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, int surfacenumber, const rtlight_t *rtlight)
   6 {
   7         int i;
   8         model_t *model = ent->model;
   9         vec3_t left, up, org, color, diffusecolor, diffusenormal;
  10         mspriteframe_t *frame;
  11         float scale;
  12
  13         // nudge it toward the view to make sure it isn't in a wall
  14         org[0] = ent->matrix.m[0][3] - r_viewforward[0];
  15         org[1] = ent->matrix.m[1][3] - r_viewforward[1];
  16         org[2] = ent->matrix.m[2][3] - r_viewforward[2];
  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_viewforward[0]*r_viewforward[0]+r_viewforward[1]*r_viewforward[1]);
  23                 left[0] = -r_viewforward[1] * scale;
  24                 left[1] = r_viewforward[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_vieworigin[0])*(org[0] - r_vieworigin[0])+(org[1] - r_vieworigin[1])*(org[1] - r_vieworigin[1]));
  34                 left[0] = (org[1] - r_vieworigin[1]) * scale;
  35                 left[1] = -(org[0] - r_vieworigin[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                 left[0] = r_viewleft[0] * ent->scale;
  48                 left[1] = r_viewleft[1] * ent->scale;
  49                 left[2] = r_viewleft[2] * ent->scale;
  50                 up[0] = r_viewup[0] * ent->scale;
  51                 up[1] = r_viewup[1] * ent->scale;
  52                 up[2] = r_viewup[2] * ent->scale;
  53                 break;
  54         case SPR_ORIENTED:
  55                 // bullet marks on walls
  56                 // ignores viewer entirely
  57                 left[0] = ent->matrix.m[0][1];
  58                 left[1] = ent->matrix.m[1][1];
  59                 left[2] = ent->matrix.m[2][1];
  60                 up[0] = ent->matrix.m[0][2];
  61                 up[1] = ent->matrix.m[1][2];
  62                 up[2] = ent->matrix.m[2][2];
  63                 break;
  64         case SPR_VP_PARALLEL_ORIENTED:
  65                 // I have no idea what people would use this for...
  66                 // oriented relative to view space
  67                 // FIXME: test this and make sure it mimicks software
  68                 left[0] = ent->matrix.m[0][1] * r_viewforward[0] + ent->matrix.m[1][1] * r_viewleft[0] + ent->matrix.m[2][1] * r_viewup[0];
  69                 left[1] = ent->matrix.m[0][1] * r_viewforward[1] + ent->matrix.m[1][1] * r_viewleft[1] + ent->matrix.m[2][1] * r_viewup[1];
  70                 left[2] = ent->matrix.m[0][1] * r_viewforward[2] + ent->matrix.m[1][1] * r_viewleft[2] + ent->matrix.m[2][1] * r_viewup[2];
  71                 up[0] = ent->matrix.m[0][2] * r_viewforward[0] + ent->matrix.m[1][2] * r_viewleft[0] + ent->matrix.m[2][2] * r_viewup[0];
  72                 up[1] = ent->matrix.m[0][2] * r_viewforward[1] + ent->matrix.m[1][2] * r_viewleft[1] + ent->matrix.m[2][2] * r_viewup[1];
  73                 up[2] = ent->matrix.m[0][2] * r_viewforward[2] + ent->matrix.m[1][2] * r_viewleft[2] + ent->matrix.m[2][2] * r_viewup[2];
  74                 break;
  75         }
  76
  77         R_Mesh_Matrix(&identitymatrix);
  78
  79         if (!(ent->flags & RENDER_LIGHT))
  80                 color[0] = color[1] = color[2] = 1;
  81         else
  82         {
  83                 R_CompleteLightPoint(color, diffusecolor, diffusenormal, ent->origin, true);
  84                 VectorMA(color, 0.5f, diffusecolor, color);
  85         }
  86         color[0] *= ent->colormod[0];
  87         color[1] *= ent->colormod[1];
  88         color[2] *= ent->colormod[2];
  89
  90         // LordHavoc: interpolated sprite rendering
  91         for (i = 0;i < 4;i++)
  92         {
  93                 if (ent->frameblend[i].lerp >= 0.01f)
  94                 {
  95                         frame = model->sprite.sprdata_frames + ent->frameblend[i].frame;
  96                         // FIXME: negate left and right in loader
  97                         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);
  98                 }
  99         }
 100 }
 101
 102 void R_Model_Sprite_Draw(entity_render_t *ent)
 103 {
 104         if (ent->frameblend[0].frame < 0)
 105                 return;
 106
 107         R_MeshQueue_AddTransparent(ent->effects & EF_NODEPTHTEST ? r_vieworigin : ent->origin, R_Model_Sprite_Draw_TransparentCallback, ent, 0, r_shadow_rtlight);
 108 }
 109