r_sprites.c

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