Require GLSL 1.20 in the shaders.

I rely on implicit conversions of types a lot, and 1.20 is basically everywhere.

1 files changed, 2 insertions, 0 deletions

diff --git a/glass.vert b/glass.vert
index 397dac2..5ce3508 100644
--- a/glass.vert
+++ b/glass.vert
@@ -1,3 +1,5 @@
+#version 120
+
 uniform vec3 light_eye;
 varying vec2 texcoord;
 varying vec3 light_surf;