PlaneProjection
is this Deep Zoom 'tile pyramid visualizer'...
[fullsize image] [try it out]
Rather than just play around with the
RotationX
and RotationY
properties, GlobalOffsetZ
is used to 'push back' the larger images to sit 'behind' the smaller, foremost imageCenterOfRotation
is set toGlobalOffsetZ * -1
so that all the images rotate around the same pointRotationY
is then used to rotate them all together
Here are some diagrams to explain what that all means:
Firstly, each 'layer' in a Deep Zoom image is double the the size of the previous one (height/width) so when they three layers are rendered on top of each other, you can clearly see the size differences:

However when we apply the
PlaneProjection
to move the larger images along the Z axis (ie. in/out of the page) we can create the effect that all three images are the 'same size'. 
Altering the
PlaneProjection
attributes listed about let's us zoom and rotate the pyramid to get a totally useless but kinda cool looking view of a Deep Zoom tile pyramid...UPDATE: For those without Silverlight 3.0 installed, I've recorded (my first!) screencast demo (sorry it's in Flash - something to figure out another time...)
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