i hope your hapy

[carveJwlIkooP6JGAAIwe30JlM.git] / bvh.h

diff --git a/bvh.h b/bvh.h
index 52ce24ab75e39175923ab95a00e508882349afe8..23f8a564d54cd7ce1b7830457da97ce15ad790d7 100644 (file)
--- 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;
@@ -167,12 +160,14 @@ 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 );
 
-   vg_success( "BVH done, size: %u/%u\n", bh->node_count, (item_count*2-1) );
+   vg_success( "BVH done, size: %u/%u\n", bh->node_count, (alloc_count*2-1) );
    return bh;
 }