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Code Issues Releases Wiki Activity

provide an option to switch the metohd of extrude

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Justin Lin
2019-05-31 09:39:41 +08:00
parent afd460579e
commit 8f40ae8b30
1 changed files with 184 additions and 123 deletions
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79
src/path_extrude.scad
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@@ -16,8 +16,17 @@ include <__private__/__angy_angz.scad>;
// For backward compatibility, I directly include m_rotation here.
include <m_rotation.scad>;
module path_extrude(shape_pts, path_pts, triangles = "SOLID", twist = 0, scale = 1.0, closed = false) {
// pre-process parameters
module path_extrude(shape_pts, path_pts, triangles = "SOLID", twist = 0, scale = 1.0, closed = false, method = "AXIS_ANGLE") {
sh_pts = len(shape_pts[0]) == 3 ? shape_pts : [for(p = shape_pts) __to3d(p)];
pth_pts = len(path_pts[0]) == 3 ? path_pts : [for(p = path_pts) __to3d(p)];
len_path_pts = len(pth_pts);
len_path_pts_minus_one = len_path_pts - 1;
module axis_angle_path_extrude() {
twist_step_a = twist / len_path_pts;
function scale_pts(pts, s) = [
for(p = pts) [p[0] * s[0], p[1] * s[1], p[2] * s[2]]
];
@@ -28,13 +37,6 @@ module path_extrude(shape_pts, path_pts, triangles = "SOLID", twist = 0, scale =
function rotate_pts(pts, a, v) = [for(p = pts) rotate_p(p, a, v)];
sh_pts = len(shape_pts[0]) == 3 ? shape_pts : [for(p = shape_pts) __to3d(p)];
pth_pts = len(path_pts[0]) == 3 ? path_pts : [for(p = path_pts) __to3d(p)];
len_path_pts = len(pth_pts);
len_path_pts_minus_one = len_path_pts - 1;
twist_step_a = twist / len_path_pts;
function scale_step() =
let(s = (scale - 1) / len_path_pts_minus_one)
[s, s, s];
@@ -163,6 +165,65 @@ module path_extrude(shape_pts, path_pts, triangles = "SOLID", twist = 0, scale =
test_path_extrude(sects);
}
module euler_angles_path_extrude() {
scale_step_vt = __is_float(scale) ?
[(scale - 1) / len_path_pts_minus_one, (scale - 1) / len_path_pts_minus_one] :
[(scale[0] - 1) / len_path_pts_minus_one, (scale[1] - 1) / len_path_pts_minus_one];
scale_step_x = scale_step_vt[0];
scale_step_y = scale_step_vt[1];
twist_step = twist / len_path_pts_minus_one;
function section(p1, p2, i) =
let(
length = norm(p1 - p2),
angy_angz = __angy_angz(p1, p2),
ay = -angy_angz[0],
az = angy_angz[1]
)
[
for(p = sh_pts)
let(scaled_p = [p[0] * (1 + scale_step_x * i), p[1] * (1 + scale_step_y * i), p[2]])
rotate_p(
rotate_p(
rotate_p(scaled_p, twist_step * i), [90, 0, -90]
) + [i == 0 ? 0 : length, 0, 0],
[0, ay, az]
) + p1
];
function path_extrude_inner(index) =
index == len_path_pts ? [] :
concat(
[section(pth_pts[index - 1], pth_pts[index], index)],
path_extrude_inner(index + 1)
);
function calculated_sections() =
let(sections = path_extrude_inner(1))
closed && pth_pts[0] == pth_pts[len_path_pts_minus_one] ?
concat(sections, [sections[0]]) : // round-robin
concat([section(pth_pts[0], pth_pts[1], 0)], sections);
sections = calculated_sections();
polysections(
sections,
triangles = triangles
);
// hook for testing
test_path_extrude(sections);
}
if(method == "AXIS_ANGLE") {
axis_angle_path_extrude();
}
else if(method == "EULER_ANGLE") {
euler_angles_path_extrude();
}
}
// override to test
module test_path_extrude(sections) {