Efficient Evaluation of Semi-Smooth Creases in Catmull-Clark Subdivision Surfaces

We present a sufficient condition based on the complex cell and star-shaped criteria for sam- pling a distance field so that the reconstruction maintains the topology of the

Before we consider the surface, case, we examine the simple problem of modifying the subdivision rules for a uniform cubic spline in the neighborhood of a single vertex v such that

The problem we address here is: How to fill such a hole in a Catmull & Clark surface with exactly n tensor product patches that meet the surrounding bicubic patch network and

In contrast with the natural parameterization of subdivision surfaces character- ized by diverging first order derivatives around extraordinary vertices of valence higher than four,

Later, Ba- jaj et al [BSWX02] developed different subdivision rules for hexahedral meshes, which generated deformations that were provably smooth everywhere except at vertices of

8 shows the sphere refraction images, comparing the smooth B-spline 3 with the traditional Catmull-Rom cubic convolution filter using three different sampling methods:

The notion of focal surface (loci of the principal curvature centers) is used to model smooth surfaces (via subdivision and interpolation) and to estimate principal curvatures

Very few sketch-based design systems are concerned with editing low-poly models, or with sketching control meshes for subdivision surfaces.. Much early work was on recogniz- ing