The keyPressed() Function

• • Watch FunProgramming [video 21]

  • Here’s a program I wrote:

float x_value;

void setup()

{

size(400,400);

background(0);

stroke(255);

}

void draw()

{

x_value = (x_value+20) % 400;

line(x_value, 100, x_value+15, 300);

}

void keyPressed()

{

if ( key == 'x' )

{

stroke(random(255),random(255),random(255));

}

}

• • Type it in and run it - what happens when you hit the “x” key?

  • Change the program so that when type “r” the lines turn red, “g” - green, or “b” - blue

  • Change to program so that “f” makes the lines fatter.

  • Show a mentor, mark the board and get a prize