r_sprites.c

   1
   2 #include "quakedef.h"
   3 #include "r_shadow.h"
   4
   5 extern cvar_t v_flipped;
   6
   7 void R_Model_Sprite_Draw_TransparentCallback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
   8 {
   9         int i;
  10         model_t *model = ent->model;
  11         vec3_t left, up, org, mforward, mleft, mup;
  12         float scale;
  13
  14         // nudge it toward the view to make sure it isn't in a wall
  15         Matrix4x4_ToVectors(&ent->matrix, mforward, mleft, mup, org);
  16         VectorSubtract(org, r_view.forward, org);
  17         switch(model->sprite.sprnum_type)
  18         {
  19         case SPR_VP_PARALLEL_UPRIGHT:
  20                 // flames and such
  21                 // vertical beam sprite, faces view plane
  22                 scale = ent->scale / sqrt(r_view.forward[0]*r_view.forward[0]+r_view.forward[1]*r_view.forward[1]);
  23                 left[0] = -r_view.forward[1] * scale;
  24                 left[1] = r_view.forward[0] * scale;
  25                 left[2] = 0;
  26                 up[0] = 0;
  27                 up[1] = 0;
  28                 up[2] = ent->scale;
  29                 break;
  30         case SPR_FACING_UPRIGHT:
  31                 // flames and such
  32                 // vertical beam sprite, faces viewer's origin (not the view plane)
  33                 scale = ent->scale / sqrt((org[0] - r_view.origin[0])*(org[0] - r_view.origin[0])+(org[1] - r_view.origin[1])*(org[1] - r_view.origin[1]));
  34                 left[0] = (org[1] - r_view.origin[1]) * scale;
  35                 left[1] = -(org[0] - r_view.origin[0]) * scale;
  36                 left[2] = 0;
  37                 up[0] = 0;
  38                 up[1] = 0;
  39                 up[2] = ent->scale;
  40                 break;
  41         default:
  42                 Con_Printf("R_SpriteSetup: unknown sprite type %i\n", model->sprite.sprnum_type);
  43                 // fall through to normal sprite
  44         case SPR_VP_PARALLEL:
  45                 // normal sprite
  46                 // faces view plane
  47                 VectorScale(r_view.left, ent->scale, left);
  48                 VectorScale(r_view.up, ent->scale, up);
  49                 break;
  50         case SPR_ORIENTED:
  51                 // bullet marks on walls
  52                 // ignores viewer entirely
  53                 VectorCopy(mleft, left);
  54                 VectorCopy(mup, up);
  55                 break;
  56         case SPR_VP_PARALLEL_ORIENTED:
  57                 // I have no idea what people would use this for...
  58                 // oriented relative to view space
  59                 // FIXME: test this and make sure it mimicks software
  60                 left[0] = mleft[0] * r_view.forward[0] + mleft[1] * r_view.left[0] + mleft[2] * r_view.up[0];
  61                 left[1] = mleft[0] * r_view.forward[1] + mleft[1] * r_view.left[1] + mleft[2] * r_view.up[1];
  62                 left[2] = mleft[0] * r_view.forward[2] + mleft[1] * r_view.left[2] + mleft[2] * r_view.up[2];
  63                 up[0] = mup[0] * r_view.forward[0] + mup[1] * r_view.left[0] + mup[2] * r_view.up[0];
  64                 up[1] = mup[0] * r_view.forward[1] + mup[1] * r_view.left[1] + mup[2] * r_view.up[1];
  65                 up[2] = mup[0] * r_view.forward[2] + mup[1] * r_view.left[2] + mup[2] * r_view.up[2];
  66                 break;
  67         }
  68
  69         if(v_flipped.integer)
  70         {
  71                 left[0] = -left[0];
  72                 left[1] = -left[1];
  73         }
  74
  75         R_Mesh_Matrix(&identitymatrix);
  76
  77         // LordHavoc: interpolated sprite rendering
  78         for (i = 0;i < 4;i++)
  79         {
  80                 if (ent->frameblend[i].lerp >= 0.01f)
  81                 {
  82                         mspriteframe_t *frame = model->sprite.sprdata_frames + ent->frameblend[i].frame;
  83                         texture_t *texture = model->data_textures + ent->frameblend[i].frame;
  84                         R_UpdateTextureInfo(ent, texture);
  85                         // FIXME: negate left and right in loader
  86                         R_DrawSprite(texture->currentlayers[0].blendfunc1, texture->currentlayers[0].blendfunc2, texture->basetexture, texture->currentskinframe->fog, (texture->currentmaterialflags & MATERIALFLAG_NODEPTHTEST), (texture->currentmaterialflags & MATERIALFLAG_SHORTDEPTHRANGE), org, left, up, frame->left, frame->right, frame->down, frame->up, texture->currentlayers[0].color[0], texture->currentlayers[0].color[1], texture->currentlayers[0].color[2], ent->alpha * ent->frameblend[i].lerp);
  87                 }
  88         }
  89 }
  90
  91 void R_Model_Sprite_Draw(entity_render_t *ent)
  92 {
  93         vec3_t org;
  94         if (ent->frameblend[0].frame < 0)
  95                 return;
  96
  97         Matrix4x4_OriginFromMatrix(&ent->matrix, org);
  98         R_MeshQueue_AddTransparent(ent->effects & EF_NODEPTHTEST ? r_view.origin : org, R_Model_Sprite_Draw_TransparentCallback, ent, 0, r_shadow_rtlight);
  99 }
 100