julia - Meshes.jl 错误 : UndefVarError: P2 not defined

Question

我试图从 Meshes.jl 测试源代码中运行一些代码，但它失败了。我错过了什么？

using Meshes

points = P2[(0,0), (1,0), (0,1), (1,1), (0.5,0.5)]
#ERROR: UndefVarError: P2 not defined
#Stacktrace:
# [1] top-level scope
#   @ REPL[2]:1

代码来自这里: https://github.com/JuliaGeometry/Meshes.jl/blob/bcc08b0b53622f2578c61561fef91153c05c393b/test/mesh.jl#L176

Answer 1

如果您查看 runtests.jl 文件 ( https://github.com/JuliaGeometry/Meshes.jl/blob/bcc08b0b53622f2578c61561fef91153c05c393b/test/runtests.jl#L118 )，P2 被定义为 Point{2, Float64} 的别名。

T = Float64
P1, P2, P3 = Point{1,T}, Point{2,T}, Point{3,T}

如果您运行这两行，您的示例代码将起作用。

或者，您可以将您的点定义为:

points = Point[(0,0), (1,0), (0,1), (1,1), (0.5,0.5)]