Creates a new Scene. Takes an optional parameter primitives,
which initialized the scene with the given primitives instead
of creating an empty one.
Source
Scene([List<Primitive> primitives]) {
if (primitives != null) {
this.nonIdxPrimitives = new List<Primitive>.from(primitives);
} else {
this.nonIdxPrimitives = new List<Primitive>();
}
ccs = new CartesianCoordinateSystem();
}