import traer.physics.*;

ParticleSystem physics;
Particle[][] particles;
int gridSize = 40;

void setup()
{
  size(400, 400);
  smooth();
 // noStroke();
  noFill();
  frameRate(60);
        
  physics = new ParticleSystem(0.5, 0.05);
  
  particles = new Particle[gridSize][gridSize];
  
  float gridStepX = (float) (width / gridSize);
  float gridStepY = (float) (height / gridSize);
  
  for (int i = 0; i < gridSize; i++)
  {
    for (int j = 0; j < gridSize; j++)
    {
      particles[i][j] = physics.makeParticle(0.2, sin(j/180*3.14) * 10 * gridStepX + (width / 4), cos(i/180*3.14) * 10 * gridStepY + 20, 0.0);
      if (j > 0)
      {
        physics.makeSpring(particles[i][j - 1], particles[i][j], 18.0, 0.01, gridStepX);
      }
    }
  }
  
  for (int j = 0; j < gridSize; j++)
  {
    for (int i = 1; i < gridSize; i++)
    {
      physics.makeSpring(particles[i - 1][j], particles[i][j], 18.0, 0.01, gridStepY);
    }
  }
  
  particles[0][0].makeFixed();
  particles[0][gridSize - 1].makeFixed();
  
  background(255);

}

void draw()
{
  physics.advanceTime(0.1);
  
 // if (mousePressed)
 // {
 for (int i = 0; i < gridSize; i++)
  {   
    particles[i][gridSize - 1].moveTo(mouseX, mouseY, 0);
    particles[i][0].moveTo(mouseY, mouseX, 0);
  }
  //  particles[0][gridSize - 1].velocity().clear();
 // }
  
  background(255);
  
  // vizszintes
  for (int i = 0; i < gridSize; i++)
  {
    stroke(i,i,i,200-i*5);
    beginShape( POLYGON );
    curveVertex(particles[i][0].position().x(), particles[i][0].position().y());
    for (int j = 0; j < gridSize; j++)
    {
      curveVertex(particles[i][j].position().x(), particles[i][j].position().y());
    }
    curveVertex(particles[i][gridSize - 1].position().x(), particles[i][gridSize - 1].position().y());
    endShape();
  }
 /* for (int j = 0; j < gridSize; j++)
  {
    beginShape( POLYGON );
    curveVertex(particles[0][j].position().x(), particles[0][j].position().y());
    for (int i = 0; i < gridSize; i++)
    {
      curveVertex(particles[i][j].position().x(), particles[i][j].position().y());
    }
    curveVertex(particles[gridSize - 1][j].position().x(), particles[gridSize - 1][j].position().y());
    endShape();
  }*/
  loadPixels();
  color c;
  for (int i=0;i<width;i++)  {
    for (int j=0;j<height;j++)  {
       c=pixels[i+j*width]-6;
       pixels[i+j*width]=color(red(c)+10,green(c)+5,blue(c)+5);
    }
  }
  updatePixels();
}

void mouseReleased()
{
 // particles[0][gridSize - 1].setVelocity( (mouseX - pmouseX), (mouseY - pmouseY), 0 );
}