1 files changed, 52 insertions, 0 deletions
diff --git a/Source/Math/mat3.h b/Source/Math/mat3.h
new file mode 100644
index 00000000..69388daf
--- /dev/null
+++ b/Source/Math/mat3.h
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+//-----------------------------------------------------------------------------
+//           Name: mat3.cpp
+//      Developer: Wolfire Games LLC
+//    Description:
+//        License: Read below
+//-----------------------------------------------------------------------------
+//
+//   Copyright 2022 Wolfire Games LLC
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+//-----------------------------------------------------------------------------
+#pragma once
+
+#include <Math/vec3.h>
+#include <Math/mat4.h>
+
+class mat3
+{
+public:
+    mat3(float val = 1.0f);
+    mat3(float e0, float e1, float e2,
+         float e3, float e4, float e5,
+         float e6, float e7, float e8);
+    mat3(const float * rhs);
+    mat3(const mat4& m);
+    ~mat3() {}    //empty
+
+    //cast to pointer to a (float *) for glGetFloatv etc
+    operator float* () const {return (float*) this;}
+    operator const float* () const {return (const float*) this;}
+    
+    inline float& operator()(int i, int j) {return entries[i+j*3];}
+    inline const float& operator()(int i, int j) const {return entries[i+j*3];}
+
+    inline float& operator[](int i) { return entries[i]; }
+    inline const float& operator[](int i) const { return entries[i]; }
+    vec3 operator*(const vec3 &rhs) const;
+
+    //member variables
+    float entries[9];
+};