SHADER模块整理，初始化代码移至main

parts/shaders/rgb2.glsl

@@ -0,0 +1,11 @@
+extern float t,w,h;
+vec4 effect(vec4 color,Image text,vec2 pos,vec2 scr_pos){
+	float x=scr_pos.x/w;
+	float y=scr_pos.y/h;
+	return vec4(
+		.8-y*.8-.1*sin(t/6.26),
+		.4+.1*sin(t/4.)*(y+2.)/(y+5.),
+		abs(.7-x*1.4+y*.5*sin(t/16.)),
+		1.
+	);
+}