AbstractField -> Field
GLField.. -> FieldGLBUfferUChar
GLIsoSurface -> IsoSurfaceGL
IsoSurface -> IsoSurfaceCUDA
AbstractIsoSurface ->IsoSurface
AbstractWriter -> EmitterTriVtx
GLWriter -> EmitterTriVtxGL
TriangleVertexWriter -> EmitterTriVtxCUDA
reorganized file structure