Draws a radial gradient starting at the center point of the specified path.
- macOS 10.5+
The path to fill.
The relative location within the bounding rectangle of
pathto use as the center point of the gradient’s end circle. Each coordinate must contain a value between -1.0 and 1.0. A coordinate value of 0 represents the center of the path’s bounding rectangle along the given axis. In the default coordinate system, a value of -1.0 corresponds to the bottom or left edge of the bounding rectangle and a value of 1.0 corresponds to the top or right edge.
The center point of the starting circle is the same as the center point of
path. The radius of the starting circle is 0, resulting in the starting circle being just a point.
The center point of the end circle starts at the center point of
path and is modified by the value in the
relative parameter. For example, if
relative contains the point (1.0, 1.0), the center of the end circle is located in the top-right corner of the path’s bounding rectangle. The radius of the end circle is set to the smallest value that ensures
rect is covered by the end circle.
The gradient formed by this method is clipped to