update method

void update()

Implementation

void update() {
	final start = count;
	final end = geometry.drawRange['count']!;

	if ( start == end ) return;

	positions.updateRange!['offset'] = start * 3;
	positions.updateRange!['count'] = ( end - start ) * 3;
	positions.needsUpdate = true;

	normals.updateRange!['offset'] = start * 3;
	normals.updateRange!['count'] = ( end - start ) * 3;
	normals.needsUpdate = true;

	colors.updateRange!['offset'] = start * 3;
	colors.updateRange!['count'] = ( end - start ) * 3;
	colors.needsUpdate = true;

	count = geometry.drawRange['count']!;
}