Initial commit

include/Spectre/Math/Matrix3.h

@@ -0,0 +1,79 @@
+
+#ifndef SPECTRE_MATH_MATRIX3_H
+#define SPECTRE_MATH_MATRIX3_H
+
+// 3x3 matrix implementation.
+
+#include <iostream>
+#include <Spectre/Math/Vector2.h>
+
+template<typename T>
+struct Matrix3
+{
+	/* Column-major order are used for the matrices here to be compatible with OpenGL.
+	    _     _
+	   |       |
+	   | 0 3 6 |
+	   | 1 4 7 |
+	   | 2 5 8 |
+	   |_     _|
+	*/
+	union {
+		T m[3][3]; // format: [col][row]
+		T v[9];
+	};
+
+	static Matrix3<T> Identity;
+	static Matrix3<T> Zero;
+
+	inline Matrix3();
+	inline Matrix3( T a, T b, T c, 
+			T d, T e, T f, 
+			T g, T h, T i);
+
+	inline Matrix3(T *a);
+
+	// -----------------
+	// Copy & Assignment.
+	// -----------------
+
+	inline Matrix3<T>& operator=(const Matrix3<T>& mat);
+
+	// -----------------
+	// Compare
+	// -----------------
+
+	inline bool operator==(const Matrix3<T>& mat) const;
+	inline bool operator!=(const Matrix3<T>& mat) const;
+
+	// -----------------
+	// Arithmetic: Matrix-Matrix
+	// -----------------
+
+	inline Matrix3<T> operator*(const Matrix3<T>& mat) const;
+	inline Matrix3<T> operator*=(const Matrix3<T>& mat);
+
+	// Need scalar, vector arithmetic?
+
+	// -----------------
+	// Named operations.
+	// -----------------
+
+	// Determinant.
+	float det() const;
+
+	// Transpose matrix.
+	Matrix3<T> transpose() const;
+};
+
+template <typename T>
+inline std::ostream& operator<<(std::ostream &s, const Matrix3<T>& v);
+
+typedef Matrix3<float>		Matrix3f;
+typedef Matrix3<double>		Matrix3d;
+typedef Matrix3<int>		Matrix3i;
+typedef Matrix3<unsigned>	Matrix3u;
+
+#include "Matrix3.inl"
+
+#endif /* SPECTRE_MATH_MATRIX3_H */