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[FILE BEGIN]
1/* GLSL Examples
2 * A collection of GLSL examples for use with the Shader toy website and other
3 * GLSL environments.
4 * By: 0x4248
5 *
6 * Circle animate.
7 * Draws a circle that moves around the screen.
8 */
9
10void mainImage(out vec4 fragColor, in vec2 fragCoord) {
11  vec2 center = vec2(0.5, 0.5);
12
13  float radius = 0.3;
14
15  vec2 uv = fragCoord.xy / iResolution.xy;
16
17  float distance = length(uv - center);
18
19  if (distance < radius) {
20    fragColor = vec4(1.0, 1.0, 1.0, 1.0);
21  } else {
22    fragColor = vec4(0.0, 0.0, 0.0, 1.0);
23  }
24}
25
[FILE END]
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