Draws a quadratic bezier curve from the current location, though the
two given points.
The current position is then set to the point defined by the
x2 and y2 parameters.
Parameters
- x1
x-coordinate of the first point.
- y1
y-coordinate of the first point.
- x2
x-coordinate of the second point.
- y2
y-coordinate of the second point.
Return Values
No value is returned.