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add triangle_splice

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Justin Lin
2019-10-07 20:41:55 +08:00
parent 7db613cef2
commit 385258bbc9
1 changed files with 49 additions and 0 deletions
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examples/triangle_splice.scad Normal file
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include <line2d.scad>;
include <polyline2d.scad>;
tri_side_leng = 20;
tris_per_line = 10;
lines = 3;
line_width = 1;
points = [[10, -6], [-6.5, -6], [-3, 0], [0, 0]];
// points = [[0, 0], [1.5, 2.5], [1.5, -6], [-4, -6], [-6.5, 0]];
triangle_splice(tri_side_leng, tris_per_line, lines, line_width)
triangle_pattern(points, line_width);
module triangle_pattern(points, line_width) {
polyline2d(points, line_width);
rotate([0, 0, 120]) polyline2d(points, line_width);
rotate([0, 0, 240]) polyline2d(points, line_width);
}
module triangle_splice_one_line(tri_leng, tris, line_width) {
half_leng = tri_leng / 2;
height = half_leng * sqrt(3);
hd3 = height / 3;
for(i = [0 : tris - 1]) {
x_offset = half_leng * i;
is_even = i % 2 == 0;
translate([x_offset, is_even ? 0 : hd3, 0])
mirror([0, is_even ? 0 : 1, 0])
children();
}
}
module triangle_splice(length, tris_per_line, lines, line_width = 1) {
half_leng = length / 2;
height = half_leng * sqrt(3);
hd3 = height / 3;
for(i = [0 : lines - 1]) {
is_even = i % 2 == 0;
hoffset = height * i;
translate([0, is_even ? hoffset : hoffset + hd3])
mirror([0, is_even ? 0 : 1, 0])
triangle_splice_one_line(length, tris_per_line, line_width)
children();
}
}