sdfSparkSLOperations.sca

#import <gradients> 
#import <sdf> 
using namespace std;
// Entry point of the shader code asset //
// @param[default=#00FFFFFF] colorl
// @param[default=#0000C0FF] color2 
// @param[default=5.0,min=4.0,max=9.0] armCount
// @return color
vec4 main(vec4 colorl, vec4 color2, float armCount){
    float time = sin(getTime()/0.9);
    vec2 uv = fragment(getVertexTexCoord());
    vec4 color = mix(colorl, color2, gradientHorizontal(uv));
    auto sdf = sdfStarSharp(vec2(0.5, 0.5), 0.25, 0.50, floor(armCount));
    auto sdfR = sdfTwist(sdf, vec2(.5, .5), time); 
    auto sdfRR = sdfRotationalRepeat(sdfR, vec2(.5, .5), .033, 7.);
    auto sdfU = sdfSmoothUnion(sdfR,sdfRR, 0.2);
    float dist = sdfU(uv);
    float edge = fwidth(dist); 
    float alpha = smoothstep(-edge, +edge, dist);
    return mix(color, color.rgb0, alpha); 
}