rectMode(mode)

Modifies the location from which rectangles or text frames draw. The default mode is rectMode(CORNER), which specifies the location to be the upper left corner of the shape and uses the w and h parameters to specify the width and height. The syntax rectMode(CORNERS) uses the x and y parameters of rect() or text() to set the location of one corner and uses the w and h parameters to set the opposite corner. The syntax rectMode(CENTER) draws the shape from its center point and uses the w and h parameters to specify the shape’s width and height. The syntax rectMode(RADIUS) draws the shape from its center point and uses the w and h parameters to specify half of the shape’s width and height.