dsound: Make AngleBetweenVectorsRad when vectors have no magnitude.

3f965d58 · Maarten Lankhorst · Alexandre Julliard · 545a774f · 3f965d58
Commit 3f965d58 authored Nov 09, 2007 by Maarten Lankhorst Committed by Alexandre Julliard Nov 12, 2007
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sound3d.c dlls/dsound/sound3d.c +3 -0

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--- a/dlls/dsound/sound3d.c
+++ b/dlls/dsound/sound3d.c
@@ -110,6 +110,9 @@ static inline D3DVALUE AngleBetweenVectorsRad (const D3DVECTOR *a, const D3DVECT
 	product = ScalarProduct (a,b);
 	la = VectorMagnitude (a);
 	lb = VectorMagnitude (b);
+	if (!la || !lb)
+		return 0;
+
 	cos = product/(la*lb);
 	angle = acos(cos);
 	TRACE("angle between (%f,%f,%f) and (%f,%f,%f) = %f radians (%f degrees)\n",  a->x, a->y, a->z, b->x,