Programming for Poets 2010-05-06
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We began with the"getting started" tutorial
http://processing.org/learning/gettingstarted/
We covered a little about
- coordinate system
- variables
- program flow
- functions
And finished by editing a simple "pong paddle" program:
void setup() { // size of our drawing window size(400, 400); // set the background color to gray background(128); } void draw() { // draw with a gray border stroke(128,128,128); // draw over the box we drew last time (at old mouse pos) fill(128); // gray drawbox(pmouseX,pmouseY); fill(255); //white // draw the new box at the new mouse position drawbox(mouseX,mouseY); } // draw a paddle-shaped box at the given coordinates void drawbox(int x, int y) { rect(30,y,10,40); }
Suggested homework:
The position of your pong paddle is controlled by the y variable. Make the color of your paddle change with the x position.
[If you want to learn more about color, this is a *great* explanation: http://processing.org/learning/color/ What happens when you use colorMode(HSB,255)?
Extra credit: make a happy face follow the mouse using the ellipse() and arc() functions. It will help to look up arc() in the reference.