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refactor - introduce config folder, and other misc changes

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This commit is contained in:
zhao
2023-06-23 21:52:27 -04:00
parent 752b26bff5
commit 02f0155216
86 changed files with 234 additions and 434 deletions
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63
helper/math.scad
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@ -1,11 +1,20 @@
// TODO remove/rename this file
/* Example usage:
for (i=mirror4XY(midpoint=[0,0,0], offsetX=90, offsetY=90)) {
translate(v=i)
something();
}
*/
// Some misc math-y utils
$fn=64;
eps=0.0001;
inf10 = 10;
inf50 = 50;
inf1000 = 1000;
inf = inf1000;
function unit(v) = v/norm(v);
function lerp(a, b, t) = (b * t + a * (1 - t));
/* Example usage:
for (i=mirror4XY(midpoint=[0,0,0], offsetX=90, offsetY=90))
{ translate(v=i) something(); }
*/
module mirror4XY(p, dx, dy) {
px = p[0];
@ -24,20 +33,18 @@ module mirror4XY(p, dx, dy) {
children(0);
}
// Generate a 4x4 matrix that causes a change of basis
// such that the origin is at point p0, the x axis is aligned
// from p0 to p1 and point p2 is in the first quadrant.
// Copied and pasted from https://trmm.net/Basis/
module align_to(p0,p1,p2) {
/* Generate a 4x4 matrix that causes a change of basis
such that the origin is at point p0, the x axis is aligned
from p0 to p1 and point p2 is in the first quadrant.
Copied and pasted from https://trmm.net/Basis/
*/
module alignTo(p0,p1,p2) {
x = unit(p1-p0);
yp = unit(p2-p0);
z = unit(cross(x,yp));
y = unit(cross(z,x));
echo(p0,p1,p2);
echo(x,y,z);
multmatrix([
[x[0], y[0], z[0], p0[0]],
[x[1], y[1], z[1], p0[1]],
@ -47,5 +54,27 @@ module align_to(p0,p1,p2) {
children();
}
function unit(v) = v/norm(v);
function lerp(a, b, t) = (b * t + a * (1 - t));
module halfspace(vpos, p) {
ref = [0,0,-1];
if (cross(ref, vpos) == [0,0,0]) {
translate(p)
translate(v=[0,0, (ref*vpos) * -inf/2])
cube(size=[inf, inf, inf], center=true);
} else {
translate(p)
alignPlanar(a=ref, b = vpos)
translate(v = [0, 0, -inf/2])
cube(size = [inf, inf, inf], center = true);
}
}
module alignPlanar(a,b) {
rot_axis = cross(a,b);
angle = acos(a*b/(norm(a)*norm(b)));
rotate(v=rot_axis, a=angle)
children(0);
}