arcTo method

void arcTo(
  1. num x1,
  2. num y1,
  3. num x2,
  4. num y2,
  5. num radius,
)

The CanvasRenderingContext2D.arcTo() method of the Canvas 2D API adds a circular arc to the current sub-path, using the given control points and radius. The arc is automatically connected to the path's latest point with a straight line if necessary, for example if the starting point and control points are in a line.

This method is commonly used for making rounded corners.

Note: You may get unexpected results when using a relatively large radius: the arc's connecting line will go in whatever direction it must to meet the specified radius.

Implementation

external void arcTo(
  num x1,
  num y1,
  num x2,
  num y2,
  num radius,
);