1 files changed, 7 insertions, 6 deletions
diff --git a/data/shaders/lighting.vert b/data/shaders/lighting.vert
index 0178530..99e9b37 100644
--- a/data/shaders/lighting.vert
+++ b/data/shaders/lighting.vert
@@ -9,20 +9,19 @@
  *
  */
 
-varying vec3 pos;
 varying vec3 normal;
+varying vec3 col_ambi_diff;
+varying vec3 col_emit;
 
 varying vec3 light0vc;
+varying vec3 light0half;
 varying float light0dist;
 
 varying vec3 light1vc;
 varying vec3 light2vc;
 
-varying vec3 col_ambi_diff;
-varying vec3 col_emit;
-
 vec3 v4conv3(vec4 a) {
-	vec4 div = a/a.w;
+	vec4 div = a/(a.w);
 	return div.xyz;
 }
 
@@ -30,15 +29,17 @@ void main() {
 	
 	vec4 vert;
 	vec3 vert_to_light;
+	vec3 vert_to_eye;
 	
 	vert = gl_ModelViewMatrix * gl_Vertex;
-	pos = v4conv3(vert);
 	normal = gl_NormalMatrix * gl_Normal;
 	
 	/* Spotlight - positional light */
 	vert_to_light = v4conv3(gl_LightSource[0].position - vert);
 	light0dist = length(vert_to_light);
 	light0vc = normalize(vert_to_light);
+	vert_to_eye = v4conv3(-vert);
+	light0half = normalize(vert_to_eye + vert_to_light);
 	
 	/* Diffuse "background glow" - this can be normalised only once, here, since 'position'
 	 * is really 'direction' and is the same for all vertices. */