PostProcessing

postprocessing.vs

@@ -0,0 +1,36 @@
+#version 330 core
+layout (location = 0) in vec4 vertex; 
+
+out vec2 TexCoords;
+
+uniform bool chaos;
+uniform bool confuse;
+uniform bool shake;
+uniform float time;
+
+void main()
+{
+    gl_Position = vec4(vertex.xy, 0.0, 1.0);
+    vec2 texture = vertex.zw;
+    if( chaos)
+    {
+        float strength = 0.3;
+        vec2 pos = vec2(texture.x + sin(time) * strength, texture.y + cos(time) * strength);
+        TexCoords = pos;
+    }
+    else if (confuse)
+    {
+        TexCoords = vec2(1.0 - texture.x, 1.0 - texture.y);
+    }
+    else
+    {
+        TexCoords = texture;
+    }
+
+    if(shake)
+    {
+        float strength = 0.01;
+        gl_Position.x += cos(time * 10) * strength;
+        gl_Position.y += cos(time * 15) * strength;
+    }
+}