be lazy + let promotion do the rest

Author: SimonDanisch

src/rectangles.jl

@@ -551,14 +551,14 @@ function coordinates(rect::Rect3D, nvertices=nothing)
     # TODO use n
     w = widths(rect)
     o = origin(rect)
-    return map(x -> Point3f0(x .* w .+ o), [
-        [0, 0, 0], [0, 0, 1], [0, 1, 1], [0, 1, 0],
-        [0, 0, 0], [1, 0, 0], [1, 0, 1], [0, 0, 1],
-        [0, 0, 0], [0, 1, 0], [1, 1, 0], [1, 0, 0],
-
-        [1, 1, 1], [0, 1, 1], [0, 0, 1], [1, 0, 1],
-        [1, 1, 1], [1, 0, 1], [1, 0, 0], [1, 1, 0],
-        [1, 1, 1], [1, 1, 0], [0, 1, 0], [0, 1, 1]
+    return ((x .* w .+ o) for x in Point{3, Int}[
+        (0, 0, 0), (0, 0, 1), (0, 1, 1), (0, 1, 0),
+        (0, 0, 0), (1, 0, 0), (1, 0, 1), (0, 0, 1),
+        (0, 0, 0), (0, 1, 0), (1, 1, 0), (1, 0, 0),
+
+        (1, 1, 1), (0, 1, 1), (0, 0, 1), (1, 0, 1),
+        (1, 1, 1), (1, 0, 1), (1, 0, 0), (1, 1, 0),
+        (1, 1, 1), (1, 1, 0), (0, 1, 0), (0, 1, 1)
     ])
 end