mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-12 20:17:49 +00:00
131 lines
3.7 KiB
C++
131 lines
3.7 KiB
C++
/* 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 3 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, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#ifndef MATH_VECTOR3D_H
|
|
#define MATH_VECTOR3D_H
|
|
|
|
#include "common/scummsys.h"
|
|
#include "common/endian.h"
|
|
|
|
#include "math/angle.h"
|
|
#include "math/squarematrix.h"
|
|
#include "math/vector.h"
|
|
|
|
namespace Math {
|
|
|
|
typedef Matrix<3, 1> Vector3d;
|
|
|
|
template<>
|
|
class Matrix<3, 1> : public MatrixType<3, 1> {
|
|
public:
|
|
float& x() { return value(0); }
|
|
float x() const { return value(0); }
|
|
float& y() { return value(1); }
|
|
float y() const { return value(1); }
|
|
float& z() { return value(2); }
|
|
float z() const { return value(2); }
|
|
|
|
Matrix();
|
|
Matrix(float lx, float ly, float lz);
|
|
Matrix(const MatrixBase<3, 1> &m);
|
|
Matrix(const float *data);
|
|
|
|
/**
|
|
* Set the value of the vector using three floats
|
|
* @param lx X Value
|
|
* @param ly Y Value
|
|
* @param lz Z Value
|
|
*/
|
|
void set(float lx, float ly, float lz);
|
|
|
|
/**
|
|
* Get the angle of this vector around the unit circle
|
|
* This operation ignores the z-component
|
|
* @return The computed angle
|
|
*/
|
|
Angle unitCircleAngle() const;
|
|
|
|
/**
|
|
* Multiply vector XYZ with Matrix 3x3
|
|
*
|
|
* @return The result of multiplication
|
|
*/
|
|
inline Vector3d operator*(const MatrixType<3, 3> &m) const {
|
|
const float *d = m.getData();
|
|
return Vector3d(x() * d[0] + y() * d[3] + z() * d[6],
|
|
x() * d[1] + y() * d[4] + z() * d[7],
|
|
x() * d[2] + y() * d[5] + z() * d[8]);
|
|
}
|
|
|
|
/**
|
|
* Find the cross product between two vectors
|
|
* @param v1 The first vector
|
|
* @param v2 The second vector
|
|
* @return The resulting cross product
|
|
*/
|
|
inline static Vector3d crossProduct(const Vector3d& v1, const Vector3d& v2) {
|
|
return Vector3d(v1.y() * v2.z() - v1.z() * v2.y(),
|
|
v1.z() * v2.x() - v1.x() * v2.z(),
|
|
v1.x() * v2.y() - v1.y() * v2.x());
|
|
}
|
|
|
|
/**
|
|
* Find the angle between two vectors
|
|
* @param v1 The first vector
|
|
* @param v2 The second vector
|
|
* @return The computed angle
|
|
*/
|
|
inline static Angle angle(const Vector3d& v1, const Vector3d& v2) {
|
|
return Angle::arcCosine(MIN(MAX(dotProduct(v1, v2) / (v1.getMagnitude() * v2.getMagnitude()), -1.0f), 1.0f));
|
|
}
|
|
|
|
/**
|
|
* Calculate vector length
|
|
* @return The computed length
|
|
*/
|
|
inline static float length(const Vector3d& v) {
|
|
return sqrtf(v.x() * v.x() + v.y() * v.y() + v.z() * v.z());
|
|
}
|
|
|
|
/**
|
|
* Calculate vector length
|
|
* @return The computed length
|
|
*/
|
|
float length() const {
|
|
return sqrtf(x() * x() + y() * y() + z() * z());
|
|
}
|
|
|
|
/**
|
|
* Linearly interpolate between two vectors
|
|
* @param v1 The first vector
|
|
* @param v2 The second vector
|
|
* @param a The value to use to interpolate between v1 and v2
|
|
* @return The resulting calculation
|
|
*/
|
|
inline static Vector3d interpolate(const Vector3d& v1, const Vector3d& v2, const float a) {
|
|
return Vector3d(v1 * (1.0f - a) + v2 * a);
|
|
}
|
|
};
|
|
|
|
} // end of namespace Math
|
|
|
|
#endif
|