added HasNormal to EmptyCore
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@ -52,6 +52,7 @@ public:
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NormalType &WN(int) { static NormalType dummy_normal(0, 0, 0); assert(0); return dummy_normal; }
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NormalType cWN(int) const { static NormalType dummy_normal(0, 0, 0); return dummy_normal; }
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static bool HasNormal() { return false; }
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static bool HasWedgeNormal() { return false; }
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static bool HasFaceNormal() { return false; }
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