Light blue color code for processing11/23/2023 ![]() If you want to disable the fill altogether, use noFill(). When you write a fill() function, every shape after that’s filled in the specified colour – that’s, up until the next fill() line. You’ll be introduced to some others soon. Processing’s rect() is one of its many drawing functions. Note that top-left corner of the rectangle is placed at the x/y coordinate. fill ( '#FF0000' ) rect ( 100, 150, 200, 300 ) The green lines and numbers represent the rect()'s four measurements/arguments. Add the following code to your “hello_world” sketch then run it to confirm that the output matches the image below. ![]() The x-coordinate values begin at the left-edge of the display window and the y-coordinate from the top edge. Rect(x_coordinate, y_coordinate, width, height) The rect() function is used to draw rectangles (or squares) and takes four arguments: To see the fill colour in effect, add a rectangle. For hexadecimal use the 6-digit value prefixed with a # and wrap it in quotes. It accommodates up to four arguments, depending on the colour system you are using. The fill() function sets the colour used to fill shapes. Also, remember that you are mixing light, so #FFFFFF is white, and #000000 is black. For reasons I won’t get into here, FF is the equivalent of 100%. – the FF represents red the middle 00 green and right-most 00 blue. Each pair corresponds to a primary colour. A hexadecimal colour value is comprised of 6 hexadecimal digits ( 0,1,2 … E,F) and can be split into three pairs. Screens rely on three primaries to mix colours, namely red, green, and blue. The hexadecimal value is the one prefixed with a #. To access this, select Tools > Color Selector… The Processing Colour Selector. Processing includes its own colour selector. If you are familiar with graphics software like Adobe Photoshop, Illustrator, Inkscape, or Gimp, you’ll have seen these values in your colour mixer. To keep things simple, we’ll stick with hexadecimal values for the first tutorial. There are various ways to specify colour in Processing.
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