Merge pull request #21 from JuliaGeometry/sd/fix4wgl

fixes

Author: SimonDanisch

src/basic_types.jl

@@ -362,7 +362,7 @@ end
 
 function Base.propertynames(mesh::Mesh)
     names = propertynames(getfield(mesh, :simplices))
-    if :positions in names
+    if :position in names
         return names
     else
         # a mesh always has positions!

src/geometry_primitives.jl

@@ -361,6 +361,10 @@ function coordinates(s::Circle, nvertices=64)
     return (inner(fi) for fi in LinRange(0, 2pi, nvertices))
 end
 
+function texturecoordinates(s::Circle, nvertices=64)
+    return coordinates(Circle(Point2f0(0.5), 0.5f0), nvertices)
+end
+
 function coordinates(s::Sphere, nvertices=24)
     θ = LinRange(0, pi, nvertices); φ = LinRange(0, 2pi, nvertices)
     inner(θ, φ) = Point(cos(φ)*sin(θ), sin(φ)*sin(θ), cos(θ)) .* s.r .+ s.center

src/meshes.jl

@@ -117,10 +117,12 @@ function mesh(primitive::GeometryPrimitive;
             attributes[:normals] = primitive_normals
         else
             # Normals not implemented for primitive, so we calculate them!
-            attributes[:normals] = normals(positions, faces)
+            n = normals(positions, faces)
+            if n !== nothing # ok jeez, this is a 2d mesh which cant have normals
+                attributes[:normals] = n
+            end
         end
     end
-
     return Mesh(meta(positions; attributes...), faces)
 end