##:@* snow
##<load file=web3d-navigate>

##@ HUD

Transform {
translation 0 0 15 
children [

Transform {
    translation  0 4 -35
    scale        3 3  3

   children [
	# 1 shape as child node
	Shape {
           appearance Appearance {
               material Material {
                   diffuseColor  1 1 1
                   emissiveColor 1 1 1
               }
           }
 	   geometry PointSet {
	      # declare some points (x,y,z)
		coord DEF PointBoxCoords Coordinate {
		   point [ ]
		}
	   }
      }
   ]
}

DEF AnimationTimer TimeSensor { 
   startTime 0		# Start immediately
   cycleInterval 20     # One timing loop takes 20 seconds
   loop TRUE		# Keep on generating timing events
}

# Script for initializing the box with points at startup
# and animating them like stars
DEF PointBoxScript Script {
   eventOut MFVec3f point_changed
   eventIn  SFFloat set_fraction
   # The array of points
   field    MFVec3f point 0.0 0.0 0.0

   # Number of points to generate
   field    SFInt32 PointCount 600
   url "javascript:
   function initialize()
   {  
	// Number of points
	point.length = PointCount;
	
	for (i=0; i < PointCount; i++) 
	{  
	    point[i].x = (Math.random() - 0.5)*16;
            point[i].y = Math.random() * 8;
            point[i].z = Math.random() * 10;
	}
	// Send the points to the empty geometry
	point_changed = point;
   }
   function set_fraction(value)
   {
      for (i=0; i < PointCount; i++) 
	{  point[i].y = point[i].y - 0.1;
         if (point[i].y < 0) 
            point[i].y = point[i].y + 8;
	}
	// Send the points to the empty geometry
	point_changed = point;
   }
   "
}

ROUTE PointBoxScript.point_changed TO PointBoxCoords.set_point
ROUTE AnimationTimer.fraction_changed TO PointBoxScript.set_fraction


] }

##</>