The surface remesh functionality in Polygonica can be used to substantially improve mesh quality, particularly those containing many long and thin triangles, typically of tessellations provided by CAD design systems. Polygonica's remeshing aims to obtain near to equilateral triangles, whilst maintaining the overall shape and features of the original model. Improved mesh quality improves the robustness of downstream operations as well as facilitating local modelling operations such as deformation.
A wide range of options are available, including curvature-sensitive remeshing and adjustment of remeshed vertices to lie on the original CAD surface patch.
Simplification/Decimation reduces the polygon count of a model whilst maintaining the shape to within a specified distance tolerance. Optionally, the decimated model can lie entirely outside the original, which is useful when creating lightweight proxies for collision detection. Simplification can also be used in out-of-core scenarios, where a large model is progressively decimated on disk until it is small enough to be loaded into available RAM.
Shrink-wrapping removes internal detail and can produce a close-fitting watertight envelope around arbitrary geometry including sparse point datasets. Other uses include generating proxy level of detail meshes for use in VR/AR and accelerating clash detection by providing a tighter envelope than is possible with convex hulls.
Remesh and decimation can operate on selected regions of the model, allowing improvements to be made in critical areas, such as turbine-blade edges, without affecting the rest of the model.
Both operations can also respect a range of surface boundaries conditions, such as colour, texture coordinates, CAD surface patches or user defined regions, allowing a full remesh without modifying critical boundaries within the part.
