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|描述|| Draws a rectangle to the screen. A rectangle is a four-sided shape with every angle at ninety degrees. By default, the first two parameters set the location of the upper-left corner, the third sets the width, and the fourth sets the height. The way these parameters are interpreted, however, may be changed with the rectMode() function.
To draw a rounded rectangle, add a fifth parameter, which is used as the radius value for all four corners.
To use a different radius value for each corner, include eight parameters. When using eight parameters, the latter four set the radius of the arc at each corner separately, starting with the top-left corner and moving clockwise around the rectangle.
rect(a, b, c, d) rect(a, b, c, d, r) rect(a, b, c, d, tl, tr, br, bl)
Updated on October 2, 2018 05:02:08pm EDT