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_sortmaxdist;
  21
  22 float mqt_viewplanedist;
  23 float mqt_viewmindist;
  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         mqt_viewmindist = 999999999;
  35 }
  36
  37 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)
  38 {
  39         meshqueue_t *mq;
  40         if (mqt_count >= mqt_total || !mqt_array)
  41         {
  42                 int newtotal = max(1024, mqt_total * 2);
  43                 meshqueue_t *newarray = (meshqueue_t *)Mem_Alloc(cls.permanentmempool, newtotal * sizeof(meshqueue_t));
  44                 if (mqt_array)
  45                 {
  46                         memcpy(newarray, mqt_array, mqt_total * sizeof(meshqueue_t));
  47                         Mem_Free(mqt_array);
  48                 }
  49                 mqt_array = newarray;
  50                 mqt_total = newtotal;
  51         }
  52         mq = &mqt_array[mqt_count++];
  53         mq->callback = callback;
  54         mq->ent = ent;
  55         mq->surfacenumber = surfacenumber;
  56         mq->rtlight = rtlight;
  57         mq->dist = DotProduct(center, r_refdef.view.forward) - mqt_viewplanedist;
  58         mq->next = NULL;
  59         mqt_viewmaxdist = max(mqt_viewmaxdist, mq->dist);
  60         mqt_viewmindist = min(mqt_viewmindist, mq->dist);
  61 }
  62
  63 void R_MeshQueue_RenderTransparent(void)
  64 {
  65         int i, hashindex, maxhashindex, batchnumsurfaces;
  66         float distscale;
  67         const entity_render_t *ent;
  68         const rtlight_t *rtlight;
  69         void (*callback)(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfaceindices);
  70         int batchsurfaceindex[MESHQUEUE_TRANSPARENT_BATCHSIZE];
  71         meshqueue_t *mqt;
  72
  73         if (!mqt_count)
  74                 return;
  75
  76         // check for bad cvars
  77         if (r_transparent_sortarraysize.integer < 1 || r_transparent_sortarraysize.integer > 32768)
  78                 Cvar_SetValueQuick(&r_transparent_sortarraysize, bound(1, r_transparent_sortarraysize.integer, 32768));
  79         if (r_transparent_sortmaxdist.integer < 1 || r_transparent_sortmaxdist.integer > 32768)
  80                 Cvar_SetValueQuick(&r_transparent_sortmaxdist, bound(1, r_transparent_sortmaxdist.integer, 32768));
  81
  82         // update hash array
  83         if (trans_sortarraysize != r_transparent_sortarraysize.integer)
  84         {
  85                 trans_sortarraysize = r_transparent_sortarraysize.integer;
  86                 if (trans_hash)
  87                         Mem_Free(trans_hash);
  88                 trans_hash = Mem_Alloc(cls.permanentmempool, sizeof(trans_hash) * trans_sortarraysize);
  89                 if (trans_hashpointer)
  90                         Mem_Free(trans_hashpointer);
  91                 trans_hashpointer = Mem_Alloc(cls.permanentmempool, sizeof(trans_hashpointer) * trans_sortarraysize);
  92         }
  93
  94         // build index
  95         memset(trans_hash, 0, sizeof(trans_hash) * trans_sortarraysize);
  96         for (i = 0; i < trans_sortarraysize; i++)
  97                 trans_hashpointer[i] = &trans_hash[i];
  98         distscale = (trans_sortarraysize - 1) / max( min(mqt_viewmaxdist, r_transparent_sortmaxdist.integer) - mqt_viewmindist, 64 );
  99         maxhashindex = trans_sortarraysize - 1;
 100         for (i = 0, mqt = mqt_array; i < mqt_count; i++, mqt++)
 101         {
 102                 hashindex = bound(0, (int)(min(mqt->dist - mqt_viewmindist, r_transparent_sortmaxdist.integer) * distscale - 0.1), maxhashindex);
 103                 // link to tail of hash chain (to preserve render order)
 104                 mqt->next = NULL;
 105                 *trans_hashpointer[hashindex] = mqt;
 106                 trans_hashpointer[hashindex] = &mqt->next;
 107         }
 108         callback = NULL;
 109         ent = NULL;
 110         rtlight = NULL;
 111         batchnumsurfaces = 0;
 112
 113         // draw
 114         for (i = maxhashindex; i >= 0; i--)
 115         {
 116                 if (trans_hash[i])
 117                 {
 118                         for (mqt = trans_hash[i]; mqt; mqt = mqt->next)
 119                         {
 120                                 if (ent != mqt->ent || rtlight != mqt->rtlight || callback != mqt->callback || batchnumsurfaces >= MESHQUEUE_TRANSPARENT_BATCHSIZE)
 121                                 {
 122                                         if (batchnumsurfaces)
 123                                                 callback(ent, rtlight, batchnumsurfaces, batchsurfaceindex);
 124                                         batchnumsurfaces = 0;
 125                                         ent = mqt->ent;
 126                                         rtlight = mqt->rtlight;
 127                                         callback = mqt->callback;
 128                                 }
 129                                 batchsurfaceindex[batchnumsurfaces++] = mqt->surfacenumber;
 130                         }
 131                 }
 132         }
 133         if (batchnumsurfaces)
 134                 callback(ent, rtlight, batchnumsurfaces, batchsurfaceindex);
 135         mqt_count = 0;
 136 }