# near

## near fac fac

### near fac fac(f)vol(id)

Returns the number of adjacent facets of the facet f volume id.

### near fac vertex(s)vol(id)

Returns the number of facets of the volume id containing the vertex s.

## near frac

### near frac vol(id)

Returns the triplets {(nij,ni,nj)}
nf,nb,0: nf=number of the vertex of the fractal, nb = number of the vertex of the base.
nij,ni,nj: nij=number of the vertex of fractal, which is middle of the fractal vertices ni and nj.

## near image

### near image(id)

Cellular automaton on the image id with matrix:
1 1 1
1 0 1
1 0 1

Options:
alea(p): reproductible random of probability a (0: never, 1: always).
dup: the algorithm works on a copy of the image (default).
matrix(m00,m01,m02, m10,m11,m12, m20,m21,m22) default is 1,1,1, 1,0,1, 1,1,1).
number(n1,n2) (2, 3 default):
a cell with n2 active neighbours becomes active
a cell with less than n1 or more than n2 active neighbours becomes inactive
rand(p): not reproductible random of probability a (0: never, 1: always).

### near image(id)=n

the process near image(id) will be applied during n displays of the image id.

## near line

### near line(L0)line(L1)

Returns the nearest vector of line L1 from vector L0.
Options:
max: the farest.
Exemples:
`\$near line(1,2,3)line(1.1,2.2,3.3, 2,4,6);`
returs 1.1,2.2,3.3
`\$near line(1,2,3)line(1.1,2.2,3.3, 2,4,6)max;`
returs 2,4,6

## dist pixel

### near pixel(x,y)image(id)coe(note)luminance(lum1,lum2)

Returns the pixel (x',y') of image id such as (x',y')=(x,y)+note((x0,y0)-(x,y)), where (x0,y0) is the pixel whose luminance belongs to [lum1,lum2] nearest from pixe (x,y).
By default:
note=1: the pixel returned is (x0,y0)
lum1=lum2=1 defining the set of white pixels in image id.

## near vertex vertex

### near vertex vertex(s)vol(id)

Returns numbers of the vertices of volume id which are adjacent to vertex s.