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#include "quakedef.h"
#include "meshqueue.h"
typedef struct meshqueue_s
{
struct meshqueue_s *next;
void (*callback)(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfaceindices);
const entity_render_t *ent;
int surfacenumber;
const rtlight_t *rtlight;
float dist;
}
meshqueue_t;
float mqt_viewplanedist;
float mqt_viewmaxdist;
meshqueue_t *mqt_array;
int mqt_count;
int mqt_total;
void R_MeshQueue_BeginScene(void)
{
mqt_count = 0;
mqt_viewplanedist = DotProduct(r_refdef.view.origin, r_refdef.view.forward);
mqt_viewmaxdist = 0;
}
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)
{
meshqueue_t *mq;
if (mqt_count >= mqt_total || !mqt_array)
{
int newtotal = max(1024, mqt_total * 2);
meshqueue_t *newarray = (meshqueue_t *)Mem_Alloc(cls.permanentmempool, newtotal * sizeof(meshqueue_t));
if (mqt_array)
{
memcpy(newarray, mqt_array, mqt_total * sizeof(meshqueue_t));
Mem_Free(mqt_array);
}
mqt_array = newarray;
mqt_total = newtotal;
}
mq = &mqt_array[mqt_count++];
mq->callback = callback;
mq->ent = ent;
mq->surfacenumber = surfacenumber;
mq->rtlight = rtlight;
mq->dist = DotProduct(center, r_refdef.view.forward) - mqt_viewplanedist;
mq->next = NULL;
mqt_viewmaxdist = max(mqt_viewmaxdist, mq->dist);
}
void R_MeshQueue_RenderTransparent(void)
{
int i;
int hashdist;
int batchnumsurfaces;
float distscale;
const entity_render_t *ent;
const rtlight_t *rtlight;
void (*callback)(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfaceindices);
meshqueue_t *mqt;
meshqueue_t *hash[4096], **hashpointer[4096];
int batchsurfaceindex[256];
if (!mqt_count)
return;
memset(hash, 0, sizeof(hash));
for (i = 0;i < 4096;i++)
hashpointer[i] = &hash[i];
distscale = 4095.0f / max(mqt_viewmaxdist, 4095);
for (i = 0, mqt = mqt_array;i < mqt_count;i++, mqt++)
{
// generate index
hashdist = (int) (mqt->dist * distscale);
hashdist = bound(0, hashdist, 4095);
// link to tail of hash chain (to preserve render order)
mqt->next = NULL;
*hashpointer[hashdist] = mqt;
hashpointer[hashdist] = &mqt->next;
}
callback = NULL;
ent = NULL;
rtlight = NULL;
batchnumsurfaces = 0;
for (i = 4095;i >= 0;i--)
{
if (hash[i])
{
for (mqt = hash[i];mqt;mqt = mqt->next)
{
if (ent != mqt->ent || rtlight != mqt->rtlight || callback != mqt->callback || batchnumsurfaces >= 256)
{
if (batchnumsurfaces)
callback(ent, rtlight, batchnumsurfaces, batchsurfaceindex);
batchnumsurfaces = 0;
ent = mqt->ent;
rtlight = mqt->rtlight;
callback = mqt->callback;
}
batchsurfaceindex[batchnumsurfaces++] = mqt->surfacenumber;
}
}
}
if (batchnumsurfaces)
callback(ent, rtlight, batchnumsurfaces, batchsurfaceindex);
mqt_count = 0;
}
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