按部就班來

1. Render Engine Study

PowerRender
- Expensive
- Too high level

TrueVision3D
- No low-level polygon command

Akika
- Collada supported (FCollada)
- No low-level polygon command
- I don't like C++ templates

Dreamotion3D
- good design reference for me
- too low-level

Torque
- Highly depend on scripting
- Extra shader work needed

Irrlicht
- poor collada support= =

2. Render Engine Implementation

2D raster (blit/strech/layer) - completed
3D view (rotate/pan/zoom) - completed
3D manipulation
- model (spin/move/scale) - completed
- face (spin/move/scale) - WIP
- edge (spin/move/scale) - WIP
- vertex (move) - WIP
- high-limited hierarchy? - WIP
Font raster - completed
UI - WIP
Function - WIP
SketchUp reader
Collada Support