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 void R_Crosshairs_Init(void)
  16 {
  17         Cvar_RegisterVariable(&crosshair_brightness);
  18         Cvar_RegisterVariable(&crosshair_alpha);
  19         Cvar_RegisterVariable(&crosshair_flashspeed);
  20         Cvar_RegisterVariable(&crosshair_flashrange);
  21         Cvar_RegisterVariable(&crosshair_size);
  22         Cvar_RegisterVariable(&crosshair_static);
  23 }
  24
  25 void R_DrawCrosshairSprite(rtexture_t *texture, vec3_t origin, vec_t scale, float cr, float cg, float cb, float ca)
  26 {
  27         rmeshstate_t m;
  28         float diff[3];
  29
  30         if (fogenabled)
  31         {
  32                 VectorSubtract(origin, r_origin, diff);
  33                 ca *= 1 - exp(fogdensity/DotProduct(diff,diff));
  34         }
  35
  36         memset(&m, 0, sizeof(m));
  37         m.blendfunc1 = GL_SRC_ALPHA;
  38         m.blendfunc2 = GL_ONE;
  39         m.depthdisable = true;
  40         m.tex[0] = R_GetTexture(texture);
  41         R_Mesh_Matrix(&r_identitymatrix);
  42         R_Mesh_State(&m);
  43
  44         GL_Color(cr * r_colorscale, cg * r_colorscale, cb * r_colorscale, ca);
  45         R_DrawSpriteMesh(origin, vright, vup, scale, -scale, -scale, scale);
  46 }
  47
  48 void R_GetCrosshairColor(float *out)
  49 {
  50         int i;
  51         qbyte *color;
  52         float scale, base;
  53         if (cl.viewentity >= 1 && cl.viewentity <= cl.maxclients)
  54         {
  55                 i = (cl.scores[cl.viewentity-1].colors & 0xF) << 4;
  56                 if (i >= 208 && i < 224) // blue
  57                         i += 8;
  58                 else if (i < 128 || i >= 224) // 128-224 are backwards ranges (bright to dark, rather than dark to bright)
  59                         i += 15;
  60         }
  61         else
  62                 i = 15;
  63         color = (qbyte *) &palette_complete[i];
  64         if (crosshair_flashspeed.value >= 0.01f)
  65                 base = (sin(realtime * crosshair_flashspeed.value * (M_PI*2.0f)) * crosshair_flashrange.value);
  66         else
  67                 base = 0.0f;
  68         scale = crosshair_brightness.value * (1.0f / 255.0f);
  69         out[0] = color[0] * scale + base;
  70         out[1] = color[1] * scale + base;
  71         out[2] = color[2] * scale + base;
  72         out[3] = crosshair_alpha.value;
  73
  74         // clamp the colors and alpha
  75         out[0] = bound(0, out[0], 1);
  76         out[1] = bound(0, out[1], 1);
  77         out[2] = bound(0, out[2], 1);
  78         out[3] = bound(0, out[3], 1.0f);
  79 }
  80
  81 void R_DrawWorldCrosshair(void)
  82 {
  83         int num;
  84         cachepic_t *pic;
  85         vec3_t v1, v2, spriteorigin;
  86         vec_t spritescale;
  87         vec4_t color;
  88         if (crosshair_static.integer)
  89                 return;
  90         num = crosshair.integer;
  91         if (num < 1 || num > NUMCROSSHAIRS || cl.intermission)
  92                 return;
  93         if (!cl.viewentity || !cl_entities[cl.viewentity].state_current.active)
  94                 return;
  95         pic = Draw_CachePic(va("gfx/crosshair%i.tga", num));
  96         if (!pic)
  97                 return;
  98         R_GetCrosshairColor(color);
  99
 100         // trace the shot path up to a certain distance
 101         VectorCopy(cl_entities[cl.viewentity].render.origin, v1);
 102         v1[2] += 16; // HACK: this depends on the QC
 103
 104         // get the forward vector for the gun (not the view)
 105         AngleVectors(cl.viewangles, v2, NULL, NULL);
 106         //VectorCopy(r_origin, v1);
 107         VectorMA(v1, 8192, v2, v2);
 108         spritescale = CL_TraceLine(v1, v2, spriteorigin, NULL, 0, true, NULL) * (8192.0f / 40.0f) * crosshair_size.value;
 109
 110         // draw the sprite
 111         R_DrawCrosshairSprite(pic->tex, spriteorigin, spritescale, color[0], color[1], color[2], color[3]);
 112 }
 113
 114 void R_Draw2DCrosshair(void)
 115 {
 116         int num;
 117         cachepic_t *pic;
 118         vec4_t color;
 119         if (!crosshair_static.integer)
 120                 return;
 121         num = crosshair.integer;
 122         if (num < 1 || num > NUMCROSSHAIRS || cl.intermission)
 123                 return;
 124         if (!cl.viewentity || !cl_entities[cl.viewentity].state_current.active)
 125                 return;
 126         pic = Draw_CachePic(va("gfx/crosshair%i.tga", num));
 127         if (pic)
 128         {
 129                 R_GetCrosshairColor(color);
 130                 DrawQ_Pic((vid.conwidth - pic->width * crosshair_size.value) * 0.5f, (vid.conheight - pic->height * crosshair_size.value) * 0.5f, pic->name, pic->width * crosshair_size.value, pic->height * crosshair_size.value, color[0], color[1], color[2], color[3], 0);
 131         }
 132 }
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