## To do

### Both

* Colors, at least.  Textures!
* Display frame rate and polygon count in viewer.
* Feeback between frame rate and error bound.
* Decide whether we want coordinate-polymorphism (Float/Double).  Often
requires type annotations.  If not, do we wire in Float or Double?
* Revisit dependency on TypeCompose.
* Change this file to markdown mode (TODO.md) and use pandoc (via make) to
generate a prettier version.  And longlines mode as well.

### Conal

* Improve adaptive tessellation.  Account for perspective viewing and for
the nature of a parametric surface (e.g., derivative bounds).
* Blog about the AD stuff that uses linear maps

### Andy

* Get our demo working inside GHCi, in a way we can restart
* Work out how to use an Image as a 2D-texture
* Add a Text -> Image function (adaptive to error bound)


## Done

* Tablet, as an example
* General parametric surfaces with computed normals, using automatic
differentiation (AD).