p5.js | arc() Function

The arc() function is an inbuilt function in p5.js which is used to draw an arc. This function accepts seven parameters which are x-ordinate, y-ordinate, width, height, start, stop and an optional parameter mode.

Syntax:

arc(x, y, w, h, start, stop, mode)

Parameters: This function accepts seven parameters as mentioned above and described below:

• x: This parameter is used to hold the value of x-coordinate of the arc of ellipse.
• y: This parameter is used to hold the value of y-coordinate of the arc of ellipse.
• w: This parameter takes the value of width of the arc of ellipse.
• h: This parameter takes the value of height of the arc of ellipse.
• start: This parameter takes the value of angle to start the arc, specified in radians.
• stop: This parameter takes the value of angle to stop the arc, specified in radians.
• mode: This is an optional parameter which determines the way of drawing the arc either CHORD, PIE or OPEN

• Program 1: This program uses the DEFAULT mode.

  function setup() {
      createCanvas(400, 400);
  }
  
  function draw() {
      background('gray');
  
      // Quarter arc at 150, 55 of height and width 290px
      arc(150, 55, 290, 290, 0, HALF_PI);
      fill('lightblue');
  }

  Output:
  

• Program 2: This program uses the OPEN mode.

  function setup() {
      createCanvas(400, 400);
  }
  
  function draw() {
      background(220);
      fill('lightgreen');
  
      // An open arc at 150, 150 with radius 280
      arc(150, 150, 280, 280, 0, PI + QUARTER_PI, OPEN);
  }

  Output:
  

• Program 3: This program uses the CHORD mode.

  function setup() {
      createCanvas(400, 400);
  }
  
  function draw() {
      background(220);
      fill('orange');
  
      // A chord-arc at 150, 150 with radius 280
      arc(150, 150, 280, 280, 0, PI + QUARTER_PI, CHORD);
  }

  Output:
  

• Program 4: This program uses PIE mode.

  function setup() {
      createCanvas(400, 400);
  }
  
  function draw() {
      background(220);
      fill('blue');
  
      // A pie-arc at 150, 150 with radius 280
      arc(150, 150, 280, 280, 0, PI + QUARTER_PI, PIE);
  }

  Output:
  

References: https://p5js.org/reference/#/p5/arc