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add halfspace

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This commit is contained in:
zhao
2023-01-12 00:28:36 -05:00
parent 0b05249d7b
commit 933b2d9d73
4 changed files with 24 additions and 6 deletions
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2
helper/common.scad
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@ -3,7 +3,7 @@
*/ */
$fn=64; $fn=64;
// TODO move these to math
eps=0.0001; eps=0.0001;
inf10 = 10; inf10 = 10;

16
helper/halfspace.scad
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@ -1,2 +1,14 @@
// TODO
// probably want to get rotations first // Wake up sheeple. Halfspaces are just really BIG cubes!
include <./math.scad>
include <./common.scad>
module halfspace(vpos, p) {
translate(p)
align(a=[0,0,1], b=vpos)
translate(v=[0,0,-inf/2])
cube(size=[inf, inf, inf], center=true);
}
halfspace(vpos=[1,1,1], p=[10,10,10]);

9
helper/math.scad
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@ -10,3 +10,12 @@ function mirror4XY(midpoint, offsetX, offsetY) =
[midpoint[0]-offsetX, midpoint[1]+offsetY, midpoint[2]], [midpoint[0]-offsetX, midpoint[1]+offsetY, midpoint[2]],
[midpoint[0]-offsetX, midpoint[1]-offsetY, midpoint[2]], [midpoint[0]-offsetX, midpoint[1]-offsetY, midpoint[2]],
[midpoint[0]+offsetX, midpoint[1]-offsetY, midpoint[2]]]; [midpoint[0]+offsetX, midpoint[1]-offsetY, midpoint[2]]];
module align(a,b) {
rot_axis = cross(a,b);
angle = acos(a*b/ (norm(a)*norm(b)));
rotate(v=rot_axis, a=angle)
children(0);
}

3
helper/rotation.scad
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@ -1,3 +0,0 @@
// TODO
// eg transformation to rotate vector a to vector b, etc