# alphashape3d v1.3

Monthly downloads

## Implementation of the 3D Alpha-Shape for the Reconstruction of 3D Sets from a Point Cloud

Implementation in R of the alpha-shape of a finite set of points in the three-dimensional space. The alpha-shape generalizes the convex hull and allows to recover the shape of non-convex and even non-connected sets in 3D, given a random sample of points taken into it. Besides the computation of the alpha-shape, this package provides users with functions to compute the volume of the alpha-shape, identify the connected components and facilitate the three-dimensional graphical visualization of the estimated set.

## Readme

# alphashape3d

The package **alphashape3d** presents the implementation in R of the **alpha-shape** of a finite set of points in the **three-dimensional** space. This geometric structure generalizes the convex hull and allows to recover the shape of non-convex and even non-connected sets in 3D, given a random sample of points taken into it. Besides the computation of the alpha-shape, the package **alphashape3d** provides users with functions to compute the volume of the alpha-shape, identify the connected components and facilitate the three-dimensional graphical visualization of the estimated set.

To install:

- the latest released version from CRAN:
`install.packages("alphashape3d")`

- the latest development version without vignette:
`install_github("alphashape3d","tlafarge",build_vignettes = FALSE)`

(require "devtools") - the latest development version:
`install_github("alphashape3d","tlafarge")`

(require "devtools")

Authors:

- Beatriz Pateiro-Lopez beatriz.pateiro@usc.es
- Thomas Lafarge thomas.lafarge@nist.gov

License:

- GPL-2

## Functions in alphashape3d

Name | Description | |

plot.ashape3d | Plot the \(\alpha\)-shape in 3D | |

rtorus | Generate points in the torus | |

components_ashape3d | Connected subsets computation | |

inashape3d | Test of the inside of an \(\alpha\)-shape | |

alphashape3d-package | Computation of the 3D \(\alpha\)-shape | |

ashape3d | 3D \(\alpha\)-shape computation | |

surfaceNormals | Normal vectors computation | |

volume_ashape3d | Volume computation | |

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## Last month downloads

## Details

Date | 2017-12-14 |

License | GPL-2 |

LazyLoad | yes |

NeedsCompilation | yes |

RoxygenNote | 6.0.1 |

Packaged | 2017-12-21 12:37:08 UTC; beatriz |

X-CRAN-Comment | Archived on 2017-12-04 as errors in remaking vignette were not corrected despite reminders. |

Repository | CRAN |

Date/Publication | 2017-12-21 15:04:35 UTC |

suggests | alphahull |

depends | geometry , rgl |

Contributors | Thomas Lafarge, Beatriz Pateiro-Lopez |

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