1 files changed, 33 insertions, 0 deletions
diff --git a/in_practice/breakout/shaders/post.vert b/in_practice/breakout/shaders/post.vert
new file mode 100644
index 0000000..7a8ac4f
--- /dev/null
+++ b/in_practice/breakout/shaders/post.vert
@@ -0,0 +1,33 @@
+#version 330 core
+
+layout (location = 0) in vec4 vertex;
+
+out vert_t {
+	vec2 tex_coords;
+} vert;
+
+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);
+		vert.tex_coords = pos;
+	} else if (confuse) {
+		vert.tex_coords = vec2(1.0) - texture;
+	} else {
+		vert.tex_coords = texture;
+	}
+	if (shake) {
+		float strength = 0.01;
+		gl_Position.x += cos(time * 10) * strength;
+		gl_Position.y += cos(time * 15) * strength;
+	}
+}