r_sprites.c

   1
   2 #include "quakedef.h"
   3
   4 static int R_SpriteSetup (const entity_render_t *ent, int type, float org[3], float left[3], float up[3])
   5 {
   6         float scale;
   7
   8         // nudge it toward the view to make sure it isn't in a wall
   9         org[0] = ent->matrix.m[0][3] - r_viewforward[0];
  10         org[1] = ent->matrix.m[1][3] - r_viewforward[1];
  11         org[2] = ent->matrix.m[2][3] - r_viewforward[2];
  12         switch(type)
  13         {
  14         case SPR_VP_PARALLEL_UPRIGHT:
  15                 // flames and such
  16                 // vertical beam sprite, faces view plane
  17                 scale = ent->scale / sqrt(r_viewforward[0]*r_viewforward[0]+r_viewforward[1]*r_viewforward[1]);
  18                 left[0] = -r_viewforward[1] * scale;
  19                 left[1] = r_viewforward[0] * scale;
  20                 left[2] = 0;
  21                 up[0] = 0;
  22                 up[1] = 0;
  23                 up[2] = ent->scale;
  24                 break;
  25         case SPR_FACING_UPRIGHT:
  26                 // flames and such
  27                 // vertical beam sprite, faces viewer's origin (not the view plane)
  28                 scale = ent->scale / sqrt((org[0] - r_vieworigin[0])*(org[0] - r_vieworigin[0])+(org[1] - r_vieworigin[1])*(org[1] - r_vieworigin[1]));
  29                 left[0] = (org[1] - r_vieworigin[1]) * scale;
  30                 left[1] = -(org[0] - r_vieworigin[0]) * scale;
  31                 left[2] = 0;
  32                 up[0] = 0;
  33                 up[1] = 0;
  34                 up[2] = ent->scale;
  35                 break;
  36         default:
  37                 Con_Printf("R_SpriteSetup: unknown sprite type %i\n", type);
  38                 // fall through to normal sprite
  39         case SPR_VP_PARALLEL:
  40                 // normal sprite
  41                 // faces view plane
  42                 left[0] = r_viewleft[0] * ent->scale;
  43                 left[1] = r_viewleft[1] * ent->scale;
  44                 left[2] = r_viewleft[2] * ent->scale;
  45                 up[0] = r_viewup[0] * ent->scale;
  46                 up[1] = r_viewup[1] * ent->scale;
  47                 up[2] = r_viewup[2] * ent->scale;
  48                 break;
  49         case SPR_ORIENTED:
  50                 // bullet marks on walls
  51                 // ignores viewer entirely
  52                 left[0] = ent->matrix.m[0][1];
  53                 left[1] = ent->matrix.m[1][1];
  54                 left[2] = ent->matrix.m[2][1];
  55                 up[0] = ent->matrix.m[0][2];
  56                 up[1] = ent->matrix.m[1][2];
  57                 up[2] = ent->matrix.m[2][2];
  58                 break;
  59         case SPR_VP_PARALLEL_ORIENTED:
  60                 // I have no idea what people would use this for...
  61                 // oriented relative to view space
  62                 // FIXME: test this and make sure it mimicks software
  63                 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];
  64                 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];
  65                 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];
  66                 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];
  67                 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];
  68                 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];
  69                 break;
  70         }
  71         return false;
  72 }
  73
  74 static void R_DrawSpriteImage (int additive, int depthdisable, mspriteframe_t *frame, rtexture_t *texture, vec3_t origin, vec3_t up, vec3_t left, float red, float green, float blue, float alpha)
  75 {
  76         // FIXME: negate left and right in loader
  77         R_DrawSprite(GL_SRC_ALPHA, additive ? GL_ONE : GL_ONE_MINUS_SRC_ALPHA, texture, depthdisable, origin, left, up, frame->left, frame->right, frame->down, frame->up, red, green, blue, alpha);
  78 }
  79
  80 void R_DrawSpriteModelCallback(const void *calldata1, int calldata2)
  81 {
  82         const entity_render_t *ent = calldata1;
  83         int i;
  84         vec3_t left, up, org, color, diffusecolor, diffusenormal;
  85         mspriteframe_t *frame;
  86         vec3_t diff;
  87         float fog, ifog;
  88
  89         if (R_SpriteSetup(ent, ent->model->sprite.sprnum_type, org, left, up))
  90                 return;
  91
  92         R_Mesh_Matrix(&r_identitymatrix);
  93
  94         if (!(ent->flags & RENDER_LIGHT))
  95                 color[0] = color[1] = color[2] = 1;
  96         else
  97         {
  98                 R_CompleteLightPoint(color, diffusecolor, diffusenormal, ent->origin, true, NULL);
  99                 VectorMA(color, 0.5f, diffusecolor, color);
 100         }
 101         color[0] *= ent->colormod[0];
 102         color[1] *= ent->colormod[1];
 103         color[2] *= ent->colormod[2];
 104
 105         if (fogenabled)
 106         {
 107                 VectorSubtract(ent->origin, r_vieworigin, diff);
 108                 fog = exp(fogdensity/DotProduct(diff,diff));
 109                 if (fog > 1)
 110                         fog = 1;
 111         }
 112         else
 113                 fog = 0;
 114         ifog = 1 - fog;
 115
 116         if (r_lerpsprites.integer)
 117         {
 118                 // LordHavoc: interpolated sprite rendering
 119                 for (i = 0;i < 4;i++)
 120                 {
 121                         if (ent->frameblend[i].lerp >= 0.01f)
 122                         {
 123                                 frame = ent->model->sprite.sprdata_frames + ent->frameblend[i].frame;
 124                                 R_DrawSpriteImage((ent->effects & EF_ADDITIVE), (ent->effects & EF_NODEPTHTEST), frame, frame->texture, org, up, left, color[0] * ifog, color[1] * ifog, color[2] * ifog, ent->alpha * ent->frameblend[i].lerp);
 125                                 if (fog * ent->frameblend[i].lerp >= 0.01f)
 126                                         R_DrawSpriteImage(true, (ent->effects & EF_NODEPTHTEST), frame, frame->fogtexture, org, up, left, fogcolor[0],fogcolor[1],fogcolor[2], fog * ent->alpha * ent->frameblend[i].lerp);
 127                         }
 128                 }
 129         }
 130         else
 131         {
 132                 // LordHavoc: no interpolation
 133                 frame = NULL;
 134                 for (i = 0;i < 4 && ent->frameblend[i].lerp;i++)
 135                         frame = ent->model->sprite.sprdata_frames + ent->frameblend[i].frame;
 136
 137                 if (frame)
 138                 {
 139                         R_DrawSpriteImage((ent->effects & EF_ADDITIVE), (ent->effects & EF_NODEPTHTEST), frame, frame->texture, org, up, left, color[0] * ifog, color[1] * ifog, color[2] * ifog, ent->alpha);
 140                         if (fog * ent->frameblend[i].lerp >= 0.01f)
 141                                 R_DrawSpriteImage(true, (ent->effects & EF_NODEPTHTEST), frame, frame->fogtexture, org, up, left, fogcolor[0],fogcolor[1],fogcolor[2], fog * ent->alpha);
 142                 }
 143         }
 144 }
 145
 146 void R_Model_Sprite_Draw(entity_render_t *ent)
 147 {
 148         if (ent->frameblend[0].frame < 0)
 149                 return;
 150
 151         c_sprites++;
 152
 153         R_MeshQueue_AddTransparent(ent->effects & EF_NODEPTHTEST ? r_vieworigin : ent->origin, R_DrawSpriteModelCallback, ent, 0);
 154 }
 155