Add the ear generation in this file.
This commit is contained in:
Ajabep
parent
2ac86c04a9
commit
8d0fae7652
1 changed files with 362 additions and 19 deletions
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@ -12,13 +12,6 @@
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* https://www.thingiverse.com/thing:5029374
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* https://www.thingiverse.com/thing:5029374
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* printed at scale 0.2 as glue-ins for additional ears.
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* printed at scale 0.2 as glue-ins for additional ears.
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*
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*
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* `Ohren_4.stl` and `catears.stl` need to be placed in `../stls/`
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* for the symlinks to work otherwise `catears.stl` needs to be placed
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* at `./catears.stl` and `Ohren_4.stl` at `./catear.stl`.
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*
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* Version of the modification: 1.0
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*
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* See examples.scad for examples on how to use this module.
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*
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*
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* The contents of this file are licenced under CC-BY-SA 3.0 Unported.
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* The contents of this file are licenced under CC-BY-SA 3.0 Unported.
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* See https://creativecommons.org/licenses/by-sa/3.0/deed for the
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* See https://creativecommons.org/licenses/by-sa/3.0/deed for the
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@ -73,11 +66,6 @@ $fn = 360;
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* font: the path to a font for Write.scad.
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* font: the path to a font for Write.scad.
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*/
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*/
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/**
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* currently openscad fails to render the original `Ohren_4.stl` outside of the preview mode
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* according to [the wiki](https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/FAQ#Why_is_my_imported_STL_file_appearing_with_F5_but_not_F6?) this is the stls fault
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* using meshlab to run `Filters` -> `Cleaning and Repairing` -> `Remove T-Vertices` by `Edge-Flip` with `Ratio` of `1000000` before importing the stl works but but two errors remain.
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*/
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scale([0.2, 0.2, 0.2]) {
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scale([0.2, 0.2, 0.2]) {
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render_bottle_clip(
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render_bottle_clip(
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name=NAME,
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name=NAME,
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@ -248,11 +236,366 @@ module outer_cutoff(rl, e, ru, ht, width) {
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}
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}
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}
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}
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module ear() {
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/**
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if (USE_TINY_EARS) {
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* Will create a pair of ears to the bottle clip. By default, they are cat ears.
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rotate(-90, [0, 0, 1]) union() {
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*
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scale([1, 1 ,1]) translate([0, -85]) import("catear.stl");
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* Parameters:
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scale([1, -1, 1]) translate([0, -85]) import("catear.stl");
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*
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}
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* Positioning:
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* ht: the height of the bottle clip, used to scale the ears
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* ru: the radius on the upper side of the clip, used to position the ears
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* rl: the radius on the lower side of the clip, used to position the ears
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* clip_width: the thickness of the bottle clip
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*
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* Ears:
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* space_between_ears: Space between both ears.
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* ear_tilt: The X orientation of the ears, to give a more organic look. Angle in degree
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*
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* ear_depth: the depth of the ear
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* ear_thickness: the thickness of the ear arcs
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* ear_side_len: the length of one side of the ear base triangle
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* ear_bend_factor: how much the ear is bent. 1 = half circle, 0.00001 = almost straight
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* ear_stretch_factor: how much the ear is stretched, useful for fox ears or this kind of shapes
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*
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* ear_chamfer: size of the chamfer to apply to the edges
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* ear_chamfer_shape: The shape of the chamfer: "cone", "curve", "curve-in", "pyramid", maybe some others
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* ear_details: whether to chamfer also the partial arcs
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*
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*/
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module ears(ht, ru, rl, clip_width, space_between_ears = 15, ear_tilt = 15, ear_depth=2, ear_thickness=.6, ear_side_len=6, ear_bend_factor=0.5, ear_stretch_factor=1.2, ear_chamfer=1, ear_chamfer_shape="curve", ear_details=true) {
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// This is the radius on which the ears has to be to be centered on the clip.
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radius = ru+(clip_width/2);
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// Math time!
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// The ears are not that bad without this calculation, but I want to improve the base and the join between ears and the clip.
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// Actually, by tilting the ear, a side of the end will go deeper withing the clip, but the other side may be separated from the clip.
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// So we need to translate the ears more deeper within the clip to avoid any separation
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//
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// So! Trigonometry!
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//
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// Viewed from the right of the ear, an ear is like that:
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//
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// A
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// |\
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// | \
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// h | \ s
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// | \
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// +----\ D
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// C l \
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// \
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// \
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// \
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// B
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//
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// A is the side of the ear which is going upper
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// B is the side of the ear which is going deeper
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// C is the clip level
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// D is the midpoint between A and B
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// s is the depth of the ear (from A to B!)
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// h is the heigh we are searching for. We will lower the ear of this size.
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// l is the half of length of the fingerprint of the ear in the clip.
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// ADC is the tilt angle
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// ACD is a 90 degree angle
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//
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// So, to find the h length, we can use s and the angle ADC.
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//
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// CAH => We don't have the adjacent length. So, we can't use this formula
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// SOH => sin(ADC) = h / (s/2)
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// TOA => We don't have the adjacent length. So, we can't use this formula
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//
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// sin(ADC) = h / (s/2)
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// sin(ADC) * (s/2) = h
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//
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// BUT! Since we will raise the Clip level C to the end of the ear A, the print of the ear within the clip will be shifted of `l`!
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// So, let's calculate it!
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//
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//
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// CAH => cos(ADC) = l / (s/2)
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// SOH => Is not targeting what we want.
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// TOA => The opposed side is less precise than the hypothenus, so, we will not use this formula
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//
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// cos(ADC) = l / (s/2)
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// cos(ADC) * (s/2) = l
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tilt_compensation = sin(ear_tilt) * (ear_depth/2);
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tilt_shift = cos(ear_tilt) * (ear_depth/2);
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// Pythagoras!
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// Viewed from the top, an ear is like that:
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//
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// A s
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// +----- E
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// | /
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// x | / r
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// | /
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// |/
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// c
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//
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// c is the center of the circle forming the top surface of the clip
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// E is the perfect position of the ear
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// r is the radius, calculated previously
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// s is the half of the space between ears
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// x is the position of the ears on the Y axis. It's what we want to calculate
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// A is the projection of the ears on the Y axis
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// A is a 90 degrees angle
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//
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// x**2 + s**2 = r**2
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// x**2 = r**2 - s**2
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// x = sqrt( r**2 - s**2 )
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s = space_between_ears / 2;
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pos_ears_yaxis = sqrt(pow(radius, 2) - pow(s, 2));
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// Trigonometry!
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// Now, lets, rotate the ears to be at tangent to the clip
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//
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// From the top, an ear is like this:
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//
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// A s
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// +------- E
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// | /
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// | /
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// x | / r
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// | /
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// | /
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// | /
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// |/
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// C
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//
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// E is the position of the ears
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// C is the center of the clip
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// A is the projection of the ears on the Y axis
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// r is the radius
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// s is the half of the space between the ears.
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// x is the same from the last figure.
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// A is a 90 degrees angle
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//
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// The angle of the ear is the same as the angle ACE.
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// So, we need to calculate this angle
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//
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// Since, we already know every lengths s, r and x, we can choose the formula we want!
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// IDK which one is faster, but that could be a nice optimization.
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//
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// CAH => cos(ACE) = x/r
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// SOH => sin(ACE) = s/r
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// TOA => tan(ACE) = x/s
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//
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// Let's choose the sine, since it's linked to the our best raw non-rounded values. It will give us values with the best accuracy.
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ears_angle = asin(s/radius);
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// Like that, it's good enough. And it could be committed like that. Actually, my first model (never published it) was like that.
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// BUT we can do better and smarter! (and we will probably need to refine it)
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// If we stop our math here, we centered the middle of the ear on the clip. But the end of the ears are NOT centered.
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//
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// So, we will use (again) Pythagoras!
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// We want to position the ear (on its center) to put the end of the ear in the radius.
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//
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// Form the top, an ear looks like that:
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// e
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// /|
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// / |
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// / |
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// r / | h
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// / |
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// / |
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// / |
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// C /-------+ E
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// p
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//
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// C is the center of the clip
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// e is the end of the ear
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// E is the middle of the ear.
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// r is the Radius
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// h is the half of the width of the ear
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// E is a 90 degrees angles
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// p is wanted length to position correctly the center of the ear.
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//
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// h**2 + p**2 = r**2
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// p**2 = r**2 - h**2
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// p = sqrt(r**2 - h**2)
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center_radius = sqrt( pow(radius, 2) - pow((ear_side_len+(tilt_shift))/2, 2) );
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// So, we need to update the projection of the ears on the Y axis, based on center_radius, instead of radius.
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pos_ears_yaxis_end_ear = sqrt(pow(center_radius, 2) - pow(s, 2));
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translate([0, -pos_ears_yaxis_end_ear, ht-tilt_compensation-(ear_thickness/2)])
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rotate(90, [0, 0, 1])
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rotate(90, [0, 1, 0])
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union() {
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scale([1, 1 ,1])
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translate([0, space_between_ears/2, 0])
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rotate(ears_angle, [1, 0, 0])
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rotate(-ear_tilt, [0, 1, 0])
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ear(
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depth=ear_depth,
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thickness=ear_thickness,
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side_len=ear_side_len,
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bend_factor=ear_bend_factor,
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stretch_factor=ear_stretch_factor,
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chamfer=ear_chamfer,
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chamfer_shape=ear_chamfer_shape,
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details=ear_details
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);
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scale([1, -1, 1])
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translate([0, space_between_ears/2, 0])
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rotate(ears_angle, [1, 0, 0])
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rotate(-ear_tilt, [0, 1, 0])
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ear(
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depth=ear_depth,
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thickness=ear_thickness,
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side_len=ear_side_len,
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bend_factor=ear_bend_factor,
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stretch_factor=ear_stretch_factor,
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chamfer=ear_chamfer,
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chamfer_shape=ear_chamfer_shape,
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details=ear_details
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);
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}
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}
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/**
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* Module that creates an ear shape.
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*
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* Parameters:
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*
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* depth: the depth of the ear
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* thickness: the thickness of the ear arcs
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* side_len: the length of one side of the ear base triangle
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* bend_factor: how much the ear is bent. 1 = half circle, 0.00001 = almost straight
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* stretch_factor: how much the ear is stretched, useful for fox ears or this kind of shapes
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*
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* chamfer: size of the chamfer to apply to the edges
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* chamfer_shape: The shape of the chamfer: "cone", "curve", "curve-in", "pyramid", maybe some others
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* details: whether to chamfer also the partial arcs
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*
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* By default, this module creates an ear.
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*
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* I don't remember the original author of this module. I refactored it and improved it a bit. Documentation is from me.
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*/
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module ear(depth, thickness, side_len=30, bend_factor=0.5, stretch_factor=1.2, chamfer=1, chamfer_shape="curve", details=true) {
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depth = depth == undef ? 20 : depth ;
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thickness = thickness == undef ? 3 : thickness ;
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echo("Generating ONE single ear",
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depth = depth,
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thickness = thickness,
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side_len = side_len,
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bend_factor = bend_factor,
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stretch_factor = stretch_factor,
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chamfer = chamfer,
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chamfer_shape = chamfer_shape,
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details = details
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);
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$A=[0, side_len/2];
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$B=[0,-side_len/2];
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$C=[-(side_len/2/sin(120))*1.5*stretch_factor, 0];
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$c=sqrt(pow($A.x-$B.x, 2)+pow($A.y-$B.y, 2));
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$b=sqrt(pow($A.x-$C.x, 2)+pow($A.y-$C.y, 2));
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$a=sqrt(pow($C.x-$B.x, 2)+pow($C.y-$B.y, 2));
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$hc=-$C.x;
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$alpha=asin($hc/$b);
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$beta=$alpha;
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$gamma=180-$alpha-$beta;
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$delta=180*bend_factor;
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$bend_radius=$a/(2*cos(90-$delta/2));
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$bend_offset=$bend_radius*sin(90-$delta/2);
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translate([0, -$c/2, 0])
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rotate($beta, [0, 0, 1])
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translate([0, $a/2, 0])
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translate([$bend_offset, 0, 0])
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color("#00ffff")
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chamfer(size=(details)?chamfer:0, child_h=depth, child_bot=-depth/2, shape=chamfer_shape)
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partial_ring(
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part=$delta/360,
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radius=$bend_radius,
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thickness=thickness,
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height=depth
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);
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translate([0, $c/2, 0])
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rotate(-$alpha, [0, 0, 1])
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translate([0, -$b/2, 0])
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translate([$bend_offset, 0, 0])
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color("#ff00ff")
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chamfer(size=(details)?chamfer:0, child_h=depth, child_bot=-depth/2, shape=chamfer_shape)
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partial_ring(
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part=$delta/360,
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radius=$bend_radius,
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thickness=thickness,
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height=depth
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);
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translate($A) color("#aaaaaa")
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chamfer(size=chamfer, child_h=depth, child_bot=-depth/2, shape=chamfer_shape)
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cylinder(h=depth, d=thickness, center=true);
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translate($B) color("#bbbbbb")
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chamfer(size=chamfer, child_h=depth, child_bot=-depth/2, shape=chamfer_shape)
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cylinder(h=depth, d=thickness, center=true);
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translate($C) color("#cccccc")
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chamfer(size=chamfer, child_h=depth, child_bot=-depth/2, shape=chamfer_shape)
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cylinder(h=depth, d=thickness, center=true);
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}
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/**
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* This module is not mine.
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*/
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module partial_ring(part, radius, thickness, height) {
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rotate(180-180*part, [0, 0, 1])
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rotate_extrude(angle=360*part)
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translate([radius, 0])
|
||||||
|
square([thickness, height], center=true);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* This module is not mine.
|
||||||
|
*/
|
||||||
|
module chamfer(size=2, child_h=5, child_bot=0, shape="curve") {
|
||||||
|
chamfer_size=size;
|
||||||
|
|
||||||
|
module chamfer_shape() {
|
||||||
|
if (shape == "cone") {
|
||||||
|
$fn=16;
|
||||||
|
cylinder(chamfer_size/2,chamfer_size/2,0);
|
||||||
|
} else if (shape == "curve") {
|
||||||
|
$fn=4;
|
||||||
|
for( y = [0:1/$fn:1]) {
|
||||||
|
cylinder(chamfer_size/2*(1-y),chamfer_size/2/cos(180/$fn)*y,0);
|
||||||
|
}
|
||||||
|
} else if (shape == "curve-in") {
|
||||||
|
$fn=16;
|
||||||
|
intersection() {
|
||||||
|
sphere(chamfer_size/2/cos(180/$fn));
|
||||||
|
translate([0,0,chamfer_size/2])
|
||||||
|
cube(chamfer_size, center=true);
|
||||||
|
}
|
||||||
|
} else if (shape == "pyramid") {
|
||||||
|
$fn=4;
|
||||||
|
cylinder(chamfer_size/2/cos(180/$fn),chamfer_size/2,0);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
module lower_chamfer() {
|
||||||
|
minkowski()
|
||||||
|
{
|
||||||
|
linear_extrude(0.0001) difference() {
|
||||||
|
square([1000,1000],center=true);
|
||||||
|
projection()children(0);
|
||||||
|
}
|
||||||
|
chamfer_shape();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
module upper_chamfer() {
|
||||||
|
scale([1,1,-1])lower_chamfer()children();
|
||||||
|
}
|
||||||
|
|
||||||
|
render()difference() {
|
||||||
|
children();
|
||||||
|
translate([0,0,child_bot])lower_chamfer()children();
|
||||||
|
translate([0,0,child_bot+child_h])upper_chamfer()children();
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue