Engraving a 2D image on a subdivision surface

A non-transitory data storage medium having recorded thereon a computer program comprising instructions for performing a method for designing a 3D modeled object, the method comprising:

• defining a base mesh associated to a subdivision surface and to a corresponding predetermined mesh-to-NURBS-surface conversion algorithm, the subdivision surface representing the 3D modeled object;
• defining a 2D image and a location for engraving the 2D image on the subdivision surface;
• and
• determining a non-uniform rational basis spline (NURBS) surface that corresponds to applying a deformation map on the result of performing the mesh-to-NURBS-surface conversion algorithm to the base mesh, the deformation map including displacement vectors provided for positions of the result of performing the mesh-to-NURBS-surface conversion algorithm to the base mesh, the positions corresponding to the location for engraving the 2D image, the displacement vectors being computed based on corresponding pixel values of the 2D image, the corresponding pixel values being pixel attribute values that represent a local detail, the displacement vectors being computed as a function of the pixel attribute values.

A CAD system comprising a processor coupled to a GUI and to a non-transitory memory, the memory having recorded thereon a computer program comprising instructions for performing a method for designing a 3D modeled object, the method comprising:

• defining a base mesh associated to a subdivision surface and to a corresponding predetermined mesh-to-NURBS-surface conversion algorithm, the subdivision surface representing the 3D modeled object;
• defining a 2D image and a location for engraving the 2D image on the subdivision surface;
• and
• determining a non-uniform rational basis spline (NURBS) surface that corresponds to applying a deformation map on the result of performing the mesh-to-NURBS-surface conversion algorithm to the base mesh, the deformation map including displacement vectors provided for positions of the result of performing the mesh-to-NURBS-surface conversion algorithm to the base mesh, the positions corresponding to the location for engraving the 2D image, the displacement vectors being computed based on corresponding pixel values of the 2D image, the corresponding pixel values being pixel attribute values that represent a local detail, the displacement vectors being computed as a function of the pixel attribute values.