update method

Implementation

void update() {
  count = 0;
  // Triangulate. Yeah, this is slow.
  final smin2 = size - 2;

  for(int z = 1; z < smin2; z ++){
    final zOffset = size2.toInt() * z;
    final fz = ( z - halfsize ) / halfsize; //+ 1
    for (int y = 1; y < smin2; y ++ ) {

      final yOffset = zOffset + size.toInt() * y;
      final fy = ( y - halfsize ) / halfsize; //+ 1

      for (int x = 1; x < smin2; x ++ ) {
        final fx = ( x - halfsize ) / halfsize; //+ 1
        final q = yOffset + x;
        polygonize( fx, fy, fz, q, isolation );
      }
    }
  }

  // set the draw range to only the processed triangles

  geometry?.setDrawRange( 0, count! );

  // update geometry data
  geometry?.getAttributeFromString('position').needsUpdate = true;
  geometry?.getAttributeFromString('normal').needsUpdate = true;

  if (enableUvs ) geometry?.getAttributeFromString( 'uv' ).needsUpdate = true;
  if (enableColors ) geometry?.getAttributeFromString( 'color' ).needsUpdate = true;

  // safety check
  if (count! / 3 > maxPolyCount ){
    throw( 'THREE.MarchingCubes: Geometry buffers too small for rendering. Please create an instance with a higher poly count.' );
  }
}