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added rounded_extrude
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Justin Lin
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19
README.md
19
README.md
@ -74,14 +74,9 @@ Too many dependencies? Because OpenSCAD doesn't provide namespace management, I
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- [box_extrude](https://openhome.cc/eGossip/OpenSCAD/lib-box_extrude.html)
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- [ellipse_extrude](https://openhome.cc/eGossip/OpenSCAD/lib-ellipse_extrude.html)
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- [stereographic_extrude](https://openhome.cc/eGossip/OpenSCAD/lib-stereographic_extrude.html)
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- [path_extrude](https://openhome.cc/eGossip/OpenSCAD/lib-path_extrude.html)
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- [ring_extrude](https://openhome.cc/eGossip/OpenSCAD/lib-ring_extrude.html)
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- [helix_extrude](https://openhome.cc/eGossip/OpenSCAD/lib-helix_extrude.html)
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- [golden_spiral_extrude](https://openhome.cc/eGossip/OpenSCAD/lib-golden_spiral_extrude.html)
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- [archimedean_spiral_extrude](https://openhome.cc/eGossip/OpenSCAD/lib-archimedean_spiral_extrude.html)
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- [sphere_spiral_extrude](https://openhome.cc/eGossip/OpenSCAD/lib-sphere_spiral_extrude.html)
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- [rounded_extrude](https://openhome.cc/eGossip/OpenSCAD/lib-rounded_extrude.html)
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- Shape
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- 2D Shape
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- [shape_taiwan](https://openhome.cc/eGossip/OpenSCAD/lib-shape_taiwan.html)
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- [shape_arc](https://openhome.cc/eGossip/OpenSCAD/lib-shape_arc.html)
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- [shape_pie](https://openhome.cc/eGossip/OpenSCAD/lib-shape_pie.html)
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@ -90,7 +85,15 @@ Too many dependencies? Because OpenSCAD doesn't provide namespace management, I
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- [shape_trapezium](https://openhome.cc/eGossip/OpenSCAD/lib-shape_trapezium.html)
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- [shape_pentagram](https://openhome.cc/eGossip/OpenSCAD/lib-shape_pentagram.html)
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- [shape_superformula](https://openhome.cc/eGossip/OpenSCAD/lib-shape_superformula.html)
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- 2D Shape Extrusion
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- [path_extrude](https://openhome.cc/eGossip/OpenSCAD/lib-path_extrude.html)
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- [ring_extrude](https://openhome.cc/eGossip/OpenSCAD/lib-ring_extrude.html)
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- [helix_extrude](https://openhome.cc/eGossip/OpenSCAD/lib-helix_extrude.html)
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- [golden_spiral_extrude](https://openhome.cc/eGossip/OpenSCAD/lib-golden_spiral_extrude.html)
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- [archimedean_spiral_extrude](https://openhome.cc/eGossip/OpenSCAD/lib-archimedean_spiral_extrude.html)
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- [sphere_spiral_extrude](https://openhome.cc/eGossip/OpenSCAD/lib-sphere_spiral_extrude.html)
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- Other
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- [turtle2d](https://openhome.cc/eGossip/OpenSCAD/lib-turtle2d.html)
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- [turtle3d](https://openhome.cc/eGossip/OpenSCAD/lib-turtle3d.html)
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docs/images/lib-rounded_extrude-1.JPG
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docs/lib-rounded_extrude.md
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docs/lib-rounded_extrude.md
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# rounded_extrude
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Extrudes a 2D object roundly from 0 to 180 degrees.
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## Parameters
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- `size` : The size of A retangle which can cover the 2D object. Accepts single value, square with both sides this length. It also accepts 2 value array `[x, y]`, rectangle with dimensions `x` and `y`.
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- `round_r` : The radius when extruding roundly.
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- `angle` : 0 to 180 degrees. The default value is 90 degrees.
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- `convexity`, `twist`: The same as respective parameters of `linear_extrude`.
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- `$fa`, `$fs`, `$fn` : Used to control the round fragments. Check [the circle module](https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Using_the_2D_Subsystem#circle) for more details.
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## Examples
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include <rounded_extrude.scad>;
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$fn = 48;
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circle_r = 10;
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round_r = 5;
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rounded_extrude(circle_r * 2, round_r)
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circle(circle_r);
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translate([0, 0, round_r])
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cylinder(h = 20, r1 = circle_r + round_r, r2 = 0);
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67
src/rounded_extrude.scad
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src/rounded_extrude.scad
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/**
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* rounded_extrude.scad
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*
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* Extrudes a 2D object roundly from 0 to 180 degrees.
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*
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* @copyright Justin Lin, 2017
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* @license https://opensource.org/licenses/lgpl-3.0.html
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*
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* @see https://openhome.cc/eGossip/OpenSCAD/lib-rounded_extrude.html
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*
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**/
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include <__private__/__frags.scad>;
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include <__private__/__is_vector.scad>;
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module rounded_extrude(size, round_r, angle = 90, twist = 0, convexity = 10) {
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is_vt = __is_vector(size);
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x = is_vt ? size[0] : size;
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y = is_vt ? size[1] : size;
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q_corner_frags = __frags(round_r) / 4;
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step_a = angle / q_corner_frags;
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twist_step = twist / q_corner_frags;
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module layers(pre_x, pre_y, pre_h = 0, i = 1) {
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module one_layer(current_a) {
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wx = pre_x;
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wy = pre_y;
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h = (round_r - pre_h) - round_r * cos(current_a);
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d_leng =
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round_r * (sin(current_a) - sin(step_a * (i - 1)));
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sx = (d_leng * 2 + wx) / wx;
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sy = (d_leng * 2 + wy) / wy;
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translate([0, 0, pre_h])
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rotate(-twist_step * (i - 1))
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linear_extrude(
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h,
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slices = 1,
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scale = [sx, sy],
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convexity = convexity,
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twist = twist_step
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) scale([wx / x, wy / y])
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children();
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layers(wx * sx, wy * sy, h + pre_h, i + 1)
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children();
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}
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if(i <= q_corner_frags) {
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one_layer(i * step_a)
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children();
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} else if(i - q_corner_frags < 1) {
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one_layer(q_corner_frags * step_a)
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children();
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}
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}
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layers(x, y)
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children();
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}
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