speedup triangle intersection by reducing STACK_SIZE.

1 files changed, 8 insertions, 1 deletions

diff --git a/src/mesh.h b/src/mesh.h
index 73dff71..d60d801 100644
--- a/src/mesh.h
+++ b/src/mesh.h
@@ -4,7 +4,9 @@
 #include "intersect.h"
 #include "geometry.h"
 
-#define STACK_SIZE 500
+#include "stdio.h"
+
+#define STACK_SIZE 100
 
 /* Tests the intersection between a ray and a node in the bounding volume
    hierarchy. If the ray intersects the bounding volume and `min_distance`
@@ -109,6 +111,11 @@ intersect_mesh(const float3 &origin, const float3& direction, Geometry *g,
 
 	} // node is a leaf
 
+	if (node > tail) {
+	    printf("warning: intersect_mesh() aborted; node > tail\n");
+	    break;
+	}
+
     } // while loop
     while (node != head);