Computational geometry: curve and surface modeling
Computational geometry: curve and surface modeling
SIGGRAPH '96 Proceedings of the 23rd annual conference on Computer graphics and interactive techniques
Implementation and evaluation of thin-shell rapid prototype
Computers in Industry
On surface normal and Gaussian curvature approximations given data sampled from a smooth surface
Computer Aided Geometric Design
Max-fit biarc fitting to STL models for rapid prototyping processes
Proceedings of the sixth ACM symposium on Solid modeling and applications
Surface Modeling for CAD - Cam
Surface Modeling for CAD - Cam
Max-fit biarc fitting to STL models for rapid prototyping processes
Proceedings of the sixth ACM symposium on Solid modeling and applications
Offsetting operations on non-manifold topological models
Computer-Aided Design
Triangular mesh offset for generalized cutter
Computer-Aided Design
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This paper presents a new method of using non-uniform offsetting and biarcs fitting to hollow out solid objects or thick walls to speed up the part building processes on rapid prototyping (RP) systems. Building a hollowed prototype instead of a solid part can significantly reduce the material consumption and the build time. A rapid prototyped part with constant wall thickness is important for many different applications of rapid prototyping. To provide the correct offset wall thickness, we develop a non-uniform offsetting method and an averaged surface normals method to find the correct offset contours of the stereolithography (STL) models. Detailed algorithms are presented to eliminate self-intersections, loops and irregularities of the offsetting contours. Biarcs fitting is used to generate smooth cross-section boundaries and offset contours for RP processes. Implementation results show that the developed techniques can generate smoothed slicing contours with accuracy for rapid prototyping without suffering from handling the huge number of linear segments of the traditional methods.