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276 lines
6.9 KiB
276 lines
6.9 KiB
//-*-C++-*-
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/*
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**************************************************************************
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description
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--------------------
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copyright : (C) 2000-2001 by Andreas Zehender
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email : zehender@kde.org
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**************************************************************************
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**************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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**************************************************************************/
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#ifndef PMVECTOR_H
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#define PMVECTOR_H
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#include <tqmemarray.h>
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#include <tqstring.h>
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class PMMatrix;
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/**
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* Class for vectors with variable size
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*/
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class PMVector
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{
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public:
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/**
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* Creates a vector with size s. All values are set to 0
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*/
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PMVector( unsigned int s );
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/**
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* Creates a vector with size 3. All values are set to 0
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*/
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PMVector( );
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/**
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* Creates a vector with coordinates [x,y]
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*/
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PMVector( const double x, const double y );
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/**
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* Creates a vector with coordinates [x,y,z]
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*/
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PMVector( const double x, const double y, const double z );
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/**
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* Creates a vector with coordinates [x,y,z,t]
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*/
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PMVector( const double x, const double y, const double z, const double t );
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/**
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* Copy constructor. Creates a deep copy.
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*/
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PMVector( const PMVector& v );
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/**
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* Deletes the vector
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*/
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~PMVector( );
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/**
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* Returns the size of the vector
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*/
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unsigned int size( ) const { return m_size; }
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/**
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* Resizes the vector. New elements are initialized with 0
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*/
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void resize( unsigned int size );
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/**
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* Returns a reference to a coordinate, 0:x, 1:y, 2:z
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*/
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double& operator[] ( int index );
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/**
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* Returns a reference to a coordinate, 0:x, 1:y, 2:z
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*/
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const double& operator[] ( int index ) const;
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/**
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* Returns the x coordinate
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*/
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double x( ) const { return (*this)[0]; }
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/**
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* Returns the y coordinate
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*/
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double y( ) const { return (*this)[1]; }
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/**
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* Returns the z coordinate
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*/
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double z( ) const { return (*this)[2]; }
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/**
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* Returns the t coordinate
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*/
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double t( ) const { return (*this)[3]; }
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/**
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* Sets the x coordinate
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*/
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void setX( const double d ) { (*this)[0] = d; }
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/**
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* Sets the y coordinate
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*/
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void setY( const double d ) { (*this)[1] = d; }
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/**
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* Sets the z coordinate
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*/
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void setZ( const double d ) { (*this)[2] = d; }
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/**
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* Sets the x coordinate
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*/
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void setT( const double d ) { (*this)[3] = d; }
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/**
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* Transforms the point with the matrix m. Same as p = m * p
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*
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* size must be 3!
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*/
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void transform( const PMMatrix& m );
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/**
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* Assigns p to the vector. Resizes the vector if necessary.
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*/
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PMVector& operator= ( const PMVector& p );
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/**
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* Sets all values to d
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*/
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PMVector& operator= ( const double d );
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/**
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* Multiplies all coordinates with d
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*/
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PMVector& operator*= ( double d );
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/**
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* Divides all coordinates through d
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*/
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PMVector& operator/= ( double d );
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/**
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* Adds d to all coordinates
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*/
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PMVector& operator+= ( double d );
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/**
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* Subtracts d from all coordinates
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*/
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PMVector& operator-= ( double d );
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/**
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* Multiplies the vectors (<x1*x2, y1*y2, z1*z2> ...)
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*/
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PMVector& operator*= ( const PMVector& p );
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/**
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* Divides the vectors (<x1/x2, y1/y2, z1/z2> ...)
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*/
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PMVector& operator/= ( const PMVector& p );
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/**
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* Adds p to the point.
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*/
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PMVector& operator+= ( const PMVector& p );
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/**
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* Subtracts p from the point.
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*/
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PMVector& operator-= ( const PMVector& p );
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/**
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* Returns a point with negated coordinates
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*/
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friend PMVector operator- ( const PMVector& p );
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/**
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* Adds the two points
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*/
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friend PMVector operator+ ( const PMVector& p1, const PMVector& p2 );
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/**
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* Subtracts p2 from p1
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*/
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friend PMVector operator- ( const PMVector& p1, const PMVector& p2 );
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/**
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* Multiplies all coordinates with d
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*/
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friend PMVector operator* ( const PMVector& p, const double d );
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/**
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* Divides all coordinates by d
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*/
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friend PMVector operator/ ( const PMVector& p, const double d );
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/**
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* Adds d to all coordinates
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*/
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friend PMVector operator+ ( const PMVector& p, const double d );
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/**
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* Subtracts d from all coordinates
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*/
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friend PMVector operator- ( const PMVector& p, const double d );
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/**
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* Multiplies all coordinates with d
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*/
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friend PMVector operator* ( const double d, const PMVector& p );
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/**
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* Multiplies the vectors (<x1*x2, y1*y2, z1*z2> ...)
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*/
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friend PMVector operator* ( const PMVector& p1, const PMVector& p2 );
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/**
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* Divides the vectors (<x1/x2, y1/y2, z1/z2> ...)
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*/
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friend PMVector operator/ ( const PMVector& p1, const PMVector& p2 );
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/**
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* Transforms the point p with the matrix m
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* @see transform
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*/
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friend PMVector operator* ( const PMMatrix& m, const PMVector& p );
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/**
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* Returns true if the vectors have the same size and values
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*/
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bool operator== ( const PMVector& p ) const;
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/**
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* Returns false if the vectors have the same size and values
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*/
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bool operator!= ( const PMVector& p ) const;
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/**
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* Returns true if the vectors have the same size and values
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*/
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bool approxEqual( const PMVector& p, double epsilon = 1e-6 ) const;
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/**
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* Returns the cross product of v1 and v2
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*
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* Size of v1 and v2 has to be 3!
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*/
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static PMVector cross( const PMVector& v1, const PMVector& v2 );
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/**
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* Returns the dot product of v1 and v2
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*/
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static double dot( const PMVector& v1, const PMVector& v2 );
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/**
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* Returns the angle between v1 and v2
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*
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* Size of v1 and v2 has to be 3!
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*/
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static double angle( const PMVector& v1, const PMVector& v2 );
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/**
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* Returns the length of the vector
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*/
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double abs( ) const;
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/**
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* Returns a normalized vector that is orthogonal to this vector
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*/
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PMVector orthogonal( ) const;
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/**
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* Returns a string for serialization
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*/
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TQString serialize( ) const;
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/**
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* Returns a string for xml output
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*/
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TQString serializeXML( ) const;
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/**
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* loads the vector data from the xml string
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*/
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bool loadXML( const TQString& str );
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private:
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void allocateMemory( unsigned int size );
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double* m_coord;
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static double s_dummy;
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unsigned int m_size;
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};
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#endif
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