import turtle3d.*;


TurtleP3D t = new TurtleP3D(this);

// variable to rotate drawing around the y axis
float rotx = 0;
float roty = 0;



void setup() {
  size(400, 300, P3D);
  
  // we only need to run the turtle once so for now do it here
  hilbert(10,4);
}



void draw(){
background(255);

// The turtle colour is set here. Turtle3D has no colour method yet
stroke(70);
noFill();
rect(1,1,width-2, height-2);
translate(width/2.0, (height/2.0), -100);
// rotate around the y axis
rotateX(rotx);
rotateY(roty);
// draws lines from points in a buffer, no arguments yet.
smooth();
t.render();
}




void mouseDragged() {
  float rate = 0.01;
  rotx += (pmouseY-mouseY) * rate;
  roty += (mouseX-pmouseX) * rate;
}


void hilbert (float hSize, int hLevel){
if (hLevel > 0)
  {
int newhLevel = hLevel - 1;
float newhSize = hSize+2;
t.pitch(-90);
t.roll(-90);
hilbert(newhSize, newhLevel);
t.forward(hSize);
t.pitch(-90);
t.roll(-90);
hilbert(newhSize, newhLevel);
t.forward(hSize);
hilbert(newhSize, newhLevel);
t.yaw(-90);
t.forward(hSize);
t.pitch(-90);
t.roll(90);
t.roll(90);
hilbert(newhSize, newhLevel);
t.forward(hSize);
hilbert(newhSize, newhLevel);
t.pitch(90);
t.forward(hSize);
t.yaw(90);
t.roll(90);
t.roll(90);
hilbert(newhSize, newhLevel);
t.forward(hSize);
hilbert(newhSize, newhLevel);
t.yaw(-90);
t.forward(hSize);
t.roll(90);
hilbert(newhSize, newhLevel);
t.yaw(-90);
t.roll(90);
  }
}