// 10 Lines
// Paul Bartlett
// 18 Sept 2007

float[][] lineData;
float[]  goal;
float[]  velocity;
float  velScale = 0.0007;
int pad = 22;

void setup(){
  size(640,480);
  frameRate(50);
  stroke(255);
  strokeWeight(3);
  smooth();

  // Setup line position & velocity arrays
  lineData = new float[4][10];
  goal = new float[10];
  velocity = new float[10];
  for(int L=0; L<10; L++){
    lineData[0][L]=0;
    lineData[1][L]=height/11+L*height/11;
    lineData[2][L]=0;
    lineData[3][L]=height/11+L*height/11;
    velocity[L] = 0;
  }
}

void draw(){
  background(0);
  // Set the goal points for each line as the mouse passes 
  for(int m=0; m<10; m++){
    if(mouseY < height/11+m*height/11+pad && mouseY > height/11+m*height/11-pad){
      goal[m]=mouseX;
    }
  }

  // Animate the lines
  for(int r=0; r<10; r++){
    velocity[r] = velScale*(goal[r] - lineData[2][r])*abs(goal[r] - lineData[2][r]);
    lineData[2][r]=lineData[2][r]+velocity[r];
    line(lineData[0][r],lineData[1][r],lineData[2][r],lineData[3][r]);
  }
}