Static p5_sys::global::constrain

pub static constrain: ConstrainInternalType

Constrains a value between a minimum and maximum value.

Examples

function draw() {
  background(200);

  let leftWall = 25;
  let rightWall = 75;

  // xm is just the mouseX, while
  // xc is the mouseX, but constrained
  // between the leftWall and rightWall!
  let xm = mouseX;
  let xc = constrain(mouseX, leftWall, rightWall);

  // Draw the walls.
  stroke(150);
  line(leftWall, 0, leftWall, height);
  line(rightWall, 0, rightWall, height);

  // Draw xm and xc as circles.
  noStroke();
  fill(150);
  ellipse(xm, 33, 9, 9); // Not Constrained
  fill(0);
  ellipse(xc, 66, 9, 9); // Constrained
}

Parameters

n number to constrain

low minimum limit

high maximum limit