Search Results for "b spline"
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Showing 22 open source projects for "b spline"
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BasicBSpline.jl
Basic (mathematical) operations for B-spline functions
Basic (mathematical) operations for B-spline functions and related things with Julia. -
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Hex
Hydrogen-Electron Collisions
A computer code for simulation of electron-hydrogen scattering. Contains three (more or less) finished sub-programs: (a) “hex-ecs” which solves the Schrödinger equation in the B-spline basis, (b) “hex-dwba” which computes scattering variables for high energies using the distorted wave Born approximation of the first order and finally (c) “hex-db” which is a user interface to a plain SQLite database, where the intermediate results are being stored, and which is used to extract derived quantities like a cross section from it. ... -
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igspread
converts between IGES file and text file
Command-line interface program that converts between IGES file and text file. IGES files are compatible with most of CAD systems. This program permits you to convert curves and points created in CAD program into coordinates in text file or you can do the opposite - convert text files into curves. It is especially suitable for curves described by hundreds of coordinates, e.g. airfoil contours of aircraft wings. Output filename is either out.txt or out.igs. -
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asBezpch
Source code for efficiently rendering parametrically defined surfaces
Source code and generated images from my 1987 master's degree project: An Adaptive Subdivision Algorithm for the Display of Parametrically Defined Surfaces -
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IGA PEH
Isogeometric Analysis (IGA) of Piezoelectric Energy Harvesters (PEH)
...The work includes cantilever bimorph configurations of PEH with constant and quadratic varying thickness of the substructure. The non-constant substructure thickness is defined from three control points and a B-Spline of degree 2. References: VP Nguyen, C Anitescu, S Bordas, T Rabczuk. "Isogeometric analysis: an overview and computer implementation aspects". Mathematics and Computers in Simulation, (2015), pp. 89-116, Vol 117. IGAFEM from https://sourceforge.net/projects/cmcodes/ -
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gsasnp2
PubMed ID: 29562348 / DOI: 10.1093/nar/gky175
* GSA-SNP2 is a successor of GSA-SNP (Nam et al. 2010, NAR web server issue). GSA-SNP2 accepts human GWAS summary data (rs numbers, p-values) or gene-wise p-values and outputs pathway genesets ‘enriched’ with genes associated with the given phenotype. It also provides both local and global protein interaction networks in the associated pathways. * Article: SYoon, HCTNguyen, YJYoo, JKim, BBaik, SKim, JKim, SKim, DNam, "Efficient pathway enrichment and network analysis of GWAS summary data... -
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einspline is a C library for the creation and evaluation of interpolating cubic basis splines (B-splines) in 1D, 2D, and 3D. It supports both uniform and nonuniform meshes, single and double precision, and real and complex data.
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Matrix factorization is applied to the B-spline basis to construct an orthonormal basis. Data can be approximated by a linear combination of the orthonormal basis functions. Constraints are imposed such that the fitted function is linear at the boundary points, as in natural cubic spline.
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...The LAMMPS scripts return the molecular mechanics solution for some armchair and zigzag SWCNTs, while the Matlab scripts compute the numerical solution of a one-dimensional integro-differential tensile rod by B-spline finite elements. By using the proper set of nonlocal parameters, it is possible to correctly capture size and chirality effects observed in the axial strain profile computed with molecular mechanics. Reference M. Malagù, E. Benvenuti and A. Simone. “One-dimensional nonlocal elasticity for tensile single-walled carbon nanotubes: A molecular structural mechanics characterization“. ...
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splinelibrary
Building, calibrating, and evaluating different splines.
SplineLibrary implements the functionality behind spline design, spline constructions, customization, calibration, and evaluation of a wide variety of spline types and basis functions. - Spline Calibration Framework - Shape Preserving Spline Suite - Space Spline Curves - B Splines - Regression Splines - Tension Splines - Smoothing Splines - Interpolating Splines (Akima, Bessel, Hagan-West, Harmonic, Huynh-Le Floch, Hyman83, Hyman89, Kruger, Preuss, Van Leer Limiter) - Curvature/Length Penalizing Best Fit Splines - Spline Calibration - Spline Evaluation - Spline Extensions -
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Nonlocal and Gradient Elasticity
Assessment of high order one-dimensional approximation schemes
These Matlab scripts illustrate the numerical solution of two one-dimensional tensile rods equipped with integro-differential and strain-gradient constitutive laws by means of classical Hermitian and Lagrangian finite element discretizations, B-spline finite element discretizations and C∞ generalized finite element discretizations. Reference M. Malagù, E. Benvenuti, C. A. Duarte, and A. Simone. One-dimensional nonlocal and gradient elasticity: Assessment of high order approximation schemes. Computer Methods in Applied Mechanics and Engineering, accepted for publication, 22 February, 2014 (www.sciencedirect.com/science/article/pii/S0045782514000723) -
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...Capable of reading a Scene Description File and rendering that scene. Yet in early stages of development (without further optimizations). Can generate animations using Uniform B-Spline Curve segments. Now available for iOS!
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Python implementation of LaGrange, Bezier, and B-spline curves. The algorithms use their respective interpolation/basis functions, so are capable of producing curves of any order. The B-splines use Cox-De Boor and support knot insertion. 2-d only.
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This project is about the implementation of algorithms studied during mathematics and computer graphic courses for my MS's last year ( Point cloud approximation, Hermitian interpolation, Bezier / B-Spline Curves, Convex Hull, Delaunay triangulation
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This is a hybrid Matlab-Mathematica package for the numerical/pointwise and symbolic/explicit (as a piecewise polynomial) calculation of the B-Spline supported on a given 2D domain.
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A Java implementation of a cubic B-spline curve smoothing function. Allows an arbitary number of points with a variable number of dimensions to have a cubic B-spline curve "fitted". Useful in finance for analysing bond or swap yield and discount curves.
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JBSSE stands for "Java 3D Cubic B-Spline Surface Editor." The goal of this project is to provide a control mesh editor for cubic B-spline surfaces, allowing the user to view and export the generated surface in various formats (3DS, Java3D native, POV)
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Implementation of various mathematical curves that define themselves over a set of control points. The API is written in Java. The curves supported are: Bezier, B-Spline, Cardinal Spline, Catmull-Rom Spline, Lagrange, Natural Cubic Spline, and NURBS.
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PyNurbs
curves, surfaces, Bézier. B-Spline, NURBS
Python library for parametric curves and surfaces, expecially Bézier curves, B-Splines and NURBS. Developed for the my first degree thesis.
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