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@ -659,19 +659,16 @@ class SelectionSphere(SelectionQueue):
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def isEntryBackfacing(self, entry):
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# If dot product of collision point surface normal and
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# ray from sphere origin to collision point is positive, we are
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# looking at the backface of the polygon
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ip = entry.getFromIntersectionPoint()
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c = entry.getFrom().getCenter()
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n = entry.getFromSurfaceNormal()
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# ray from sphere origin to collision point is positive,
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# center is on the backside of the polygon
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v = Vec3(entry.getFromIntersectionPoint() -
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entry.getFrom().getCenter())
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# Normalize and check angle between to vectors
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print '(%0.2f, %0.2f, %0.2f), (%0.2f, %0.2f, %0.2f), (%0.2f, %0.2f, %0.2f), %0.2f' %(ip[0],ip[1],ip[2],c[0],c[1],c[2],n[0],n[1],n[2], v.dot(n))
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n = entry.getFromSurfaceNormal()
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# If points almost on top of each other, reject face
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# (treat as backfacing)
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if v.length() < 0.05:
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# Points almost on top of each other,
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# reject face (treat as backfacing)
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return 1
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# Normalize and check angle between to vectors
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v.normalize()
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return v.dot(n) >= 0
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