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glsl-combine-smooth

v1.0.0

Published

Smoothly combine two signed distance fields.

Downloads

10

Readme

glsl-combine-smooth

stable

Smoothly combine two signed distance fields. A useful alternative to glsl-smooth-min that provides you with an explicit radius of influence and avoids distorting the distance fields.

view demo

This technique was derived from a great talk at NVScene by Johann Korndörfer.

Usage

NPM

float combine(float d1, float d2, float radius)

Given two distances d1 and d2, smoothly merge them together within the supplied radius.

uniform float iGlobalTime;

#pragma glslify: combine = require('glsl-combine-smooth')
#pragma glslify: box     = require('glsl-sdf-box')

vec2 doModel(vec3 p) {
  vec3  off    = sin(0, iGlobalTime, 0);
  float dist1  = box(p, vec3(2.0));
  float dist2  = box(p + off, vec3(1.0));
  float radius = 0.5;

  float dist = combine(dist1, dist2, radius);

  return vec2(dist, 1.0);
}

Contributing

See stackgl/contributing for details.

License

MIT. See LICENSE.md for details.