Make shader work on ATI

git-svn-id: svn://cook.msm.cam.ac.uk:745/thrust3d/thrust3d@204 84d2e878-0bd5-11dd-ad15-13eda11d74c5

1 files changed, 3 insertions, 3 deletions

diff --git a/data/shaders/lighting.vert b/data/shaders/lighting.vert
index d6c9bd4..7f9d606 100644
--- a/data/shaders/lighting.vert
+++ b/data/shaders/lighting.vert
@@ -23,7 +23,7 @@ varying vec3 col_emit;
 void main() {
 	
 	vec4 vert;
-	vec3 E, L;
+	vec4 E;
 	
 	vert = gl_ModelViewMatrix * gl_Vertex;
 	normal = gl_NormalMatrix * gl_Normal;
@@ -31,7 +31,7 @@ void main() {
 	
 	/* Spotlight - positional light */
 	light0vc = vec3(gl_LightSource[0].position - vert);
-	light0hvc = normalize(E + light0hvc);
+	light0hvc = normalize(vec3(E) + light0hvc);
 	light0vc = normalize(light0vc);
 	
 	/* Diffuse "background glow" - this can be normalised only once, here, since 'position'
@@ -40,7 +40,7 @@ void main() {
 	
 	/* Fill-in light */
 	light2vc = normalize(vec3(gl_LightSource[2].position));
-	light2hvc = normalize(E + light2vc);
+	light2hvc = normalize(vec3(E) + light2vc);
 	
 	/* Material properties */
 	col_ambi_diff = gl_Color.rgb;