lightbeam: Remove unused uniform, add some spacing

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@13381 178a84e3-b1eb-0310-8ba1-8eac791a3b58

data/shaders/lightbeam.frag

@@ -4,8 +4,9 @@
 // TODO: Soft edges when it intesects geometry
 // Some artefacts are still visible
 
-uniform sampler2D main_texture;
+uniform sampler2D tex;
 uniform float transparency;
+
 varying vec2 uv;
 varying vec3 eyeVec;
 varying vec3 normal;
@@ -13,7 +14,7 @@ varying vec3 normal;
 void main()
 {
 	float inter = dot(normal, eyeVec);
-	float m = texture2D(main_texture, vec2(0.5, uv.y)).r;
+	float m = texture2D(tex, vec2(0.5, uv.y)).r;
 	float alpha = inter * inter * inter * inter * m;
 
 	gl_FragColor = vec4(1.0, 1.0, 0.8, alpha);

data/shaders/lightbeam.vert

@@ -1,7 +1,6 @@
 // Jean-manuel clemencon supertuxkart
 // Creates a cone lightbeam effect by smoothing edges
 
-uniform float time;
 varying vec2 uv;
 varying vec3 eyeVec;
 varying vec3 normal;