From 8e92b0c5aa0cc57e8729069dad4cb635845f51d8 Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Mon, 24 May 2010 03:12:17 +0200
Subject: Added Matrix-class.

---
 engine/matrix.cpp | 29 +++++++++++++++++++++++++++++
 engine/matrix.h   | 22 ++++++++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 engine/matrix.cpp
 create mode 100644 engine/matrix.h

(limited to 'engine')

diff --git a/engine/matrix.cpp b/engine/matrix.cpp
new file mode 100644
index 0000000..96c539c
--- /dev/null
+++ b/engine/matrix.cpp
@@ -0,0 +1,29 @@
+#include "matrix.h"
+
+#include <cmath>
+
+Matrix2::Matrix2() {
+	m[0][0] = m[0][1] = 
+	m[1][0] = m[1][1] = 0;
+}
+
+Matrix2::Matrix2(float m00, float m01, float m10, float m11) {
+	m[0][0] = m00;
+	m[0][1] = m01;
+	m[1][0] = m10;
+	m[1][1] = m11;
+}
+
+Vector2 Matrix2::operator*(const Vector2& v) {
+	return Vector2(
+		m[0][0] * v.x + m[0][1] * v.y,
+		m[1][0] * v.x + m[1][1] * v.y);
+}
+
+Matrix2 rotation_matrix(float rot) {
+	float s = sinf(rot);
+	float c = cosf(rot);
+	return Matrix2(
+	c, -s,
+	s, c);
+}
\ No newline at end of file
diff --git a/engine/matrix.h b/engine/matrix.h
new file mode 100644
index 0000000..b6e4e3c
--- /dev/null
+++ b/engine/matrix.h
@@ -0,0 +1,22 @@
+#ifndef MATRIX_H
+#define MATRIX_H
+
+#include "vector.h"
+
+template<int M, int N>
+class Matrix {
+	public:
+		float m[M][N];
+};
+
+class Matrix2 : Matrix<2, 2> {
+	public:
+		Matrix2();
+		Matrix2(float m00, float m01, float m10, float m11);
+		
+		Vector2 operator*(const Vector2& v);
+};
+
+Matrix2 rotation_matrix(float rot);
+
+#endif
-- 
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