meshqueue.c

   1
   2 #include "quakedef.h"
   3 #include "meshqueue.h"
   4
   5 typedef struct meshqueue_s
   6 {
   7         struct meshqueue_s *next;
   8         void (*callback)(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfaceindices);
   9         const entity_render_t *ent;
  10         int surfacenumber;
  11         const rtlight_t *rtlight;
  12         float dist;
  13 }
  14 meshqueue_t;
  15
  16 int trans_sortarraysize;
  17 meshqueue_t **trans_hash = NULL;
  18 meshqueue_t ***trans_hashpointer = NULL;
  19 extern cvar_t r_transparent_sortarraysize;
  20 extern cvar_t r_transparent_sortmindist;
  21 extern cvar_t r_transparent_sortmaxdist;
  22
  23 float mqt_viewplanedist;
  24 float mqt_viewmaxdist;
  25 meshqueue_t *mqt_array;
  26 int mqt_count;
  27 int mqt_total;
  28
  29 void R_MeshQueue_BeginScene(void)
  30 {
  31         mqt_count = 0;
  32         mqt_viewplanedist = DotProduct(r_refdef.view.origin, r_refdef.view.forward);
  33         mqt_viewmaxdist = 0;
  34 }
  35
  36 void R_MeshQueue_AddTransparent(const vec3_t center, void (*callback)(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist), const entity_render_t *ent, int surfacenumber, const rtlight_t *rtlight)
  37 {
  38         meshqueue_t *mq;
  39         if (mqt_count >= mqt_total || !mqt_array)
  40         {
  41                 int newtotal = max(1024, mqt_total * 2);
  42                 meshqueue_t *newarray = (meshqueue_t *)Mem_Alloc(cls.permanentmempool, newtotal * sizeof(meshqueue_t));
  43                 if (mqt_array)
  44                 {
  45                         memcpy(newarray, mqt_array, mqt_total * sizeof(meshqueue_t));
  46                         Mem_Free(mqt_array);
  47                 }
  48                 mqt_array = newarray;
  49                 mqt_total = newtotal;
  50         }
  51         mq = &mqt_array[mqt_count++];
  52         mq->callback = callback;
  53         mq->ent = ent;
  54         mq->surfacenumber = surfacenumber;
  55         mq->rtlight = rtlight;
  56         if (ent && (ent->flags & RENDER_WORLDOBJECT))
  57                 mq->dist = mqt_viewmaxdist;
  58         else
  59                 mq->dist = DotProduct(center, r_refdef.view.forward) - mqt_viewplanedist;
  60         mq->next = NULL;
  61         mqt_viewmaxdist = max(mqt_viewmaxdist, mq->dist);
  62 }
  63
  64 void R_MeshQueue_RenderTransparent(void)
  65 {
  66         int i, hashindex, maxhashindex, batchnumsurfaces;
  67         float distscale;
  68         const entity_render_t *ent;
  69         const rtlight_t *rtlight;
  70         void (*callback)(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfaceindices);
  71         int batchsurfaceindex[MESHQUEUE_TRANSPARENT_BATCHSIZE];
  72         meshqueue_t *mqt;
  73
  74         if (!mqt_count)
  75                 return;
  76
  77         // check for bad cvars
  78         if (r_transparent_sortarraysize.integer < 1 || r_transparent_sortarraysize.integer > 32768)
  79                 Cvar_SetValueQuick(&r_transparent_sortarraysize, bound(1, r_transparent_sortarraysize.integer, 32768));
  80         if (r_transparent_sortmindist.integer < 1 || r_transparent_sortmindist.integer >= r_transparent_sortmaxdist.integer)
  81                 Cvar_SetValueQuick(&r_transparent_sortmindist, 0);
  82         if (r_transparent_sortmaxdist.integer < r_transparent_sortmindist.integer || r_transparent_sortmaxdist.integer > 32768)
  83                 Cvar_SetValueQuick(&r_transparent_sortmaxdist, bound(r_transparent_sortmindist.integer, r_transparent_sortmaxdist.integer, 32768));
  84
  85         // update hash array
  86         if (trans_sortarraysize != r_transparent_sortarraysize.integer)
  87         {
  88                 trans_sortarraysize = r_transparent_sortarraysize.integer;
  89                 if (trans_hash)
  90                         Mem_Free(trans_hash);
  91                 trans_hash = (meshqueue_t **)Mem_Alloc(cls.permanentmempool, sizeof(trans_hash) * trans_sortarraysize);
  92                 if (trans_hashpointer)
  93                         Mem_Free(trans_hashpointer);
  94                 trans_hashpointer = (meshqueue_t ***)Mem_Alloc(cls.permanentmempool, sizeof(trans_hashpointer) * trans_sortarraysize);
  95         }
  96
  97         // build index
  98         memset(trans_hash, 0, sizeof(trans_hash) * trans_sortarraysize);
  99         for (i = 0; i < trans_sortarraysize; i++)
 100                 trans_hashpointer[i] = &trans_hash[i];
 101         distscale = (trans_sortarraysize - 1) / min(mqt_viewmaxdist, r_transparent_sortmaxdist.integer);
 102         maxhashindex = trans_sortarraysize - 1;
 103         for (i = 0, mqt = mqt_array; i < mqt_count; i++, mqt++)
 104         {
 105                 hashindex = bound(0, (int)(bound(0, mqt->dist - r_transparent_sortmindist.integer, r_transparent_sortmaxdist.integer) * distscale), maxhashindex);
 106                 // link to tail of hash chain (to preserve render order)
 107                 mqt->next = NULL;
 108                 *trans_hashpointer[hashindex] = mqt;
 109                 trans_hashpointer[hashindex] = &mqt->next;
 110         }
 111         callback = NULL;
 112         ent = NULL;
 113         rtlight = NULL;
 114         batchnumsurfaces = 0;
 115
 116         // draw
 117         for (i = maxhashindex; i >= 0; i--)
 118         {
 119                 if (trans_hash[i])
 120                 {
 121                         for (mqt = trans_hash[i]; mqt; mqt = mqt->next)
 122                         {
 123                                 if (ent != mqt->ent || rtlight != mqt->rtlight || callback != mqt->callback || batchnumsurfaces >= MESHQUEUE_TRANSPARENT_BATCHSIZE)
 124                                 {
 125                                         if (batchnumsurfaces)
 126                                                 callback(ent, rtlight, batchnumsurfaces, batchsurfaceindex);
 127                                         batchnumsurfaces = 0;
 128                                         ent = mqt->ent;
 129                                         rtlight = mqt->rtlight;
 130                                         callback = mqt->callback;
 131                                 }
 132                                 batchsurfaceindex[batchnumsurfaces++] = mqt->surfacenumber;
 133                         }
 134                 }
 135         }
 136         if (batchnumsurfaces)
 137                 callback(ent, rtlight, batchnumsurfaces, batchsurfaceindex);
 138         mqt_count = 0;
 139 }