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Update Rounding the Cube.md

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Richard Milewski 2024-02-03 00:36:12 -08:00
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tutorials/Rounding the Cube.md
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@ -98,21 +98,13 @@ cuboid([100,80,60], rounding=20, except = [[1,0,1,0],[0,1,0,1],[1,0,0,1]]);
###Negative Rounding
You can fillet top or bottom edges by using negative rounding values. Note that you cannot use negative rounding values on Z-aligned (side) edges.
You can fillet top or bottom edges by using negative rounding values. Note that you cannot use negative rounding values on Z-aligned (side) edges. If you need to add a fillet on a Z-aligned edge, use [fillet()](https://github.com/BelfrySCAD/BOSL2/wiki/shapes3d.scad#module-fillet):
```openscad-3D
include <BOSL2/std.scad>
cuboid([100,80,60], rounding=-20, edges = BOTTOM);
```
If you need to add a fillet on a Z-aligned edge, use [fillet()](https://github.com/BelfrySCAD/BOSL2/wiki/shapes3d.scad#module-fillet):
```openscad-3D
include <BOSL2/std.scad>
cuboid([100,80,60], rounding = -10, edges = BOT+FRONT)
position(FRONT+RIGHT)
fillet(l=60, r=10, spin=180);
```
###Chamfering
@ -315,6 +307,27 @@ right(30){
}
```
Alternatively, we can keep k constant at k=0.5 and vary the joint length:
```openscad-3D;ImgOnly NoScales Med VPD=170 VPR=[75,0,25]
include <BOSL2/std.scad>
include <BOSL2/rounding.scad>
left(30) {
rounded_prism(rect(20), height=20, joint_top=1, joint_bot=1, joint_sides=1, k = 0.5);
move([0,-13,-13]) xrot(90) color("black") text3d("joint=1", size=3, h = 0.01, anchor= CENTER);
}
right(0){
rounded_prism(rect(20), height=20, joint_top=5, joint_bot=5, joint_sides=5, k = 0.5);
move([0,-13,-13]) xrot(90) color("black") text3d("joint=5", size=3, h = 0.01, anchor= CENTER);
}
right(30){
rounded_prism(rect(20), height=20, joint_top=9, joint_bot=9, joint_sides=9, k = 0.5);
move([0,-13,-13]) xrot(90) color("black") text3d("joint=9", size=3, h = 0.01, anchor= CENTER);
}
```
You can match the cicrular roundover of cuboid() by setting the joint values to the rounding used in cuboid() and setting the k value to 0.93:
```openscad-3D: Med