reorganize track assets

Author: Sulfrix

Encore/Assets/gameplay/track/fade.fsh

@@ -0,0 +1,25 @@
+#version 330
+
+in vec2 fragTexCoord;
+in vec4 fragColor;
+in vec3 fragPosition;
+
+uniform sampler2D maskTexture;
+uniform sampler2D texture0;
+uniform vec4 colDiffuse;
+uniform float time;
+uniform float fadeStart;
+uniform float fadeEnd;
+uniform float trackLength = 20;
+uniform float fadeSize = 3;
+
+out vec4 finalColor;
+
+void main()
+{
+    vec2 push = vec2(fragTexCoord.x, fragTexCoord.y-time);
+	
+    vec4 baseColor = texture(texture0, push) * fragColor * colDiffuse;
+    baseColor.a *= smoothstep(trackLength, trackLength-fadeSize, fragPosition.z);
+    finalColor = baseColor;
+}