Rectangle rotating around the mouse pointer

• • Watch Fun Programming [video 29]

  • Here’s Mr. Fun’s program. Type in into Processing and run it.

float r = 0;

void setup()

{

size(400,400);

fill(0,0,255);

rectMode(CENTER);

noStroke();

smooth();

}

void draw()

{

fill(0,0,255,50);

rect(width/2,height/2,width, height);

translate(mouseX,mouseY);

rotate(r);

fill(255);

rect(0,0,100,100);

r = r+0.05;

}

• • Change the program to make the rectangle half as big

  • Change program to make the rectangle spin slower

  • Change the program to make the rectangle spin just below the mouse pointer

  • Change the program to make a “ghost trail” (slower fade out effect) when you move the mouse

  • Change the program to make the rectangle change color based on mouse position - purple if you are on the left side of the screen, orange if you are on the right side of the screen

  • Show a mentor, mark the board and claim a prize.