minor doc update

plut · Nov 16, 2021 · 81f631d · 81f631d · plut · Nov 16, 2021
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diff --git a/TODO.md b/TODO.md
@@ -7,9 +7,7 @@
  - [x] clarify priority: `linear_extrude(8)*(5*object)`
  - [x] projection of hollow sphere does not work: replace the temporary
    fix by something better (but this is likely Clipper's fault)
- - [ ] simple syntax for making conditionals (⇒ use those empty objects)
-   - [ ] or also allow `Nothing` in vectors of objects
-   - [x] even better, `EmptyUnion`
+ - [x] simple syntax for making conditionals (⇒ use those empty objects)
 # Simple fixes
  - [x] `atol`/`rtol` ?
  - [x] auto-compute `offset` npoints from meshing options
@@ -26,6 +24,7 @@
   - [ ] allow `NamedTuple` for this
   - [ ] possible via `move(origin, s...; direction, spin)`
 # Code cleaning
+ - [ ] replace `include` by something using `FileIO` e.g. `.cg.jl`?
  - [x] https://www.usenix.org/legacy/event/usenix05/tech/freenix/full_papers/kirsch/kirsch.pdf : CSG tree normalization (only useful when using `convexity` rendering...)
  - [x] split `Offset` in two structures `OffsetShape` and `OffsetVolume`
  - [x] make transformations even lazier, so that they are evaluated only once

diff --git a/docs/src/operations.md b/docs/src/operations.md
@@ -69,6 +69,10 @@ display(union(square(1)))
  - symbolic complements are replaced by the appropriate values:
 ```@repl 0
 display(intersect(square(1), ~circle(1), polygon([])))
+```
+ - empty unions and intersections are removed:
+```@repl 0
+display(union(square(1),union(),circle(1)))
 ```
 
 ## Convex hull