With Teigha you can create Non-Uniform Rational Basis Spline (NURBS) curves using the Teigha Ge library and its classes OdGeNurbCurve2d and OdGeNurbCurve3d.
Let’s consider a 3D version of a curve (2D curves have all the same behavior). A NURBS curve is defined by its order, a set of weighted control points, and a knot vector. This data can be set to a curve using a constructor:
Teigha Visualize has a mapping mechanism to use correct texture settings even when mapping coordinates are not present. In this tutorial, we’ll create a sphere and the texture will be set using mappers.
Let’s see how to create a ball.
Suppose we have a model and a database ID. Let’s get a pointer to the database, add an entity to this model, and append a sphere to it.
A polygon mesh can be of the surface fit type, which defines the polygon mesh using an approximation method to create an object that is more smooth. In Teigha, polygon mesh surface fit is provided by the following function:
