Add isempty

Author: timholy

Project.toml

@@ -1,7 +1,7 @@
 name = "GeometryBasics"
 uuid = "5c1252a2-5f33-56bf-86c9-59e7332b4326"
 authors = ["SimonDanisch <[email protected]>"]
-version = "0.3.4"
+version = "0.3.5"
 
 [deps]
 EarCut_jll = "5ae413db-bbd1-5e63-b57d-d24a61df00f5"

src/primitives/rectangles.jl

@@ -308,6 +308,13 @@ end
 ###
 # set operations
 
+"""
+    isempty(h::Rect)
+
+Return `true` if any of the widths of `h` are negative.
+"""
+Base.isempty(h::Rect{N,T}) where {N,T} = any(<(zero(T)), h.widths)
+
 """
 Perform a union between two Rects.
 """

test/geometrytypes.jl

@@ -105,6 +105,8 @@ end
                              [2, 2, 2], [2, 2, 1], [1, 2, 1], [1, 2, 2]]
     @test decompose(Point{3,Int}, b) == pt_expb
     mesh = normal_mesh(b)
+
+    @test isempty(Rect{3,Float32}())
 end
 
 NFace = NgonFace