WebGL Shader Manager v3 - Alle Uniforms

✎ Julia Set

Bereit

Vertex Shader

attribute vec2 a_position;
void main() {
    gl_Position = vec4(a_position, 0.0, 1.0);
}

Fragment Shader

precision mediump float;
uniform float u_time;
uniform vec2 u_resolution;
uniform vec2 u_mouseNorm;
uniform float u_zoom;

vec2 csqr(vec2 z) { return vec2(z.x*z.x - z.y*z.y, 2.0*z.x*z.y); }

void main() {
    vec2 uv = (gl_FragCoord.xy - 0.5*u_resolution.xy) / u_resolution.y;
    float zoom = 1.5 / u_zoom;
    vec2 z = uv * zoom;
    vec2 c = vec2(-0.8 + 0.2*cos(u_time*0.3), 0.156 + 0.2*sin(u_time*0.3));
    c += (u_mouseNorm - 0.5) * 0.4;
    float iter = 0.0;
    for (int i = 0; i < 100; i++) {
        z = csqr(z) + c;
        if (dot(z, z) > 4.0) break;
        iter++;
    }
    float col = iter / 100.0;
    vec3 color = vec3(0.5 + 0.5*cos(6.2831*col + vec3(0.0, 0.5, 1.0)));
    color = mix(vec3(0.02, 0.0, 0.05), color, smoothstep(0.0, 0.1, col));
    gl_FragColor = vec4(color, 1.0);
}

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