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Daily Crap 2009-06-08

  1. Lazy day sketch from a while back. Requires the traer.physics library. Try clicking and pressing the any key and taking out some of the //comments.

    import traer.physics.*;

ParticleSystem physics;
Particle[][] particles;

void setup()
{
  size( 800, 600 );
  smooth();
  fill( 0 );
  frameRate( 24 );
  ellipseMode( CENTER );

  //physics = new ParticleSystem( 5.0, 0.05 );
  physics = new ParticleSystem( 0, 0, 0, 0.05 );

  particles = new Particle[100][10];

  for(int line = 0; line < particles.length; line++) {
    //particles[line][0] = physics.makeParticle( 1.0, width/2, height/2, 0 );
    particles[line][0] = physics.makeParticle( 1.0, random(width), random(height), 0 );
    //particles[line][0].makeFixed();
  }

  for(int line = 0; line < particles.length; line++) {
    for ( int i = 1; i < particles[line].length; ++i )
    {
      particles[line][i] = physics.makeParticle( 1.0, width/2, height/2+i, 0 );
      physics.makeSpring( particles[line][i-1],  particles[line][i], 2.0, 0.1, 0.01 );
    }
  }

  for(int line = 0; line < particles.length; line++)
    particles[line][particles[line].length-1].setMass( 5.0 );
}

int frame = 0;
void draw()
{
  frame++;
  //physics.setGravity(sin(frame/10.0), cos(frame/10.0), 0);
  physics.advanceTime( 1.0 );

  if ( mousePressed )
  {
    for(int line = 0; line < particles.length; line++) {
      particles[line][particles[line].length-1].moveTo( mouseX, mouseY, 0 );
      particles[line][particles[line].length-1].velocity().clear();
    }
  }

  background( 255 );

  fill(0);

  for(int line = 0; line < particles.length; line++) {
    beginShape();
    curveVertex( particles[line][0].position().x(), particles[line][0].position().y() );
    for ( int i = 0; i < particles[line].length; ++i )
      curveVertex( particles[line][i].position().x(), particles[line][i].position().y() );
    curveVertex( particles[line][particles[line].length-1].position().x(), particles[line][particles[line].length-1].position().y() );
    endShape();

    ellipse( particles[line][0].position().x(), particles[line][0].position().y(), 5, 5 );
    ellipse( particles[line][particles[line].length-1].position().x(), particles[line][particles[line].length-1].position().y(), 20, 20 );
  }
}

void mouseReleased()
{
  for(int line = 0; line < particles.length; line++)
    particles[line][particles[line].length-1].setVelocity( (mouseX - pmouseX), (mouseY - pmouseY), 0 );
}

void keyPressed()
{
  for(int line = 0; line < particles.length; line++)
    particles[line][particles[line].length-1].setVelocity( random(-100, 100), random(-100, 100), 0 );
}

Posted Jun 08, 2009, in the evening.

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