dynamically scale the meshqueue transparency sorting distances to adapt the precision...

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@5834 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/meshqueue.c b/meshqueue.c
index f2e17ff8db94531b36a29e8697b6aa38ec3d964c..b176bf4dc677ae17a3e8bd57a2ce86cf0462fac3 100644 (file)
--- a/meshqueue.c
+++ b/meshqueue.c
@@ -17,6 +17,7 @@ typedef struct meshqueue_s
 meshqueue_t;
 
 float mqt_viewplanedist;
+float mqt_viewmaxdist;
 meshqueue_t *mq_array, *mqt_array, *mq_listhead;
 int mq_count, mqt_count;
 int mq_total, mqt_total;
@@ -111,12 +112,14 @@ void R_MeshQueue_AddTransparent(const vec3_t center, void (*callback)(const void
        mq->data2 = data2;
        mq->dist = DotProduct(center, r_viewforward) - mqt_viewplanedist;
        mq->next = NULL;
+       mqt_viewmaxdist = max(mqt_viewmaxdist, mq->dist);
 }
 
 void R_MeshQueue_RenderTransparent(void)
 {
        int i;
        int hashdist;
+       float distscale;
        meshqueue_t *mqt;
        meshqueue_t *hash[4096], **hashpointer[4096];
        if (mq_count)
@@ -126,10 +129,11 @@ void R_MeshQueue_RenderTransparent(void)
        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);
+               hashdist = (int) (mqt->dist * distscale);
                hashdist = bound(0, hashdist, 4095);
                // link to tail of hash chain (to preserve render order)
                mqt->next = NULL;
@@ -165,6 +169,7 @@ void R_MeshQueue_BeginScene(void)
        mqt_count = 0;
        mq_listhead = NULL;
        mqt_viewplanedist = DotProduct(r_vieworigin, r_viewforward);
+       mqt_viewmaxdist = 0;
 }
 
 void R_MeshQueue_EndScene(void)