r_sprites.c

   1
   2 #include "quakedef.h"
   3
   4 void R_DrawSpriteModelCallback(const void *calldata1, int calldata2)
   5 {
   6         const entity_render_t *ent = (entity_render_t *)calldata1;
   7         int i;
   8         vec3_t left, up, org, color, diffusecolor, diffusenormal;
   9         mspriteframe_t *frame;
  10         vec3_t diff;
  11         float fog, ifog;
  12         float scale;
  13
  14         // nudge it toward the view to make sure it isn't in a wall
  15         org[0] = ent->matrix.m[0][3] - r_viewforward[0];
  16         org[1] = ent->matrix.m[1][3] - r_viewforward[1];
  17         org[2] = ent->matrix.m[2][3] - r_viewforward[2];
  18         switch(ent->model->sprite.sprnum_type)
  19         {
  20         case SPR_VP_PARALLEL_UPRIGHT:
  21                 // flames and such
  22                 // vertical beam sprite, faces view plane
  23                 scale = ent->scale / sqrt(r_viewforward[0]*r_viewforward[0]+r_viewforward[1]*r_viewforward[1]);
  24                 left[0] = -r_viewforward[1] * scale;
  25                 left[1] = r_viewforward[0] * scale;
  26                 left[2] = 0;
  27                 up[0] = 0;
  28                 up[1] = 0;
  29                 up[2] = ent->scale;
  30                 break;
  31         case SPR_FACING_UPRIGHT:
  32                 // flames and such
  33                 // vertical beam sprite, faces viewer's origin (not the view plane)
  34                 scale = ent->scale / sqrt((org[0] - r_vieworigin[0])*(org[0] - r_vieworigin[0])+(org[1] - r_vieworigin[1])*(org[1] - r_vieworigin[1]));
  35                 left[0] = (org[1] - r_vieworigin[1]) * scale;
  36                 left[1] = -(org[0] - r_vieworigin[0]) * scale;
  37                 left[2] = 0;
  38                 up[0] = 0;
  39                 up[1] = 0;
  40                 up[2] = ent->scale;
  41                 break;
  42         default:
  43                 Con_Printf("R_SpriteSetup: unknown sprite type %i\n", ent->model->sprite.sprnum_type);
  44                 // fall through to normal sprite
  45         case SPR_VP_PARALLEL:
  46                 // normal sprite
  47                 // faces view plane
  48                 left[0] = r_viewleft[0] * ent->scale;
  49                 left[1] = r_viewleft[1] * ent->scale;
  50                 left[2] = r_viewleft[2] * ent->scale;
  51                 up[0] = r_viewup[0] * ent->scale;
  52                 up[1] = r_viewup[1] * ent->scale;
  53                 up[2] = r_viewup[2] * ent->scale;
  54                 break;
  55         case SPR_ORIENTED:
  56                 // bullet marks on walls
  57                 // ignores viewer entirely
  58                 left[0] = ent->matrix.m[0][1];
  59                 left[1] = ent->matrix.m[1][1];
  60                 left[2] = ent->matrix.m[2][1];
  61                 up[0] = ent->matrix.m[0][2];
  62                 up[1] = ent->matrix.m[1][2];
  63                 up[2] = ent->matrix.m[2][2];
  64                 break;
  65         case SPR_VP_PARALLEL_ORIENTED:
  66                 // I have no idea what people would use this for...
  67                 // oriented relative to view space
  68                 // FIXME: test this and make sure it mimicks software
  69                 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];
  70                 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];
  71                 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];
  72                 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];
  73                 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];
  74                 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];
  75                 break;
  76         }
  77
  78         R_Mesh_Matrix(&r_identitymatrix);
  79
  80         if (!(ent->flags & RENDER_LIGHT))
  81                 color[0] = color[1] = color[2] = 1;
  82         else
  83         {
  84                 R_CompleteLightPoint(color, diffusecolor, diffusenormal, ent->origin, true);
  85                 VectorMA(color, 0.5f, diffusecolor, color);
  86         }
  87         color[0] *= ent->colormod[0];
  88         color[1] *= ent->colormod[1];
  89         color[2] *= ent->colormod[2];
  90
  91         if (fogenabled)
  92         {
  93                 VectorSubtract(ent->origin, r_vieworigin, diff);
  94                 fog = exp(fogdensity/DotProduct(diff,diff));
  95                 if (fog > 1)
  96                         fog = 1;
  97         }
  98         else
  99                 fog = 0;
 100         ifog = 1 - fog;
 101
 102         // LordHavoc: interpolated sprite rendering
 103         for (i = 0;i < 4;i++)
 104         {
 105                 if (ent->frameblend[i].lerp >= 0.01f)
 106                 {
 107                         frame = ent->model->sprite.sprdata_frames + ent->frameblend[i].frame;
 108                         // FIXME: negate left and right in loader
 109                         R_DrawSprite(GL_SRC_ALPHA, (ent->effects & EF_ADDITIVE) ? GL_ONE : GL_ONE_MINUS_SRC_ALPHA, frame->texture, (ent->effects & EF_NODEPTHTEST), org, left, up, frame->left, frame->right, frame->down, frame->up, color[0] * ifog, color[1] * ifog, color[2] * ifog, ent->alpha * ent->frameblend[i].lerp);
 110                         if (fog * ent->frameblend[i].lerp >= 0.01f)
 111                                 R_DrawSprite(GL_SRC_ALPHA, GL_ONE, frame->fogtexture, (ent->effects & EF_NODEPTHTEST), org, left, up, frame->left, frame->right, frame->down, frame->up, fogcolor[0],fogcolor[1],fogcolor[2], fog * ent->alpha * ent->frameblend[i].lerp);
 112                 }
 113         }
 114 }
 115
 116 void R_Model_Sprite_Draw(entity_render_t *ent)
 117 {
 118         if (ent->frameblend[0].frame < 0)
 119                 return;
 120
 121         R_MeshQueue_AddTransparent(ent->effects & EF_NODEPTHTEST ? r_vieworigin : ent->origin, R_DrawSpriteModelCallback, ent, 0);
 122 }
 123