change

include/omath/engines/source_engine/formulas.hpp

@@ -0,0 +1,23 @@
+//
+// Created by Orange on 12/4/2024.
+//
+#pragma once
+#include "Constants.hpp"
+
+namespace omath::source_engine
+{
+    [[nodiscard]]
+    Vector3<float> ForwardVector(const ViewAngles& angles);
+
+    [[nodiscard]]
+    Vector3<float> RightVector(const ViewAngles& angles);
+
+    [[nodiscard]]
+    Vector3<float> UpVector(const ViewAngles& angles);
+
+    [[nodiscard]] Mat4x4 CalcViewMatrix(const ViewAngles& angles, const Vector3<float>& cam_origin);
+
+
+    [[nodiscard]]
+    Mat4x4 CalcPerspectiveProjectionMatrix(float fieldOfView, float aspectRatio, float near, float far);
+} // namespace omath::source