wandering_stars.sttf

{"links":[{"end":"RenderOutput","filter":"Linear","slot":0,"start":"Image","wrapMode":"Repeat"}],"metadata":{"Author":"ApeSander","Description":"This is the third shader I ever made. I tried to create something interesting using bezier curves.","Name":"Wandering Stars","ShaderToyURL":"https://www.shadertoy.com/view/DdXyz7"},"nodes":[{"class":"RenderOutput","name":"RenderOutput"},{"class":"GLSLShader","name":"Image","source":"// Function to create the colors (https://iquilezles.org/articles/palettes/)\nvec3 palette( in float t )\n{\n    vec3 a = vec3(0.5, 0.5, 0.5);\n    vec3 b = vec3(0.5, 0.5, 0.5);\n    vec3 c = vec3(1.0, 1.0, 1.0);\n    vec3 d = vec3(0.00, 0.10, 0.20);\n    \n    return a + b*cos( 6.28318*(c*t+d) );\n}\n\nvoid mainImage( out vec4 fragColor, in vec2 fragCoord )\n{\n    // Normalize uv with a fixed aspect ratio\n    vec2 uv = (fragCoord * 2.0 - iResolution.xy) / iResolution.y;\n    \n    vec3 color = palette(uv.x + iTime / 4.0);\n    \n    float d0 = 0.0;\n    for (float j = 1.0; j < 6.0; j++) { // Makes 5 groups of stars\n        for (float i = 0.0; i < 20.0; i++) { // Makes 20 stars in every group\n            // Bezier curve code (https://www.youtube.com/watch?v=aVwxzDHniEw)\n            float t = (sin(iTime + i*2.0) + 1.0) / 2.0;\n            \n            // 0.84, -0.67, 1.45 and so on are just random values to make the movement look random \n            vec2 p1 = vec2(sin(iTime * 0.83 * j), cos(iTime * -0.67 * j / 2.0)); // Multiplying by j to create the kind of flower effect\n            vec2 p2 = vec2(cos(iTime * 1.45), cos(iTime * 0.78));\n            vec2 p3 = vec2(cos(iTime * -0.67), sin(iTime * 0.23));\n            vec2 p4 = vec2(sin(iTime * -0.19), sin(iTime * -0.35));\n            vec2 p5 = p1;\n\n            vec2 q1 = p1 + t * (p2 - p1);\n            vec2 q2 = p2 + t * (p3 - p2);\n            vec2 q3 = p3 + t * (p4 - p3);\n            vec2 q4 = p4 + t * (p5 - p4);\n\n            vec2 r1 = q1 + t * (q2 - q1);\n            vec2 r2 = q2 + t * (q3 - q2);\n            vec2 r3 = q3 + t * (q4 - q3);\n\n            vec2 s1 = r1 + t * (r2 - r1);\n            vec2 s2 = r2 + t * (r3 - r2);\n\n            vec2 u1 = s1 + t * (s2 - s1);\n\n            float d = length(uv - u1);\n\n            d = 0.02 / d;\n\n            if (d > d0) d0 = d;\n        }\n    }\n    \n    fragColor = vec4(color*d0, 1.0);\n}\n","type":"Image"}]}