WebGL Shader Manager v3 - Alle Uniforms

✎ Mandelbrot Zoom bearbeiten

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_mouse;
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 + 0.5*sin(u_time*0.2)) / u_zoom;
    vec2 c = uv * zoom + vec2(-0.5, 0.0) + (u_mouse / u_resolution - 0.5) * 0.5;
    vec2 z = vec2(0.0);
    float iter = 0.0;
    for (int i = 0; i < 80; i++) {
        z = csqr(z) + c;
        if (dot(z, z) > 4.0) break;
        iter++;
    }
    float col = iter / 80.0;
    gl_FragColor = vec4(vec3(16.0*col, 8.0*col*0.7, 4.0*col*0.4), 1.0);
}

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