From e2736caff6d5b40a818feda1b9b0cfaca3c1b689 Mon Sep 17 00:00:00 2001
From: sebcrozet <developer@crozet.re>
Date: Thu, 4 Oct 2018 20:44:34 +0200
Subject: [PATCH] Fix glm::perspective.

Fix #423.
---
 nalgebra-glm/src/ext/matrix_clip_space.rs | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/nalgebra-glm/src/ext/matrix_clip_space.rs b/nalgebra-glm/src/ext/matrix_clip_space.rs
index c0f3f128..813fe8fc 100644
--- a/nalgebra-glm/src/ext/matrix_clip_space.rs
+++ b/nalgebra-glm/src/ext/matrix_clip_space.rs
@@ -90,9 +90,13 @@ pub fn ortho<N: Real>(left: N, right: N, bottom: N, top: N, znear: N, zfar: N) -
 //    unimplemented!()
 //}
 
-/// Creates a matrix for a symmetric perspective-view frustum based on the right handedness and OpenGL near and far clip planes definition.
-pub fn perspective<N: Real>(fovy: N, aspect: N, near: N, far: N) -> TMat4<N> {
-    Perspective3::new(fovy, aspect, near, far).unwrap()
+
+/// Creates a matrix for a perspective-view frustum based on the right handedness and OpenGL near and far clip planes definition.
+///
+/// # Important note
+/// The `aspect` and `fovy` argument are interchanged compared to the original GLM API.
+pub fn perspective<N: Real>(aspect: N, fovy: N, near: N, far: N) -> TMat4<N> {
+    Perspective3::new(aspect, fovy, near, far).unwrap()
 }
 
 //pub fn perspective_fov<N: Real>(fov: N, width: N, height: N, near: N, far: N) -> TMat4<N> {