Dave Drohan (SETU)

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Mouse Example 3.8

In this step, we will implement an example from your lecture.

• Draw a circle on the mouse (x,y) coordinates.

• Each time you move the mouse, draw a new circle.

• All the circles remain in the sketch until you press a mouse button.

• When you press a mouse button, the sketch is cleared and a single circle is drawn at the mouse (x,y) coordinates.

Mouse Example 3.8

Create a new Processing sketch in your workspace and call it Example_3_8.

Enter the following code into your sketchbook (avoid the temptation to copy and paste it…you learn more by writing the code out):

void setup() {
  size(500,400);
  background(0);
}

void draw() {
 
  if (mousePressed) {
    background(0);
  }

  stroke(255);
  fill(45,45,45);
  ellipse(mouseX, mouseY, 100, 100);
}

• Run your code. Does it work as you would expect?