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         varray_texcoord[0][ 0] = 0;varray_texcoord[0][ 1] = 0;
  46         varray_texcoord[0][ 4] = 0;varray_texcoord[0][ 5] = 1;
  47         varray_texcoord[0][ 8] = 1;varray_texcoord[0][ 9] = 1;
  48         varray_texcoord[0][12] = 1;varray_texcoord[0][13] = 0;
  49         varray_vertex[0] = origin[0] - vright[0] * scale - vup[0] * scale;
  50         varray_vertex[1] = origin[1] - vright[1] * scale - vup[1] * scale;
  51         varray_vertex[2] = origin[2] - vright[2] * scale - vup[2] * scale;
  52         varray_vertex[4] = origin[0] - vright[0] * scale + vup[0] * scale;
  53         varray_vertex[5] = origin[1] - vright[1] * scale + vup[1] * scale;
  54         varray_vertex[6] = origin[2] - vright[2] * scale + vup[2] * scale;
  55         varray_vertex[8] = origin[0] + vright[0] * scale + vup[0] * scale;
  56         varray_vertex[9] = origin[1] + vright[1] * scale + vup[1] * scale;
  57         varray_vertex[10] = origin[2] + vright[2] * scale + vup[2] * scale;
  58         varray_vertex[12] = origin[0] + vright[0] * scale - vup[0] * scale;
  59         varray_vertex[13] = origin[1] + vright[1] * scale - vup[1] * scale;
  60         varray_vertex[14] = origin[2] + vright[2] * scale - vup[2] * scale;
  61         R_Mesh_Draw(4, 2, polygonelements);
  62 }
  63
  64 void R_GetCrosshairColor(float *out)
  65 {
  66         int i;
  67         qbyte *color;
  68         float scale, base;
  69         if (cl.viewentity >= 1 && cl.viewentity <= cl.maxclients)
  70         {
  71                 i = (cl.scores[cl.viewentity-1].colors & 0xF) << 4;
  72                 if (i >= 208 && i < 224) // blue
  73                         i += 8;
  74                 else if (i < 128 || i >= 224) // 128-224 are backwards ranges (bright to dark, rather than dark to bright)
  75                         i += 15;
  76         }
  77         else
  78                 i = 15;
  79         color = (qbyte *) &d_8to24table[i];
  80         if (crosshair_flashspeed.value >= 0.01f)
  81                 base = (sin(realtime * crosshair_flashspeed.value * (M_PI*2.0f)) * crosshair_flashrange.value);
  82         else
  83                 base = 0.0f;
  84         scale = crosshair_brightness.value * (1.0f / 255.0f);
  85         out[0] = color[0] * scale + base;
  86         out[1] = color[1] * scale + base;
  87         out[2] = color[2] * scale + base;
  88         out[3] = crosshair_alpha.value;
  89
  90         // clamp the colors and alpha
  91         out[0] = bound(0, out[0], 1);
  92         out[1] = bound(0, out[1], 1);
  93         out[2] = bound(0, out[2], 1);
  94         out[3] = bound(0, out[3], 1.0f);
  95 }
  96
  97 void R_DrawWorldCrosshair(void)
  98 {
  99         int num;
 100         cachepic_t *pic;
 101         vec3_t v1, v2, spriteorigin;
 102         vec_t spritescale;
 103         vec4_t color;
 104         if (crosshair_static.integer)
 105                 return;
 106         num = crosshair.integer;
 107         if (num < 1 || num > NUMCROSSHAIRS || cl.intermission)
 108                 return;
 109         if (!cl.viewentity || !cl_entities[cl.viewentity].state_current.active)
 110                 return;
 111         pic = Draw_CachePic(va("gfx/crosshair%i.tga", num + 1));
 112         if (!pic)
 113                 return;
 114         R_GetCrosshairColor(color);
 115
 116         // trace the shot path up to a certain distance
 117         VectorCopy(cl_entities[cl.viewentity].render.origin, v1);
 118         v1[2] += 16; // HACK: this depends on the QC
 119
 120         // get the forward vector for the gun (not the view)
 121         AngleVectors(cl.viewangles, v2, NULL, NULL);
 122         //VectorCopy(r_origin, v1);
 123         VectorMA(v1, 8192, v2, v2);
 124         spritescale = CL_TraceLine(v1, v2, spriteorigin, NULL, 0, true, NULL) * (8192.0f / 40.0f) * crosshair_size.value;
 125
 126         // draw the sprite
 127         R_DrawCrosshairSprite(pic->tex, spriteorigin, spritescale, color[0], color[1], color[2], color[3]);
 128 }
 129
 130 void R_Draw2DCrosshair(void)
 131 {
 132         int num;
 133         cachepic_t *pic;
 134         vec4_t color;
 135         if (!crosshair_static.integer)
 136                 return;
 137         num = crosshair.integer;
 138         if (num < 1 || num > NUMCROSSHAIRS || cl.intermission)
 139                 return;
 140         R_GetCrosshairColor(color);
 141         pic = Draw_CachePic(va("gfx/crosshair%i.tga", num + 1));
 142         if (pic)
 143                 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);
 144 }
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