X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=bvh.h;fp=bvh.h;h=94ea69bdf91d95c8ea86b0f79a44c3a33b940848;hb=000297f007a08b25f458656bfb8dfe4345f2ec32;hp=52ce24ab75e39175923ab95a00e508882349afe8;hpb=a9e3181f697ab37fc74f072cfcfdf44e2d659468;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/bvh.h b/bvh.h
index 52ce24a..94ea69b 100644
--- a/bvh.h
+++ b/bvh.h
@@ -143,16 +143,9 @@ VG_STATIC bh_tree *bh_create( void *lin_alloc, bh_system *system,
 {
    assert( max_per_leaf > 0 );
 
-   if( item_count == 0 )
-   {
-      bh_tree *bh = vg_linear_alloc( lin_alloc, sizeof(bh_tree) );
-      bh->node_count = 0;
-      bh->system = system;
-      bh->user = user;
-      return bh;
-   }
+   u32 alloc_count = VG_MAX( 1, item_count );
 
-   u32 totsize = sizeof(bh_tree) + sizeof(bh_node)*(item_count*2-1);
+   u32 totsize = sizeof(bh_tree) + sizeof(bh_node)*(alloc_count*2-1);
    bh_tree *bh = vg_linear_alloc( lin_alloc, vg_align8(totsize) );
    bh->system = system;
    bh->user = user;
@@ -167,7 +160,9 @@ VG_STATIC bh_tree *bh_create( void *lin_alloc, bh_system *system,
    root->start = 0;
 
    bh_update_bounds( bh, 0 );
-   bh_subdivide( bh, 0 );
+
+   if( item_count > 2 )
+      bh_subdivide( bh, 0 );
 
    totsize = sizeof(bh_tree) + sizeof(bh_node) * bh->node_count;
    bh = vg_linear_resize( lin_alloc, bh, totsize );