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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_DAFFINE_H
#define TITANIC_DAFFINE_H
#include "titanic/star_control/dvector.h"
#include "titanic/star_control/fvector.h"
namespace Titanic {
class FMatrix;
class CMatrixTransform;
/**
* Affine transformation.
*
* Handles transformation functions between affine spaces,
* which preserves points, straight lines and planes
*/
class DAffine {
private:
static DAffine *_static;
public:
DVector _col1;
DVector _col2;
DVector _col3;
DVector _col4;
public:
DAffine();
//TODO: consider making mode an enum since that is more helpful when it is used in code
DAffine(int mode, const DVector &src);
DAffine(Axis axis, double angleDeg);
DAffine(const FMatrix &src);
/**
* Sets all elements to zero
*/
void clear();
/**
* Sets up an affine matrix for rotating on a given axis by an amount in degrees
*/
void setRotationMatrix(Axis axis, double angleDeg);
/**
* Return the Inverse of this Daffine
*/
DAffine inverseTransform() const;
/**
* Change this Daffine to have its first three columns be some mapping from src matrix
* and the 4rth column to be (three) zeros. The mapping is not as simple as replacing
* matching row/colmn indices
*/
void loadTransform(const CMatrixTransform &src);
/**
* Do the affine product between this Daffine on the right
* and the m Daffine matrix on the left. This product is NOT the same
* as multiplying two matrices of dimensions 3x4.
*/
DAffine compose(const DAffine &m);
};
} // End of namespace Titanic
#endif /* TITANIC_DAFFINE_H */
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