r_sprites.c

   1 #include "quakedef.h"
   2
   3 void R_ClipSpriteImage (entity_t *e, msprite_t *psprite, frameblend_t *blend, vec3_t origin, vec3_t up, vec3_t right)
   4 {
   5         int i;
   6         mspriteframe_t *frame;
   7         vec3_t points[4];
   8         float fleft, fright, fdown, fup;
   9         frame = ((mspriteframe_t *)(psprite->ofs_frames + (int) psprite)) + blend[0].frame;
  10         fleft  = frame->left;
  11         fdown  = frame->down;
  12         fright = frame->right;
  13         fup    = frame->up;
  14         for (i = 1;i < 4 && blend[i].lerp;i++)
  15         {
  16                 frame = ((mspriteframe_t *)(psprite->ofs_frames + (int) psprite)) + blend[i].frame;
  17                 fleft  = min(fleft , frame->left );
  18                 fdown  = min(fdown , frame->down );
  19                 fright = max(fright, frame->right);
  20                 fup    = max(fup   , frame->up   );
  21         }
  22         points[0][0] = origin[0] + fdown * up[0] + fleft  * right[0];points[0][1] = origin[1] + fdown * up[1] + fleft  * right[1];points[0][2] = origin[2] + fdown * up[2] + fleft  * right[2];
  23         points[1][0] = origin[0] + fup   * up[0] + fleft  * right[0];points[1][1] = origin[1] + fup   * up[1] + fleft  * right[1];points[1][2] = origin[2] + fup   * up[2] + fleft  * right[2];
  24         points[2][0] = origin[0] + fup   * up[0] + fright * right[0];points[2][1] = origin[1] + fup   * up[1] + fright * right[1];points[2][2] = origin[2] + fup   * up[2] + fright * right[2];
  25         points[3][0] = origin[0] + fdown * up[0] + fright * right[0];points[3][1] = origin[1] + fdown * up[1] + fright * right[1];points[3][2] = origin[2] + fdown * up[2] + fright * right[2];
  26         R_Clip_AddPolygon(&points[0][0], 4, sizeof(float[3]), false, R_Entity_Callback, e, NULL, NULL);
  27 }
  28
  29 void R_ClipSprite (entity_t *e, frameblend_t *blend)
  30 {
  31         vec3_t forward, right, up, org;
  32         msprite_t *psprite;
  33
  34         if (!blend[0].lerp)
  35                 return;
  36
  37         psprite = Mod_Extradata(e->render.model);
  38
  39         if (psprite->type == SPR_ORIENTED)
  40         {
  41                 // bullet marks on walls
  42                 AngleVectors (e->render.angles, forward, right, up);
  43                 // nudge it toward the view, so it will be infront of the wall
  44                 VectorSubtract(e->render.origin, vpn, org);
  45                 // don't draw if it's a backface
  46                 if (DotProduct(r_origin, forward) > (DotProduct(org, forward) - 1.0f))
  47                         return;
  48         }
  49         else
  50         {
  51                 // normal sprite
  52                 VectorCopy(vup, up);
  53                 VectorCopy(vright, right);
  54                 VectorCopy(e->render.origin, org);
  55                 // don't draw if it's a backface
  56                 if (DotProduct(org, vpn) < (DotProduct(r_origin, vpn) + 1.0f))
  57                         return;
  58         }
  59
  60
  61         if (e->render.scale != 1)
  62         {
  63                 VectorScale(up, e->render.scale, up);
  64                 VectorScale(right, e->render.scale, right);
  65         }
  66
  67         // LordHavoc: interpolated sprite rendering
  68         R_ClipSpriteImage(e, psprite, blend, org, up, right);
  69 }
  70
  71 void GL_DrawSpriteImage (mspriteframe_t *frame, vec3_t origin, vec3_t up, vec3_t right, byte red, byte green, byte blue, int alpha)
  72 {
  73         byte alphaub;
  74         alphaub = bound(0, alpha, 255);
  75         transpolybegin(R_GetTexture(frame->texture), 0, R_GetTexture(frame->fogtexture), ((currententity->render.effects & EF_ADDITIVE) || (currententity->render.model->flags & EF_ADDITIVE)) ? TPOLYTYPE_ADD : TPOLYTYPE_ALPHA);
  76         transpolyvertub(origin[0] + frame->down * up[0] + frame->left  * right[0], origin[1] + frame->down * up[1] + frame->left  * right[1], origin[2] + frame->down * up[2] + frame->left  * right[2], 0, 1, red, green, blue, alphaub);
  77         transpolyvertub(origin[0] + frame->up   * up[0] + frame->left  * right[0], origin[1] + frame->up   * up[1] + frame->left  * right[1], origin[2] + frame->up   * up[2] + frame->left  * right[2], 0, 0, red, green, blue, alphaub);
  78         transpolyvertub(origin[0] + frame->up   * up[0] + frame->right * right[0], origin[1] + frame->up   * up[1] + frame->right * right[1], origin[2] + frame->up   * up[2] + frame->right * right[2], 1, 0, red, green, blue, alphaub);
  79         transpolyvertub(origin[0] + frame->down * up[0] + frame->right * right[0], origin[1] + frame->down * up[1] + frame->right * right[1], origin[2] + frame->down * up[2] + frame->right * right[2], 1, 1, red, green, blue, alphaub);
  80         transpolyend();
  81 }
  82
  83 /*
  84 =================
  85 R_DrawSpriteModel
  86 =================
  87 */
  88 void R_DrawSpriteModel (entity_t *e, frameblend_t *blend)
  89 {
  90         vec3_t          forward, right, up, org, color, mins, maxs;
  91         byte            colorub[4];
  92         msprite_t       *psprite;
  93
  94         if (!blend[0].lerp)
  95                 return;
  96
  97         VectorAdd (e->render.origin, e->render.model->mins, mins);
  98         VectorAdd (e->render.origin, e->render.model->maxs, maxs);
  99
 100 //      if (R_CullBox (mins, maxs))
 101 //              return;
 102
 103         c_sprites++;
 104
 105         psprite = Mod_Extradata(e->render.model);
 106         //psprite = e->model->cache.data;
 107
 108         if (psprite->type == SPR_ORIENTED)
 109         {
 110                 // bullet marks on walls
 111                 AngleVectors (e->render.angles, forward, right, up);
 112                 VectorSubtract(e->render.origin, vpn, org);
 113         }
 114         else
 115         {
 116                 // normal sprite
 117                 VectorCopy(vup, up);
 118                 VectorCopy(vright, right);
 119                 VectorCopy(e->render.origin, org);
 120         }
 121
 122         if (e->render.scale != 1)
 123         {
 124                 VectorScale(up, e->render.scale, up);
 125                 VectorScale(right, e->render.scale, right);
 126         }
 127
 128         if (e->render.model->flags & EF_FULLBRIGHT || e->render.effects & EF_FULLBRIGHT)
 129         {
 130                 color[0] = e->render.colormod[0] * 255;
 131                 color[1] = e->render.colormod[1] * 255;
 132                 color[2] = e->render.colormod[2] * 255;
 133         }
 134         else
 135                 R_CompleteLightPoint(color, e->render.origin, true);
 136
 137         colorub[0] = bound(0, color[0], 255);
 138         colorub[1] = bound(0, color[1], 255);
 139         colorub[2] = bound(0, color[2], 255);
 140
 141         // LordHavoc: interpolated sprite rendering
 142         if (blend[0].lerp)
 143                 GL_DrawSpriteImage(((mspriteframe_t *)(psprite->ofs_frames + (int) psprite)) + blend[0].frame, org, up, right, colorub[0],colorub[1],colorub[2], e->render.alpha*255*blend[0].lerp);
 144         if (blend[1].lerp)
 145                 GL_DrawSpriteImage(((mspriteframe_t *)(psprite->ofs_frames + (int) psprite)) + blend[1].frame, org, up, right, colorub[0],colorub[1],colorub[2], e->render.alpha*255*blend[1].lerp);
 146         if (blend[2].lerp)
 147                 GL_DrawSpriteImage(((mspriteframe_t *)(psprite->ofs_frames + (int) psprite)) + blend[2].frame, org, up, right, colorub[0],colorub[1],colorub[2], e->render.alpha*255*blend[2].lerp);
 148         if (blend[3].lerp)
 149                 GL_DrawSpriteImage(((mspriteframe_t *)(psprite->ofs_frames + (int) psprite)) + blend[3].frame, org, up, right, colorub[0],colorub[1],colorub[2], e->render.alpha*255*blend[3].lerp);
 150 }
 151