public static void set_edge(QuadraticBezierCurve curve)
{
if (first)
{
writer.Write("M" + curve.begin_uv.x * scale + "," + (1 - curve.begin_uv.y) * scale);
first = false;
}
writer.Write(" Q" + curve.control_uv.x * scale + "," + (1 - curve.control_uv.y) * scale);
writer.Write(" " + curve.end_uv.x * scale + "," + (1 - curve.end_uv.y) * scale);
}
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);
}
}
