/*
  tree
  Created with Processing 68 alpha on Octover 13 , 2004
  http://www.harukit.com/
*/

float leng;
float rad=40;
int level=6;
float gain=0.545;

void setup(){
  size(500,500);
  background(0);
  stroke(0,255,100,70);
  leng=height*gain*gain;
}

void loop(){
  background(0);
  translate(width/2,leng+50,-100);
  rotateY(radians((mouseX-width/2)*0.6));
  rad=mouseY*0.1;
  line(0,150,0,300);
  drawLine(rad,leng,level);
  drawLine(-rad,leng,level);
}

void keyPressed(){
  switch(key){
    case '1':
    level=6;
    break;
    case '2':
    level=7;
    break;
    case '3':
    level=8;
    break;
    case '4':
    level=9;
    break;
    case '5':
    level=10;
    break;
  }

}

void drawLine(float rad,float leng,int level){
  push();
  translate(0,leng);
  push();
  rotate(radians(rad));
  line(0,0,0,-leng);
  pop();
  rotate(radians(-rad));
  line(0,0,0,-leng);
  translate(0,-leng*(1+gain));
  level-=1;
  if(level>1){
    drawLine(rad,leng*gain,level);
    drawLine(-rad,leng*gain,level);
  }
  pop();
  push();
  rotateY(radians(45));
  translate(0,leng);
  push();
  rotate(radians(rad));
  line(0,0,0,-leng);
  pop();
  rotate(radians(-rad));
  line(0,0,0,-leng);
  translate(0,-leng*(1+gain));
  level-=1;
  if(level>1){
    drawLine(rad,leng*gain,level);
    drawLine(-rad,leng*gain,level);
  }
  pop();
  push();
  rotateY(radians(90));
  translate(0,leng);
  push();
  rotate(radians(rad));
  line(0,0,0,-leng);
  pop();
  rotate(radians(-rad));
  line(0,0,0,-leng);
  translate(0,-leng*(1+gain));
  level-=1;
  if(level>1){
    drawLine(rad,leng*gain,level);
    drawLine(-rad,leng*gain,level);
  }
  pop();
  push();
  rotateY(radians(135));
  translate(0,leng);
  push();
  rotate(radians(rad));
  line(0,0,0,-leng);
  pop();
  rotate(radians(-rad));
  line(0,0,0,-leng);
  translate(0,-leng*(1+gain));
  level-=1;
  if(level>1){
    drawLine(rad,leng*gain,level);
    drawLine(-rad,leng*gain,level);
  }
  pop();
}