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 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                 vec3_t forward;
  43                 AngleVectors (e->render.angles, forward, right, up);
  44                 // nudge it toward the view, so it will be infront of the wall
  45                 VectorSubtract(e->render.origin, vpn, org);
  46                 // don't draw if it's a backface
  47                 if (DotProduct(r_origin, forward) < (DotProduct(org, forward) + 1.0f))
  48                         return;
  49         }
  50         else
  51         {
  52                 // normal sprite
  53                 VectorCopy(vup, up);
  54                 VectorCopy(vright, right);
  55                 VectorCopy(e->render.origin, org);
  56                 // don't draw if it's a backface
  57                 if (DotProduct(org, vpn) < (DotProduct(r_origin, vpn) + 1.0f))
  58                         return;
  59         }
  60
  61
  62         if (e->render.scale != 1)
  63         {
  64                 VectorScale(up, e->render.scale, up);
  65                 VectorScale(right, e->render.scale, right);
  66         }
  67
  68         // LordHavoc: interpolated sprite rendering
  69         R_ClipSpriteImage(e, psprite, blend, org, up, right);
  70 }
  71
  72 void GL_DrawSpriteImage (mspriteframe_t *frame, vec3_t origin, vec3_t up, vec3_t right, byte red, byte green, byte blue, int alpha)
  73 {
  74         byte alphaub;
  75         alphaub = bound(0, alpha, 255);
  76         transpolybegin(R_GetTexture(frame->texture), 0, R_GetTexture(frame->fogtexture), currententity->render.effects & EF_ADDITIVE ? TPOLYTYPE_ADD : TPOLYTYPE_ALPHA);
  77         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);
  78         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);
  79         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);
  80         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);
  81         transpolyend();
  82 }
  83
  84 /*
  85 =================
  86 R_DrawSpriteModel
  87 =================
  88 */
  89 void R_DrawSpriteModel (entity_t *e, frameblend_t *blend)
  90 {
  91         vec3_t          right, up, org, color, mins, maxs;
  92         byte            colorub[4];
  93         msprite_t       *psprite;
  94
  95         if (!blend[0].lerp)
  96                 return;
  97
  98         VectorAdd (e->render.origin, e->render.model->mins, mins);
  99         VectorAdd (e->render.origin, e->render.model->maxs, maxs);
 100
 101 //      if (R_CullBox (mins, maxs))
 102 //              return;
 103
 104         c_sprites++;
 105
 106         psprite = Mod_Extradata(e->render.model);
 107         //psprite = e->model->cache.data;
 108
 109         if (psprite->type == SPR_ORIENTED)
 110         {       // bullet marks on walls
 111                 vec3_t forward;
 112                 AngleVectors (e->render.angles, forward, right, up);
 113                 VectorSubtract(e->render.origin, vpn, org);
 114                 if (DotProduct(r_origin, forward) < DotProduct(e->render.origin, forward))
 115                         return; // backface
 116         }
 117         else
 118         {       // normal sprite
 119                 VectorCopy(vup, up);
 120                 VectorCopy(vright, right);
 121                 VectorCopy(e->render.origin, org);
 122         }
 123
 124         if (e->render.scale != 1)
 125         {
 126                 VectorScale(up, e->render.scale, up);
 127                 VectorScale(right, e->render.scale, right);
 128         }
 129
 130         if (e->render.model->flags & EF_FULLBRIGHT || e->render.effects & EF_FULLBRIGHT)
 131         {
 132                 color[0] = e->render.colormod[0] * 255;
 133                 color[1] = e->render.colormod[1] * 255;
 134                 color[2] = e->render.colormod[2] * 255;
 135         }
 136         else
 137                 R_CompleteLightPoint(color, e->render.origin, true);
 138
 139         colorub[0] = bound(0, color[0], 255);
 140         colorub[1] = bound(0, color[1], 255);
 141         colorub[2] = bound(0, color[2], 255);
 142
 143         // LordHavoc: interpolated sprite rendering
 144         if (blend[0].lerp)
 145                 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);
 146         if (blend[1].lerp)
 147                 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);
 148         if (blend[2].lerp)
 149                 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);
 150         if (blend[3].lerp)
 151                 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);
 152 }
 153