implemented vbo rendering of map, models, and compiled shadow volumes

[xonotic/darkplaces.git] / model_shared.h

/*
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.

*/

#ifndef MODEL_SHARED_H
#define MODEL_SHARED_H

typedef enum synctype_e {ST_SYNC=0, ST_RAND } synctype_t;

/*

d*_t structures are on-disk representations
m*_t structures are in-memory

*/

typedef enum modtype_e {mod_invalid, mod_brushq1, mod_sprite, mod_alias, mod_brushq2, mod_brushq3} modtype_t;

typedef struct animscene_s
{
        char name[32]; // for viewthing support
        int firstframe;
        int framecount;
        int loop; // true or false
        float framerate;
}
animscene_t;

typedef struct skinframe_s
{
        rtexture_t *stain; // inverse modulate with background (used for decals and such)
        rtexture_t *merged; // original texture without glow
        rtexture_t *base; // original texture without pants/shirt/glow
        rtexture_t *pants; // pants only (in greyscale)
        rtexture_t *shirt; // shirt only (in greyscale)
        rtexture_t *nmap; // normalmap (bumpmap for dot3)
        rtexture_t *gloss; // glossmap (for dot3)
        rtexture_t *glow; // glow only (fullbrights)
        rtexture_t *fog; // alpha of the base texture (if not opaque)
}
skinframe_t;

#define MAX_SKINS 256

typedef struct overridetagname_s
{
        char name[MAX_QPATH];
}
overridetagname_t;

// a replacement set of tag names, per skin
typedef struct overridetagnameset_s
{
        int num_overridetagnames;
        overridetagname_t *data_overridetagnames;
}
overridetagnameset_t;

struct md3vertex_s;
struct trivertex_s;

// used for mesh lists in q1bsp/q3bsp map models
// (the surfaces reference portions of these meshes)
typedef struct surfmesh_s
{
        // triangle data in system memory
        int num_triangles; // number of triangles in the mesh
        int *data_element3i; // int[tris*3] triangles of the mesh, 3 indices into vertex arrays for each
        int *data_neighbor3i; // int[tris*3] neighboring triangle on each edge (-1 if none)
        // element buffer object (stores triangles in video memory)
        int ebo;
        // vertex data in system memory
        int num_vertices; // number of vertices in the mesh
        float *data_vertex3f; // float[verts*3] vertex locations
        float *data_svector3f; // float[verts*3] direction of 'S' (right) texture axis for each vertex
        float *data_tvector3f; // float[verts*3] direction of 'T' (down) texture axis for each vertex
        float *data_normal3f; // float[verts*3] direction of 'R' (out) texture axis for each vertex
        float *data_texcoordtexture2f; // float[verts*2] texcoords for surface texture
        float *data_texcoordlightmap2f; // float[verts*2] texcoords for lightmap texture
        float *data_lightmapcolor4f;
        int *data_lightmapoffsets; // index into surface's lightmap samples for vertex lighting
        // vertex buffer object (stores geometry in video memory)
        int vbo;
        size_t vbooffset_vertex3f;
        size_t vbooffset_svector3f;
        size_t vbooffset_tvector3f;
        size_t vbooffset_normal3f;
        size_t vbooffset_texcoordtexture2f;
        size_t vbooffset_texcoordlightmap2f;
        size_t vbooffset_lightmapcolor4f;
        // morph blending, these are zero if model is skeletal or static
        int num_morphframes;
        struct md3vertex_s *data_morphmd3vertex;
        struct trivertx_s *data_morphmdlvertex;
        float *data_morphmd2framesize6f;
        float num_morphmdlframescale[3];
        float num_morphmdlframetranslate[3];
        // skeletal blending, these are NULL if model is morph or static
        int *data_vertexweightindex4i;
        float *data_vertexweightinfluence4f;
        // set if there is some kind of animation on this model
        qboolean isanimated;
}
surfmesh_t;

#define SHADOWMESHVERTEXHASH 1024
typedef struct shadowmeshvertexhash_s
{
        struct shadowmeshvertexhash_s *next;
}
shadowmeshvertexhash_t;

typedef struct shadowmesh_s
{
        // next mesh in chain
        struct shadowmesh_s *next;
        // used for light mesh (NULL on shadow mesh)
        rtexture_t *map_diffuse;
        rtexture_t *map_specular;
        rtexture_t *map_normal;
        // buffer sizes
        int numverts, maxverts;
        int numtriangles, maxtriangles;
        // used always
        float *vertex3f;
        // used for light mesh (NULL on shadow mesh)
        float *svector3f;
        float *tvector3f;
        float *normal3f;
        float *texcoord2f;
        // used always
        int *element3i;
        // used for shadow mesh (NULL on light mesh)
        int *neighbor3i;
        // these are NULL after Mod_ShadowMesh_Finish is performed, only used
        // while building meshes
        shadowmeshvertexhash_t **vertexhashtable, *vertexhashentries;
        // element buffer object (stores triangles in video memory)
        // (created by Mod_ShadowMesh_Finish if possible)
        int ebo;
        // vertex buffer object (stores vertices in video memory)
        // (created by Mod_ShadowMesh_Finish if possible)
        int vbo;
        size_t vbooffset_vertex3f;
        size_t vbooffset_svector3f;
        size_t vbooffset_tvector3f;
        size_t vbooffset_normal3f;
        size_t vbooffset_texcoord2f;
}
shadowmesh_t;

#define TEXTURE_MAXFRAMES 64

typedef enum texturelayertype_e
{
        TEXTURELAYERTYPE_INVALID,
        TEXTURELAYERTYPE_LITTEXTURE,
        TEXTURELAYERTYPE_TEXTURE,
        TEXTURELAYERTYPE_FOG,
}
texturelayertype_t;

typedef enum texturelayerflag_e
{
        // indicates that the pass should apply fog darkening; used on
        // transparent surfaces where simply blending an alpha fog as a final
        // pass would not behave properly, so all the surfaces must be darkened,
        // and the fog color added as a separate pass
        TEXTURELAYERFLAG_FOGDARKEN = 1,
}
texturelayerflag_t;

typedef struct texturelayer_s
{
        texturelayertype_t type;
        qboolean depthmask;
        int blendfunc1;
        int blendfunc2;
        rtexture_t *texture;
        matrix4x4_t texmatrix;
        vec4_t color;
        int flags;
}
texturelayer_t;

typedef struct texture_s
{
        // q1bsp
        // name
        //char name[16];
        // size
        unsigned int width, height;
        // SURF_ flags
        //unsigned int flags;

        // base material flags
        int basematerialflags;
        // current material flags (updated each bmodel render)
        int currentmaterialflags;

        // textures to use when rendering this material
        skinframe_t *currentskinframe;
        int numskinframes;
        float skinframerate;
        skinframe_t skinframes[TEXTURE_MAXFRAMES];
        // background layer (for terrain texture blending)
        skinframe_t *backgroundcurrentskinframe;
        int backgroundnumskinframes;
        float backgroundskinframerate;
        skinframe_t backgroundskinframes[TEXTURE_MAXFRAMES];

        // total frames in sequence and alternate sequence
        int anim_total[2];
        // direct pointers to each of the frames in the sequences
        // (indexed as [alternate][frame])
        struct texture_s *anim_frames[2][10];
        // set if animated or there is an alternate frame set
        // (this is an optimization in the renderer)
        int animated;

        // the current alpha of this texture (may be affected by r_wateralpha)
        float currentalpha;
        // the current texture frame in animation
        struct texture_s *currentframe;
        // current texture transform matrix (used for water scrolling)
        matrix4x4_t currenttexmatrix;

        qboolean colormapping;
        rtexture_t *basetexture;
        rtexture_t *glosstexture;
        rtexture_t *backgroundbasetexture;
        rtexture_t *backgroundglosstexture;
        float specularscale;
        float specularpower;

        // from q3 shaders
        int customblendfunc[2];

        int currentnumlayers;
        texturelayer_t currentlayers[16];

        // q3bsp
        char name[64];
        int surfaceflags;
        int supercontents;
        int surfaceparms;
        int textureflags;

        //skinframe_t skin;
}
texture_t;

typedef struct mtexinfo_s
{
        float vecs[2][4];
        texture_t *texture;
        int flags;
}
mtexinfo_t;

typedef struct msurface_lightmapinfo_s
{
        // texture mapping properties used by this surface
        mtexinfo_t *texinfo; // q1bsp
        // index into r_refdef.lightstylevalue array, 255 means not used (black)
        unsigned char styles[MAXLIGHTMAPS]; // q1bsp
        // RGB lighting data [numstyles][height][width][3]
        unsigned char *samples; // q1bsp
        // RGB normalmap data [numstyles][height][width][3]
        unsigned char *nmapsamples; // q1bsp
        // stain to apply on lightmap (soot/dirt/blood/whatever)
        unsigned char *stainsamples; // q1bsp
        int texturemins[2]; // q1bsp
        int extents[2]; // q1bsp
        int lightmaporigin[2]; // q1bsp
}
msurface_lightmapinfo_t;

struct q3deffect_s;
typedef struct msurface_s
{
        // bounding box for onscreen checks
        vec3_t mins;
        vec3_t maxs;
        // the texture to use on the surface
        texture_t *texture;
        // the lightmap texture fragment to use on the rendering mesh
        rtexture_t *lightmaptexture;
        // the lighting direction texture fragment to use on the rendering mesh
        rtexture_t *deluxemaptexture;

        // surfaces own ranges of vertices and triangles in the model->surfmesh
        int num_triangles; // number of triangles
        int num_firsttriangle; // first triangle
        int num_vertices; // number of vertices
        int num_firstvertex; // first vertex

        // shadow volume building information
        int num_firstshadowmeshtriangle; // index into model->brush.shadowmesh

        // lightmaptexture rebuild information not used in q3bsp
        int cached_dlight; // q1bsp // forces rebuild of lightmaptexture
        msurface_lightmapinfo_t *lightmapinfo; // q1bsp

        // mesh information for collisions (only used by q3bsp curves)
        int num_collisiontriangles; // q3bsp
        int *data_collisionelement3i; // q3bsp
        int num_collisionvertices; // q3bsp
        float *data_collisionvertex3f; // q3bsp
        struct q3deffect_s *effect; // q3bsp
        // FIXME: collisionmarkframe should be kept in a separate array
        int collisionmarkframe; // q3bsp // don't collide twice in one trace
}
msurface_t;

#include "matrixlib.h"

#include "model_brush.h"
#include "model_sprite.h"
#include "model_alias.h"

typedef struct model_sprite_s
{
        int                             sprnum_type;
        mspriteframe_t  *sprdata_frames;
}
model_sprite_t;

struct trace_s;

typedef struct model_brush_s
{
        // true if this model is a HalfLife .bsp file
        qboolean ishlbsp;
        // true if this model is a Martial Concert .bsp file
        qboolean ismcbsp;
        // string of entity definitions (.map format)
        char *entities;

        // if non-zero this is a submodel
        // (this is the number of the submodel, an index into submodels)
        int submodel;

        // number of submodels in this map (just used by server to know how many
        // submodels to load)
        int numsubmodels;
        // pointers to each of the submodels if .isworldmodel is true
        struct model_s **submodels;

        int num_planes;
        mplane_t *data_planes;

        int num_nodes;
        mnode_t *data_nodes;

        // visible leafs, not counting 0 (solid)
        int num_visleafs;
        // number of actual leafs (including 0 which is solid)
        int num_leafs;
        mleaf_t *data_leafs;

        int num_leafbrushes;
        int *data_leafbrushes;

        int num_leafsurfaces;
        int *data_leafsurfaces;

        int num_portals;
        mportal_t *data_portals;

        int num_portalpoints;
        mvertex_t *data_portalpoints;

        int num_brushes;
        q3mbrush_t *data_brushes;

        int num_brushsides;
        q3mbrushside_t *data_brushsides;

        // pvs
        int num_pvsclusters;
        int num_pvsclusterbytes;
        unsigned char *data_pvsclusters;
        // example
        //pvschain = model->brush.data_pvsclusters + mycluster * model->brush.num_pvsclusterbytes;
        //if (pvschain[thatcluster >> 3] & (1 << (thatcluster & 7)))

        // a mesh containing all shadow casting geometry for the whole model (including submodels), portions of this are referenced by each surface's num_firstshadowmeshtriangle
        shadowmesh_t *shadowmesh;

        // common functions
        int (*SuperContentsFromNativeContents)(struct model_s *model, int nativecontents);
        int (*NativeContentsFromSuperContents)(struct model_s *model, int supercontents);
        unsigned char *(*GetPVS)(struct model_s *model, const vec3_t p);
        int (*FatPVS)(struct model_s *model, const vec3_t org, vec_t radius, unsigned char *pvsbuffer, int pvsbufferlength);
        int (*BoxTouchingPVS)(struct model_s *model, const unsigned char *pvs, const vec3_t mins, const vec3_t maxs);
        int (*BoxTouchingLeafPVS)(struct model_s *model, const unsigned char *pvs, const vec3_t mins, const vec3_t maxs);
        int (*BoxTouchingVisibleLeafs)(struct model_s *model, const unsigned char *visibleleafs, const vec3_t mins, const vec3_t maxs);
        int (*FindBoxClusters)(struct model_s *model, const vec3_t mins, const vec3_t maxs, int maxclusters, int *clusterlist);
        void (*LightPoint)(struct model_s *model, const vec3_t p, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal);
        void (*FindNonSolidLocation)(struct model_s *model, const vec3_t in, vec3_t out, vec_t radius);
        mleaf_t *(*PointInLeaf)(struct model_s *model, const float *p);
        // these are actually only found on brushq1, but NULL is handled gracefully
        void (*AmbientSoundLevelsForPoint)(struct model_s *model, const vec3_t p, unsigned char *out, int outsize);
        void (*RoundUpToHullSize)(struct model_s *cmodel, const vec3_t inmins, const vec3_t inmaxs, vec3_t outmins, vec3_t outmaxs);
        // trace a line of sight through this model (returns false if the line if sight is definitely blocked)
        qboolean (*TraceLineOfSight)(struct model_s *model, const vec3_t start, const vec3_t end);

        char skybox[MAX_QPATH];

        rtexture_t *solidskytexture;
        rtexture_t *alphaskytexture;

        qboolean supportwateralpha;

        // QuakeWorld
        int qw_md4sum;
        int qw_md4sum2;
}
model_brush_t;

typedef struct model_brushq1_s
{
        // lightmap format, set to r_lightmaprgba when model is loaded
        int                             lightmaprgba;

        dmodel_t                *submodels;

        int                             numvertexes;
        mvertex_t               *vertexes;

        int                             numedges;
        medge_t                 *edges;

        int                             numtexinfo;
        mtexinfo_t              *texinfo;

        int                             numsurfedges;
        int                             *surfedges;

        int                             numclipnodes;
        dclipnode_t             *clipnodes;

        hull_t                  hulls[MAX_MAP_HULLS];

        int                             num_compressedpvs;
        unsigned char                   *data_compressedpvs;

        int                             num_lightdata;
        unsigned char                   *lightdata;
        unsigned char                   *nmaplightdata; // deluxemap file

        // lightmap update chains for light styles
        int                             light_styles;
        unsigned char                   *light_style;
        int                             *light_stylevalue;
        msurface_t              ***light_styleupdatechains;
        msurface_t              **light_styleupdatechainsbuffer;
}
model_brushq1_t;

/* MSVC can't compile empty structs, so this is commented out for now
typedef struct model_brushq2_s
{
}
model_brushq2_t;
*/

typedef struct model_brushq3_s
{
        int num_models;
        q3dmodel_t *data_models;

        // used only during loading - freed after loading!
        int num_vertices;
        float *data_vertex3f;
        float *data_normal3f;
        float *data_texcoordtexture2f;
        float *data_texcoordlightmap2f;
        float *data_color4f;

        // freed after loading!
        int num_triangles;
        int *data_element3i;

        int num_effects;
        q3deffect_t *data_effects;

        // lightmap textures
        int num_originallightmaps;
        int num_mergedlightmaps;
        int num_lightmapmergepower;
        int num_lightmapmerge;
        rtexture_t **data_lightmaps;
        rtexture_t **data_deluxemaps;

        // voxel light data with directional shading
        int num_lightgrid;
        q3dlightgrid_t *data_lightgrid;
        // size of each cell (may vary by map, typically 64 64 128)
        float num_lightgrid_cellsize[3];
        // 1.0 / num_lightgrid_cellsize
        float num_lightgrid_scale[3];
        // dimensions of the world model in lightgrid cells
        int num_lightgrid_imins[3];
        int num_lightgrid_imaxs[3];
        int num_lightgrid_isize[3];
        // indexing/clamping
        int num_lightgrid_dimensions[3];
        // transform modelspace coordinates to lightgrid index
        matrix4x4_t num_lightgrid_indexfromworld;

        // true if this q3bsp file has been detected as using deluxemapping
        // (lightmap texture pairs, every odd one is never directly refernced,
        //  and contains lighting normals, not colors)
        qboolean deluxemapping;
        // true if the detected deluxemaps are the modelspace kind, rather than
        // the faster tangentspace kind
        qboolean deluxemapping_modelspace;
}
model_brushq3_t;

typedef struct model_s
{
        // name and path of model, for example "progs/player.mdl"
        char                    name[MAX_QPATH];
        // model needs to be loaded if this is false
        qboolean                loaded;
        // set if the model is used in current map, models which are not, are purged
        qboolean                used;
        // true if this is the world model (I.E. defines what sky to use, and may contain submodels)
        qboolean                isworldmodel;
        // CRC of the file this model was loaded from, to reload if changed
        unsigned int    crc;
        // mod_brush, mod_alias, mod_sprite
        modtype_t               type;
        // memory pool for allocations
        mempool_t               *mempool;
        // all models use textures...
        rtexturepool_t  *texturepool;
        // flags from the model file
        int                             flags;
        // engine calculated flags, ones that can not be set in the file
        int                             flags2;
        // number of QC accessible frame(group)s in the model
        int                             numframes;
        // number of QC accessible skin(group)s in the model
        int                             numskins;
        // whether to randomize animated framegroups
        synctype_t              synctype;
        // bounding box at angles '0 0 0'
        vec3_t                  normalmins, normalmaxs;
        // bounding box if yaw angle is not 0, but pitch and roll are
        vec3_t                  yawmins, yawmaxs;
        // bounding box if pitch or roll are used
        vec3_t                  rotatedmins, rotatedmaxs;
        // sphere radius, usable at any angles
        float                   radius;
        // squared sphere radius for easier comparisons
        float                   radius2;
        // skin animation info
        animscene_t             *skinscenes; // [numskins]
        // skin animation info
        animscene_t             *animscenes; // [numframes]
        // range of surface numbers in this (sub)model
        int                             firstmodelsurface;
        int                             nummodelsurfaces;
        // range of collision brush numbers in this (sub)model
        int                             firstmodelbrush;
        int                             nummodelbrushes;
        // list of surface numbers in this (sub)model
        int                             *surfacelist;
        // for md3 models
        int                             num_tags;
        int                             num_tagframes;
        aliastag_t              *data_tags;
        // for skeletal models
        int                             num_bones;
        aliasbone_t             *data_bones;
        int                             num_poses;
        float                   *data_poses;
        float                   *data_basebonepose;
        float                   *data_baseboneposeinverse;
        // textures of this model
        int                             num_textures;
        texture_t               *data_textures;
        // surfaces of this model
        int                             num_surfaces;
        msurface_t              *data_surfaces;
        // optional lightmapinfo data for surface lightmap updates
        msurface_lightmapinfo_t *data_surfaces_lightmapinfo;
        // all surfaces belong to this mesh
        surfmesh_t              surfmesh;
        // draw the model's sky polygons (only used by brush models)
        void(*DrawSky)(struct entity_render_s *ent);
        // draw the model using lightmap/dlight shading
        void(*Draw)(struct entity_render_s *ent);
        // gathers info on which clusters and surfaces are lit by light, as well as calculating a bounding box
        void(*GetLightInfo)(struct entity_render_s *ent, vec3_t relativelightorigin, float lightradius, vec3_t outmins, vec3_t outmaxs, int *outleaflist, unsigned char *outleafpvs, int *outnumleafspointer, int *outsurfacelist, unsigned char *outsurfacepvs, int *outnumsurfacespointer, unsigned char *outshadowtrispvs, unsigned char *outlighttrispvs);
        // compile a shadow volume for the model based on light source
        void(*CompileShadowVolume)(struct entity_render_s *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int numsurfaces, const int *surfacelist);
        // draw a shadow volume for the model based on light source
        void(*DrawShadowVolume)(struct entity_render_s *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int numsurfaces, const int *surfacelist, const vec3_t lightmins, const vec3_t lightmaxs);
        // draw the lighting on a model (through stencil)
        void(*DrawLight)(struct entity_render_s *ent, int numsurfaces, const int *surfacelist, const unsigned char *trispvs);
        // trace a box against this model
        void (*TraceBox)(struct model_s *model, int frame, struct trace_s *trace, const vec3_t start, const vec3_t boxmins, const vec3_t boxmaxs, const vec3_t end, int hitsupercontentsmask);
        // fields belonging to some types of model
        model_sprite_t  sprite;
        model_brush_t   brush;
        model_brushq1_t brushq1;
        /* MSVC can't handle an empty struct, so this is commented out for now
        model_brushq2_t brushq2;
        */
        model_brushq3_t brushq3;
        // skin files can have different tags for each skin
        overridetagnameset_t    *data_overridetagnamesforskin;
        // flags this model for offseting sounds to the model center (used by brush models)
        int soundfromcenter;
}
model_t;

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

// model loading
extern model_t *loadmodel;
extern unsigned char *mod_base;
// sky/water subdivision
//extern cvar_t gl_subdivide_size;
// texture fullbrights
extern cvar_t r_fullbrights;

void Mod_Init (void);
void Mod_Reload (void);
model_t *Mod_LoadModel(model_t *mod, qboolean crash, qboolean checkdisk, qboolean isworldmodel);
model_t *Mod_FindName (const char *name);
model_t *Mod_ForName (const char *name, qboolean crash, qboolean checkdisk, qboolean isworldmodel);
void Mod_UnloadModel (model_t *mod);

void Mod_ClearUsed(void);
void Mod_PurgeUnused(void);
void Mod_RemoveStaleWorldModels(model_t *skip); // only used during loading!

extern model_t *loadmodel;
extern char loadname[32];       // for hunk tags

int Mod_BuildVertexRemapTableFromElements(int numelements, const int *elements, int numvertices, int *remapvertices);
void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles);
void Mod_ValidateElements(int *elements, int numtriangles, int firstvertex, int numverts, const char *filename, int fileline);
void Mod_BuildNormals(int firstvertex, int numvertices, int numtriangles, const float *vertex3f, const int *elements, float *normal3f, qboolean areaweighting);
void Mod_BuildTextureVectorsFromNormals(int firstvertex, int numvertices, int numtriangles, const float *vertex3f, const float *texcoord2f, const float *normal3f, const int *elements, float *svector3f, float *tvector3f, qboolean areaweighting);

void Mod_AllocSurfMesh(mempool_t *mempool, int numvertices, int numtriangles, qboolean lightmapoffsets, qboolean vertexcolors, qboolean neighbors);

shadowmesh_t *Mod_ShadowMesh_Alloc(mempool_t *mempool, int maxverts, int maxtriangles, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, int light, int neighbors, int expandable);
shadowmesh_t *Mod_ShadowMesh_ReAlloc(mempool_t *mempool, shadowmesh_t *oldmesh, int light, int neighbors);
int Mod_ShadowMesh_AddVertex(shadowmesh_t *mesh, float *vertex14f);
void Mod_ShadowMesh_AddTriangle(mempool_t *mempool, shadowmesh_t *mesh, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, float *vertex14f);
void Mod_ShadowMesh_AddMesh(mempool_t *mempool, shadowmesh_t *mesh, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, const float *vertex3f, const float *svector3f, const float *tvector3f, const float *normal3f, const float *texcoord2f, int numtris, const int *element3i);
shadowmesh_t *Mod_ShadowMesh_Begin(mempool_t *mempool, int maxverts, int maxtriangles, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, int light, int neighbors, int expandable);
shadowmesh_t *Mod_ShadowMesh_Finish(mempool_t *mempool, shadowmesh_t *firstmesh, qboolean light, qboolean neighbors, qboolean createvbo);
void Mod_ShadowMesh_CalcBBox(shadowmesh_t *firstmesh, vec3_t mins, vec3_t maxs, vec3_t center, float *radius);
void Mod_ShadowMesh_Free(shadowmesh_t *mesh);

int Mod_LoadSkinFrame(skinframe_t *skinframe, const char *basename, int textureflags, int loadpantsandshirt, int loadglowtexture);
int Mod_LoadSkinFrame_Internal(skinframe_t *skinframe, const char *basename, int textureflags, int loadpantsandshirt, int loadglowtexture, const unsigned char *skindata, int width, int height, int bitsperpixel, const unsigned int *palette, const unsigned int *alphapalette);

extern cvar_t r_mipskins;

typedef struct skinfileitem_s
{
        struct skinfileitem_s *next;
        char name[MAX_QPATH];
        char replacement[MAX_QPATH];
}
skinfileitem_t;

typedef struct skinfile_s
{
        struct skinfile_s *next;
        skinfileitem_t *items;
}
skinfile_t;

skinfile_t *Mod_LoadSkinFiles(void);
void Mod_FreeSkinFiles(skinfile_t *skinfile);
int Mod_CountSkinFiles(skinfile_t *skinfile);

void Mod_SnapVertices(int numcomponents, int numvertices, float *vertices, float snap);
int Mod_RemoveDegenerateTriangles(int numtriangles, const int *inelement3i, int *outelement3i, const float *vertex3f);
void Mod_VertexRangeFromElements(int numelements, const int *elements, int *firstvertexpointer, int *lastvertexpointer);

// bsp models
void Mod_BrushInit(void);
// used for talking to the QuakeC mainly
int Mod_Q1BSP_NativeContentsFromSuperContents(struct model_s *model, int supercontents);
int Mod_Q1BSP_SuperContentsFromNativeContents(struct model_s *model, int nativecontents);

// a lot of model formats use the Q1BSP code, so here are the prototypes...
struct entity_render_s;
void R_Q1BSP_DrawSky(struct entity_render_s *ent);
void R_Q1BSP_Draw(struct entity_render_s *ent);
void R_Q1BSP_GetLightInfo(struct entity_render_s *ent, vec3_t relativelightorigin, float lightradius, vec3_t outmins, vec3_t outmaxs, int *outleaflist, unsigned char *outleafpvs, int *outnumleafspointer, int *outsurfacelist, unsigned char *outsurfacepvs, int *outnumsurfacespointer, unsigned char *outshadowtrispvs, unsigned char *outlighttrispvs);
void R_Q1BSP_CompileShadowVolume(struct entity_render_s *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int numsurfaces, const int *surfacelist);
void R_Q1BSP_DrawShadowVolume(struct entity_render_s *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int numsurfaces, const int *surfacelist, const vec3_t lightmins, const vec3_t lightmaxs);
void R_Q1BSP_DrawLight(struct entity_render_s *ent, int numsurfaces, const int *surfacelist, const unsigned char *trispvs);

// alias models
struct frameblend_s;
void Mod_AliasInit(void);
void Mod_Alias_GetMesh_Vertices(const model_t *model, const struct frameblend_s *frameblend, float *vertex3f, float *normal3f, float *svector3f, float *tvector3f);
int Mod_Alias_GetTagMatrix(const model_t *model, int poseframe, int tagindex, matrix4x4_t *outmatrix);
int Mod_Alias_GetTagIndexForName(const model_t *model, unsigned int skin, const char *tagname);

// sprite models
void Mod_SpriteInit(void);

// loaders
void Mod_Q1BSP_Load(model_t *mod, void *buffer, void *bufferend);
void Mod_IBSP_Load(model_t *mod, void *buffer, void *bufferend);
void Mod_MAP_Load(model_t *mod, void *buffer, void *bufferend);
void Mod_IDP0_Load(model_t *mod, void *buffer, void *bufferend);
void Mod_IDP2_Load(model_t *mod, void *buffer, void *bufferend);
void Mod_IDP3_Load(model_t *mod, void *buffer, void *bufferend);
void Mod_ZYMOTICMODEL_Load(model_t *mod, void *buffer, void *bufferend);
void Mod_DARKPLACESMODEL_Load(model_t *mod, void *buffer, void *bufferend);
void Mod_PSKMODEL_Load(model_t *mod, void *buffer, void *bufferend);
void Mod_IDSP_Load(model_t *mod, void *buffer, void *bufferend);
void Mod_IDS2_Load(model_t *mod, void *buffer, void *bufferend);

// utility
qboolean Mod_CanSeeBox_Trace(int numsamples, float t, model_t *model, vec3_t eye, vec3_t minsX, vec3_t maxsX);

#endif  // MODEL_SHARED_H