Patch Curvature 1.0

Date Added: May 28, 2013 | Visits: 250

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This function calculates the principal curvature directions and values of a triangulated mesh. The function first rotates the data so the normal of the current vertex becomes [-1 0 0], so we can describe the data by XY instead of XYZ. Secondly it fits a least-squares quadratic patch to the local neighborhood of a vertex "f(x,y) = ax^2 + by^2 + cxy + dx + ey + f". Then the eigenvectors and eigenvalues of the hessian are used to calculate the principal, mean and gaussian curvature. [Cmean,Cgaussian,Dir1,Dir2,Lambda1,Lambda2]=patchcurvature(FV,usethird) inputs, FV : A triangulated mesh (see Patch) usethird : Use third order neighbour vertices for the curvature fit, making it smoother but less local. true/ false (default) outputs, Cmean : Mean Curvature Cgaussian : Gaussian Curvature Dir1 : XYZ Direction of first Principal component Dir2 : XYZ Direction of second Principal component Lambda1 : value of first Principal component Lambda2 : value of second Principal component

Requirements: No special requirements

Platforms: Matlab

Keyword: False, Gaussian, Inputs, Making, Neighbour, Order, Patch, Smoother, Vertices

Users rating: 0/10

License: Shareware

Size: 296.96 KB

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