Name
rect[]
Description
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.
Examples
size[400, 400]; rect[120, 80, 220, 220];
size[400, 400]; rect[120, 80, 220, 220, 28];
size[400, 400]; rect[120, 80, 220, 220, 12, 24, 48, 72];
Syntax
rect[a, b, c, d]
rect[a, b, c, d, r]
rect[a, b, c, d, tl, tr, br, bl]
Parameters
a
[float]
x-coordinate of the rectangle by defaultb
[float]
y-coordinate of the rectangle by defaultc
[float]
width of the rectangle by defaultd
[float]
height of the rectangle by defaultr
[float]
radii for all four cornerstl
[float]
radius for top-left cornertr
[float]
radius for top-right cornerbr
[float]
radius for bottom-right cornerbl
[float]
radius for bottom-left corner
Related
Name
rectMode[]
Description
Modifies the location from which rectangles are drawn by changing the way in which parameters given to rect[] are interpreted.
The default mode is rectMode[CORNER], which interprets the first two parameters of rect[] as the upper-left corner of the shape, while the third and fourth parameters are its width and height.
rectMode[CORNERS] interprets the first two parameters of rect[] as the location of one corner, and the third and fourth parameters as the location of the opposite corner.
rectMode[CENTER] interprets the first two parameters of rect[] as the shape's center point, while the third and fourth parameters are its width and height.
rectMode[RADIUS] also uses the first two parameters of rect[] as the shape's center point, but uses the third and fourth parameters to specify half of the shape's width and height.
The parameter must be written in ALL CAPS because Processing is a case-sensitive language.
Examples
size[400, 400]; rectMode[CORNER]; // Default rectMode is CORNER fill[255]; // Set fill to white rect[100, 100, 200, 200]; // Draw white rect using CORNER mode rectMode[CORNERS]; // Set rectMode to CORNERS fill[100]; // Set fill to gray rect[100, 100, 200, 200]; // Draw gray rect using CORNERS mode
size[400, 400]; rectMode[RADIUS]; // Set rectMode to RADIUS fill[255]; // Set fill to white rect[200, 200, 120, 120]; // Draw white rect using RADIUS mode rectMode[CENTER]; // Set rectMode to CENTER fill[100]; // Set fill to gray rect[200, 200, 120, 120]; // Draw gray rect using CENTER mode
Parameters
mode
[int]
either CORNER, CORNERS, CENTER, or RADIUS
Related
Name
square[]
Description
Draws a square to the screen. A square is a four-sided shape with every angle at ninety degrees and each side is the same length. By default, the first two parameters set the location of the upper-left corner, the third sets the width and height. The way these parameters are interpreted, however, may be changed with the rectMode[] function.
Examples
Syntax
square[x, y, extent]
Parameters
x
[float]
x-coordinate of the rectangle by defaulty
[float]
y-coordinate of the rectangle by defaultextent
[float]
width and height of the rectangle by default