initial version

vertex.glsl

@@ -0,0 +1,14 @@
+#version 130
+
+in vec2 pos;
+in float vertexTime;
+
+out float normalizedTime;
+
+uniform float time;
+uniform mat4 mvp;
+
+void main() {
+     gl_Position = mvp * vec4(pos.x, pos.y, 0, 1);
+     normalizedTime = vertexTime - time;
+}