Create distortion_field.glsl

distortion_field.glsl

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+#include <multisample>
+#include <perlin>
+
+parameter float timeScale = 1.0 : range(0.5, 6.0);
+
+glsl vec4 drawStars(vec2 pos) {
+    vec2 origin = shadron_Dimensions / 2;
+    vec2 loc = pos * shadron_Dimensions;
+    float distFromOrigin = distance(loc, origin);
+
+    float noiseMult = 10 + distFromOrigin + shadron_Time * timeScale;
+
+    // Color some of the stars
+    float blueValue = step(0.75, perlinNoise((pos + vec2(0.33, -0.1)) * noiseMult));
+    float redValue = step(0.75, perlinNoise((pos + vec2(0.39, 0.94)) * noiseMult));
+    vec4 red = vec4(redValue, 0.0, 0.0, redValue);
+    vec4 blue = vec4(0.0, 0.0, blueValue, blueValue);
+    vec4 background = red + blue + vec4(1.0);
+
+    vec4 starMask = vec4(vec3(0.0), 1.0 - step(0.9, perlinNoise(pos * noiseMult)));
+
+    return vec4(mix(background.rgb, starMask.rgb, starMask.a), 1.0);
+}
+
+animation distortionField = glsl(multisample<drawStars, 4>, 1600, 900);