Added Matrix-class.

1 files changed, 29 insertions, 0 deletions

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);
+}
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