Trackball/hardware/util.scad

/*
 * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
 *                           Philipp Schönberger (mail@phschoen.de)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * See <http://www.gnu.org/licenses/>.
 */

function sphere_r_at_h(h, r) = r * sin(acos(h / r));
function sphere_angle_at_rh(h, r) = acos(h / r);


module fully_rounded_cube(p,r,center)
{
    for(x=[r,p[0]-r],
        y=[r,p[1]-r],
        z=[r,p[2]-r])
    {
        translate([x,y,z])
        sphere(r,$fn=$fn/4);
    }
}

module rounded_cube(x, y, z, r)
{
    hull()
    for (tx = [r, x - r])
    for (ty = [r, y - r])
    translate([tx, ty, 0])
    cylinder(d = r * 2, h = z);
}

module eps(dir="z")
{
    if(dir== "x")
        tranlate([-$e,0,0])
        children();
    if(dir== "y")
        translate([0,-$e,0])
        children();
    if(dir== "z")
        translate([0,0,-$e])
        children();
}