Fix errors when building docs (#322)

Author: asinghvi17

src/methods/barycentric.jl

@@ -26,8 +26,8 @@ export MeanValue
 # This example was taken from [this page of CGAL's documentation](https://doc.cgal.org/latest/Barycentric_coordinates_2/index.html).
 #=
 ```@example barycentric
-import GeometryOps as GO
-using Makie, CairoMakie, GeoInterfaceMakie
+import GeometryOps as GO, GeoInterface as GI
+using CairoMakie, GeoInterfaceMakie # plotting
 # Define a polygon
 polygon_points = Point3f[
 (0.03, 0.05, 0.00), (0.07, 0.04, 0.02), (0.10, 0.04, 0.04),
@@ -84,10 +84,10 @@ cb = Colorbar(f[2, :], p1.plots[1]; vertical = false, flipaxis = true)
 xrange = LinRange(ext.X..., 400)
 yrange = LinRange(ext.Y..., 400)
 @time mean_values = GO.barycentric_interpolate.(
-    (MeanValue(),), # The barycentric coordinate algorithm (MeanValue is the only one for now)
-    (Point2f.(polygon_points),), # The polygon points as `Point2f`
+    (GO.MeanValue(),), # The barycentric coordinate algorithm (MeanValue is the only one for now)
+    ((polygon_points),), # The polygon points as `Point2f`
     (last.(polygon_points,),),   # The values per polygon point - can be anything which supports addition and division
-    Point2f.(xrange, yrange')    # The points at which to interpolate
+    tuple.(xrange, yrange')    # The points at which to interpolate
 )
 # and render!
 hm = heatmap!(a2, xrange, yrange, mean_values; colormap = p1.colormap, colorrange = p1.plots[1].colorrange[], xautolimits = false, yautolimits = false)

src/methods/convex_hull.jl

@@ -19,7 +19,7 @@ Future work could include other algorithms, such as [Quickhull.jl](https://githu
 import GeometryOps as GO, GeoInterface as GI
 using CairoMakie # to plot
 
-points = randn(GO.Point2f, 100)
+points = tuple.(randn(100), randn(100))
 f, a, p = plot(points; label = "Points")
 hull_poly = GO.convex_hull(points)
 lines!(a, hull_poly; label = "Convex hull", color = Makie.wong_colors()[2])
@@ -59,7 +59,7 @@ most algorithms are robust to that, and you can always [`fix`](@ref) it...
 import GeoInterface as GI, GeometryOps as GO, LibGEOS as LG
 using CairoMakie # to plot
 
-points = rand(Point2{Float64}, 100)
+points = tuple.(rand(100), rand(100))
 go_hull = GO.convex_hull(GO.MonotoneChainMethod(), points)
 lg_hull = GO.convex_hull(GO.GEOS(), points)
 

src/methods/distance.jl

@@ -18,8 +18,7 @@ To provide an example, consider this rectangle:
 ```@example rect
 import GeometryOps as GO
 import GeoInterface as GI
-using Makie
-using CairoMakie
+using CairoMakie, GeoInterfaceMakie
 
 rect = GI.Polygon([[(0,0), (0,1), (1,1), (1,0), (0, 0)]])
 point_in = (0.5, 0.5) 
@@ -43,8 +42,8 @@ GO.signed_distance(point_out, rect)  # > 0
 Consider also a heatmap of signed distances around this object:
 ```@example rect
 xrange = yrange = LinRange(-0.5, 1.5, 300)
-f, a, p = heatmap(xrange, yrange, GO.signed_distance.(Point2f.(xrange, yrange'), Ref(rect)); colormap = :RdBu, colorrange = (-0.75, 0.75))
-a.aspect = DataAspect(); Colorbar(f[1, 2], p, label = "Signed distance"); lines!(a, GI.convert(GO.GeometryBasics, rect)); f
+f, a, p = heatmap(xrange, yrange, GO.signed_distance.(tuple.(xrange, yrange'), (rect,)); colormap = :RdBu, colorrange = (-0.75, 0.75))
+a.aspect = DataAspect(); Colorbar(f[1, 2], p, label = "Signed distance"); lines!(a, rect); f
 ```
 
 ## Implementation