RasterWeb!

OK, we’ve finally got a bit of interaction going on… This sketch presents a blank canvas, until you click the mouse button, and then you get a circle filled with some random color. As you moved the mouse (with the button held down) it’ll make more circles and before you know it, you’re drawing!

See it in action here!

You can start over by pressing the ‘Q’ key, which will blank out the canvas. You can also adjust the size of the circle by using the up and down arrow keys.

/*
 * 20110506.pde
 */

void setup() {
  size(800,600);
  background(0);
}

color myColor = color(0,0,0);
int mySize = 50;

void draw() {
  fill(myColor);
  stroke(myColor);
  strokeWeight(1);
  
  if(keyPressed) {
    if (key == 'q' || key == 'Q') {
      background(0);
      myColor = color(0,0,0);
      mySize = 50;
    }
    if (key == CODED) {
      if (keyCode == UP) {
        mySize = mySize + 1;
      }
      else if (keyCode == DOWN) {
        mySize = mySize - 1;
      }
    }
    if (mySize < 1) {
      mySize = 1;
    }
    if (mySize > 800) {
      mySize = 800; 
    }
  }
  
}

void mouseClicked() {
  myColor = color(random(50,255), random(50,255), random(50,255));
}

void mouseDragged() {
  myColor = color(random(50,255), random(50,255), random(50,255));
  ellipse(mouseX, mouseY, mySize, mySize);
}

This is still a pretty minimal sketch. I did have to add in the upper and lower value limits on the size of the circle or things started to go in reverse if you held the key down too long.

Today’s Processing sketch features triangles of various shades flying upwards.

See it in action here!

Pretty simple, eh? The original sketch this came from actually had just one triangle (which I’ll call a ‘spaceship’) which had the x-axis controlled by an Arduino with a potentiometer. This one doesn’t have that.

/*
 * 20110505.pde
 */

void setup() { 
  size(800, 200); 
  frameRate(30);
} 

int yPos = 0; 

void draw() {
  
  background(0);
  stroke(255);
  fill(0);
 
  yPos = yPos - 3;
  if(yPos < 0) {
    yPos = height;
  }

  for (int i = 20; i < 790; i = i+20) {
    int yColor = i/3;
    if (yColor > 255) {
     yColor = 255; 
    }
    stroke(yColor);
    triangle(i, yPos, (i-5), (yPos+10), (i+5), (yPos+10));
  }
  
}

I’d like to go back to the single ship again, and work on adding a starfield which moves past the ship as it maintains it’s vertical position on the screen.

For our latest installment of Processing Month, we’ve got a lot of squares, er, rectangles. They overlap. They are semi-transparent.

See it in action here!

Another simple sketch, with randomness in it.

/*
 * 20110504.pde
 */

void setup() {
  size(800, 600);
  background(0);
}

float x = 50;
float y = 50;
int   c = 0;

void draw() {
      
      fill(random(0,200),random(0,200),random(0,200), 70);
      strokeWeight(0);
      rect(x, y, random(1,50), random(1,50));
      
      if (x > 650) {
        x = 50;
        y = y + 50;
      }
      else {
        x = x + 50;
      }
      
      if (y > 500) {
        y = 50;
        if (c > 500) {
          background(0);
          c = 0;
        }
        c++;
      }
}

It draws rectangles on top of rectangles on top of rectangles, and eventually clears the screen after enough iterations.

See any improvements you would make? Let me know…