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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_DVECTOR_H
#define TITANIC_DVECTOR_H
#include "titanic/star_control/fvector.h"
namespace Titanic {
const double Rad2Deg = 180.0 / M_PI;
const double Deg2Rad = 1.0 / Rad2Deg;
class DAffine;
/**
* Double based vector class.
* @remarks TODO: See if it can be merged with FVector
*/
class DVector {
public:
double _x, _y, _z;
public:
DVector() : _x(0), _y(0), _z(0) {}
DVector(double x, double y, double z) : _x(x), _y(y), _z(z) {}
DVector(const FVector &v) : _x(v._x), _y(v._y), _z(v._z) {}
/**
* Attempts to normalizes the vector so the length from origin equals 1.0
* Return value is whether or not it was successful in normalizing
* First argument is scale value that normalizes the vector
* TODO: split this function into 2. One that calculates the normalization
* and another that does the normalization. The 2nd would assert if a
* normalization of one was requested. This is cleaner than the current
* implementation.
*/
bool normalize(double &);
/**
* Returns the distance between this vector and the passed one
*/
double getDistance(const DVector &src);
/**
* Returns the matrix product with this vector and
* also does a z translations. Doesn't change this vector
*/
DVector dAffMatrixProdVec(const DAffine &m);
/**
* Rotate this vector about the Y axis
*/
void rotVectAxisY(double angleDeg);
/**
* Returns a vector, v, that represents a magnitude, and two angles in radians
* 1. Scale this vector to be unit magnitude and store scale in x component of v
* 2. X rotation angle from +y axis of this vector is put in y component of v
* 3. z component output of v is the 4-quadrant angle that z makes with x (Y axis rotation)
*/
DVector getAnglesAsVect() const;
/**
* Returns a matrix that contains the frame rotation based on this vector and
* a vector rotation based on input vector v
*/
DAffine getFrameTransform(const DVector &v);
/**
* Returns a affine matrix that does a x then a y axis frame rotation
* based on the orientation of this vector
*/
DAffine rotXY() const;
/**
* Returns true if the passed vector equals this one
*/
bool operator==(const DVector &src) const {
return _x == src._x && _y == src._y && _z == src._z;
}
/**
* Returns true if the passed vector does not equal this one
*/
bool operator!=(const DVector &src) const {
return _x != src._x || _y != src._y || _z != src._z;
}
DVector operator+(const DVector &delta) const {
return DVector(_x + delta._x, _y + delta._y, _z + delta._z);
}
DVector operator-(const DVector &delta) const {
return DVector(_x - delta._x, _y - delta._y, _z - delta._z);
}
void operator+=(const DVector &delta) {
_x += delta._x;
_y += delta._y;
_z += delta._z;
}
void operator-=(const DVector &delta) {
_x -= delta._x;
_y -= delta._y;
_z -= delta._z;
}
const DVector operator*(double right) const {
return DVector(_x * right, _y * right, _z * right);
}
const DVector operator*(const DVector &right) const {
return DVector(_x * right._x, _y * right._y, _z * right._z);
}
};
} // End of namespace Titanic
#endif /* TITANIC_DVECTOR_H */
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