Point rendering of non-manifold surfaces with features

Abstract

We are concerned with producing high quality images of implicit surfaces, in particular those with non-manifold features. In this work we present a point based technique that improves the rendering of non-manifold implicit surfaces by using point and gradient information to prune plotting nodes resulting from using octree spatial subdivision based on the natural interval extension of the surface's function.The use of intervals guarantees that no parts of the surfaces are missed in the view volume and the combination of point and gradient sampling preserves this feature while greatly enhacing the quality of point based rendering of implicit surfaces. We also sucessfully render non-manifold features of implicit surfaces such as rays and thin sections. We illustrate the technique with a number of example surfaces.

Real-Time Antialiasing of Edges and Contours of Point Rendered Implicit Surfaces

“…The point based methods used in previous work [8], [2], [14], and [15], where not antialiased, as it was not clear how to proceed with antialiasing point rendered scenes. We can't use n rooks or multi-jittered approaches, Chui et al [19], as these require the re-rendering of the entire scene with slightly different projection matrices.…”

“…Harbinson et al [15] reduced the rendering artifacts by using gradient and point sampling information in the plotting node to trim the interval voxels found at the plotting depth. This results in fewer points being rendered around non-manifold features.…”