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Code Issues Releases Wiki Activity

improved hollow performance

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This commit is contained in:
Justin Lin
2017-05-10 22:10:58 +08:00
parent 36a5afbf56
commit 5141099b96
1 changed files with 75 additions and 41 deletions
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116
src/polysections.scad
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@@ -12,39 +12,92 @@
**/
module polysections(sections, triangles = "SOLID") {
function side_indexes(sects, begin_idx = 0) =
let(
leng_sects = len(sects),
leng_pts_sect = len(sects[0])
)
[
for(j = [begin_idx:leng_pts_sect:begin_idx + (leng_sects - 2) * leng_pts_sect])
for(i = [0:leng_pts_sect - 1])
[
j + i,
j + (i + 1) % leng_pts_sect,
j + (i + 1) % leng_pts_sect + leng_pts_sect ,
j + i + leng_pts_sect
]
];
module solid_sections(sects) {
leng_sects = len(sects);
leng_pts_sect = len(sects[0]);
side_idxes = [
for(j = [0:leng_pts_sect:(leng_sects - 2) * leng_pts_sect])
for(i = [0:leng_pts_sect - 1])
[
j + i,
j + (i + 1) % leng_pts_sect,
j + (i + 1) % leng_pts_sect + leng_pts_sect ,
j + i + leng_pts_sect
]
];
first_idxes = [for(i = [0:leng_pts_sect - 1]) i];
last_idxes = [
for(i = [0:leng_pts_sect - 1])
i + leng_pts_sect * (leng_sects - 1)
i + leng_pts_sect * (len(sects) - 1)
];
v_pts = [
for(section = sections)
for(pt = section)
for(sect = sects)
for(pt = sect)
pt
];
polyhedron(
v_pts,
concat([first_idxes], side_idxes, [last_idxes])
concat([first_idxes], side_indexes(sects), [last_idxes])
);
}
module hollow_sections(sects) {
leng_sects = len(sects);
leng_sect = len(sects[0]);
half_leng_sect = leng_sect / 2;
half_leng_v_pts = leng_sects * half_leng_sect;
function strip_sects(begin_idx, end_idx) =
[
for(i = [0:leng_sects - 1])
[
for(j = [begin_idx:end_idx])
sects[i][j]
]
];
function end_idxes(begin_idx) =
[
for(i = [0:half_leng_sect - 1])
[
begin_idx + i,
begin_idx + (i + 1) % half_leng_sect,
begin_idx + (i + 1) % half_leng_sect + half_leng_v_pts,
begin_idx + i + half_leng_v_pts
]
];
outer_sects = strip_sects(0, half_leng_sect - 1);
inner_sects = strip_sects(half_leng_sect, leng_sect - 1);
function to_v_pts(sects) =
[
for(sect = sects)
for(pt = sect)
pt
];
outer_v_pts = to_v_pts(outer_sects);
inner_v_pts = to_v_pts(inner_sects);
outer_idxes = side_indexes(outer_sects);
inner_idxes = side_indexes(inner_sects, half_leng_v_pts);
first_idxes = end_idxes(0);
last_idxes = end_idxes(half_leng_v_pts - half_leng_sect);
polyhedron(
concat(outer_v_pts, inner_v_pts),
concat(first_idxes, outer_idxes, inner_idxes, last_idxes)
);
}
module triangles_defined_sections() {
module tri_sections(tri1, tri2) {
@@ -58,30 +111,9 @@ module polysections(sections, triangles = "SOLID") {
]
);
}
function hollow_tris() =
let(
leng_section = len(sections[0]),
inner_i_begin = leng_section / 2,
idxes = concat(
[
for(i = [0:inner_i_begin - 1])
let(n = inner_i_begin + i + 1)
[i, inner_i_begin + i, n % inner_i_begin + inner_i_begin]
],
[
for(i = [0:inner_i_begin - 1])
let(n = inner_i_begin + i + 1)
[i, i + 1, n % leng_section]
]
)
) idxes;
function tris() =
triangles == "HOLLOW" ? hollow_tris() : triangles;
module two_sections(section1, section2) {
for(idx = tris()) {
for(idx = triangles) {
// hull is for preventing from WARNING: Object may not be a valid 2-manifold
hull() tri_sections(
[
@@ -106,10 +138,12 @@ module polysections(sections, triangles = "SOLID") {
}
}
//
if(triangles == "SOLID") {
solid_sections(sections);
} else {
} else if(triangles == "HOLLOW") {
hollow_sections(sections);
}
else {
triangles_defined_sections();
}
}