295 lines
9.5 KiB
Plaintext
295 lines
9.5 KiB
Plaintext
//C++ header - Open Scene Graph - Copyright (C) 1998-2001 Robert Osfield
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//Distributed under the terms of the GNU Library General Public License (LGPL)
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//as published by the Free Software Foundation.
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#ifndef OSG_MATRIX
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#define OSG_MATRIX 1
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#include <osg/Object>
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#include <osg/Vec3>
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#include <osg/Vec4>
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#include <iostream>
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namespace osg {
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class Quat;
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class SG_EXPORT Matrix : public Object
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{
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public:
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Matrix();
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Matrix( const Matrix& other);
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explicit Matrix( float const * const def );
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Matrix( float a00, float a01, float a02, float a03,
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float a10, float a11, float a12, float a13,
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float a20, float a21, float a22, float a23,
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float a30, float a31, float a32, float a33);
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virtual Object* cloneType() const { return new Matrix(); } \
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virtual Object* clone(const CopyOp&) const { return new Matrix(*this); } \
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virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const Matrix*>(obj)!=NULL; } \
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virtual const char* className() const { return "Matrix"; }
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virtual ~Matrix() {}
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Matrix& operator = (const Matrix& );
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int compare(const Matrix& m) const { ensureRealized(); m.ensureRealized(); return memcmp(_mat,m._mat,sizeof(_mat)); }
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bool operator < (const Matrix& m) const { return compare(m)<0; }
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bool operator == (const Matrix& m) const { return compare(m)==0; }
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bool operator != (const Matrix& m) const { return compare(m)!=0; }
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inline float& operator()(int row, int col) { ensureRealized(); return _mat[row][col]; }
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inline float operator()(int row, int col) const { ensureRealized(); return _mat[row][col]; }
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void set( float const * const );
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void set( float a00, float a01, float a02, float a03,
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float a10, float a11, float a12, float a13,
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float a20, float a21, float a22, float a23,
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float a30, float a31, float a32, float a33);
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float * ptr() { ensureRealized(); return (float *)_mat; }
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const float * ptr() const { ensureRealized(); return (const float *)_mat; }
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inline void ensureRealized() const { if (!fully_realized) const_cast<Matrix*>(this)->makeIdentity();}
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void makeIdentity();
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void makeScale( const Vec3& );
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void makeScale( float, float, float );
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void makeTranslate( const Vec3& );
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void makeTranslate( float, float, float );
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void makeRotate( const Vec3& from, const Vec3& to );
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void makeRotate( float angle, const Vec3& axis );
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void makeRotate( float angle, float x, float y, float z );
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void makeRotate( const Quat& );
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void makeRotate( float, float, float ); //Euler angles
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bool invert( const Matrix& );
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bool invertAffine( const Matrix& );
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//basic utility functions to create new matrices
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inline static Matrix identity( void );
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inline static Matrix scale( const Vec3& );
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inline static Matrix scale( float, float, float );
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inline static Matrix translate( const Vec3& );
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inline static Matrix translate( float, float, float );
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inline static Matrix rotate( const Vec3&, const Vec3& );
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inline static Matrix rotate( float, float, float, float );
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inline static Matrix rotate( float angle, const Vec3& axis);
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inline static Matrix rotate( const Quat& );
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inline Vec3 preMult( const Vec3& v ) const;
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inline Vec3 postMult( const Vec3& v ) const;
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inline Vec3 operator* ( const Vec3& v ) const;
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inline Vec4 preMult( const Vec4& v ) const;
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inline Vec4 postMult( const Vec4& v ) const;
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inline Vec4 operator* ( const Vec4& v ) const;
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void setTrans( float tx, float ty, float tz );
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void setTrans( const Vec3& v );
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Vec3 getTrans() const { ensureRealized(); return Vec3(_mat[3][0],_mat[3][1],_mat[3][2]); }
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/** apply apply an 3x3 transform of v*M[0..2,0..2] */
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inline static Vec3 transform3x3(const Vec3& v,const Matrix& m);
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/** apply apply an 3x3 transform of M[0..2,0..2]*v */
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inline static Vec3 transform3x3(const Matrix& m,const Vec3& v);
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// basic Matrix multiplication, our workhorse methods.
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void mult( const Matrix&, const Matrix& );
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void preMult( const Matrix& );
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void postMult( const Matrix& );
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inline void operator *= ( const Matrix& other )
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{ if( this == &other ) {
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Matrix temp(other);
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postMult( temp );
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}
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else postMult( other );
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}
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inline Matrix operator * ( const Matrix &m ) const
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{
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osg::Matrix r;
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r.mult(*this,m);
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return r;
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}
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// temporarily commented out while waiting for a more generic implementation
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// of MatrixProduct proxy class.
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// // Helper class to optimize product expressions somewhat
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// class MatrixProduct {
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// public:
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// const Matrix& A;
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// const Matrix& B;
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//
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// MatrixProduct( const Matrix& lhs, const Matrix& rhs ) : A(lhs), B(rhs) {}
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// };
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//
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// inline MatrixProduct operator * ( const Matrix& other ) const
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// { return MatrixProduct(*this, other); }
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//
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// inline void operator = ( const MatrixProduct& p )
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// {
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// if( this == &(p.A)) postMult(p.B);
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// else if( this == &(p.B)) preMult(p.A);
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// else mult( p.A, p.B );
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// }
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//
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// Matrix( const MatrixProduct& p ) //allows implicit evaluation of the product
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// { mult( p.A, p.B ); }
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private:
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float _mat[4][4];
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bool fully_realized;
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};
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//static utility methods
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inline Matrix Matrix::identity(void)
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{
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Matrix m;
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m.makeIdentity();
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return m;
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}
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inline Matrix Matrix::scale(float sx, float sy, float sz)
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{
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Matrix m;
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m.makeScale(sx,sy,sz);
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return m;
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}
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inline Matrix Matrix::scale(const Vec3& v )
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{
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return scale(v.x(), v.y(), v.z() );
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}
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inline Matrix Matrix::translate(float tx, float ty, float tz)
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{
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Matrix m;
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m.makeTranslate(tx,ty,tz);
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return m;
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}
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inline Matrix Matrix::translate(const Vec3& v )
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{
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return translate(v.x(), v.y(), v.z() );
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}
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inline Matrix Matrix::rotate( const Quat& q )
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{
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Matrix m;
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m.makeRotate( q );
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return m;
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}
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inline Matrix Matrix::rotate(float angle, float x, float y, float z )
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{
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Matrix m;
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m.makeRotate(angle,x,y,z);
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return m;
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}
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inline Matrix Matrix::rotate(float angle, const Vec3& axis )
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{
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Matrix m;
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m.makeRotate(angle,axis);
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return m;
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}
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inline Matrix Matrix::rotate(const Vec3& from, const Vec3& to )
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{
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Matrix m;
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m.makeRotate(from,to);
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return m;
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}
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inline Vec3 Matrix::postMult( const Vec3& v ) const
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{
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float d = 1.0f/(_mat[3][0]*v.x()+_mat[3][1]*v.y()+_mat[3][2]*v.z()+_mat[3][3]) ;
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return Vec3( (_mat[0][0]*v.x() + _mat[0][1]*v.y() + _mat[0][2]*v.z() + _mat[0][3])*d,
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(_mat[1][0]*v.x() + _mat[1][1]*v.y() + _mat[1][2]*v.z() + _mat[1][3])*d,
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(_mat[2][0]*v.x() + _mat[2][1]*v.y() + _mat[2][2]*v.z() + _mat[2][3])*d) ;
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}
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inline Vec3 Matrix::preMult( const Vec3& v ) const
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{
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float d = 1.0f/(_mat[0][3]*v.x()+_mat[1][3]*v.y()+_mat[2][3]*v.z()+_mat[3][3]) ;
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return Vec3( (_mat[0][0]*v.x() + _mat[1][0]*v.y() + _mat[2][0]*v.z() + _mat[3][0])*d,
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(_mat[0][1]*v.x() + _mat[1][1]*v.y() + _mat[2][1]*v.z() + _mat[3][1])*d,
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(_mat[0][2]*v.x() + _mat[1][2]*v.y() + _mat[2][2]*v.z() + _mat[3][2])*d);
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}
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inline Vec4 Matrix::postMult( const Vec4& v ) const
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{
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return Vec4( (_mat[0][0]*v.x() + _mat[0][1]*v.y() + _mat[0][2]*v.z() + _mat[0][3]*v.w()),
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(_mat[1][0]*v.x() + _mat[1][1]*v.y() + _mat[1][2]*v.z() + _mat[1][3]*v.w()),
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(_mat[2][0]*v.x() + _mat[2][1]*v.y() + _mat[2][2]*v.z() + _mat[2][3]*v.w()),
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(_mat[3][0]*v.x() + _mat[3][1]*v.y() + _mat[3][2]*v.z() + _mat[3][3]*v.w())) ;
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}
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inline Vec4 Matrix::preMult( const Vec4& v ) const
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{
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return Vec4( (_mat[0][0]*v.x() + _mat[1][0]*v.y() + _mat[2][0]*v.z() + _mat[3][0]*v.w()),
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(_mat[0][1]*v.x() + _mat[1][1]*v.y() + _mat[2][1]*v.z() + _mat[3][1]*v.w()),
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(_mat[0][2]*v.x() + _mat[1][2]*v.y() + _mat[2][2]*v.z() + _mat[3][2]*v.w()),
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(_mat[0][3]*v.x() + _mat[1][3]*v.y() + _mat[2][3]*v.z() + _mat[3][3]*v.w()));
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}
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inline Vec3 Matrix::transform3x3(const Vec3& v,const Matrix& m)
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{
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return Vec3( (m._mat[0][0]*v.x() + m._mat[1][0]*v.y() + m._mat[2][0]*v.z()),
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(m._mat[0][1]*v.x() + m._mat[1][1]*v.y() + m._mat[2][1]*v.z()),
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(m._mat[0][2]*v.x() + m._mat[1][2]*v.y() + m._mat[2][2]*v.z()));
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}
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inline Vec3 Matrix::transform3x3(const Matrix& m,const Vec3& v)
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{
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return Vec3( (m._mat[0][0]*v.x() + m._mat[0][1]*v.y() + m._mat[0][2]*v.z()),
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(m._mat[1][0]*v.x() + m._mat[1][1]*v.y() + m._mat[1][2]*v.z()),
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(m._mat[2][0]*v.x() + m._mat[2][1]*v.y() + m._mat[2][2]*v.z()) ) ;
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}
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inline Vec3 operator* (const Vec3& v, const Matrix& m )
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{
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return m.preMult(v);
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}
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inline Vec4 operator* (const Vec4& v, const Matrix& m )
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{
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return m.preMult(v);
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}
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inline Vec3 Matrix::operator* (const Vec3& v) const
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{
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return postMult(v);
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}
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inline Vec4 Matrix::operator* (const Vec4& v) const
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{
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return postMult(v);
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}
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inline std::ostream& operator<< (std::ostream& os, const Matrix& m )
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{
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os << "{"<<std::endl;
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for(int row=0; row<4; ++row) {
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os << "\t";
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for(int col=0; col<4; ++col)
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os << m(row,col) << " ";
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os << std::endl;
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}
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os << "}" << std::endl;
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return os;
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}
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} //namespace osg
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#endif
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