Saturday, May 31, 2008

Prism objects for WWJ

Looking at the thematic mapping blog some time ago I saw a beautifulies KML examples of animated prism maps.
Prisms are goods to represent amounts with different shapes like countries or cylinders.

A couple of days ago I have started to work on a new renderable object Prism for WWJ, to allow WWJ community have this useful things. It is still in development but looks very well :)

Given a set of lat/lon positions you can create a prism object specifying the top elevation, color, etc.

It looks great, for to be honest has the same problem as the big brother GE has, the hole problem.

The vertex of polygon are extruded from globe surface to the specified height, but only the vertex not the polygon itself. Then, for big shapes, like China or Australia and using little heights, a hole can appear.

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