PetscDTIndexToBary#
convert an index into a barycentric coordinate.
Synopsis#
#include "petscdt.h" 
PetscErrorCode PetscDTIndexToBary(PetscInt len, PetscInt sum, PetscInt index, PetscInt coord[])
Input Parameters#
- len - the desired length of the barycentric tuple (usually 1 more than the dimension it represents, so a barycentric coordinate in a triangle has length 3) 
- sum - the value that the sum of the barycentric coordinates (which will be non-negative integers) should sum to 
- index - the index to convert: should be >= 0 and < Binomial(len - 1 + sum, sum) 
Output Parameter#
- coord - will be filled with the barycentric coordinate, of length - n
Note#
The indices map to barycentric coordinates in lexicographic order, where the first index is the least significant and the last index is the most significant.
See Also#
Level#
beginner
Location#
Index of all DT routines
Table of Contents for all manual pages
Index of all manual pages