Distance field operations

A collection of useful operators and modifiers for distance field equations from iQ's excellent distance functions page. They can be used with glsl-sdf-primitives for combining and transforming basic primitive shapes.

Operators include union, subtract, intersect and modifier include repeat, rotate and twist.

The library is compatible with glslify.

Usage

vec2 doModel(vec3 p);
#pragma glslify: raytrace = require('glsl-raytrace', map = doModel, steps = 90)

// import some operators
#pragma glslify: opU    = require('glsl-sdf-ops/union')
#pragma glslify: opTwist    = require('glsl-sdf-ops/twist')

// import a couple of primitives
#pragma glslify: sdTorus    = require('glsl-sdf-primitives/sdTorus')
#pragma glslify: sdSphere   = require('glsl-sdf-primitives/sdSphere')

vec2 doModel(vec3 p) {
  return opU( vec2( sdTorus( opTwist( p ), vec2( 0.20, 0.05 )), 0.0 )),
              vec2( sdSphere( p, 0.2, 0.0 ), 1.0 ));
}

Operators

intersection, union, subtract

Modifiers

twist, bend, repeat, rotate-translate

Ray Marching

ao, soft-shadow