HemisphereLightHelper constructor
HemisphereLightHelper(
- Light light,
- double size, [
- Color? color
light
- The light being visualized.
size
- The size of the mesh used to visualize the light.
color
- (optional) if this is not the set the helper will take
the color of the light.
Implementation
HemisphereLightHelper(this.light, double size, [this.color]) : super() {
light.updateMatrixWorld(false);
matrix = light.matrixWorld;
matrixAutoUpdate = false;
final geometry = OctahedronGeometry(size);
geometry.rotateY(math.pi * 0.5);
material = MeshBasicMaterial.fromMap({"wireframe": true, "fog": false, "toneMapped": false});
if (color == null) material?.vertexColors = true;
final position = geometry.getAttributeFromString('position');
final colors = Float32List(position.count * 3);
geometry.setAttributeFromString('color', Float32BufferAttribute.fromList(colors, 3, false));
add(Mesh(geometry, material));
update();
}