All samples are written in AS3 and can be built with Adobe Flex Compiler (mxmlc) as part of Flex Eclipse Environment project or at command line.
Basic concept of Cast3D is intended to minimize coding efforts such that creation of animated 3D scene requires very little or not coding at all. All information about scene and animation is provided by Cast3d xml file (.X3c). Where do I get this file? The answer is, import from 3D modeling tools, for example 3dSMax. ( import utilities for other are coming soon.)
Just be careful what are importing, some models could be too big to handle with Flash. Decent size scene that would animate well is about 3-5K polygons. I you go for more you might expect visible slowdown in rendering. Beyond 15K polygons, animations virtually stalls and might need to simplify 3D scene. Limitations are mostly related to Flash rendering pipeline and rendering engine. Cast3D animation itself is relatively lightweight.