Archives for posts with tag: pointClouds

rmanPtc SOP

February 9, 10 //

The RmanPtcSop project is a Houdini geometry operator (SOP) for loading and displaying RenderMan point clouds. It is based on the open source dnPtcViewerNode project from Double Negative Visual Effects.

Features of the rmanPtc SOP include:

  • Independent control for limiting the number of points loaded and displayed.
  • Geometry output for all point attributes in the cloud.
  • OpenGL display preview for attributes as point or disk primitives.
  • Ability to cull points based on a reference bounding box.

Home Page: http://danbethell.github.com/rmanptcsop/
Language: C++
Platform: Linux, Windows, OS X
License: New BSD License

ANN

January 6, 10 //

ANN – Approximate Nearest Neighbor Searching – is a library written in C++, which supports data structures and algorithms for both exact and approximate nearest neighbor searching in arbitrarily high dimensions.

In the nearest neighbor problem a set of data points in d-dimensional space is given. These points are preprocessed into a data structure, so that given any query point q, the nearest or generally k nearest points of P to q can be reported efficiently. The distance between two points can be defined in many ways. ANN assumes that distances are measured using any class of distance functions called Minkowski metrics. These include the well known Euclidean distance, Manhattan distance, and max distance. (more…)

Project Page: http://www.cs.umd.edu/~mount/ANN/
Language: C++
Platform: Linux, Windows, OS X
License: LGPL

CGAL (Computational Geometry Algorithms Library)

January 5, 10 //

The Computational Geometry Algorithms Library (CGAL) offers data structures and algorithms like triangulations (2D constrained triangulations and Delaunay triangulations in 2D and 3D, periodic triangulations in 3D), Voronoi diagrams (for 2D and 3D points, 2D additively weighted Voronoi diagrams, and segment Voronoi diagrams), polygons (Boolean operations, offsets, straight skeleton), polyhedra (Boolean operations), arrangements of curves and their applications (2D and 3D envelopes, Minkowski sums), mesh generation (2D Delaunay mesh generation and 3D surface and volume mesh generation, skin surfaces), geometry processing (surface mesh simplification, subdivision and parameterization, as well as estimation of local differential properties, and approximation of ridges and umbilics), alpha shapes, convex hull algorithms (in 2D, 3D and dD), search structures (kd trees for nearest neighbor search, and range and segment trees), interpolation (natural neighbor interpolation and placement of streamlines), shape analysis, fitting, and distances (smallest enclosing sphere of points or spheres, smallest enclosing ellipsoid of points, principal component analysis), and kinetic data structures.

Home Page: http://www.cgal.org/
Project Page: http://www.cgal.org/
Language: C++
Platform: Linux, Mac OS X, Windows
License: LGPL or QPL (if used for open source projects, or proprietary projects that are internal to the studio), or a commercial license (if distributed in a commercial product).

CgKit

January 3, 10 //

The Python Computer Graphics Kit is an Open Source software package containing a collection of Python modules, plugins and utilities that are meant to be useful for any domain where you have to deal with 3D data of any kind, be it for visualization, creating photorealistic images, Virtual Reality or even games. (more…)

Home Page: http://cgkit.sourceforge.net/
Project Page: http://sourceforge.net/projects/cgkit/
Language: C++, Python
Platform: Linux, Windows, OS X
License: GPL, LGPL, MPL1.1

dnPtcViewerNode

January 1, 10 //

An Autodesk Maya locator to visualize point clouds generated by Pixar’s PhotoRealistic RenderMan or 3Delight. This plugin was developed by Double Negative Visual Effects.

Home Page: http://dneg.github.com/dnPtcViewerNode/
Project Page: http://github.com/dneg/dnPtcViewerNode
Language: C++, MEL
Platform: Linux OSX Windows
License: BSD v3
Sponsor: Double Negative