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+#shader vertex
+#version 330 core
+
+layout(location = 0) in vec4 position;
+layout(location = 1) in vec3 colour;
+
+uniform mat4 u_mvpMatrix;
+
+void main()
+{
+ gl_Position = u_mvpMatrix * position;
+};
+
+#shader fragment
+#version 330 core
+
+layout(location = 0) out vec4 color;
+
+vec3 hsl2rgb(in vec3 c)
+{
+ vec3 rgb = clamp(abs(mod(c.x * 6.0 + vec3(0.0, 4.0, 2.0), 6.0) - 3.0) - 1.0, 0.0, 1.0);
+
+ return c.z + c.y * (rgb - 0.5) * (1.0 - abs(2.0 * c.z - 1.0));
+}
+
+void main()
+{
+ vec3 colorRGB = hsl2rgb(vec3(gl_FragCoord.z * 0.8, 1.0, 0.5));
+ color = vec4(colorRGB, 1.0);
+};