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			CGLA::Mat3x3d A;
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			CGLA::Mat3x3d A;
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			CGLA::Vec3d   b;
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			CGLA::Vec3d   b;
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			double   c;
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			double   c;
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		public:
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		public:
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			QEM(): A(0), c(0), b(0) {}
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			QEM(): A(0), b(0), c(0) {}
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			QEM(const CGLA::Vec3d& p0, const CGLA::Vec3d& n0, double w=1.0f):
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			QEM(const CGLA::Vec3d& p0, const CGLA::Vec3d& n0, double w=1.0f):
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				A(direct_product(n0,n0) * w),
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				A(direct_product(n0,n0) * w),
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				b(-n0*dot(n0,p0) * w),
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				b(-n0*dot(n0,p0) * w),
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				c(dot(p0,n0)*dot(p0,n0) * w) {}
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				c(dot(p0,n0)*dot(p0,n0) * w) {}