Merge pull request #134 from OliverEvans96/rect-area

Implement area, volume functions for rectangles

Author: SimonDanisch

src/GeometryBasics.jl

@@ -63,7 +63,7 @@ export HyperSphere, Circle, Sphere
 export Cylinder, Cylinder2, Cylinder3, Pyramid, extremity
 export HyperRectangle, Rect, Rect2D, Rect3D, IRect, IRect2D, IRect3D, FRect, FRect2D, FRect3D
 export before, during, isinside, isoutside, meets, overlaps, intersects, finishes
-export centered, direction, area, update
+export centered, direction, area, volume, update
 export max_dist_dim, max_euclidean, max_euclideansq, min_dist_dim, min_euclidean
 export min_euclideansq, minmax_dist_dim, minmax_euclidean, minmax_euclideansq
 export self_intersections, split_intersections

src/primitives/rectangles.jl

@@ -164,6 +164,9 @@ widths(prim::Rect) = prim.widths
 width(prim::Rect) = prim.widths[1]
 height(prim::Rect) = prim.widths[2]
 
+volume(prim::HyperRectangle) = prod(prim.widths)
+area(prim::Rect2D) = volume(prim)
+
 """
     split(rectangle, axis, value)
 

test/runtests.jl

@@ -12,6 +12,10 @@ using GeometryBasics: attributes
     @test area(cube_vertices, cube_faces) == 6
     mesh = Mesh(cube_vertices, cube_faces)
     @test GeometryBasics.volume(mesh) ≈ 1
+    @test GeometryBasics.volume(cube) ≈ 1
+
+    rect = Rect(1, 2, 7.5, 2.0)
+    @test GeometryBasics.area(rect) ≈ 15
 
     points_cwise = Point2f0[(0,0), (0,1), (1,1)]
     points_ccwise = Point2f0[(0,0), (1,0), (1,1)]