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switch order of sections in vnf

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Adrian Mariano 2021-09-16 16:56:04 -04:00
parent dbd1597a6c
commit 5d0b42b667
1 changed files with 57 additions and 57 deletions
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114
vnf.scad
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@ -21,63 +21,6 @@
EMPTY_VNF = [[],[]]; // The standard empty VNF with no vertices or faces.
// Function: is_vnf()
// Usage:
// bool = is_vnf(x);
// Description:
// Returns true if the given value looks like a VNF structure.
function is_vnf(x) =
is_list(x) &&
len(x)==2 &&
is_list(x[0]) &&
is_list(x[1]) &&
(x[0]==[] || (len(x[0])>=3 && is_vector(x[0][0]))) &&
(x[1]==[] || is_vector(x[1][0]));
// Function: is_vnf_list()
// Description: Returns true if the given value looks passingly like a list of VNF structures.
function is_vnf_list(x) = is_list(x) && all([for (v=x) is_vnf(v)]);
// Function: vnf_vertices()
// Description: Given a VNF structure, returns the list of vertex points.
function vnf_vertices(vnf) = vnf[0];
// Function: vnf_faces()
// Description: Given a VNF structure, returns the list of faces, where each face is a list of indices into the VNF vertex list.
function vnf_faces(vnf) = vnf[1];
// Function: vnf_get_vertex()
// Usage:
// vvnf = vnf_get_vertex(vnf, p);
// Description:
// Finds the index number of the given vertex point `p` in the given VNF structure `vnf`.
// If said point does not already exist in the VNF vertex list, it is added to the returned VNF.
// Returns: `[INDEX, VNF]` where INDEX is the index of the point in the returned VNF's vertex list,
// and VNF is the possibly modified new VNF structure. If `p` is given as a list of points, then
// the returned INDEX will be a list of indices.
// Arguments:
// vnf = The VNF structue to get the point index from.
// p = The point, or list of points to get the index of.
// Example:
// vnf1 = vnf_get_vertex(p=[3,5,8]); // Returns: [0, [[[3,5,8]],[]]]
// vnf2 = vnf_get_vertex(vnf1, p=[3,2,1]); // Returns: [1, [[[3,5,8],[3,2,1]],[]]]
// vnf3 = vnf_get_vertex(vnf2, p=[3,5,8]); // Returns: [0, [[[3,5,8],[3,2,1]],[]]]
// vnf4 = vnf_get_vertex(vnf3, p=[[1,3,2],[3,2,1]]); // Returns: [[1,2], [[[3,5,8],[3,2,1],[1,3,2]],[]]]
function vnf_get_vertex(vnf=EMPTY_VNF, p) =
let(
isvec = is_vector(p),
pts = isvec? [p] : p,
res = set_union(vnf[0], pts, get_indices=true)
) [
(isvec? res[0][0] : res[0]),
[ res[1], vnf[1] ]
];
// Section: Constructing VNFs
// Function: vnf_vertex_array()
@ -438,6 +381,63 @@ function vnf_merge(vnfs, cleanup=false, eps=EPSILON) =
[nverts, nfaces];
// Function: is_vnf()
// Usage:
// bool = is_vnf(x);
// Description:
// Returns true if the given value looks like a VNF structure.
function is_vnf(x) =
is_list(x) &&
len(x)==2 &&
is_list(x[0]) &&
is_list(x[1]) &&
(x[0]==[] || (len(x[0])>=3 && is_vector(x[0][0]))) &&
(x[1]==[] || is_vector(x[1][0]));
// Function: is_vnf_list()
// Description: Returns true if the given value looks passingly like a list of VNF structures.
function is_vnf_list(x) = is_list(x) && all([for (v=x) is_vnf(v)]);
// Function: vnf_vertices()
// Description: Given a VNF structure, returns the list of vertex points.
function vnf_vertices(vnf) = vnf[0];
// Function: vnf_faces()
// Description: Given a VNF structure, returns the list of faces, where each face is a list of indices into the VNF vertex list.
function vnf_faces(vnf) = vnf[1];
// Function: vnf_get_vertex()
// Usage:
// vvnf = vnf_get_vertex(vnf, p);
// Description:
// Finds the index number of the given vertex point `p` in the given VNF structure `vnf`.
// If said point does not already exist in the VNF vertex list, it is added to the returned VNF.
// Returns: `[INDEX, VNF]` where INDEX is the index of the point in the returned VNF's vertex list,
// and VNF is the possibly modified new VNF structure. If `p` is given as a list of points, then
// the returned INDEX will be a list of indices.
// Arguments:
// vnf = The VNF structue to get the point index from.
// p = The point, or list of points to get the index of.
// Example:
// vnf1 = vnf_get_vertex(p=[3,5,8]); // Returns: [0, [[[3,5,8]],[]]]
// vnf2 = vnf_get_vertex(vnf1, p=[3,2,1]); // Returns: [1, [[[3,5,8],[3,2,1]],[]]]
// vnf3 = vnf_get_vertex(vnf2, p=[3,5,8]); // Returns: [0, [[[3,5,8],[3,2,1]],[]]]
// vnf4 = vnf_get_vertex(vnf3, p=[[1,3,2],[3,2,1]]); // Returns: [[1,2], [[[3,5,8],[3,2,1],[1,3,2]],[]]]
function vnf_get_vertex(vnf=EMPTY_VNF, p) =
let(
isvec = is_vector(p),
pts = isvec? [p] : p,
res = set_union(vnf[0], pts, get_indices=true)
) [
(isvec? res[0][0] : res[0]),
[ res[1], vnf[1] ]
];
// Section: Altering the VNF Internals