AnalyticalGraphicsInc/cesium — pull request #210 by pjcozzi (2012-09-06 19:06:59+00:00)
Title: Some sensor doc

I was going to add a `showBody` property to sensors so we could only draw their intersection with the central body, but then I relized it is easy to do with the default material:
```javascript
s.material.uniforms.color.alpha = 0.0;
```
so, once again, I provide a consolation prize of some reference doc.