QEM_Quadric.h

Go to the documentation of this file.

#pragma once

#include "MatrixTypes.h"

#pragma warning (push, 3)
#include <vector>
#pragma warning (pop)

// sometimes, we want to be able to easily inherit assignment and 
// copy construction from our parent.
#define COPY_FROM(a,b) a::operator=(b)

#define INHERIT_EQUALITY(OurClass, ParentClass, OtherClass) \
OurClass( OtherClass &q)              { COPY_FROM(ParentClass,q);} \
void operator=(const  OtherClass &q)  { COPY_FROM(ParentClass,q);} \

// -------------------------------------------------------------------
// Quadric: This is a 4x4 symmetrical matrix, which serves to help
// measure the cost of a potential collapse, using the Quadric Error
// Metric.

class Quadric : public SymmetricMatrix4x4
{
    public:

            // constructors
            Quadric() {} 
            INHERIT_EQUALITY (Quadric, SymmetricMatrix4x4, SymmetricMatrix4x4);
            INHERIT_EQUALITY (Quadric, SymmetricMatrix4x4, Matrix4x4);

            // accessors
            bool   getOptimumPoint (Vertex &v) const;
            double getCost (Vertex &v) const;
};



// -------------------------------------------------------------------
// VertexQuadric: A vertex with a quadric glued on.

class VertexQuadric : public Vertex
{
    public:
            // constructor
            VertexQuadric (mfloat x, mfloat y, mfloat z);

            // member variables
            Quadric quadric;
};


typedef std::vector< VertexQuadric > VertexArray;
typedef std::vector< Quadric > QuadricArray;

---