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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef TITANIC_FMATRIX_H
#define TITANIC_FMATRIX_H
#include "titanic/star_control/fvector.h"
namespace Titanic {
class SimpleFile;
/**
* Floating point matrix class.
*/
class FMatrix {
public:
FVector _row1;
FVector _row2;
FVector _row3;
public:
FMatrix();
FMatrix(const FVector &, const FVector &, const FVector &);
FMatrix(const FMatrix &src);
/**
* Load the data for the class from file
*/
void load(SimpleFile *file, int param);
/**
* Save the data for the class to file
*/
void save(SimpleFile *file, int indent);
/**
* Clears the matrix
*/
void clear();
/**
* Sets up an identity matrix
*/
void identity();
/**
* Sets the data for the matrix
*/
void set(const FMatrix &m);
/**
* Sets the data for the matrix
*/
void set(const FVector &row1, const FVector &row2, const FVector &row3);
/**
* Sets the data for the matrix from a vector
*/
void set(const FVector &v);
/**
* Changes this matrix, A, to be C, where C=Am. Matrix m multiplies this matrix (A) on its Right.
* m is said to premultiply A (the previous this matrix).
*/
void matRProd(const FMatrix &m);
/**
* Changes this matrix, A, to be C, where C=mA. Matrix m multiplies this matrix (A) on its Left.
* m is said to postmultiply A (the previous this matrix).
*/
void matLProd(const FMatrix &m);
/**
* Returns true if the passed matrix equals this one
*/
bool operator==(const FMatrix &src) {
return _row1 == src._row1 && _row2 == src._row2 && _row3 == src._row3;
}
/**
* Returns true if the passed matrix does not equal this one
*/
bool operator!=(const FMatrix &src) {
return !operator==(src);
}
/**
* Allows accessing rows as an array
*/
FVector &operator[](int idx) {
assert(idx >= 0 && idx <= 2);
FVector *rows[3] = { &_row1, &_row2, &_row3 };
return *rows[idx];
}
};
/**
* Puts the matrix product between a and m in C, C = am
* Called by MatLProd and MatLProd
* Caller must preallocate output matrix
*/
void matProd(const FMatrix &a, const FMatrix &m, FMatrix &C);
} // End of namespace Titanic
#endif /* TITANIC_FMATRIX_H */
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