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refactor

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Justin Lin
2022-03-12 22:08:36 +08:00
parent 57914a8245
commit 2f7aea6147
1 changed files with 11 additions and 19 deletions
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30
src/triangle/_impl/_tri_ear_clipping_impl.scad
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@@ -16,29 +16,22 @@ function _triangulate_snipable(shape_pts, u, v, w, n, indices, epsilon = 0.0001)
c = shape_pts[indices[w]],
determinant = cross([b.x - a.x, b.y - a.y], [c.x - a.x, c.y - a.y])
)
epsilon > determinant ?
false : _triangulate_snipable_sub(shape_pts, n, u, v, w, a, b, c, indices);
epsilon <= determinant && _triangulate_snipable_sub(shape_pts, n, u, v, w, a, b, c, indices);
function _triangulate_snipable_sub(shape_pts, n, u, v, w, a, b, c, indices, p = 0) =
p == n ? true : (
((p == u) || (p == v) || (p == w)) ? _triangulate_snipable_sub(shape_pts, n, u, v, w, a, b, c, indices, p + 1) : (
_triangulate_in_triangle(a, b, c, shape_pts[indices[p]]) ?
false : _triangulate_snipable_sub(shape_pts, n, u, v, w, a, b, c, indices, p + 1)
)
p == n || (
([p, p, p] == [u, v, w] && _triangulate_snipable_sub(shape_pts, n, u, v, w, a, b, c, indices, p + 1)) ||
(_triangulate_snipable_sub(shape_pts, n, u, v, w, a, b, c, indices, p + 1) && !_triangulate_in_triangle(a, b, c, shape_pts[indices[p]]))
);
// remove the elem at idx v from indices
function _triangulate_remove_v(indices, v, num_of_vertices) =
let(nv_minuns_one = num_of_vertices - 1)
v == 0 ? [for(i = 1; i <= nv_minuns_one; i = i + 1) indices[i]] : (
v == nv_minuns_one ? [for(i = 0; i < v; i = i + 1) indices[i]] : concat(
[for(i = 0; i < v; i = i + 1) indices[i]],
[for(i = v + 1; i <= nv_minuns_one; i = i + 1) indices[i]]
)
);
v == 0 ? [for(i = 1; i <= nv_minuns_one; i = i + 1) indices[i]] :
v == nv_minuns_one ? [for(i = 0; i < v; i = i + 1) indices[i]] :
[for(i = 0; i <= nv_minuns_one; i = i + 1) if(i != v) indices[i]];
function _triangulate_zero_or_value(num_of_vertices, value) =
num_of_vertices <= value ? 0 : value;
function _triangulate_zero_or_value(num_of_vertices, value) = num_of_vertices <= value ? 0 : value;
function _triangulate_real_triangulate_sub(shape_pts, collector, indices, v, num_of_vertices, count, epsilon) =
let(
@@ -69,10 +62,9 @@ function _triangulate_snip(shape_pts, collector, indices, u, v, w, num_of_vertic
);
function _triangulate_real_triangulate(shape_pts, collector, indices, v, num_of_vertices, count, epsilon) =
count <= 0 ? [] : (
num_of_vertices == 2 ?
collector : _triangulate_real_triangulate_sub(shape_pts, collector, indices, v, num_of_vertices, count - 1, epsilon)
);
count <= 0 ? [] :
num_of_vertices == 2 ? collector :
_triangulate_real_triangulate_sub(shape_pts, collector, indices, v, num_of_vertices, count - 1, epsilon);
function _tri_ear_clipping_impl(shape_pts, epsilon) =
let(