1 ////////////////////////////////////////////////////////////
3 // SFML - Simple and Fast Multimedia Library
4 // Copyright (C) 2007-2009 Laurent Gomila (laurent.gom@gmail.com)
6 // This software is provided 'as-is', without any express or implied warranty.
7 // In no event will the authors be held liable for any damages arising from the use of this software.
9 // Permission is granted to anyone to use this software for any purpose,
10 // including commercial applications, and to alter it and redistribute it freely,
11 // subject to the following restrictions:
13 // 1. The origin of this software must not be misrepresented;
14 // you must not claim that you wrote the original software.
15 // If you use this software in a product, an acknowledgment
16 // in the product documentation would be appreciated but is not required.
18 // 2. Altered source versions must be plainly marked as such,
19 // and must not be misrepresented as being the original software.
21 // 3. This notice may not be removed or altered from any source distribution.
23 ////////////////////////////////////////////////////////////
25 #ifndef SFML_MATRIX3_HPP
26 #define SFML_MATRIX3_HPP
28 ////////////////////////////////////////////////////////////
30 ////////////////////////////////////////////////////////////
31 #include <SFML/Config.hpp>
32 #include <SFML/System/Vector2.hpp>
38 ////////////////////////////////////////////////////////////
39 /// Utility class to manipulate 3x3 matrices representing
40 /// 2D transformations
41 ////////////////////////////////////////////////////////////
42 class SFML_API Matrix3
46 ////////////////////////////////////////////////////////////
47 /// Default constructor (builds an identity matrix)
49 ////////////////////////////////////////////////////////////
52 ////////////////////////////////////////////////////////////
53 /// Construct a matrix from its 9 elements
55 ////////////////////////////////////////////////////////////
56 Matrix3(float a00, float a01, float a02,
57 float a10, float a11, float a12,
58 float a20, float a21, float a22);
60 ////////////////////////////////////////////////////////////
61 /// Build a matrix from a set of transformations
63 /// \param Center : Origin for the transformations
64 /// \param Translation : Translation offset
65 /// \param Rotation : Rotation angle in degrees
66 /// \param Scale : Scaling factors
68 ////////////////////////////////////////////////////////////
69 void SetFromTransformations(const Vector2f& Center, const Vector2f& Translation, float Rotation, const Vector2f& Scale);
71 ////////////////////////////////////////////////////////////
72 /// Transform a point by the matrix
74 /// \param Point : Point to transform
76 /// \return Transformed point
78 ////////////////////////////////////////////////////////////
79 Vector2f Transform(const Vector2f& Point) const;
81 ////////////////////////////////////////////////////////////
82 /// Return the inverse of the matrix
84 /// \return A new matrix which is the inverse of this
86 ////////////////////////////////////////////////////////////
87 Matrix3 GetInverse() const;
89 ////////////////////////////////////////////////////////////
90 /// Return the elements of the matrix as a 4x4,
91 /// in an array of 16 floats
93 /// \return Pointer to the 4x4 matrix elements
95 ////////////////////////////////////////////////////////////
96 const float* Get4x4Elements() const;
98 ////////////////////////////////////////////////////////////
99 /// Operator () overloads to access the matrix elements
101 /// \param Row : Element row (0 based)
102 /// \param Col : Element column (0 based)
104 /// \return Matrix element (Row, Col)
106 ////////////////////////////////////////////////////////////
107 float operator ()(unsigned int Row, unsigned int Col) const;
108 float& operator ()(unsigned int Row, unsigned int Col);
110 ////////////////////////////////////////////////////////////
111 /// Operator * overload to multiply two matrices
113 /// \param Mat : Matrix to multiply
115 /// \return this * Mat
117 ////////////////////////////////////////////////////////////
118 Matrix3 operator *(const Matrix3& Mat) const;
120 ////////////////////////////////////////////////////////////
121 /// Operator *= overload to multiply-assign two matrices
123 /// \param Mat : Matrix to multiply
125 /// \return this * Mat
127 ////////////////////////////////////////////////////////////
128 Matrix3& operator *=(const Matrix3& Mat);
130 ////////////////////////////////////////////////////////////
131 // Static member data
132 ////////////////////////////////////////////////////////////
133 static const Matrix3 Identity; ///< Identity matrix
137 ////////////////////////////////////////////////////////////
139 ////////////////////////////////////////////////////////////
140 float myData[16]; /// Matrix elements (we directly store it as a 4x4 matrix for optimization purpose)
143 #include <SFML/Graphics/Matrix3.inl>
148 #endif // SFML_MATRIX3_HPP