drawpixels += bloomwidth * bloomheight;
		}
		// we now have a darkened bloom image in the framebuffer, copy it into
		// the bloom image texture for more processing
		memset(&m, 0, sizeof(m));
		m.pointer_vertex = varray_vertex3f;
		m.tex[0] = R_GetTexture(r_bloom_texture_bloom);
		m.pointer_texcoord[0] = varray_texcoord2f[2];
		R_Mesh_State(&m);
		GL_ActiveTexture(0);
		qglCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, r_view_x, vid.height - (r_view_y + bloomheight), bloomwidth, bloomheight);
		renderstats.bloom_copypixels += bloomwidth * bloomheight;
		// blend on at multiple vertical offsets to achieve a vertical blur
		// TODO: do offset blends using GLSL
		range = r_bloom_blur.integer * bloomwidth / 320;
		GL_BlendFunc(GL_ONE, GL_ZERO);
		for (x = -range;x <= range;x++)
		{
			xoffset = 0 / (float)bloomwidth * (float)bloomwidth / (float)screenwidth;
			yoffset = x / (float)bloomheight * (float)bloomheight / (float)screenheight;
			// compute a texcoord array with the specified x and y offset
			varray_texcoord2f[2][0] = xoffset+0;
			varray_texcoord2f[2][1] = yoffset+(float)bloomheight / (float)screenheight;
			varray_texcoord2f[2][2] = xoffset+(float)bloomwidth / (float)screenwidth;
			varray_texcoord2f[2][3] = yoffset+(float)bloomheight / (float)screenheight;
			varray_texcoord2f[2][4] = xoffset+(float)bloomwidth / (float)screenwidth;
			varray_texcoord2f[2][5] = yoffset+0;
			varray_texcoord2f[2][6] = xoffset+0;
			varray_texcoord2f[2][7] = yoffset+0;
			// this r value looks like a 'dot' particle, fading sharply to
			// black at the edges
			// (probably not realistic but looks good enough)
			r = r_bloom_intensity.value/(range*2+1)*(1 - x*x/(float)(range*range));
			if (r < 0.01f)
				continue;
			GL_Color(r, r, r, 1);
			R_Mesh_Draw(0, 4, 2, polygonelements);
			renderstats.bloom_drawpixels += bloomwidth * bloomheight;
			GL_BlendFunc(GL_ONE, GL_ONE);
		}
		// copy the vertically blurred bloom view to a texture
		GL_ActiveTexture(0);
		qglCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, r_view_x, vid.height - (r_view_y + bloomheight), bloomwidth, bloomheight);
		renderstats.bloom_copypixels += bloomwidth * bloomheight;
		// blend the vertically blurred image at multiple offsets horizontally
		// to finish the blur effect
		// TODO: do offset blends using GLSL
		range = r_bloom_blur.integer * bloomwidth / 320;
		GL_BlendFunc(GL_ONE, GL_ZERO);
		for (x = -range;x <= range;x++)
		{
			xoffset = x / (float)bloomwidth * (float)bloomwidth / (float)screenwidth;
			yoffset = 0 / (float)bloomheight * (float)bloomheight / (float)screenheight;
			// compute a texcoord array with the specified x and y offset
			varray_texcoord2f[2][0] = xoffset+0;
			varray_texcoord2f[2][1] = yoffset+(float)bloomheight / (float)screenheight;
			varray_texcoord2f[2][2] = xoffset+(float)bloomwidth / (float)screenwidth;
			varray_texcoord2f[2][3] = yoffset+(float)bloomheight / (float)screenheight;
			varray_texcoord2f[2][4] = xoffset+(float)bloomwidth / (float)screenwidth;
			varray_texcoord2f[2][5] = yoffset+0;
			varray_texcoord2f[2][6] = xoffset+0;
			varray_texcoord2f[2][7] = yoffset+0;
			// this r value looks like a 'dot' particle, fading sharply to
			// black at the edges
			// (probably not realistic but looks good enough)
			r = r_bloom_intensity.value/(range*2+1)*(1 - x*x/(float)(range*range));
			if (r < 0.01f)
				continue;
			GL_Color(r, r, r, 1);
			R_Mesh_Draw(0, 4, 2, polygonelements);
			renderstats.bloom_drawpixels += bloomwidth * bloomheight;
			GL_BlendFunc(GL_ONE, GL_ONE);
		}
		// copy the blurred bloom view to a texture
		GL_ActiveTexture(0);
		qglCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, r_view_x, vid.height - (r_view_y + bloomheight), bloomwidth, bloomheight);
		renderstats.bloom_copypixels += bloomwidth * bloomheight;
		// go back to full view area
		qglViewport(r_view_x, vid.height - (r_view_y + r_view_height), r_view_width, r_view_height);
		// put the original screen image back in place and blend the bloom
		// texture on it
		memset(&m, 0, sizeof(m));
		m.pointer_vertex = varray_vertex3f;
		m.tex[0] = R_GetTexture(r_bloom_texture_screen);
		m.pointer_texcoord[0] = varray_texcoord2f[0];
#if 0
		dobloomblend = false;
#else
		// do both in one pass if possible
		if (r_textureunits.integer >= 2 && gl_combine.integer)
		{
			dobloomblend = false;
			m.texcombinergb[1] = GL_ADD;
			m.tex[1] = R_GetTexture(r_bloom_texture_bloom);
			m.pointer_texcoord[1] = varray_texcoord2f[1];
		}
		else
			dobloomblend = true;
#endif
		R_Mesh_State(&m);
		GL_BlendFunc(GL_ONE, GL_ZERO);
		GL_Color(1,1,1,1);
		R_Mesh_Draw(0, 4, 2, polygonelements);
		renderstats.bloom_drawpixels += r_view_width * r_view_height;
		// now blend on the bloom texture if multipass
		if (dobloomblend)
		{
			memset(&m, 0, sizeof(m));
			m.pointer_vertex = varray_vertex3f;
			m.tex[0] = R_GetTexture(r_bloom_texture_bloom);
			m.pointer_texcoord[0] = varray_texcoord2f[1];
			R_Mesh_State(&m);
			GL_BlendFunc(GL_ONE, GL_ONE);
			GL_Color(1,1,1,1);
			R_Mesh_Draw(0, 4, 2, polygonelements);
			renderstats.bloom_drawpixels += r_view_width * r_view_height;
		}
	}
	if (doblend)
	{
		// apply a color tint to the whole view
		memset(&m, 0, sizeof(m));
		m.pointer_vertex = varray_vertex3f;
		R_Mesh_State(&m);
		GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
		GL_Color(r_refdef.viewblend[0], r_refdef.viewblend[1], r_refdef.viewblend[2], r_refdef.viewblend[3]);
		R_Mesh_Draw(0, 4, 2, polygonelements);
	}
}

void R_RenderScene(void);

matrix4x4_t r_waterscrollmatrix;

/*
================
R_RenderView
================
*/
void R_RenderView(void)
{
	if (!r_refdef.entities/* || !r_refdef.worldmodel*/)
		return; //Host_Error ("R_RenderView: NULL worldmodel");

	r_view_width = bound(0, r_refdef.width, vid.width);
	r_view_height = bound(0, r_refdef.height, vid.height);
	r_view_depth = 1;
	r_view_x = bound(0, r_refdef.x, vid.width - r_refdef.width);
	r_view_y = bound(0, r_refdef.y, vid.height - r_refdef.height);
	r_view_z = 0;
	r_view_matrix = r_refdef.viewentitymatrix;
	GL_ColorMask(r_refdef.colormask[0], r_refdef.colormask[1], r_refdef.colormask[2], 1);
	r_rtworld = r_shadow_realtime_world.integer;
	r_rtworldshadows = r_shadow_realtime_world_shadows.integer && gl_stencil;
	r_rtdlight = (r_shadow_realtime_world.integer || r_shadow_realtime_dlight.integer) && !gl_flashblend.integer;
	r_rtdlightshadows = r_rtdlight && (r_rtworld ? r_shadow_realtime_world_dlightshadows.integer : r_shadow_realtime_dlight_shadows.integer) && gl_stencil;
	r_lightmapintensity = r_rtworld ? r_shadow_realtime_world_lightmaps.value : 1;

	// GL is weird because it's bottom to top, r_view_y is top to bottom
	qglViewport(r_view_x, vid.height - (r_view_y + r_view_height), r_view_width, r_view_height);
	GL_Scissor(r_view_x, r_view_y, r_view_width, r_view_height);
	GL_ScissorTest(true);
	GL_DepthMask(true);
	R_ClearScreen();
	R_Textures_Frame();
	R_UpdateFog();
	R_TimeReport("setup");

	qglDepthFunc(GL_LEQUAL);
	qglPolygonOffset(0, 0);
	qglEnable(GL_POLYGON_OFFSET_FILL);

	R_RenderScene();

	qglPolygonOffset(0, 0);
	qglDisable(GL_POLYGON_OFFSET_FILL);

	R_BlendView();
	R_TimeReport("blendview");

	GL_Scissor(0, 0, vid.width, vid.height);
	GL_ScissorTest(false);
}

extern void R_DrawLightningBeams (void);
void R_RenderScene(void)
{
	// don't let sound skip if going slow
	if (r_refdef.extraupdate)
		S_ExtraUpdate ();

	r_framecount++;

	R_MeshQueue_BeginScene();

	GL_ShowTrisColor(0.05, 0.05, 0.05, 1);

	R_SetFrustum();

	r_farclip = R_FarClip(r_vieworigin, r_viewforward, 768.0f) + 256.0f;
	if (r_rtworldshadows || r_rtdlightshadows)
		GL_SetupView_Mode_PerspectiveInfiniteFarClip(r_refdef.frustum_x, r_refdef.frustum_y, 1.0f);
	else
		GL_SetupView_Mode_Perspective(r_refdef.frustum_x, r_refdef.frustum_y, 1.0f, r_farclip);

	GL_SetupView_Orientation_FromEntity(&r_view_matrix);

	Matrix4x4_CreateTranslate(&r_waterscrollmatrix, sin(r_refdef.time) * 0.025 * r_waterscroll.value, sin(r_refdef.time * 0.8f) * 0.025 * r_waterscroll.value, 0);

	R_SkyStartFrame();

	R_WorldVisibility();
	R_TimeReport("worldvis");

	R_MarkEntities();
	R_TimeReport("markentity");

	R_Shadow_UpdateWorldLightSelection();

	// don't let sound skip if going slow
	if (r_refdef.extraupdate)
		S_ExtraUpdate ();

	GL_ShowTrisColor(0.025, 0.025, 0, 1);
	if (r_refdef.worldmodel && r_refdef.worldmodel->DrawSky)
	{
		r_refdef.worldmodel->DrawSky(r_refdef.worldentity);
		R_TimeReport("worldsky");
	}

	if (R_DrawBrushModelsSky())
		R_TimeReport("bmodelsky");

	GL_ShowTrisColor(0.05, 0.05, 0.05, 1);
	if (r_refdef.worldmodel && r_refdef.worldmodel->Draw)
	{
		r_refdef.worldmodel->Draw(r_refdef.worldentity);
		R_TimeReport("world");
	}

	// don't let sound skip if going slow
	if (r_refdef.extraupdate)
		S_ExtraUpdate ();

	GL_ShowTrisColor(0, 0.015, 0, 1);

	R_DrawModels();
	R_TimeReport("models");

	// don't let sound skip if going slow
	if (r_refdef.extraupdate)
		S_ExtraUpdate ();

	GL_ShowTrisColor(0, 0, 0.033, 1);
	R_ShadowVolumeLighting(false);
	R_TimeReport("rtlights");

	// don't let sound skip if going slow
	if (r_refdef.extraupdate)
		S_ExtraUpdate ();

	GL_ShowTrisColor(0.1, 0, 0, 1);

	R_DrawLightningBeams();
	R_TimeReport("lightning");

	R_DrawParticles();
	R_TimeReport("particles");

	R_DrawExplosions();
	R_TimeReport("explosions");

	R_MeshQueue_RenderTransparent();
	R_TimeReport("drawtrans");

	R_DrawCoronas();
	R_TimeReport("coronas");

	R_DrawWorldCrosshair();
	R_TimeReport("crosshair");

	R_MeshQueue_Render();
	R_MeshQueue_EndScene();

	if ((r_shadow_visiblelighting.integer || r_shadow_visiblevolumes.integer) && !r_showtrispass)
	{
		R_ShadowVolumeLighting(true);
		R_TimeReport("visiblevolume");
	}

	GL_ShowTrisColor(0.05, 0.05, 0.05, 1);

	// don't let sound skip if going slow
	if (r_refdef.extraupdate)
		S_ExtraUpdate ();
}

/*
void R_DrawBBoxMesh(vec3_t mins, vec3_t maxs, float cr, float cg, float cb, float ca)
{
	int i;
	float *v, *c, f1, f2, diff[3], vertex3f[8*3], color4f[8*4];
	rmeshstate_t m;
	GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	GL_DepthMask(false);
	GL_DepthTest(true);
	R_Mesh_Matrix(&r_identitymatrix);

	vertex3f[ 0] = mins[0];vertex3f[ 1] = mins[1];vertex3f[ 2] = mins[2];
	vertex3f[ 3] = maxs[0];vertex3f[ 4] = mins[1];vertex3f[ 5] = mins[2];
	vertex3f[ 6] = mins[0];vertex3f[ 7] = maxs[1];vertex3f[ 8] = mins[2];
	vertex3f[ 9] = maxs[0];vertex3f[10] = maxs[1];vertex3f[11] = mins[2];
	vertex3f[12] = mins[0];vertex3f[13] = mins[1];vertex3f[14] = maxs[2];
	vertex3f[15] = maxs[0];vertex3f[16] = mins[1];vertex3f[17] = maxs[2];
	vertex3f[18] = mins[0];vertex3f[19] = maxs[1];vertex3f[20] = maxs[2];
	vertex3f[21] = maxs[0];vertex3f[22] = maxs[1];vertex3f[23] = maxs[2];
	R_FillColors(color, 8, cr, cg, cb, ca);
	if (fogenabled)
	{
		for (i = 0, v = vertex, c = color;i < 8;i++, v += 4, c += 4)
		{
			f2 = VERTEXFOGTABLE(VectorDistance(v, r_vieworigin));
			f1 = 1 - f2;
			c[0] = c[0] * f1 + fogcolor[0] * f2;
			c[1] = c[1] * f1 + fogcolor[1] * f2;
			c[2] = c[2] * f1 + fogcolor[2] * f2;
		}
	}
	memset(&m, 0, sizeof(m));
	m.pointer_vertex = vertex3f;
	m.pointer_color = color;
	R_Mesh_State(&m);
	R_Mesh_Draw(8, 12);
}
*/

int nomodelelements[24] =
{
	5, 2, 0,
	5, 1, 2,
	5, 0, 3,
	5, 3, 1,
	0, 2, 4,
	2, 1, 4,
	3, 0, 4,
	1, 3, 4
};

float nomodelvertex3f[6*3] =
{
	-16,   0,   0,
	 16,   0,   0,
	  0, -16,   0,
	  0,  16,   0,
	  0,   0, -16,
	  0,   0,  16
};

float nomodelcolor4f[6*4] =
{
	0.0f, 0.0f, 0.5f, 1.0f,
	0.0f, 0.0f, 0.5f, 1.0f,
	0.0f, 0.5f, 0.0f, 1.0f,
	0.0f, 0.5f, 0.0f, 1.0f,
	0.5f, 0.0f, 0.0f, 1.0f,
	0.5f, 0.0f, 0.0f, 1.0f
};

void R_DrawNoModel_TransparentCallback(const entity_render_t *ent, int surfacenumber, const rtlight_t *rtlight)
{
	int i;
	float f1, f2, *c;
	float color4f[6*4];
	rmeshstate_t m;
	R_Mesh_Matrix(&ent->matrix);

	memset(&m, 0, sizeof(m));
	m.pointer_vertex = nomodelvertex3f;

	if (ent->flags & EF_ADDITIVE)
	{
		GL_BlendFunc(GL_SRC_ALPHA, GL_ONE);
		GL_DepthMask(false);
	}
	else if (ent->alpha < 1)
	{
		GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
		GL_DepthMask(false);
	}
	else
	{
		GL_BlendFunc(GL_ONE, GL_ZERO);
		GL_DepthMask(true);
	}
	GL_DepthTest(!(ent->effects & EF_NODEPTHTEST));
	if (fogenabled)
	{
		memcpy(color4f, nomodelcolor4f, sizeof(float[6*4]));
		m.pointer_color = color4f;
		f2 = VERTEXFOGTABLE(VectorDistance(ent->origin, r_vieworigin));
		f1 = 1 - f2;
		for (i = 0, c = color4f;i < 6;i++, c += 4)
		{
			c[0] = (c[0] * f1 + fogcolor[0] * f2);
			c[1] = (c[1] * f1 + fogcolor[1] * f2);
			c[2] = (c[2] * f1 + fogcolor[2] * f2);
			c[3] *= ent->alpha;
		}
	}
	else if (ent->alpha != 1)
	{
		memcpy(color4f, nomodelcolor4f, sizeof(float[6*4]));
		m.pointer_color = color4f;
		for (i = 0, c = color4f;i < 6;i++, c += 4)
			c[3] *= ent->alpha;
	}
	else
		m.pointer_color = nomodelcolor4f;
	R_Mesh_State(&m);
	R_Mesh_Draw(0, 6, 8, nomodelelements);
}

void R_DrawNoModel(entity_render_t *ent)
{
	//if ((ent->effects & EF_ADDITIVE) || (ent->alpha < 1))
		R_MeshQueue_AddTransparent(ent->effects & EF_NODEPTHTEST ? r_vieworigin : ent->origin, R_DrawNoModel_TransparentCallback, ent, 0, r_shadow_rtlight);
	//else
	//	R_DrawNoModelCallback(ent, 0);
}

void R_CalcBeam_Vertex3f (float *vert, const vec3_t org1, const vec3_t org2, float width)
{
	vec3_t right1, right2, diff, normal;

	VectorSubtract (org2, org1, normal);

	// calculate 'right' vector for start
	VectorSubtract (r_vieworigin, org1, diff);
	CrossProduct (normal, diff, right1);
	VectorNormalize (right1);

	// calculate 'right' vector for end
	VectorSubtract (r_vieworigin, org2, diff);
	CrossProduct (normal, diff, right2);
	VectorNormalize (right2);

	vert[ 0] = org1[0] + width * right1[0];
	vert[ 1] = org1[1] + width * right1[1];
	vert[ 2] = org1[2] + width * right1[2];
	vert[ 3] = org1[0] - width * right1[0];
	vert[ 4] = org1[1] - width * right1[1];
	vert[ 5] = org1[2] - width * right1[2];
	vert[ 6] = org2[0] - width * right2[0];
	vert[ 7] = org2[1] - width * right2[1];
	vert[ 8] = org2[2] - width * right2[2];
	vert[ 9] = org2[0] + width * right2[0];
	vert[10] = org2[1] + width * right2[1];
	vert[11] = org2[2] + width * right2[2];
}

float spritetexcoord2f[4*2] = {0, 1, 0, 0, 1, 0, 1, 1};

void R_DrawSprite(int blendfunc1, int blendfunc2, rtexture_t *texture, rtexture_t *fogtexture, int depthdisable, const vec3_t origin, const vec3_t left, const vec3_t up, float scalex1, float scalex2, float scaley1, float scaley2, float cr, float cg, float cb, float ca)
{
	float fog = 0.0f, ifog;
	rmeshstate_t m;

	if (fogenabled)
		fog = VERTEXFOGTABLE(VectorDistance(origin, r_vieworigin));
	ifog = 1 - fog;

	R_Mesh_Matrix(&r_identitymatrix);
	GL_BlendFunc(blendfunc1, blendfunc2);
	GL_DepthMask(false);
	GL_DepthTest(!depthdisable);

	varray_vertex3f[ 0] = origin[0] + left[0] * scalex2 + up[0] * scaley1;
	varray_vertex3f[ 1] = origin[1] + left[1] * scalex2 + up[1] * scaley1;
	varray_vertex3f[ 2] = origin[2] + left[2] * scalex2 + up[2] * scaley1;
	varray_vertex3f[ 3] = origin[0] + left[0] * scalex2 + up[0] * scaley2;
	varray_vertex3f[ 4] = origin[1] + left[1] * scalex2 + up[1] * scaley2;
	varray_vertex3f[ 5] = origin[2] + left[2] * scalex2 + up[2] * scaley2;
	varray_vertex3f[ 6] = origin[0] + left[0] * scalex1 + up[0] * scaley2;
	varray_vertex3f[ 7] = origin[1] + left[1] * scalex1 + up[1] * scaley2;
	varray_vertex3f[ 8] = origin[2] + left[2] * scalex1 + up[2] * scaley2;
	varray_vertex3f[ 9] = origin[0] + left[0] * scalex1 + up[0] * scaley1;
	varray_vertex3f[10] = origin[1] + left[1] * scalex1 + up[1] * scaley1;
	varray_vertex3f[11] = origin[2] + left[2] * scalex1 + up[2] * scaley1;

	memset(&m, 0, sizeof(m));
	m.tex[0] = R_GetTexture(texture);
	m.pointer_texcoord[0] = spritetexcoord2f;
	m.pointer_vertex = varray_vertex3f;
	R_Mesh_State(&m);
	GL_Color(cr * ifog, cg * ifog, cb * ifog, ca);
	R_Mesh_Draw(0, 4, 2, polygonelements);

	if (blendfunc2 == GL_ONE_MINUS_SRC_ALPHA)
	{
		R_Mesh_TexBind(0, R_GetTexture(fogtexture));
		GL_BlendFunc(blendfunc1, GL_ONE);
		GL_Color(fogcolor[0] * fog, fogcolor[1] * fog, fogcolor[2] * fog, ca);
		R_Mesh_Draw(0, 4, 2, polygonelements);
	}
}

int R_Mesh_AddVertex3f(rmesh_t *mesh, const float *v)
{
	int i;
	float *vertex3f;
	for (i = 0, vertex3f = mesh->vertex3f;i < mesh->numvertices;i++, vertex3f += 3)
		if (VectorDistance2(v, vertex3f) < mesh->epsilon2)
			break;
	if (i == mesh->numvertices)
	{
		if (mesh->numvertices < mesh->maxvertices)
		{
			VectorCopy(v, vertex3f);
			mesh->numvertices++;
		}
		return mesh->numvertices;
	}
	else
		return i;
}

void R_Mesh_AddPolygon3f(rmesh_t *mesh, int numvertices, float *vertex3f)
{
	int i;
	int *e, element[3];
	element[0] = R_Mesh_AddVertex3f(mesh, vertex3f);vertex3f += 3;
	element[1] = R_Mesh_AddVertex3f(mesh, vertex3f);vertex3f += 3;
	e = mesh->element3i + mesh->numtriangles * 3;
	for (i = 0;i < numvertices - 2;i++, vertex3f += 3)
	{
		element[2] = R_Mesh_AddVertex3f(mesh, vertex3f);
		if (mesh->numtriangles < mesh->maxtriangles)
		{
			*e++ = element[0];
			*e++ = element[1];
			*e++ = element[2];
			mesh->numtriangles++;
		}
		element[1] = element[2];
	}
}

void R_Mesh_AddBrushMeshFromPlanes(rmesh_t *mesh, int numplanes, mplane_t *planes)
{
	int planenum, planenum2;
	int w;
	int tempnumpoints;
	mplane_t *plane, *plane2;
	float temppoints[2][256*3];
	for (planenum = 0, plane = planes;planenum < numplanes;planenum++, plane++)
	{
		w = 0;
		tempnumpoints = 4;
		PolygonF_QuadForPlane(temppoints[w], plane->normal[0], plane->normal[1], plane->normal[2], plane->normal[3], 1024.0*1024.0*1024.0);
		for (planenum2 = 0, plane2 = planes;planenum2 < numplanes && tempnumpoints >= 3;planenum2++, plane2++)
		{
			if (planenum2 == planenum)
				continue;
			PolygonF_Divide(tempnumpoints, temppoints[w], plane2->normal[0], plane2->normal[1], plane2->normal[2], plane2->dist, 1.0/32.0, 0, NULL, NULL, 256, temppoints[!w], &tempnumpoints);
			w = !w;
		}
		if (tempnumpoints < 3)
			continue;
		// generate elements forming a triangle fan for this polygon
		R_Mesh_AddPolygon3f(mesh, tempnumpoints, temppoints[w]);
	}
}

void R_Texture_AddLayer(texture_t *t, qboolean depthmask, int blendfunc1, int blendfunc2, texturelayertype_t type, rtexture_t *texture, matrix4x4_t *matrix, float r, float g, float b, float a)
{
	texturelayer_t *layer;
	layer = t->currentlayers + t->currentnumlayers++;
	layer->type = type;
	layer->depthmask = depthmask;
	layer->blendfunc1 = blendfunc1;
	layer->blendfunc2 = blendfunc2;
	layer->texture = texture;
	layer->texmatrix = *matrix;
	layer->color[0] = r;
	layer->color[1] = g;
	layer->color[2] = b;
	layer->color[3] = a;
}

void R_UpdateTextureInfo(const entity_render_t *ent, texture_t *t)
{
	// FIXME: identify models using a better check than ent->model->brush.shadowmesh
	//int lightmode = ((ent->effects & EF_FULLBRIGHT) || ent->model->brush.shadowmesh) ? 0 : 2;

	{
		texture_t *texture = t;
		model_t *model = ent->model;
		int s = ent->skinnum;
		if ((unsigned int)s >= (unsigned int)model->numskins)
			s = 0;
		if (model->skinscenes)
		{
			if (model->skinscenes[s].framecount > 1)
				s = model->skinscenes[s].firstframe + (unsigned int) (r_refdef.time * model->skinscenes[s].framerate) % model->skinscenes[s].framecount;
			else
				s = model->skinscenes[s].firstframe;
		}
		if (s > 0)
			t = t + s * model->num_surfaces;
		if (t->animated)
			t = t->anim_frames[ent->frame != 0][(t->anim_total[ent->frame != 0] >= 2) ? ((int)(r_refdef.time * 5.0f) % t->anim_total[ent->frame != 0]) : 0];
		texture->currentframe = t;
	}

	t->currentmaterialflags = t->basematerialflags;
	t->currentalpha = ent->alpha;
	if (t->basematerialflags & MATERIALFLAG_WATERALPHA)
		t->currentalpha *= r_wateralpha.value;
	if (!(ent->flags & RENDER_LIGHT))
		t->currentmaterialflags |= MATERIALFLAG_FULLBRIGHT;
	if (ent->effects & EF_ADDITIVE)
		t->currentmaterialflags |= MATERIALFLAG_ADD | MATERIALFLAG_TRANSPARENT;
	else if (t->currentalpha < 1)
		t->currentmaterialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_TRANSPARENT;
	if (ent->effects & EF_NODEPTHTEST)
		t->currentmaterialflags |= MATERIALFLAG_NODEPTHTEST;
	if (t->currentmaterialflags & MATERIALFLAG_WATER && r_waterscroll.value != 0)
		t->currenttexmatrix = r_waterscrollmatrix;
	else
		t->currenttexmatrix = r_identitymatrix;
	t->currentnumlayers = 0;
	if (!(t->currentmaterialflags & MATERIALFLAG_NODRAW))
	{
		if (gl_lightmaps.integer)
			R_Texture_AddLayer(t, true, GL_ONE, GL_ZERO, TEXTURELAYERTYPE_LITTEXTURE_MULTIPASS, r_texture_white, &r_identitymatrix, 1, 1, 1, 1);
		else if (t->currentmaterialflags & MATERIALFLAG_SKY)
		{
			// transparent sky would be ridiculous
			if (!(t->currentmaterialflags & MATERIALFLAG_TRANSPARENT))
				R_Texture_AddLayer(t, true, GL_ONE, GL_ZERO, TEXTURELAYERTYPE_SKY, r_texture_white, &r_identitymatrix, fogcolor[0], fogcolor[1], fogcolor[2], 1);
		}
		else
		{
			int blendfunc1, blendfunc2, depthmask;
			if (t->currentmaterialflags & MATERIALFLAG_ADD)
			{
				blendfunc1 = GL_SRC_ALPHA;
				blendfunc2 = GL_ONE;
				depthmask = false;
			}
			else if (t->currentmaterialflags & MATERIALFLAG_ALPHA)
			{
				blendfunc1 = GL_SRC_ALPHA;
				blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
				depthmask = false;
			}
			else
			{
				blendfunc1 = GL_ONE;
				blendfunc2 = GL_ZERO;
				depthmask = true;
			}
			if (t->currentmaterialflags & (MATERIALFLAG_WATER | MATERIALFLAG_WALL))
			{
				rtexture_t *currentbasetexture;
				int layerflags = 0;
				if (fogenabled && (t->currentmaterialflags & MATERIALFLAG_TRANSPARENT))
					layerflags |= TEXTURELAYERFLAG_FOGDARKEN;
				currentbasetexture = (ent->colormap < 0 && t->skin.merged) ? t->skin.merged : t->skin.base;
				if (t->currentmaterialflags & MATERIALFLAG_FULLBRIGHT)
				{
					// fullbright is not affected by r_lightmapintensity
					R_Texture_AddLayer(t, depthmask, blendfunc1, blendfunc2, TEXTURELAYERTYPE_TEXTURE, currentbasetexture, &t->currenttexmatrix, ent->colormod[0], ent->colormod[1], ent->colormod[2], t->currentalpha);
					if (ent->colormap >= 0 && t->skin.pants)
						R_Texture_AddLayer(t, false, GL_SRC_ALPHA, GL_ONE, TEXTURELAYERTYPE_TEXTURE, t->skin.pants, &t->currenttexmatrix, ent->colormap_pantscolor[0], ent->colormap_pantscolor[1], ent->colormap_pantscolor[2], t->currentalpha);
					if (ent->colormap >= 0 && t->skin.shirt)
						R_Texture_AddLayer(t, false, GL_SRC_ALPHA, GL_ONE, TEXTURELAYERTYPE_TEXTURE, t->skin.shirt, &t->currenttexmatrix, ent->colormap_shirtcolor[0], ent->colormap_shirtcolor[1], ent->colormap_shirtcolor[2], t->currentalpha);
				}
				else
				{
					float colorscale;
					colorscale = 2;
					// q3bsp has no lightmap updates, so the lightstylevalue that
					// would normally be baked into the lightmaptexture must be
					// applied to the color
					if (ent->model->type == mod_brushq3)
						colorscale *= r_refdef.lightstylevalue[0] * (1.0f / 256.0f);
					colorscale *= r_lightmapintensity;
					if (r_textureunits.integer >= 2 && gl_combine.integer)
						R_Texture_AddLayer(t, depthmask, blendfunc1, blendfunc2, TEXTURELAYERTYPE_LITTEXTURE_COMBINE, currentbasetexture, &t->currenttexmatrix, ent->colormod[0] * colorscale, ent->colormod[1] * colorscale, ent->colormod[2] * colorscale, t->currentalpha);
					else if ((t->currentmaterialflags & MATERIALFLAG_TRANSPARENT) == 0)
						R_Texture_AddLayer(t, true, GL_ONE, GL_ZERO, TEXTURELAYERTYPE_LITTEXTURE_MULTIPASS, currentbasetexture, &t->currenttexmatrix, ent->colormod[0] * colorscale * 0.5f, ent->colormod[1] * colorscale * 0.5f, ent->colormod[2] * colorscale * 0.5f, t->currentalpha);
					else
						R_Texture_AddLayer(t, depthmask, blendfunc1, blendfunc2, TEXTURELAYERTYPE_LITTEXTURE_VERTEX, currentbasetexture, &t->currenttexmatrix, ent->colormod[0] * colorscale, ent->colormod[1] * colorscale, ent->colormod[2] * colorscale, t->currentalpha);
					if (r_ambient.value >= (1.0f/64.0f))
						R_Texture_AddLayer(t, false, GL_SRC_ALPHA, GL_ONE, TEXTURELAYERTYPE_TEXTURE, currentbasetexture, &t->currenttexmatrix, ent->colormod[0] * r_ambient.value * (1.0f / 64.0f), ent->colormod[1] * r_ambient.value * (1.0f / 64.0f), ent->colormod[2] * r_ambient.value * (1.0f / 64.0f), t->currentalpha);
					if (ent->colormap >= 0 && t->skin.pants)
					{
						R_Texture_AddLayer(t, false, GL_SRC_ALPHA, GL_ONE, TEXTURELAYERTYPE_LITTEXTURE_VERTEX, t->skin.pants, &t->currenttexmatrix, ent->colormap_pantscolor[0] * colorscale, ent->colormap_pantscolor[1] * colorscale, ent->colormap_pantscolor[2] * colorscale, t->currentalpha);
						if (r_ambient.value >= (1.0f/64.0f))
							R_Texture_AddLayer(t, false, GL_SRC_ALPHA, GL_ONE, TEXTURELAYERTYPE_TEXTURE, t->skin.pants, &t->currenttexmatrix, ent->colormap_pantscolor[0] * r_ambient.value * (1.0f / 64.0f), ent->colormap_pantscolor[1] * r_ambient.value * (1.0f / 64.0f), ent->colormap_pantscolor[2] * r_ambient.value * (1.0f / 64.0f), t->currentalpha);
					}
					if (ent->colormap >= 0 && t->skin.shirt)
					{
						R_Texture_AddLayer(t, false, GL_SRC_ALPHA, GL_ONE, TEXTURELAYERTYPE_LITTEXTURE_VERTEX, t->skin.shirt, &t->currenttexmatrix, ent->colormap_shirtcolor[0] * colorscale, ent->colormap_shirtcolor[1] * colorscale, ent->colormap_shirtcolor[2] * colorscale, t->currentalpha);
						if (r_ambient.value >= (1.0f/64.0f))
							R_Texture_AddLayer(t, false, GL_SRC_ALPHA, GL_ONE, TEXTURELAYERTYPE_TEXTURE, t->skin.shirt, &t->currenttexmatrix, ent->colormap_shirtcolor[0] * r_ambient.value * (1.0f / 64.0f), ent->colormap_shirtcolor[1] * r_ambient.value * (1.0f / 64.0f), ent->colormap_shirtcolor[2] * r_ambient.value * (1.0f / 64.0f), t->currentalpha);
					}
				}
				if (t->skin.glow != NULL)
					R_Texture_AddLayer(t, false, GL_SRC_ALPHA, GL_ONE, TEXTURELAYERTYPE_TEXTURE, t->skin.glow, &t->currenttexmatrix, 1, 1, 1, t->currentalpha);
				if (fogenabled && !(t->currentmaterialflags & MATERIALFLAG_ADD))
				{
					// if this is opaque use alpha blend which will darken the earlier
					// passes cheaply.
					//
					// if this is an alpha blended material, all the earlier passes
					// were darkened by fog already, so we only need to add the fog
					// color ontop through the fog mask texture
					//
					// if this is an additive blended material, all the earlier passes
					// were darkened by fog already, and we should not add fog color
					// (because the background was not darkened, there is no fog color
					// that was lost behind it).
					R_Texture_AddLayer(t, false, GL_SRC_ALPHA, (t->currentmaterialflags & MATERIALFLAG_TRANSPARENT) ? GL_ONE : GL_ONE_MINUS_SRC_ALPHA, TEXTURELAYERTYPE_FOG, t->skin.fog, &r_identitymatrix, fogcolor[0], fogcolor[1], fogcolor[2], t->currentalpha);
				}
			}
		}
	}
}

void R_UpdateAllTextureInfo(entity_render_t *ent)
{
	int i;
	if (ent->model)
		for (i = 0;i < ent->model->num_textures;i++)
			R_UpdateTextureInfo(ent, ent->model->data_textures + i);
}

float *rsurface_vertex3f;
float *rsurface_svector3f;
float *rsurface_tvector3f;
float *rsurface_normal3f;
float *rsurface_lightmapcolor4f;

void RSurf_SetVertexPointer(const entity_render_t *ent, const texture_t *texture, const msurface_t *surface, const vec3_t modelorg)
{
	int i, j;
	float center[3], forward[3], right[3], up[3], v[4][3];
	matrix4x4_t matrix1, imatrix1;
	if ((ent->frameblend[0].lerp != 1 || ent->frameblend[0].frame != 0) && (surface->groupmesh->data_morphvertex3f || surface->groupmesh->data_vertexboneweights))
	{
		rsurface_vertex3f = varray_vertex3f;
		rsurface_svector3f = NULL;
		rsurface_tvector3f = NULL;
		rsurface_normal3f = NULL;
		Mod_Alias_GetMesh_Vertex3f(ent->model, ent->frameblend, surface->groupmesh, rsurface_vertex3f);
	}
	else
	{
		rsurface_vertex3f = surface->groupmesh->data_vertex3f;
		rsurface_svector3f = surface->groupmesh->data_svector3f;
		rsurface_tvector3f = surface->groupmesh->data_tvector3f;
		rsurface_normal3f = surface->groupmesh->data_normal3f;
	}
	if (texture->textureflags & Q3TEXTUREFLAG_AUTOSPRITE2)
	{
		if (!rsurface_svector3f)
		{
			rsurface_svector3f = varray_svector3f;
			rsurface_tvector3f = varray_tvector3f;
			rsurface_normal3f = varray_normal3f;
			Mod_BuildTextureVectorsAndNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, rsurface_vertex3f, surface->groupmesh->data_texcoordtexture2f, surface->groupmesh->data_element3i + surface->num_firsttriangle * 3, rsurface_svector3f, rsurface_tvector3f, rsurface_normal3f, r_smoothnormals_areaweighting.integer);
		}
		// a single autosprite surface can contain multiple sprites...
		VectorClear(forward);
		VectorClear(right);
		VectorSet(up, 0, 0, 1);
		for (j = 0;j < surface->num_vertices - 3;j += 4)
		{
			VectorClear(center);
			for (i = 0;i < 4;i++)
				VectorAdd(center, (rsurface_vertex3f + 3 * surface->num_firstvertex) + (j+i) * 3, center);
			VectorScale(center, 0.25f, center);
			// FIXME: calculate vectors from triangle edges instead of using texture vectors as an easy way out?
			Matrix4x4_FromVectors(&matrix1, (rsurface_normal3f + 3 * surface->num_firstvertex) + j*3, (rsurface_svector3f + 3 * surface->num_firstvertex) + j*3, (rsurface_tvector3f + 3 * surface->num_firstvertex) + j*3, center);
			Matrix4x4_Invert_Simple(&imatrix1, &matrix1);
			for (i = 0;i < 4;i++)
				Matrix4x4_Transform(&imatrix1, (rsurface_vertex3f + 3 * surface->num_firstvertex) + (j+i)*3, v[i]);
			forward[0] = modelorg[0] - center[0];
			forward[1] = modelorg[1] - center[1];
			VectorNormalize(forward);
			right[0] = forward[1];
			right[1] = -forward[0];
			for (i = 0;i < 4;i++)
				VectorMAMAMAM(1, center, v[i][0], forward, v[i][1], right, v[i][2], up, varray_vertex3f + (surface->num_firstvertex+i+j) * 3);
		}
		rsurface_vertex3f = varray_vertex3f;
		rsurface_svector3f = NULL;
		rsurface_tvector3f = NULL;
		rsurface_normal3f = NULL;
	}
	else if (texture->textureflags & Q3TEXTUREFLAG_AUTOSPRITE)
	{
		if (!rsurface_svector3f)
		{
			rsurface_svector3f = varray_svector3f;
			rsurface_tvector3f = varray_tvector3f;
			rsurface_normal3f = varray_normal3f;
			Mod_BuildTextureVectorsAndNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, rsurface_vertex3f, surface->groupmesh->data_texcoordtexture2f, surface->groupmesh->data_element3i + surface->num_firsttriangle * 3, rsurface_svector3f, rsurface_tvector3f, rsurface_normal3f, r_smoothnormals_areaweighting.integer);
		}
		Matrix4x4_Transform(&ent->inversematrix, r_viewforward, forward);
		Matrix4x4_Transform(&ent->inversematrix, r_viewright, right);
		Matrix4x4_Transform(&ent->inversematrix, r_viewup, up);
		// a single autosprite surface can contain multiple sprites...
		for (j = 0;j < surface->num_vertices - 3;j += 4)
		{
			VectorClear(center);
			for (i = 0;i < 4;i++)
				VectorAdd(center, (rsurface_vertex3f + 3 * surface->num_firstvertex) + (j+i) * 3, center);
			VectorScale(center, 0.25f, center);
			// FIXME: calculate vectors from triangle edges instead of using texture vectors as an easy way out?
			Matrix4x4_FromVectors(&matrix1, (rsurface_normal3f + 3 * surface->num_firstvertex) + j*3, (rsurface_svector3f + 3 * surface->num_firstvertex) + j*3, (rsurface_tvector3f + 3 * surface->num_firstvertex) + j*3, center);
			Matrix4x4_Invert_Simple(&imatrix1, &matrix1);
			for (i = 0;i < 4;i++)
				Matrix4x4_Transform(&imatrix1, (rsurface_vertex3f + 3 * surface->num_firstvertex) + (j+i)*3, v[i]);
			for (i = 0;i < 4;i++)
				VectorMAMAMAM(1, center, v[i][0], forward, v[i][1], right, v[i][2], up, varray_vertex3f + (surface->num_firstvertex+i+j) * 3);
		}
		rsurface_vertex3f = varray_vertex3f;
		rsurface_svector3f = NULL;
		rsurface_tvector3f = NULL;
		rsurface_normal3f = NULL;
	}
	R_Mesh_VertexPointer(rsurface_vertex3f);
}

void RSurf_SetColorPointer(const entity_render_t *ent, const msurface_t *surface, const vec3_t modelorg, float r, float g, float b, float a, int lightmode, qboolean applycolor, qboolean applyfog)
{
	int i;
	float f;
	float *v, *c, *c2;
	if (lightmode >= 2)
	{
		// model lighting
		vec4_t ambientcolor4f;
		vec3_t diffusecolor;
		vec3_t diffusenormal;
		if (R_LightModel(ambientcolor4f, diffusecolor, diffusenormal, ent, r*0.5f, g*0.5f, b*0.5f, a, false))
		{
			rsurface_lightmapcolor4f = varray_color4f;
			if (rsurface_normal3f == NULL)
			{
				rsurface_normal3f = varray_normal3f;
				Mod_BuildNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, rsurface_vertex3f, surface->groupmesh->data_element3i + 3 * surface->num_firsttriangle, rsurface_normal3f, r_smoothnormals_areaweighting.integer);
			}
			R_LightModel_CalcVertexColors(ambientcolor4f, diffusecolor, diffusenormal, surface->groupmesh->num_vertices, rsurface_vertex3f + 3 * surface->num_firstvertex, rsurface_normal3f + 3 * surface->num_firstvertex, rsurface_lightmapcolor4f + 4 * surface->num_firstvertex);
			r = 1;
			g = 1;
			b = 1;
			a = 1;
			applycolor = false;
		}
		else
		{
			r = ambientcolor4f[0];
			g = ambientcolor4f[1];
			b = ambientcolor4f[2];
			a = ambientcolor4f[3];
			rsurface_lightmapcolor4f = NULL;
		}
	}
	else if (lightmode >= 1)
	{
		if (surface->lightmapinfo)
		{
			for (i = 0, c = varray_color4f + 4 * surface->num_firstvertex;i < surface->num_vertices;i++, c += 4)
			{
				const unsigned char *lm = surface->lightmapinfo->samples + (surface->groupmesh->data_lightmapoffsets + surface->num_firstvertex)[i];
				if (lm)
				{
					float scale = r_refdef.lightstylevalue[surface->lightmapinfo->styles[0]] * (1.0f / 32768.0f);
					VectorScale(lm, scale, c);
					if (surface->lightmapinfo->styles[1] != 255)
					{
						int size3 = ((surface->lightmapinfo->extents[0]>>4)+1)*((surface->lightmapinfo->extents[1]>>4)+1)*3;
						lm += size3;
						scale = r_refdef.lightstylevalue[surface->lightmapinfo->styles[1]] * (1.0f / 32768.0f);
						VectorMA(c, scale, lm, c);
						if (surface->lightmapinfo->styles[2] != 255)
						{
							lm += size3;
							scale = r_refdef.lightstylevalue[surface->lightmapinfo->styles[2]] * (1.0f / 32768.0f);
							VectorMA(c, scale, lm, c);
							if (surface->lightmapinfo->styles[3] != 255)
							{
								lm += size3;
								scale = r_refdef.lightstylevalue[surface->lightmapinfo->styles[3]] * (1.0f / 32768.0f);
								VectorMA(c, scale, lm, c);
							}
						}
					}
				}
				else
					VectorClear(c);
			}
			rsurface_lightmapcolor4f = varray_color4f;
		}
		else
			rsurface_lightmapcolor4f = surface->groupmesh->data_lightmapcolor4f;
	}
	else
		rsurface_lightmapcolor4f = NULL;
	if (applyfog)
	{
		if (rsurface_lightmapcolor4f)
		{
			for (i = 0, v = (rsurface_vertex3f + 3 * surface->num_firstvertex), c = (rsurface_lightmapcolor4f + 4 * surface->num_firstvertex), c2 = (varray_color4f + 4 * surface->num_firstvertex);i < surface->num_vertices;i++, v += 3, c += 4, c2 += 4)
			{
				f = 1 - VERTEXFOGTABLE(VectorDistance(v, modelorg));
				c2[0] = c[0] * f;
				c2[1] = c[1] * f;
				c2[2] = c[2] * f;
				c2[3] = c[3];
			}
		}
		else
		{
			for (i = 0, v = (rsurface_vertex3f + 3 * surface->num_firstvertex), c2 = (varray_color4f + 4 * surface->num_firstvertex);i < surface->num_vertices;i++, v += 3, c2 += 4)
			{
				f = 1 - VERTEXFOGTABLE(VectorDistance(v, modelorg));
				c2[0] = f;
				c2[1] = f;
				c2[2] = f;
				c2[3] = 1;
			}
		}
		rsurface_lightmapcolor4f = varray_color4f;
	}
	if (applycolor && rsurface_lightmapcolor4f)
	{
		for (i = 0, c = (rsurface_lightmapcolor4f + 4 * surface->num_firstvertex), c2 = (varray_color4f + 4 * surface->num_firstvertex);i < surface->num_vertices;i++, c += 4, c2 += 4)
		{
			c2[0] = c[0] * r;
			c2[1] = c[1] * g;
			c2[2] = c[2] * b;
			c2[3] = c[3] * a;
		}
		rsurface_lightmapcolor4f = varray_color4f;
	}
	R_Mesh_ColorPointer(rsurface_lightmapcolor4f);
	GL_Color(r, g, b, a);
}

static void R_DrawTextureSurfaceList(const entity_render_t *ent, texture_t *texture, int texturenumsurfaces, const msurface_t **texturesurfacelist, const vec3_t modelorg)
{
	int texturesurfaceindex;
	int lightmode;
	const msurface_t *surface;
	qboolean applycolor;
	rmeshstate_t m;
	if (texture->currentmaterialflags & MATERIALFLAG_NODRAW)
		return;
	renderstats.entities_surfaces += texturenumsurfaces;
	// FIXME: identify models using a better check than ent->model->brush.shadowmesh
	lightmode = ((ent->effects & EF_FULLBRIGHT) || ent->model->brush.shadowmesh) ? 0 : 2;
	GL_DepthTest(!(texture->currentmaterialflags & MATERIALFLAG_NODEPTHTEST));
	if (texture->textureflags & Q3TEXTUREFLAG_TWOSIDED)
		qglDisable(GL_CULL_FACE);
	if (texture->currentnumlayers)
	{
		int layerindex;
		texturelayer_t *layer;
		for (layerindex = 0, layer = texture->currentlayers;layerindex < texture->currentnumlayers;layerindex++, layer++)
		{
			vec4_t layercolor;
			int layertexrgbscale;
			GL_DepthMask(layer->depthmask);
			GL_BlendFunc(layer->blendfunc1, layer->blendfunc2);
			if ((layer->color[0] > 2 || layer->color[1] > 2 || layer->color[2] > 2) && (gl_combine.integer || layer->depthmask))
			{
				layertexrgbscale = 4;
				VectorScale(layer->color, 0.25f, layercolor);
			}
			else if ((layer->color[0] > 1 || layer->color[1] > 1 || layer->color[2] > 1) && (gl_combine.integer || layer->depthmask))
			{
				layertexrgbscale = 2;
				VectorScale(layer->color, 0.5f, layercolor);
			}
			else
			{
				layertexrgbscale = 1;
				VectorScale(layer->color, 1.0f, layercolor);
			}
			layercolor[3] = layer->color[3];
			GL_Color(layercolor[0], layercolor[1], layercolor[2], layercolor[3]);
			applycolor = layercolor[0] != 1 || layercolor[1] != 1 || layercolor[2] != 1 || layercolor[3] != 1;
			switch (layer->type)
			{
			case TEXTURELAYERTYPE_SKY:
				if (skyrendernow)
				{
					skyrendernow = false;
					if (skyrendermasked)
					{
						R_Sky();
						// restore entity matrix and GL_Color
						R_Mesh_Matrix(&ent->matrix);
						GL_Color(layercolor[0], layercolor[1], layercolor[2], layercolor[3]);
					}
				}
				// LordHavoc: HalfLife maps have freaky skypolys...
				//if (!ent->model->brush.ishlbsp)
				{
					if (skyrendermasked)
					{
						// depth-only (masking)
						GL_ColorMask(0,0,0,0);
						// just to make sure that braindead drivers don't draw anything
						// despite that colormask...
						GL_BlendFunc(GL_ZERO, GL_ONE);
					}
					else
					{
						// fog sky
						GL_BlendFunc(GL_ONE, GL_ZERO);
					}
					memset(&m, 0, sizeof(m));
					R_Mesh_State(&m);
					for (texturesurfaceindex = 0;texturesurfaceindex < texturenumsurfaces;texturesurfaceindex++)
					{
						surface = texturesurfacelist[texturesurfaceindex];
						RSurf_SetVertexPointer(ent, texture, surface, modelorg);
						GL_LockArrays(surface->num_firstvertex, surface->num_vertices);
						R_Mesh_Draw(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, (surface->groupmesh->data_element3i + 3 * surface->num_firsttriangle));
						GL_LockArrays(0, 0);
					}
					if (skyrendermasked)
						GL_ColorMask(r_refdef.colormask[0], r_refdef.colormask[1], r_refdef.colormask[2], 1);
				}
				break;
			case TEXTURELAYERTYPE_LITTEXTURE_COMBINE:
				memset(&m, 0, sizeof(m));
				m.tex[1] = R_GetTexture(layer->texture);
				m.texmatrix[1] = layer->texmatrix;
				m.texrgbscale[1] = layertexrgbscale;
				m.pointer_color = varray_color4f;
				R_Mesh_State(&m);
				for (texturesurfaceindex = 0;texturesurfaceindex < texturenumsurfaces;texturesurfaceindex++)
				{
					surface = texturesurfacelist[texturesurfaceindex];
					RSurf_SetVertexPointer(ent, texture, surface, modelorg);
					R_Mesh_TexCoordPointer(0, 2, surface->groupmesh->data_texcoordlightmap2f);
					R_Mesh_TexCoordPointer(1, 2, surface->groupmesh->data_texcoordtexture2f);
					if (lightmode == 2)
					{
						R_Mesh_TexBind(0, R_GetTexture(r_texture_white));
						RSurf_SetColorPointer(ent, surface, modelorg, layercolor[0], layercolor[1], layercolor[2], layercolor[3], 2, applycolor, layer->flags & TEXTURELAYERFLAG_FOGDARKEN);
					}
					else if (surface->lightmaptexture)
					{
						R_Mesh_TexBind(0, R_GetTexture(surface->lightmaptexture));
						RSurf_SetColorPointer(ent, surface, modelorg, layercolor[0], layercolor[1], layercolor[2], layercolor[3], 0, applycolor, layer->flags & TEXTURELAYERFLAG_FOGDARKEN);
					}
					else
					{
						R_Mesh_TexBind(0, R_GetTexture(r_texture_white));
						RSurf_SetColorPointer(ent, surface, modelorg, layercolor[0], layercolor[1], layercolor[2], layercolor[3], 1, applycolor, layer->flags & TEXTURELAYERFLAG_FOGDARKEN);
					}
					GL_LockArrays(surface->num_firstvertex, surface->num_vertices);
					R_Mesh_Draw(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, (surface->groupmesh->data_element3i + 3 * surface->num_firsttriangle));
					GL_LockArrays(0, 0);
				}
				break;
			case TEXTURELAYERTYPE_LITTEXTURE_MULTIPASS:
				memset(&m, 0, sizeof(m));
				m.tex[0] = R_GetTexture(layer->texture);
				m.texmatrix[0] = layer->texmatrix;
				m.pointer_color = varray_color4f;
				m.texrgbscale[0] = layertexrgbscale;
				R_Mesh_State(&m);
				for (texturesurfaceindex = 0;texturesurfaceindex < texturenumsurfaces;texturesurfaceindex++)
				{
					surface = texturesurfacelist[texturesurfaceindex];
					RSurf_SetVertexPointer(ent, texture, surface, modelorg);
					R_Mesh_TexCoordPointer(0, 2, surface->groupmesh->data_texcoordlightmap2f);
					if (lightmode == 2)
					{
						R_Mesh_TexBind(0, R_GetTexture(r_texture_white));
						RSurf_SetColorPointer(ent, surface, modelorg, 1, 1, 1, 1, 2, false, false);
					}
					else if (surface->lightmaptexture)
					{
						R_Mesh_TexBind(0, R_GetTexture(surface->lightmaptexture));
						R_Mesh_ColorPointer(NULL);
					}
					else
					{
						R_Mesh_TexBind(0, R_GetTexture(r_texture_white));
						RSurf_SetColorPointer(ent, surface, modelorg, 1, 1, 1, 1, 1, false, false);
					}
					GL_LockArrays(surface->num_firstvertex, surface->num_vertices);
					R_Mesh_Draw(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, (surface->groupmesh->data_element3i + 3 * surface->num_firsttriangle));
					GL_LockArrays(0, 0);
				}
				GL_BlendFunc(GL_DST_COLOR, GL_SRC_COLOR);
				memset(&m, 0, sizeof(m));
				m.tex[0] = R_GetTexture(layer->texture);
				m.texmatrix[0] = layer->texmatrix;
				m.pointer_color = varray_color4f;
				m.texrgbscale[0] = layertexrgbscale;
				R_Mesh_State(&m);
				for (texturesurfaceindex = 0;texturesurfaceindex < texturenumsurfaces;texturesurfaceindex++)
				{
					surface = texturesurfacelist[texturesurfaceindex];
					RSurf_SetVertexPointer(ent, texture, surface, modelorg);
					R_Mesh_TexCoordPointer(0, 2, surface->groupmesh->data_texcoordtexture2f);
					RSurf_SetColorPointer(ent, surface, modelorg, layercolor[0], layercolor[1], layercolor[2], layercolor[3], 0, applycolor, layer->flags & TEXTURELAYERFLAG_FOGDARKEN);
					GL_LockArrays(surface->num_firstvertex, surface->num_vertices);
					R_Mesh_Draw(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, (surface->groupmesh->data_element3i + 3 * surface->num_firsttriangle));
					GL_LockArrays(0, 0);
				}
				break;
			case TEXTURELAYERTYPE_LITTEXTURE_VERTEX:
				memset(&m, 0, sizeof(m));
				m.tex[0] = R_GetTexture(layer->texture);
				m.texmatrix[0] = layer->texmatrix;
				m.texrgbscale[0] = layertexrgbscale;
				m.pointer_color = varray_color4f;
				R_Mesh_State(&m);
				for (texturesurfaceindex = 0;texturesurfaceindex < texturenumsurfaces;texturesurfaceindex++)
				{
					surface = texturesurfacelist[texturesurfaceindex];
					RSurf_SetVertexPointer(ent, texture, surface, modelorg);
					R_Mesh_TexCoordPointer(0, 2, surface->groupmesh->data_texcoordtexture2f);
					RSurf_SetColorPointer(ent, surface, modelorg, layercolor[0], layercolor[1], layercolor[2], layercolor[3], lightmode ? lightmode : 1, applycolor, layer->flags & TEXTURELAYERFLAG_FOGDARKEN);
					GL_LockArrays(surface->num_firstvertex, surface->num_vertices);
					R_Mesh_Draw(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, (surface->groupmesh->data_element3i + 3 * surface->num_firsttriangle));
					GL_LockArrays(0, 0);
				}
				break;
			case TEXTURELAYERTYPE_TEXTURE:
				memset(&m, 0, sizeof(m));
				m.tex[0] = R_GetTexture(layer->texture);
				m.texmatrix[0] = layer->texmatrix;
				m.pointer_color = varray_color4f;
				m.texrgbscale[0] = layertexrgbscale;
				R_Mesh_State(&m);
				for (texturesurfaceindex = 0;texturesurfaceindex < texturenumsurfaces;texturesurfaceindex++)
				{
					surface = texturesurfacelist[texturesurfaceindex];
					RSurf_SetVertexPointer(ent, texture, surface, modelorg);
					R_Mesh_TexCoordPointer(0, 2, surface->groupmesh->data_texcoordtexture2f);
					RSurf_SetColorPointer(ent, surface, modelorg, layercolor[0], layercolor[1], layercolor[2], layercolor[3], 0, applycolor, layer->flags & TEXTURELAYERFLAG_FOGDARKEN);
					GL_LockArrays(surface->num_firstvertex, surface->num_vertices);
					R_Mesh_Draw(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, (surface->groupmesh->data_element3i + 3 * surface->num_firsttriangle));
					GL_LockArrays(0, 0);
				}
				break;
			case TEXTURELAYERTYPE_FOG:
				memset(&m, 0, sizeof(m));
				if (layer->texture)
				{
					m.tex[0] = R_GetTexture(layer->texture);
					m.texmatrix[0] = layer->texmatrix;
				}
				R_Mesh_State(&m);
				for (texturesurfaceindex = 0;texturesurfaceindex < texturenumsurfaces;texturesurfaceindex++)
				{
					int i;
					float f, *v, *c;
					surface = texturesurfacelist[texturesurfaceindex];
					RSurf_SetVertexPointer(ent, texture, surface, modelorg);
					if (layer->texture)
						R_Mesh_TexCoordPointer(0, 2, surface->groupmesh->data_texcoordtexture2f);
					R_Mesh_ColorPointer(varray_color4f);
					for (i = 0, v = (rsurface_vertex3f + 3 * surface->num_firstvertex), c = (varray_color4f + 4 * surface->num_firstvertex);i < surface->num_vertices;i++, v += 3, c += 4)
					{
						f = VERTEXFOGTABLE(VectorDistance(v, modelorg));
						c[0] = layercolor[0];
						c[1] = layercolor[1];
						c[2] = layercolor[2];
						c[3] = f * layercolor[3];
					}
					GL_LockArrays(surface->num_firstvertex, surface->num_vertices);
					R_Mesh_Draw(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, (surface->groupmesh->data_element3i + 3 * surface->num_firsttriangle));
					GL_LockArrays(0, 0);
				}
				break;
			default:
				Con_Printf("R_DrawTextureSurfaceList: unknown layer type %i\n", layer->type);
			}
			// if trying to do overbright on first pass of an opaque surface
			// when combine is not supported, brighten as a post process
			if (layertexrgbscale > 1 && !gl_combine.integer && layer->depthmask)
			{
				int scale;
				GL_BlendFunc(GL_DST_COLOR, GL_SRC_COLOR);
				GL_Color(1, 1, 1, 1);
				memset(&m, 0, sizeof(m));
				R_Mesh_State(&m);
				for (texturesurfaceindex = 0;texturesurfaceindex < texturenumsurfaces;texturesurfaceindex++)
				{
					surface = texturesurfacelist[texturesurfaceindex];
					RSurf_SetVertexPointer(ent, texture, surface, modelorg);
					GL_LockArrays(surface->num_firstvertex, surface->num_vertices);
					for (scale = 1;scale < layertexrgbscale;scale <<= 1)
						R_Mesh_Draw(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, (surface->groupmesh->data_element3i + 3 * surface->num_firsttriangle));
					GL_LockArrays(0, 0);
				}
			}
		}
		if (r_shownormals.integer && !r_showtrispass)
		{
			int j, k;
			float v[3];
			GL_DepthTest(true);
			GL_DepthMask(texture->currentlayers->depthmask);
			GL_BlendFunc(texture->currentlayers->blendfunc1, texture->currentlayers->blendfunc2);
			memset(&m, 0, sizeof(m));
			R_Mesh_State(&m);
			for (texturesurfaceindex = 0;texturesurfaceindex < texturenumsurfaces;texturesurfaceindex++)
			{
				surface = texturesurfacelist[texturesurfaceindex];
				RSurf_SetVertexPointer(ent, texture, surface, modelorg);
				if (!rsurface_svector3f)
				{
					rsurface_svector3f = varray_svector3f;
					rsurface_tvector3f = varray_tvector3f;
					rsurface_normal3f = varray_normal3f;
					Mod_BuildTextureVectorsAndNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, rsurface_vertex3f, surface->groupmesh->data_texcoordtexture2f, surface->groupmesh->data_element3i + surface->num_firsttriangle * 3, rsurface_svector3f, rsurface_tvector3f, rsurface_normal3f, r_smoothnormals_areaweighting.integer);
				}
				GL_Color(1, 0, 0, 1);
				qglBegin(GL_LINES);
				for (j = 0, k = surface->num_firstvertex;j < surface->num_vertices;j++, k++)
				{
					VectorCopy(rsurface_vertex3f + k * 3, v);
					qglVertex3f(v[0], v[1], v[2]);
					VectorMA(v, 8, rsurface_svector3f + k * 3, v);
					qglVertex3f(v[0], v[1], v[2]);
				}
				GL_Color(0, 0, 1, 1);
				for (j = 0, k = surface->num_firstvertex;j < surface->num_vertices;j++, k++)
				{
					VectorCopy(rsurface_vertex3f + k * 3, v);
					qglVertex3f(v[0], v[1], v[2]);
					VectorMA(v, 8, rsurface_tvector3f + k * 3, v);
					qglVertex3f(v[0], v[1], v[2]);
				}
				GL_Color(0, 1, 0, 1);
				for (j = 0, k = surface->num_firstvertex;j < surface->num_vertices;j++, k++)
				{
					VectorCopy(rsurface_vertex3f + k * 3, v);
					qglVertex3f(v[0], v[1], v[2]);
					VectorMA(v, 8, rsurface_normal3f + k * 3, v);
					qglVertex3f(v[0], v[1], v[2]);
				}
				qglEnd();
			}
		}
	}
	if (texture->textureflags & Q3TEXTUREFLAG_TWOSIDED)
		qglEnable(GL_CULL_FACE);
}

static void R_DrawSurface_TransparentCallback(const entity_render_t *ent, int surfacenumber, const rtlight_t *rtlight)
{
	const msurface_t *surface = ent->model->data_surfaces + surfacenumber;
	vec3_t modelorg;
	texture_t *texture;

	texture = surface->texture;
	if (texture->basematerialflags & MATERIALFLAG_SKY)
		return; // transparent sky is too difficult
	R_UpdateTextureInfo(ent, texture);

	R_Mesh_Matrix(&ent->matrix);
	Matrix4x4_Transform(&ent->inversematrix, r_vieworigin, modelorg);
	R_DrawTextureSurfaceList(ent, texture->currentframe, 1, &surface, modelorg);
}

void R_QueueTextureSurfaceList(entity_render_t *ent, texture_t *texture, int texturenumsurfaces, const msurface_t **texturesurfacelist, const vec3_t modelorg)
{
	int texturesurfaceindex;
	const msurface_t *surface;
	vec3_t tempcenter, center;
	if (texture->currentmaterialflags & MATERIALFLAG_TRANSPARENT)
	{
		// drawing sky transparently would be too difficult
		if (!(texture->currentmaterialflags & MATERIALFLAG_SKY))
		{
			for (texturesurfaceindex = 0;texturesurfaceindex < texturenumsurfaces;texturesurfaceindex++)
			{
				surface = texturesurfacelist[texturesurfaceindex];
				tempcenter[0] = (surface->mins[0] + surface->maxs[0]) * 0.5f;
				tempcenter[1] = (surface->mins[1] + surface->maxs[1]) * 0.5f;
				tempcenter[2] = (surface->mins[2] + surface->maxs[2]) * 0.5f;
				Matrix4x4_Transform(&ent->matrix, tempcenter, center);
				R_MeshQueue_AddTransparent(texture->currentmaterialflags & MATERIALFLAG_NODEPTHTEST ? r_vieworigin : center, R_DrawSurface_TransparentCallback, ent, surface - ent->model->data_surfaces, r_shadow_rtlight);
			}
		}
	}
	else
		R_DrawTextureSurfaceList(ent, texture, texturenumsurfaces, texturesurfacelist, modelorg);
}

extern void R_BuildLightMap(const entity_render_t *ent, msurface_t *surface);
void R_DrawSurfaces(entity_render_t *ent, qboolean skysurfaces)
{
	int i, j, f, flagsmask;
	int counttriangles = 0;
	msurface_t *surface, **surfacechain;
	texture_t *t, *texture;
	model_t *model = ent->model;
	vec3_t modelorg;
	const int maxsurfacelist = 1024;
	int numsurfacelist = 0;
	const msurface_t *surfacelist[1024];
	if (model == NULL)
		return;
	R_Mesh_Matrix(&ent->matrix);
	Matrix4x4_Transform(&ent->inversematrix, r_vieworigin, modelorg);

	// update light styles
	if (!skysurfaces && model->brushq1.light_styleupdatechains)
	{
		for (i = 0;i < model->brushq1.light_styles;i++)
		{
			if (model->brushq1.light_stylevalue[i] != r_refdef.lightstylevalue[model->brushq1.light_style[i]])
			{
				model->brushq1.light_stylevalue[i] = r_refdef.lightstylevalue[model->brushq1.light_style[i]];
				if ((surfacechain = model->brushq1.light_styleupdatechains[i]))
					for (;(surface = *surfacechain);surfacechain++)
						surface->cached_dlight = true;
			}
		}
	}

	R_UpdateAllTextureInfo(ent);
	flagsmask = skysurfaces ? MATERIALFLAG_SKY : (MATERIALFLAG_WATER | MATERIALFLAG_WALL);
	f = 0;
	t = NULL;
	texture = NULL;
	numsurfacelist = 0;
	if (ent == r_refdef.worldentity)
	{
		for (i = 0, j = model->firstmodelsurface, surface = model->data_surfaces + j;i < model->nummodelsurfaces;i++, j++, surface++)
		{
			if (!r_worldsurfacevisible[j])
				continue;
			if (t != surface->texture)
			{
				if (numsurfacelist)
				{
					R_QueueTextureSurfaceList(ent, texture, numsurfacelist, surfacelist, modelorg);
					numsurfacelist = 0;
				}
				t = surface->texture;
				texture = t->currentframe;
				f = texture->currentmaterialflags & flagsmask;
			}
			if (f && surface->num_triangles)
			{
				// if lightmap parameters changed, rebuild lightmap texture
				if (surface->cached_dlight && surface->lightmapinfo->samples)
					R_BuildLightMap(ent, surface);
				// add face to draw list
				surfacelist[numsurfacelist++] = surface;
				counttriangles += surface->num_triangles;
				if (numsurfacelist >= maxsurfacelist)
				{
					R_QueueTextureSurfaceList(ent, texture, numsurfacelist, surfacelist, modelorg);
					numsurfacelist = 0;
				}
			}
		}
	}
	else
	{
		for (i = 0, j = model->firstmodelsurface, surface = model->data_surfaces + j;i < model->nummodelsurfaces;i++, j++, surface++)
		{
			if (t != surface->texture)
			{
				if (numsurfacelist)
				{
					R_QueueTextureSurfaceList(ent, texture, numsurfacelist, surfacelist, modelorg);
					numsurfacelist = 0;
				}
				t = surface->texture;
				texture = t->currentframe;
				f = texture->currentmaterialflags & flagsmask;
			}
			if (f && surface->num_triangles)
			{
				// if lightmap parameters changed, rebuild lightmap texture
				if (surface->cached_dlight && surface->lightmapinfo->samples)
					R_BuildLightMap(ent, surface);
				// add face to draw list
				surfacelist[numsurfacelist++] = surface;
				counttriangles += surface->num_triangles;
				if (numsurfacelist >= maxsurfacelist)
				{
					R_QueueTextureSurfaceList(ent, texture, numsurfacelist, surfacelist, modelorg);
					numsurfacelist = 0;
				}
			}
		}
	}
	if (numsurfacelist)
		R_QueueTextureSurfaceList(ent, texture, numsurfacelist, surfacelist, modelorg);
	if (!r_showtrispass)
		renderstats.entities_triangles += counttriangles;
}