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add min_area to vnf_vertex_array

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Adrian Mariano 2023-02-03 17:17:24 -05:00
parent be998746e6
commit b81c3638d5
1 changed files with 10 additions and 1 deletions
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11
vnf.scad
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@ -131,7 +131,7 @@ function vnf_vertex_array(
) =
assert(!(any([caps,cap1,cap2]) && !col_wrap), "col_wrap must be true if caps are requested")
assert(!(any([caps,cap1,cap2]) && row_wrap), "Cannot combine caps with row_wrap")
assert(in_list(style,["default","alt","quincunx", "convex","concave", "min_edge"]))
assert(in_list(style,["default","alt","quincunx", "convex","concave", "min_edge","min_area"]))
assert(is_matrix(points[0], n=3),"Point array has the wrong shape or points are not 3d")
assert(is_consistent(points), "Non-rectangular or invalid point array")
let(
@ -174,6 +174,15 @@ function vnf_vertex_array(
[[i1,i5,i2],[i2,i5,i3],[i3,i5,i4],[i4,i5,i1]]
: style=="alt"?
[[i1,i4,i2],[i2,i4,i3]]
: style=="min_area"?
let(
area42 = norm(cross(pts[i2]-pts[i1], pts[14]-pts[i1]))+norm(cross(pts[i4]-pts[i3], pts[i2]-pts[i3])),
area13 = norm(cross(pts[i1]-pts[i4], pts[i3]-pts[i4]))+norm(cross(pts[i3]-pts[i2], pts[i1]-pts[i2])),
minarea_edge = area42 < area13 + EPSILON
? [[i1,i4,i2],[i2,i4,i3]]
: [[i1,i3,i2],[i1,i4,i3]]
)
minarea_edge
: style=="min_edge"?
let(
d42=norm(pts[i4]-pts[i2]),