Generating Shaded Ooset Surfaces with Distance, Closest-point and Color Volumes
نویسندگان
چکیده
This paper presents a technique for color-shading ooset surfaces of CSG models. The ooset surfaces are generated by rst scan converting the CSG model into a distance volume. A distance volume is a volume dataset where the value stored at each voxel is the shortest distance to the surface of the object being represented by the volume. Extracting iso-surfaces from the distance volume at various ooset values produces the ooset surfaces. The CSG model scan conversion process also produces closest-point and color volumes. The closest-point volume contains at each voxel the closest point on the scan converted CSG model from that voxel location. The color volume contains at each voxel the associated color on the CSG model at the closest point. During rendering of the oo-set surface, the color volume values are used to shade regions of constant color, and the closest point values are used to supersample the surface colors of the CSG model in order to anti-alias regions of changing color.
منابع مشابه
مدلسازی صفحهای محیطهای داخلی با استفاده از تصاویر RGB-D
In robotic applications and especially 3D map generation of indoor environments, analyzing RGB-D images have become a key problem. The mapping problem is one of the most important problems in creating autonomous mobile robots. Autonomous mobile robots are used in mine excavation, rescue missions in collapsed buildings and even planets’ exploration. Furthermore, indoor mapping is beneficial in f...
متن کاملParametric Curves , Surfaces and Volumes in Computer Graphics and Computer - Aided Geometric Design
This document has four purposes. it is a tutorial in parametric curve and surface representations, it describes a number of algorithms for generating both shaded and line-drawn pictures of bivariate surfaces and trivariate volumes, it explicitly gives transformations between all of the widely used curve and surface representations, and it proposes a solution to the problem of displaying the res...
متن کاملDirect Contouring of Implicit Closest Point Surfaces
Constructing a (signed) distance field and contouring its zero level set are two important steps in many surface reconstruction methods. While most high-quality distance transforms compute the distance to the surface as well as the closest point on it, the contouring step typically uses only the distance and omits the closest point information. Our novel closest point contouring algorithm (CPC)...
متن کاملProximity Queries with Swept Sphere Volumes
We present novel algorithms for fast proximity queries using swept sphere volumes. The set of proximity queries includes collision detection and both exact and approximate separation distance computation. We introduce a new family of bounding volumes that correspond to a core primitive shape grown outward by some ooset. The set of core primitive shapes includes a point, line, and rectangle. Thi...
متن کامل