"""
 * Move Eye. 
 * by Simon Greenwold.
 * 
 * The camera lifts up (controlled by mouseY) while looking at the same point.
 """
def setup(): 
    size(640, 360, P3D)
    fill(204)
    
def draw(): 
    lights()
    background(0)
    
    # Change height of the camera with mouseY
    camera(30.0, mouseY, 220.0, # eyeX, eyeY, eyeZ
           0.0, 0.0, 0.0,       # centerX, centerY, centerZ
           0.0, 1.0, 0.0)       # upX, upY, upZ
    
    noStroke()
    box(90)
    stroke(255)
    line(-100, 0, 0, 100, 0, 0)
    line(0, -100, 0, 0, 100, 0)
    line(0, 0, -100, 0, 0, 100)
