Nicolas Douillet

PhD, INRIA and CNRS alumni

Last seen: 3 Tage vor | Aktiv seit 2017

Followers: 0 Following: 0

Interested in computational geometry, image processing, 3D reconstruction, geometry, mesh processing, mesh generation, number theory, fractals.

Programming Languages:
MATLAB
Spoken Languages:
English, French

Statistiken

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Gesendet

Geoid
Function to compute, display, and save a icosahedron based geoid at any iteration (vertices + triangles)

9 Tage vor | 3 Downloads |

Gesendet

Platonic solids
Function to compute, display, and save the five platonic solids. Also mesh them with triangles or other polygons (square, pentag...

10 Tage vor | 9 Downloads |

Gesendet

Simplex convergence animation
Simplex algorithm convergence animation demo on Matlab 'peaks' test surface

14 Tage vor | 5 Downloads |

Gesendet

PI3MFT
Printable Iterative 3D Meshed Fractal Toolbox

3 Monate vor | 5 Downloads |

Gesendet

Any rotation (3D, 2D)
Function to rotate a -array of- vector(s) around any given -shifted- axis, in 2D or 3D space.

3 Monate vor | 3 Downloads |

Gesendet

Circular meshes
Sphere and torus circular meshes

3 Monate vor | 2 Downloads |

Gelöst

Construct an index vector from two input vectors in vectorized fashion
Create an index vector defined by two input vectors, one defining the beginnings of one or more index ranges, and the other defi...

4 Monate vor

Gelöst

Fill a zeros matrix
The aim is to fill an array of all zeros given a numerical value and the index of row and columns for this value. 3 Inputs: ...

4 Monate vor

Gelöst

"Low : High - Low : High - Turn around " -- Create a subindices vector
Let two vectors *lo* and *hi* be given. The job is to create a index vector like so idx = [lo(1):hi(1) lo(2):hi(2) ...]...

4 Monate vor

Gelöst

Matrix indexing with two vectors of indices
Given a matrix M and two index vectors a and b, return a row vector x where x(i) = M(a(i),b(i)).

4 Monate vor

Gelöst

Sum My Indices
Given inputs M and N (in that order), output an MxN matrix whose entries are equal to the sum of their indices. Example input...

4 Monate vor

Gelöst

Getting the indices from a matrix
Inspired by Problem 645. Getting the indices from a matrix. Given a matrix A (or a vector), return the indices (always in row...

4 Monate vor

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First non-zero element in each column
For a given matrix, calculate the index of the first non-zero element in each column. Assuming a column with all elements zero i...

4 Monate vor

Gelöst

Replicate elements in vectors
Replicate each element of a row vector (with NaN) a constant number of times. Examples n=2, A=[1 2 3] -> [1 1 2 2 3 3] ...

4 Monate vor

Gelöst

Set the array elements whose value is 13 to 0
Input A either an array or a vector (which can be empty) Output B will be the same size as A . All elements of A equal to 13...

4 Monate vor

Gelöst

Getting logical indexes
This is a basic MATLAB operation. It is for instructional purposes. --- Logical indexing works like this. thresh = 4...

4 Monate vor

Gesendet

Isprime optimus [FAST]
Primality test using isprime Matlab(r) stock function, but ~60% faster. Based on Nicolas Douillet 'Christmas eve prime squares e...

4 Monate vor | 7 Downloads |

Gesendet

alGolbach
Algorithm to compute and list every Goldbach couples of prime numbers which sum equals the given -even- input

4 Monate vor | 1 Download |

Gesendet

Prime numbers spirals
Functions to display prime numbers spiral and prime squares spiral. Also check primes sum and prime squares spiral length.

4 Monate vor | 4 Downloads |

Beantwortet
Quickest way for alternate indexing a vector
Thank you all for your interest and answers :-) I am going to test them, pick the best in my case, and then choose for the co...

4 Monate vor | 0

Frage

Quickest way for alternate indexing a vector
Hey, I am looking for the quickest way to create a vector like this : u = [5 7 11 13 17 19 23 25 ...

4 Monate vor | 5 Antworten | 0

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Antworten

Gesendet

Mesh generation toolbox
Some useful tools for mesh generation

7 Monate vor | 9 Downloads |

Gesendet

mesh processing toolbox
Some useful tools for mesh processing

7 Monate vor | 19 Downloads |

Gesendet

Sample triangle (2D, 3D, ND)
Function to generate a triangular sampling grid of a given triangle

8 Monate vor | 1 Download |

Gesendet

Projective geometry demo
A "pedagogic" demo of projective geometry showing some mathematical objects projections

8 Monate vor | 2 Downloads |

Gesendet

Mesh ovoid
Function to compute, display, and save a meshed ovoid

8 Monate vor | 2 Downloads |

Beantwortet
Apparent distance conservation in Matlab plot window while rotating 3D objects
Ok I realized I have to be even clearer. I am going to eplore the camera toolbar possibilities -which I didn't really know unti...

8 Monate vor | 0

Gesendet

Apollonian gaskets
Function to compute and display the apollonian gasket of any 3D triangle or 3D regular polygon

8 Monate vor | 3 Downloads |