Drag the globe left or right to spin it around.


This sphere is a parametric surface that has been deformed by an image map.
The program uses one channel of an RGBA image for the height,
so later I'll be able to use the other channels for color.

pseudospheres.java and Matrix3D.java
The image file is spheremap2.png
It was easier to turn the image 90 degrees and invert it
than to change the way the mapping was performed. I'll fix it later.