View Dialog Help
				  for
			   Picaso Version 1.0

Location: This is where the view port location is in 3D space.
	  Refer to the coordinate system above the example for 
	  details about the coordinate system.

Direction: This is the Direction your looking relative to the Up,
	   right, and location points and axis. NOTE you will hardly
	   ever have to change these values they are automatically 
	   calculated. 

LookAt: This is where the ViewPort will always point at you can change
	the location, and the camera will always point to this 3D point
	in space.  NOTE you can disable auto view port calculations by
	unchecking the Calculate LookAt checkbox.

Up: This is the up direction of the scene. This is automatically calculated
    just like direction is.

Right: This is the direction right is at.  By changing the x axis you
       can compensate for the aspect ratio of the screen. However
       this is done automatically.

Sky: This is the direction the sky is from the center of the view port.
    

OK Button: This accepts the changes and if the Calculate LookAt checkbox
	   is checked it will calculate Direction, Up, and Right axis's
	   based on the current location sky position, and look at point.

Cancel Button: Ignores all changes and doesn't calculate the new viewport
	       position.

Calculate LookAt: This enables if checked the auto calculation of 
		  Direction, Up, and Right axis's. If not checked it doesn't
		  calculate these axis's.


Coordinate System:	      Above	
			       +Y  +Z Farther
				|  /
				| /
				|/
		     Left -X----0----X+ Right
			       /|
			      /	|
			     /	|
		    Closer -Z  -Y
			      Below 

			
Example: The Default view port looks forward from 100 units in front of
	 the center of the scene. About 1/2 unit down from the center
	 and 0 units to the left or right.  

			
				
				0 Center of the Universe
			       /
                              /
        		     /
	              |-----/-| X = 0
	              |    /  |	Y = -0.5
		      |	      | Z = -100
		      |-------|

	
	Let's say we put a sphere at X = 0, Y = 0, Z = 0, and a light
	at x = 0, y = 100, z = -110. wee would see the sphere right in 
	front of us about in the center of the screen.  Now lets say
	we wanted to look directly down on the sphere. All we have to do
	is move our location to X = 0, Y = 100, Z = -0.0001 note we cannot
	have the Y or Z values of the location ever = 0 or we will get
	a floating point error, but the program will adjust the value to
	1 if it detects a zero in either numbers. Now make sure LookAt 
	equals X = 0, Y = 0, and Z = 0, so we are looking at the sphere
	at X = 0, Y = 0, Z = 0. Now trace the image you will now be looking
	down on the sphere. Experiment with the location and Sky numbers
	and see what interesting views you can come up with.