100 lines
1.9 KiB
C
100 lines
1.9 KiB
C
//this is to render transparent things in a distance oriented order
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#include "quakedef.h"
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#include "renderque.h"
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#define NUMGRADUATIONS 0x400
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static renderque_t *freerque;
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static renderque_t *activerque;
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static renderque_t *initialque;
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static renderque_t *distlastarque[NUMGRADUATIONS];
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static renderque_t *distrque[NUMGRADUATIONS];
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int rqmaxgrad, rqmingrad;
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int rquesize = 0x2000;
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void RQ_AddDistReorder(void (*render) (void *, void *), void *data1, void *data2, float *pos)
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{
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int dist;
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vec3_t delta;
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renderque_t *rq;
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if (!freerque)
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{
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render(data1, data2);
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return;
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}
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VectorSubtract(pos, r_refdef.vieworg, delta);
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dist = Length(delta)/4;
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if (dist > rqmaxgrad)
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{
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if (dist >= NUMGRADUATIONS)
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dist = NUMGRADUATIONS-1;
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rqmaxgrad = dist;
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}
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if (dist < rqmingrad)
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{
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if (dist < 0) //hmm... value wrapped? shouldn't happen
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dist = 0;
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rqmingrad = dist;
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}
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rq = freerque;
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freerque = freerque->next;
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rq->next = NULL;
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if (distlastarque[dist])
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distlastarque[dist]->next = rq;
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distlastarque[dist] = rq;
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rq->render = render;
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rq->data1 = data1;
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rq->data2 = data2;
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if (!distrque[dist])
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distrque[dist] = rq;
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}
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void RQ_RenderDistAndClear(void)
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{
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int i;
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renderque_t *rq;
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for (i = rqmaxgrad; i>=rqmingrad; i--)
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// for (i = rqmingrad; i<=rqmaxgrad; i++)
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{
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for (rq = distrque[i]; rq; rq=rq->next)
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{
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rq->render(rq->data1, rq->data2);
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}
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if (distlastarque[i])
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{
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distlastarque[i]->next = freerque;
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freerque = distrque[i];
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distrque[i] = NULL;
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distlastarque[i] = NULL;
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}
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}
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rqmaxgrad=0;
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rqmingrad = NUMGRADUATIONS-1;
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}
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void RQ_Init(void)
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{
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int i;
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if (initialque)
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return;
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initialque = (renderque_t *) Hunk_AllocName (rquesize * sizeof(renderque_t), "renderque");
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freerque = &initialque[0];
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activerque = NULL;
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for (i=0 ;i<rquesize-1 ; i++)
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initialque[i].next = &initialque[i+1];
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initialque[rquesize-1].next = NULL;
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}
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