From 5ee803bf1d0a99db94be178c190239a302f887c3 Mon Sep 17 00:00:00 2001
From: Sam Gondelman <samuel_gondelman@alumni.brown.edu>
Date: Tue, 27 Nov 2018 10:54:56 -0800
Subject: [PATCH] Update parabola.slv

---
 libraries/render-utils/src/parabola.slv | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libraries/render-utils/src/parabola.slv b/libraries/render-utils/src/parabola.slv
index f220c656aa..6032452d1d 100644
--- a/libraries/render-utils/src/parabola.slv
+++ b/libraries/render-utils/src/parabola.slv
@@ -49,7 +49,7 @@ void main(void) {
         normal = vec4(normalize(cross(_parabolaData.velocity, _parabolaData.acceleration)), 0);
     }
     
-    pos += 0.5 * _parabolaData.width * normal * mix(-1.0, 1.0, float(gl_VertexID % 2 == 0));
+    pos += 0.5 * _parabolaData.width * normal * (-1.0 + 2.0 * float(gl_VertexID % 2 == 0));
 
     <$transformModelToClipPos(cam, obj, pos, gl_Position)$>
-}
\ No newline at end of file
+}