Decision criteria for computer-aided parting surface design
Computer-Aided Design
Computational geometry in C
The art of computer programming, volume 1 (3rd ed.): fundamental algorithms
The art of computer programming, volume 1 (3rd ed.): fundamental algorithms
Computational Geometry: Theory and Applications
Directed edges—A scalable representation for triangle meshes
Journal of Graphics Tools
Proceedings of the 27th annual conference on Computer graphics and interactive techniques
Computing a canonical polygonal schema of an orientable triangulated surface
SCG '01 Proceedings of the seventeenth annual symposium on Computational geometry
Finding feasible mold parting directions using graphics hardware
Computer-Aided Design
Finding all undercut-free parting directions for extrusions
GMP'06 Proceedings of the 4th international conference on Geometric Modeling and Processing
Finding mold-piece regions using computer graphics hardware
GMP'06 Proceedings of the 4th international conference on Geometric Modeling and Processing
Efficient computation of a near-optimal primary parting line
2009 SIAM/ACM Joint Conference on Geometric and Physical Modeling
Simultaneous optimization of cast part and parting direction using level set method
Structural and Multidisciplinary Optimization
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This paper considers the mold design problem of computing a parting line for a complex mesh model, given a parting direction. Existing parting line algorithms are unsuitable for this case, as local variations in the orientations of the facets of such models lead to a parting line which zig-zags across the surface in an undesirable way. This paper presents a method to compute a smooth parting line which runs through a triangle band composed of triangles whose normals are approximately perpendicular to the parting direction. The skeleton of the triangle band is used to generate a structure representing distinct topological cycles, and to decompose the triangle band into singly-connected surface pieces, giving candidate paths. We choose a set of paths giving a good cycle; the final smooth parting line is then constructed by iteratively improving the quality of this cycle. Compliance in the physical material, or minor modifications to the surface itself, will ensure that such a parting line is appropriate for use.