Manga Linework #2; Perception

N020_MangaLinework002

/*
 * [020] Manga Linework #2; Perception
 *
 * 2013 [+++] @tinytintoto
 */
LineworkDrawer ld = new LineworkDrawer();
PVector center_loc;

void setup() {
  size( 500, 280 );
  smooth();
  background( 255 );
  frameRate( 15 );
  fill( 0 );
  noStroke();
  
  center_loc = new PVector( 0, height );
}

void draw() {
}

void mouseReleased() {
  ld.perception( center_loc, new PVector(mouseX, mouseY) );
}

void mousePressed() {
  center_loc.x = mouseX;
  center_loc.y = mouseY;
}

class LineworkDrawer {
  LineworkDrawer() {
  }

  public void perception( PVector loc, PVector direction ) {
    float tremor, range = PI * 0.6, in_r_scale = 0.85;
    int step = 17;
    ArrayList<PVector> in_vertexes = new ArrayList<PVector>();
    PVector position = new PVector(direction.x - loc.x, direction.y - loc.y);
    position.rotate( -(range/2) );
    
    beginShape();
    for ( int i = 0; i < step; i++ ) {
      float x, y;
      x = ( position.x * ( 0.7 + 0.3 * ( 1 - i % 2 ) ) );
      y = ( position.y * ( 0.7 + 0.3 * ( 1 - i % 2 ) ) );
      PVector pos = new PVector( x, y );
      pos.mult( map( ( step/2 - abs( ( step / 2 ) - i ) ), 0, step/2, 0.75, 1 ) );
      
      vertex( pos.x + loc.x, pos.y + loc.y );
      
      position.rotate( range/step );
      
      if( i < step - 1 ){
        in_r_scale = map( ( step/2 - abs( ( step / 2 ) - i ) ), 0, step/2, 0.9, 0.85 );
        in_vertexes.add( new PVector( pos.x * in_r_scale, pos.y * in_r_scale ) );
      }
    }
    
    for( int i = in_vertexes.size() - 1; i > 0; i-- ){
      PVector pos = (PVector) in_vertexes.get(i);
      vertex( pos.x + loc.x, pos.y + loc.y );
      in_vertexes.remove(i);
    }
    endShape();
  }
}