SpotLightHelper constructor

SpotLightHelper(Light light, Color? color)

Implementation

SpotLightHelper(this.light, this.color) : super() {
  light.updateMatrixWorld(false);

  matrix = light.matrixWorld;

  var geometry = BufferGeometry();

  List<double> positions = [
    0,
    0,
    0,
    0,
    0,
    1,
    0,
    0,
    0,
    1,
    0,
    1,
    0,
    0,
    0,
    -1,
    0,
    1,
    0,
    0,
    0,
    0,
    1,
    1,
    0,
    0,
    0,
    0,
    -1,
    1
  ];

  for (var i = 0, j = 1, l = 32; i < l; i++, j++) {
    var p1 = (i / l) * Math.PI * 2;
    var p2 = (j / l) * Math.PI * 2;

    positions.addAll(
        [Math.cos(p1), Math.sin(p1), 1, Math.cos(p2), Math.sin(p2), 1]);
  }

  geometry.setAttribute(
      'position',
      Float32BufferAttribute(Float32Array.from(positions), 3, false));

  var material = LineBasicMaterial({"fog": false, "toneMapped": false});

  cone = LineSegments(geometry, material);
  add(cone);

  update();
}