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#ifndef __QEM_H
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#ifndef __QEM_H
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#define __QEM_H
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#define __QEM_H
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#include <cfloat>
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#include <cfloat>
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#include "CGLA/Vec3f.h"
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#include "CGLA/Vec3d.h"
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#include "CGLA/Vec3d.h"
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#include "CGLA/Mat3x3d.h"
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#include "CGLA/Mat3x3d.h"
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namespace
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namespace
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					A += q.A;
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					A += q.A;
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					b += q.b;
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					b += q.b;
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					c += q.c;
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					c += q.c;
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				}
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				}
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			float error(const CGLA::Vec3f& _p) const
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			float error(const CGLA::Vec3d& p) const
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				{
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				{
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					CGLA::Vec3d p(_p);
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					return dot(p,A*p) + 2*dot(b,p)+ c;
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					return dot(p,A*p) + 2*dot(b,p)+ c;
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				}
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				}
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			double determinant() const
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			double determinant() const
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				{
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				{
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					return CGLA::determinant(A);
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					return CGLA::determinant(A);
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				}
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				}
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			const CGLA::Vec3f grad(const CGLA::Vec3f& _p) const
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			const CGLA::Vec3d grad(const CGLA::Vec3d& _p) const
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				{
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				{
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					CGLA::Vec3d p(_p);
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					CGLA::Vec3d p(_p);
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					CGLA::Vec3f g(2*A*p+2*b);
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					CGLA::Vec3d g(2*A*p+2*b);
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					return g;
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					return g;
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				}
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				}
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			CGLA::Vec3f opt_pos(double QEM_thresh = 0.005) const;
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			CGLA::Vec3d opt_pos(double QEM_thresh = 0.005) const;
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		};
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		};
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}
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}
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namespace GEO = Geometry;
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namespace GEO = Geometry;