Here are the data structures with brief descriptions:

CALG3D_Circle	Data type for a 3D-circle
CALG3D_Cone	Data type for a cone
CALG3D_Cylinder	Data type for a cylinder
CALG3D_Ellipse	Data type for a 3D-Ellipse
CALG3D_Intersection	Intersection between a ray and a triangle mesh
CALG3D_Line	Data type for a 3D-line
CALG3D_Plane	Data type for a plane
CALG3D_Point3d	Data type for 3d points/vectors with a user-defined pointer
CALG3D_Sphere	Data type for a sphere
CALG3D_Superellipse	Data type for a 3D-superellipse (Lamé-curve)
CALG3D_Torus	Data type for a torus
CicpMultiViewParam	MultiView-ICP input parameters
CicpMultiViewTransformations	MultiView-ICP transformations
CicpParam	ICP input parameters
CicpResult	ICP result parameters