public static optional <TextAsset> render(PlanetariaCollider collider, float width)
{
VectorGraphicsWriter.begin_canvas();
VectorGraphicsWriter.begin_shape();
BlockRendererIterator.prepare(collider);
foreach (ArcIterator arc_iterator in BlockRendererIterator.arc_iterator())
{
ShapeRenderer.partition_arc(arc_iterator.arc, arc_iterator.begin, arc_iterator.end);
}
VectorGraphicsWriter.end_shape(Color.black, width);
return(VectorGraphicsWriter.end_canvas());
}
private static void subdivide(Arc arc, float begin_point_angle, float end_point_angle)
{
float middle_point_angle = max_error_location(arc, begin_point_angle, end_point_angle);
Vector3 begin = arc.position(begin_point_angle);
Vector3 middle = arc.position(middle_point_angle);
Vector3 end = arc.position(end_point_angle);
OctahedronUVCoordinates begin_point = new NormalizedCartesianCoordinates(begin);
OctahedronUVCoordinates middle_point = new NormalizedCartesianCoordinates(middle);
OctahedronUVCoordinates end_point = new NormalizedCartesianCoordinates(end);
if (PlanetariaMath.point_line_distance(begin_point.data, end_point.data, middle_point.data) > Precision.threshold) // if the max error is greater than a threshold, recursively add the left and right halves into the list of lines
{
subdivide(arc, begin_point_angle, middle_point_angle);
subdivide(arc, middle_point_angle, end_point_angle);
}
else
{
QuadraticBezierCurve curve = new QuadraticBezierCurve(begin_point.data, middle_point.data, end_point.data);
VectorGraphicsWriter.set_edge(curve);
}
}