A Julia set rotating through a twist

march_10_julia_twist.js

// copy and paste into https://charlieroberts.github.io/marching/playground/
// select all and hit ctrl+enter
mat1 = Material( 'phong', .05, 1, .5 )
mat2 = Material( 'phong', 0, .1, .25 )

march( 
  t = Twist( 
    b = Julia().material( mat1 ).scale(.4), 
    Vec2(10) 
  ),
  p = Plane( Vec3(0,0,1), .3 ).material(mat2)
)
.light(
  Light( Vec3(1,0,1.5), Vec3(.125), .4 )
)
.render('fractal.kindaclose')
.camera(0,0,1)

onframe = time => {
  b.rotate( time*15, 1, 1, 0 )
  b.fold = 3 + sin( time/4 ) * .25
}