1 files changed, 19 insertions, 1 deletions
diff --git a/src/Math/MVP.cpp b/src/Math/MVP.cpp
index de9f2ee..754c656 100644
--- a/src/Math/MVP.cpp
+++ b/src/Math/MVP.cpp
@@ -18,7 +18,7 @@ Matrix<4, 4> view(Vector<3> position, Rotation angles) {
     return rotation * transformation;
 }
 
-Matrix<4, 4> projection(float aspect, float fov, float near, float far) {
+Matrix<4, 4> perspective_projection(float aspect, float fov, float near, float far) {
     auto fov_radians = Math::radians(fov);
 
     float x_scale = 1.0f / (tan(fov_radians / 2.0f) * aspect);
@@ -38,4 +38,22 @@ Matrix<4, 4> projection(float aspect, float fov, float near, float far) {
     return projection;
 }
 
+Matrix<4, 4> orthographic_projection(float width, float height, float near, float far) {
+    float x_scale = 2.0f / width;
+    float y_scale = 2.0f / -height;
+
+    float frustum_length = far - near;
+    float z_near = -(far + near) / frustum_length;
+    float z_far = -2 / frustum_length;
+
+    Matrix<4, 4> projection{
+            x_scale, 0.0f,    0.0f,   -1.0f,
+            0.0f,    y_scale, 0.0f,   1.0f,
+            0.0f,    0.0f,    z_near, z_far,
+            0.0f,    0.0f,    0.0f,   1.0f,
+    };
+
+    return projection;
+}
+
 }