shithub: nanobsp

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fixed a bug in BSP_PickNode_Fast().

--- a/nano_bsp.c

+++ b/nano_bsp.c

@@ -308,6 +308,7 @@

 	seg_t * horiz_part = NULL;

 	fixed_t horiz_dist = (1 << 30);

+	// find the segs closest to middle of bbox

 	seg_t * part;

 	for (part = soup ; part != NULL ; part = part->next)

 	{

@@ -333,11 +334,12 @@

 		}

 	}

+	// check that each partition is viable

 	struct NodeEval v_eval;

 	struct NodeEval h_eval;

-	boolean vert_ok  = BSP_EvalPartition (vert_part,  soup, &v_eval);

-	boolean horiz_ok = BSP_EvalPartition (horiz_part, soup, &h_eval);

+	boolean vert_ok  = (vert_part  != NULL) && BSP_EvalPartition (vert_part,  soup, &v_eval);

+	boolean horiz_ok = (horiz_part != NULL) && BSP_EvalPartition (horiz_part, soup, &h_eval);

 	if (vert_ok && horiz_ok)

 	{

-- 

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