Require GLSL 1.20 in the shaders.

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

4 files changed, 8 insertions, 0 deletions

diff --git a/glass.frag b/glass.frag
index fd6cf5e..fa0dbb9 100644
--- a/glass.frag
+++ b/glass.frag
@@ -1,3 +1,5 @@
+#version 120
+
 #define I965_HACK 1
 
 varying vec3 light_surf;
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;
diff --git a/ground.frag b/ground.frag
index b5a733a..60d0c09 100644
--- a/ground.frag
+++ b/ground.frag
@@ -1,3 +1,5 @@
+#version 120
+
 uniform vec3 light_eye;
 varying vec4 shadow_coords;
 varying vec3 vertex_eye;
diff --git a/shadowmap_display.vert b/shadowmap_display.vert
index 86ea9de..edcc60f 100644
--- a/shadowmap_display.vert
+++ b/shadowmap_display.vert
@@ -1,3 +1,5 @@
+#version 120
+
 varying vec2 texcoord;
 
 void main()