From 3995a7e1399d4cb71fb761015cc069597863d10a Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Sun, 20 May 2018 14:22:38 +0200
Subject: Extract shader code

---
 src/shader/compute.glsl | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 src/shader/compute.glsl

(limited to 'src/shader/compute.glsl')

diff --git a/src/shader/compute.glsl b/src/shader/compute.glsl
new file mode 100644
index 0000000..8b1deab
--- /dev/null
+++ b/src/shader/compute.glsl
@@ -0,0 +1,34 @@
+static const std::string COMPUTE_SHADER_CODE = R"(
+#version 430
+
+layout (local_size_x = 1) in;
+layout (std430, binding=1) buffer bufferA{ float data[]; };
+
+uniform vec2 world;
+
+float rand(vec2 co){
+	return fract(sin(dot(co.xy, vec2(12.9898,78.233))) * 43758.5453);
+}
+
+bool insideWorld(vec2 v) {
+	return v.x > -world.x/2.
+		&& v.x <  world.x/2.
+		&& v.y > -world.y/2.
+		&& v.y <  world.y/2.;
+}
+
+void main() {
+	uint idx = 3*gl_GlobalInvocationID.x;
+	vec2 v = vec2(data[idx+0], data[idx+1]);
+
+	if ( data[idx+2] < 5. && insideWorld(v) ) {
+		data[idx+0] += 0.01 * cos(v.x*cos(v.y));
+		data[idx+1] += 0.01 * sin(v.x-v.y);
+		data[idx+2] += 0.01;
+	} else {
+		data[idx+0] = -(world.x/2.) + rand(vec2(data[idx+1], data[idx+0])) * world.x;
+		data[idx+1] = -(world.y/2.) + rand(vec2(data[idx+0], data[idx+1])) * world.y;
+		data[idx+2] = uint(rand(v) * 5.);
+	}
+}
+)";
-- 
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