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, color, diffusecolor, diffusenormal, mforward, mleft, mup;
  10         mspriteframe_t *frame;
  11         float scale;
  12
  13         // nudge it toward the view to make sure it isn't in a wall
  14         Matrix4x4_ToVectors(&ent->matrix, mforward, mleft, mup, org);
  15         VectorSubtract(org, r_view.forward, org);
  16         switch(model->sprite.sprnum_type)
  17         {
  18         case SPR_VP_PARALLEL_UPRIGHT:
  19                 // flames and such
  20                 // vertical beam sprite, faces view plane
  21                 scale = ent->scale / sqrt(r_view.forward[0]*r_view.forward[0]+r_view.forward[1]*r_view.forward[1]);
  22                 left[0] = -r_view.forward[1] * scale;
  23                 left[1] = r_view.forward[0] * scale;
  24                 left[2] = 0;
  25                 up[0] = 0;
  26                 up[1] = 0;
  27                 up[2] = ent->scale;
  28                 break;
  29         case SPR_FACING_UPRIGHT:
  30                 // flames and such
  31                 // vertical beam sprite, faces viewer's origin (not the view plane)
  32                 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]));
  33                 left[0] = (org[1] - r_view.origin[1]) * scale;
  34                 left[1] = -(org[0] - r_view.origin[0]) * scale;
  35                 left[2] = 0;
  36                 up[0] = 0;
  37                 up[1] = 0;
  38                 up[2] = ent->scale;
  39                 break;
  40         default:
  41                 Con_Printf("R_SpriteSetup: unknown sprite type %i\n", model->sprite.sprnum_type);
  42                 // fall through to normal sprite
  43         case SPR_VP_PARALLEL:
  44                 // normal sprite
  45                 // faces view plane
  46                 VectorScale(r_view.left, ent->scale, left);
  47                 VectorScale(r_view.up, ent->scale, up);
  48                 break;
  49         case SPR_ORIENTED:
  50                 // bullet marks on walls
  51                 // ignores viewer entirely
  52                 VectorCopy(mleft, left);
  53                 VectorCopy(mup, up);
  54                 break;
  55         case SPR_VP_PARALLEL_ORIENTED:
  56                 // I have no idea what people would use this for...
  57                 // oriented relative to view space
  58                 // FIXME: test this and make sure it mimicks software
  59                 left[0] = mleft[0] * r_view.forward[0] + mleft[1] * r_view.left[0] + mleft[2] * r_view.up[0];
  60                 left[1] = mleft[0] * r_view.forward[1] + mleft[1] * r_view.left[1] + mleft[2] * r_view.up[1];
  61                 left[2] = mleft[0] * r_view.forward[2] + mleft[1] * r_view.left[2] + mleft[2] * r_view.up[2];
  62                 up[0] = mup[0] * r_view.forward[0] + mup[1] * r_view.left[0] + mup[2] * r_view.up[0];
  63                 up[1] = mup[0] * r_view.forward[1] + mup[1] * r_view.left[1] + mup[2] * r_view.up[1];
  64                 up[2] = mup[0] * r_view.forward[2] + mup[1] * r_view.left[2] + mup[2] * r_view.up[2];
  65                 break;
  66         }
  67
  68         R_Mesh_Matrix(&identitymatrix);
  69
  70         if (!(ent->flags & RENDER_LIGHT))
  71                 color[0] = color[1] = color[2] = 1;
  72         else
  73         {
  74                 vec3_t org;
  75                 Matrix4x4_OriginFromMatrix(&ent->matrix, org);
  76                 R_CompleteLightPoint(color, diffusecolor, diffusenormal, org, true);
  77                 VectorMA(color, 0.5f, diffusecolor, color);
  78         }
  79         color[0] *= ent->colormod[0];
  80         color[1] *= ent->colormod[1];
  81         color[2] *= ent->colormod[2];
  82
  83         // LordHavoc: interpolated sprite rendering
  84         for (i = 0;i < 4;i++)
  85         {
  86                 if (ent->frameblend[i].lerp >= 0.01f)
  87                 {
  88                         frame = model->sprite.sprdata_frames + ent->frameblend[i].frame;
  89                         // FIXME: negate left and right in loader
  90                         R_DrawSprite(GL_SRC_ALPHA, (ent->effects & EF_ADDITIVE) ? GL_ONE : GL_ONE_MINUS_SRC_ALPHA, frame->skin.base, frame->skin.fog, (ent->effects & EF_NODEPTHTEST), org, left, up, frame->left, frame->right, frame->down, frame->up, color[0], color[1], color[2], ent->alpha * ent->frameblend[i].lerp);
  91                 }
  92         }
  93 }
  94
  95 void R_Model_Sprite_Draw(entity_render_t *ent)
  96 {
  97         vec3_t org;
  98         if (ent->frameblend[0].frame < 0)
  99                 return;
 100
 101         Matrix4x4_OriginFromMatrix(&ent->matrix, org);
 102         R_MeshQueue_AddTransparent(ent->effects & EF_NODEPTHTEST ? r_view.origin : org, R_Model_Sprite_Draw_TransparentCallback, ent, 0, r_shadow_rtlight);
 103 }
 104