r_crosshairs.c

   1
   2 #include "quakedef.h"
   3 #include "cl_collision.h"
   4
   5 cvar_t crosshair_brightness = {CVAR_SAVE, "crosshair_brightness", "1"};
   6 cvar_t crosshair_alpha = {CVAR_SAVE, "crosshair_alpha", "1"};
   7 cvar_t crosshair_flashspeed = {CVAR_SAVE, "crosshair_flashspeed", "2"};
   8 cvar_t crosshair_flashrange = {CVAR_SAVE, "crosshair_flashrange", "0.1"};
   9 cvar_t crosshair_size = {CVAR_SAVE, "crosshair_size", "1"};
  10 cvar_t crosshair_static = {CVAR_SAVE, "crosshair_static", "0"};
  11
  12 // must match NUMCROSSHAIRS in gl_draw.c
  13 #define NUMCROSSHAIRS 5
  14
  15 static qbyte *crosshairtexdata[NUMCROSSHAIRS] =
  16 {
  17         "................"
  18         "................"
  19         "................"
  20         "...33......33..."
  21         "...355....553..."
  22         "....577..775...."
  23         ".....77..77....."
  24         "................"
  25         "................"
  26         ".....77..77....."
  27         "....577..775...."
  28         "...355....553..."
  29         "...33......33..."
  30         "................"
  31         "................"
  32         "................"
  33         ,
  34         "................"
  35         "................"
  36         "................"
  37         "...3........3..."
  38         "....5......5...."
  39         ".....7....7....."
  40         "......7..7......"
  41         "................"
  42         "................"
  43         "......7..7......"
  44         ".....7....7....."
  45         "....5......5...."
  46         "...3........3..."
  47         "................"
  48         "................"
  49         "................"
  50         ,
  51         "................"
  52         ".......77......."
  53         ".......77......."
  54         "................"
  55         "................"
  56         ".......44......."
  57         ".......44......."
  58         ".77..44..44..77."
  59         ".77..44..44..77."
  60         ".......44......."
  61         ".......44......."
  62         "................"
  63         ".......77......."
  64         ".......77......."
  65         "................"
  66         "................"
  67         ,
  68         "................"
  69         "................"
  70         "................"
  71         "................"
  72         "................"
  73         "................"
  74         "................"
  75         "................"
  76         "........7777777."
  77         "........752....."
  78         "........72......"
  79         "........7......."
  80         "........7......."
  81         "........7......."
  82         "................"
  83         "................"
  84         ,
  85         "................"
  86         "................"
  87         "................"
  88         "................"
  89         "................"
  90         "........7......."
  91         "................"
  92         "........4......."
  93         ".....7.4.4.7...."
  94         "........4......."
  95         "................"
  96         "........7......."
  97         "................"
  98         "................"
  99         "................"
 100         "................"
 101 };
 102
 103 rtexturepool_t *crosshairtexturepool;
 104 rtexture_t *crosshairtexture[NUMCROSSHAIRS];
 105
 106 void r_crosshairs_start(void)
 107 {
 108         int num;
 109         int i;
 110         char *in;
 111         qbyte data[16*16][4];
 112         crosshairtexturepool = R_AllocTexturePool();
 113         for (num = 0;num < 5;num++)
 114         {
 115                 in = crosshairtexdata[num];
 116                 for (i = 0;i < 16*16;i++)
 117                 {
 118                         if (in[i] == '.')
 119                         {
 120                                 data[i][0] = 255;
 121                                 data[i][1] = 255;
 122                                 data[i][2] = 255;
 123                                 data[i][3] = 0;
 124                         }
 125                         else
 126                         {
 127                                 data[i][0] = 255;
 128                                 data[i][1] = 255;
 129                                 data[i][2] = 255;
 130                                 data[i][3] = (qbyte) ((int) (in[i] - '0') * 255 / 7);
 131                         }
 132                 }
 133                 crosshairtexture[num] = R_LoadTexture(crosshairtexturepool, va("crosshair%i", num), 16, 16, &data[0][0], TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE);
 134         }
 135 }
 136
 137 void r_crosshairs_shutdown(void)
 138 {
 139         R_FreeTexturePool(&crosshairtexturepool);
 140 }
 141
 142 void r_crosshairs_newmap(void)
 143 {
 144 }
 145
 146 void R_Crosshairs_Init(void)
 147 {
 148         Cvar_RegisterVariable(&crosshair_brightness);
 149         Cvar_RegisterVariable(&crosshair_alpha);
 150         Cvar_RegisterVariable(&crosshair_flashspeed);
 151         Cvar_RegisterVariable(&crosshair_flashrange);
 152         Cvar_RegisterVariable(&crosshair_size);
 153         Cvar_RegisterVariable(&crosshair_static);
 154         R_RegisterModule("R_Crosshair", r_crosshairs_start, r_crosshairs_shutdown, r_crosshairs_newmap);
 155 }
 156
 157 void R_DrawCrosshairSprite(rtexture_t *texture, vec3_t origin, vec_t scale, float cr, float cg, float cb, float ca)
 158 {
 159         rmeshbufferinfo_t m;
 160         float diff[3];
 161
 162         if (fogenabled)
 163         {
 164                 VectorSubtract(origin, r_origin, diff);
 165                 ca *= 1 - exp(fogdensity/DotProduct(diff,diff));
 166         }
 167
 168         memset(&m, 0, sizeof(m));
 169         m.blendfunc1 = GL_SRC_ALPHA;
 170         m.blendfunc2 = GL_ONE;
 171         m.depthdisable = true;
 172         m.numtriangles = 2;
 173         m.numverts = 4;
 174         m.tex[0] = R_GetTexture(texture);
 175         if (R_Mesh_Draw_GetBuffer(&m, false))
 176         {
 177                 m.index[0] = 0;
 178                 m.index[1] = 1;
 179                 m.index[2] = 2;
 180                 m.index[3] = 0;
 181                 m.index[4] = 2;
 182                 m.index[5] = 3;
 183                 m.color[0] = m.color[4] = m.color[8] = m.color[12] = cr * m.colorscale;
 184                 m.color[1] = m.color[5] = m.color[9] = m.color[13] = cg * m.colorscale;
 185                 m.color[2] = m.color[6] = m.color[10] = m.color[14] = cb * m.colorscale;
 186                 m.color[3] = m.color[7] = m.color[11] = m.color[15] = ca;
 187                 m.texcoords[0][0] = 0;
 188                 m.texcoords[0][1] = 0;
 189                 m.texcoords[0][2] = 0;
 190                 m.texcoords[0][3] = 1;
 191                 m.texcoords[0][4] = 1;
 192                 m.texcoords[0][5] = 1;
 193                 m.texcoords[0][6] = 1;
 194                 m.texcoords[0][7] = 0;
 195                 m.vertex[0] = origin[0] - vright[0] * scale - vup[0] * scale;
 196                 m.vertex[1] = origin[1] - vright[1] * scale - vup[1] * scale;
 197                 m.vertex[2] = origin[2] - vright[2] * scale - vup[2] * scale;
 198                 m.vertex[4] = origin[0] - vright[0] * scale + vup[0] * scale;
 199                 m.vertex[5] = origin[1] - vright[1] * scale + vup[1] * scale;
 200                 m.vertex[6] = origin[2] - vright[2] * scale + vup[2] * scale;
 201                 m.vertex[8] = origin[0] + vright[0] * scale + vup[0] * scale;
 202                 m.vertex[9] = origin[1] + vright[1] * scale + vup[1] * scale;
 203                 m.vertex[10] = origin[2] + vright[2] * scale + vup[2] * scale;
 204                 m.vertex[12] = origin[0] + vright[0] * scale - vup[0] * scale;
 205                 m.vertex[13] = origin[1] + vright[1] * scale - vup[1] * scale;
 206                 m.vertex[14] = origin[2] + vright[2] * scale - vup[2] * scale;
 207                 R_Mesh_Render();
 208         }
 209 }
 210
 211 void R_DrawCrosshair(void)
 212 {
 213         int i, num;
 214         qbyte *color;
 215         float scale, base;
 216         vec3_t v1, v2, spriteorigin;
 217         vec_t spritescale;
 218         float cr, cg, cb, ca;
 219         num = crosshair.integer - 1;
 220         if (num < 0 || cl.intermission)
 221                 return;
 222         if (num >= NUMCROSSHAIRS)
 223                 num = 0;
 224         if (cl.viewentity >= 1 && cl.viewentity <= cl.maxclients)
 225         {
 226                 i = (cl.scores[cl.viewentity-1].colors & 0xF) << 4;
 227                 if (i >= 208 && i < 224) // blue
 228                         i += 8;
 229                 else if (i < 128 || i >= 224) // 128-224 are backwards ranges (bright to dark, rather than dark to bright)
 230                         i += 15;
 231         }
 232         else
 233                 i = 15;
 234         color = (qbyte *) &d_8to24table[i];
 235         if (crosshair_flashspeed.value >= 0.01f)
 236                 base = (sin(realtime * crosshair_flashspeed.value * (M_PI*2.0f)) * crosshair_flashrange.value);
 237         else
 238                 base = 0.0f;
 239         scale = crosshair_brightness.value * (1.0f / 255.0f);
 240
 241         if (crosshair_static.integer)
 242         {
 243                 char *picname;
 244                 cachepic_t *pic;
 245
 246                 picname = va("gfx/crosshair%i.tga", num + 1);
 247                 pic = Draw_CachePic(picname);
 248                 if (pic)
 249                         DrawQ_Pic((vid.conwidth - pic->width * crosshair_size.value) * 0.5f, (vid.conheight - pic->height * crosshair_size.value) * 0.5f, picname, pic->width * crosshair_size.value, pic->height * crosshair_size.value, color[0] * scale + base, color[1] * scale + base, color[2] * scale + base, crosshair_alpha.value, 0);
 250         }
 251         else
 252         {
 253                 // trace the shot path up to a certain distance
 254                 VectorCopy(cl_entities[cl.viewentity].render.origin, v1);
 255                 v1[2] += 16; // HACK: this depends on the QC
 256                 // get the forward vector for the gun (not the view)
 257                 AngleVectors(cl.viewangles, v2, NULL, NULL);
 258                 //VectorCopy(r_origin, v1);
 259                 VectorMA(v1, 8192, v2, v2);
 260                 spritescale = 4.0f + (CL_TraceLine(v1, v2, spriteorigin, NULL, 0, true) * 8192.0f) * (1.0f / 48.0f);
 261                 spritescale = bound(0.0f, spritescale, 32.0f);
 262                 //VectorMA(spriteorigin, -4, vpn, spriteorigin);
 263
 264                 cr = color[0] * scale + base;
 265                 cg = color[1] * scale + base;
 266                 cb = color[2] * scale + base;
 267                 ca = crosshair_alpha.value;
 268
 269                 // clamp the colors so they don't go negative
 270                 cr = max(0, cr);
 271                 cg = max(0, cg);
 272                 cb = max(0, cb);
 273                 // might as well clamp the alpha
 274                 ca = bound(0, ca, 1.0f);
 275
 276                 // finally draw the sprite
 277                 R_DrawCrosshairSprite(crosshairtexture[num], spriteorigin, spritescale, cr, cg, cb, ca);
 278         }
 279 }
 280
 281