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
  11 // must match NUMCROSSHAIRS in gl_draw.c
  12 #define NUMCROSSHAIRS 5
  13
  14 static qbyte *crosshairtexdata[NUMCROSSHAIRS] =
  15 {
  16         "................"
  17         "................"
  18         "................"
  19         "...33......33..."
  20         "...355....553..."
  21         "....577..775...."
  22         ".....77..77....."
  23         "................"
  24         "................"
  25         ".....77..77....."
  26         "....577..775...."
  27         "...355....553..."
  28         "...33......33..."
  29         "................"
  30         "................"
  31         "................"
  32         ,
  33         "................"
  34         "................"
  35         "................"
  36         "...3........3..."
  37         "....5......5...."
  38         ".....7....7....."
  39         "......7..7......"
  40         "................"
  41         "................"
  42         "......7..7......"
  43         ".....7....7....."
  44         "....5......5...."
  45         "...3........3..."
  46         "................"
  47         "................"
  48         "................"
  49         ,
  50         "................"
  51         ".......77......."
  52         ".......77......."
  53         "................"
  54         "................"
  55         ".......44......."
  56         ".......44......."
  57         ".77..44..44..77."
  58         ".77..44..44..77."
  59         ".......44......."
  60         ".......44......."
  61         "................"
  62         ".......77......."
  63         ".......77......."
  64         "................"
  65         "................"
  66         ,
  67         "................"
  68         "................"
  69         "................"
  70         "................"
  71         "................"
  72         "................"
  73         "................"
  74         "................"
  75         "........7777777."
  76         "........752....."
  77         "........72......"
  78         "........7......."
  79         "........7......."
  80         "........7......."
  81         "................"
  82         "................"
  83         ,
  84         "................"
  85         "................"
  86         "................"
  87         "................"
  88         "................"
  89         "........7......."
  90         "................"
  91         "........4......."
  92         ".....7.4.4.7...."
  93         "........4......."
  94         "................"
  95         "........7......."
  96         "................"
  97         "................"
  98         "................"
  99         "................"
 100 };
 101
 102 rtexturepool_t *crosshairtexturepool;
 103 rtexture_t *crosshairtexture[NUMCROSSHAIRS];
 104
 105 void r_crosshairs_start(void)
 106 {
 107         int num;
 108         int i;
 109         char *in;
 110         qbyte data[16*16][4];
 111         crosshairtexturepool = R_AllocTexturePool();
 112         for (num = 0;num < 5;num++)
 113         {
 114                 in = crosshairtexdata[num];
 115                 for (i = 0;i < 16*16;i++)
 116                 {
 117                         if (in[i] == '.')
 118                         {
 119                                 data[i][0] = 255;
 120                                 data[i][1] = 255;
 121                                 data[i][2] = 255;
 122                                 data[i][3] = 0;
 123                         }
 124                         else
 125                         {
 126                                 data[i][0] = 255;
 127                                 data[i][1] = 255;
 128                                 data[i][2] = 255;
 129                                 data[i][3] = (qbyte) ((int) (in[i] - '0') * 255 / 7);
 130                         }
 131                 }
 132                 crosshairtexture[num] = R_LoadTexture(crosshairtexturepool, va("crosshair%i", num), 16, 16, &data[0][0], TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE);
 133         }
 134 }
 135
 136 void r_crosshairs_shutdown(void)
 137 {
 138         R_FreeTexturePool(&crosshairtexturepool);
 139 }
 140
 141 void r_crosshairs_newmap(void)
 142 {
 143 }
 144
 145 void R_Crosshairs_Init(void)
 146 {
 147         Cvar_RegisterVariable(&crosshair_brightness);
 148         Cvar_RegisterVariable(&crosshair_alpha);
 149         Cvar_RegisterVariable(&crosshair_flashspeed);
 150         Cvar_RegisterVariable(&crosshair_flashrange);
 151         Cvar_RegisterVariable(&crosshair_size);
 152         R_RegisterModule("R_Crosshair", r_crosshairs_start, r_crosshairs_shutdown, r_crosshairs_newmap);
 153 }
 154
 155 /*
 156 void DrawCrosshair(int num)
 157 {
 158         int i;
 159         qbyte *color;
 160         float scale, base;
 161         char *picname;
 162         cachepic_t *pic;
 163         if (num < 0 || num >= NUMCROSSHAIRS)
 164                 num = 0;
 165         if (cl.viewentity >= 1 && cl.viewentity <= cl.maxclients)
 166         {
 167                 i = (cl.scores[cl.viewentity-1].colors & 0xF) << 4;
 168                 if (i >= 208 && i < 224) // blue
 169                         i += 8;
 170                 else if (i < 128 || i >= 224) // 128-224 are backwards ranges (bright to dark, rather than dark to bright)
 171                         i += 15;
 172         }
 173         else
 174                 i = 15;
 175         color = (qbyte *) &d_8to24table[i];
 176         if (crosshair_flashspeed.value >= 0.01f)
 177                 base = (sin(realtime * crosshair_flashspeed.value * (M_PI*2.0f)) * crosshair_flashrange.value);
 178         else
 179                 base = 0.0f;
 180         scale = crosshair_brightness.value * (1.0f / 255.0f);
 181         picname = va("gfx/crosshair%i.tga", num + 1);
 182         pic = Draw_CachePic(picname);
 183         if (pic)
 184                 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);
 185 }
 186 */
 187
 188 void R_DrawCrosshairSprite(rtexture_t *texture, vec3_t origin, vec_t scale, float cr, float cg, float cb, float ca)
 189 {
 190         rmeshbufferinfo_t m;
 191         float diff[3];
 192
 193         if (fogenabled)
 194         {
 195                 VectorSubtract(origin, r_origin, diff);
 196                 ca *= 1 - exp(fogdensity/DotProduct(diff,diff));
 197         }
 198
 199         memset(&m, 0, sizeof(m));
 200         m.transparent = false;
 201         m.blendfunc1 = GL_SRC_ALPHA;
 202         m.blendfunc2 = GL_ONE;
 203         m.depthdisable = true;
 204         m.numtriangles = 2;
 205         m.numverts = 4;
 206         m.tex[0] = R_GetTexture(texture);
 207         if (R_Mesh_Draw_GetBuffer(&m))
 208         {
 209                 m.index[0] = 0;
 210                 m.index[1] = 1;
 211                 m.index[2] = 2;
 212                 m.index[3] = 0;
 213                 m.index[4] = 2;
 214                 m.index[5] = 3;
 215                 m.color[0] = m.color[4] = m.color[8] = m.color[12] = cr * m.colorscale;
 216                 m.color[1] = m.color[5] = m.color[9] = m.color[13] = cg * m.colorscale;
 217                 m.color[2] = m.color[6] = m.color[10] = m.color[14] = cb * m.colorscale;
 218                 m.color[3] = m.color[7] = m.color[11] = m.color[15] = ca * m.colorscale;
 219                 m.texcoords[0][0] = 0;
 220                 m.texcoords[0][1] = 0;
 221                 m.texcoords[0][2] = 0;
 222                 m.texcoords[0][3] = 1;
 223                 m.texcoords[0][4] = 1;
 224                 m.texcoords[0][5] = 1;
 225                 m.texcoords[0][6] = 1;
 226                 m.texcoords[0][7] = 0;
 227                 m.vertex[0] = origin[0] - vright[0] * scale - vup[0] * scale;
 228                 m.vertex[1] = origin[1] - vright[1] * scale - vup[1] * scale;
 229                 m.vertex[2] = origin[2] - vright[2] * scale - vup[2] * scale;
 230                 m.vertex[4] = origin[0] - vright[0] * scale + vup[0] * scale;
 231                 m.vertex[5] = origin[1] - vright[1] * scale + vup[1] * scale;
 232                 m.vertex[6] = origin[2] - vright[2] * scale + vup[2] * scale;
 233                 m.vertex[8] = origin[0] + vright[0] * scale + vup[0] * scale;
 234                 m.vertex[9] = origin[1] + vright[1] * scale + vup[1] * scale;
 235                 m.vertex[10] = origin[2] + vright[2] * scale + vup[2] * scale;
 236                 m.vertex[12] = origin[0] + vright[0] * scale - vup[0] * scale;
 237                 m.vertex[13] = origin[1] + vright[1] * scale - vup[1] * scale;
 238                 m.vertex[14] = origin[2] + vright[2] * scale - vup[2] * scale;
 239         }
 240 }
 241
 242 void R_DrawCrosshair(void)
 243 {
 244         int i, num;
 245         qbyte *color;
 246         float scale, base;
 247         vec3_t v1, v2, spriteorigin;
 248         vec_t spritescale;
 249         float cr, cg, cb, ca;
 250         num = crosshair.integer - 1;
 251         if (num < 0)
 252                 return;
 253         if (num >= NUMCROSSHAIRS)
 254                 num = 0;
 255         if (cl.viewentity >= 1 && cl.viewentity <= cl.maxclients)
 256         {
 257                 i = (cl.scores[cl.viewentity-1].colors & 0xF) << 4;
 258                 if (i >= 208 && i < 224) // blue
 259                         i += 8;
 260                 else if (i < 128 || i >= 224) // 128-224 are backwards ranges (bright to dark, rather than dark to bright)
 261                         i += 15;
 262         }
 263         else
 264                 i = 15;
 265         color = (qbyte *) &d_8to24table[i];
 266         if (crosshair_flashspeed.value >= 0.01f)
 267                 base = (sin(realtime * crosshair_flashspeed.value * (M_PI*2.0f)) * crosshair_flashrange.value);
 268         else
 269                 base = 0.0f;
 270         scale = crosshair_brightness.value * (1.0f / 255.0f);
 271         //picname = va("gfx/crosshair%i.tga", num + 1);
 272         //pic = Draw_CachePic(picname);
 273         //if (pic)
 274         //      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);
 275         {
 276                 // trace the shot path up to a certain distance
 277                 VectorCopy(cl_entities[cl.viewentity].render.origin, v1);
 278                 v1[2] += 16; // HACK: this depends on the QC
 279                 // get the forward vector for the gun (not the view)
 280                 AngleVectors(cl.viewangles, v2, NULL, NULL);
 281                 //VectorCopy(r_origin, v1);
 282                 VectorMA(v1, 8192, v2, v2);
 283                 spritescale = 4.0f + (CL_TraceLine(v1, v2, spriteorigin, NULL, 0, true) * 8192.0f) * (1.0f / 48.0f);
 284                 spritescale = bound(0.0f, spritescale, 32.0f);
 285                 //VectorMA(spriteorigin, -4, vpn, spriteorigin);
 286
 287                 cr = color[0] * scale + base;
 288                 cg = color[1] * scale + base;
 289                 cb = color[2] * scale + base;
 290                 ca = crosshair_alpha.value;
 291
 292                 // clamp the colors so they don't go negative
 293                 cr = max(0, cr);
 294                 cg = max(0, cg);
 295                 cb = max(0, cb);
 296                 // might as well clamp the alpha
 297                 ca = bound(0, ca, 1.0f);
 298
 299                 // finally draw the sprite
 300                 R_DrawCrosshairSprite(crosshairtexture[num], spriteorigin, spritescale, cr, cg, cb, ca);
 301         }
 302 }
 303
 304