GeometryRecipes.jl

GeometryRecipes.jl

module GeometryRecipes

using RecipesBase
using StaticArrays:FieldVector
using Random

# types
export Point2D, Point3D, Circle2D, Circle3D

struct Point2D{T} <: FieldVector{2,T}
    x::T
    y::T
end

struct Point3D{T} <: FieldVector{3,T}
    x::T
    y::T
    z::T
end

struct Circle2D{T}
    p::Point2D{T}
    r::T
end

struct Circle3D{T}
    p::Point3D{T}
    r::T
end

const GeometryObj = Union{Point2D,Point3D,Circle2D,Circle3D}

Random.rand(rng::AbstractRNG, ::Random.SamplerType{Point2D}) = Point2D(rand(rng, 2))
Random.rand(rng::AbstractRNG, ::Random.SamplerType{Circle2D}) = Circle2D(Point2D(rand(rng, 2)), rand(rng))
Random.rand(rng::AbstractRNG, ::Random.SamplerType{Point3D}) = Point3D(rand(rng, 3))
Random.rand(rng::AbstractRNG, ::Random.SamplerType{Circle3D}) = Circle3D(Point3D(rand(rng, 3)), rand(rng))

# recipes
@recipe function f(pt::Point2D)
    seriestype := :scatter
    label --> :none
    [(pt.x, pt.y)]
end

@recipe function f(pt::Point3D)
    seriestype := :scatter
    label --> :none
    [pt.x], [pt.y], [pt.z]
end

@recipe function f(c::Circle2D)
    seriestype := :shape
    linecolor --> :black
    aspect_ratio --> :equal
    fillalpha --> 0.25
    label --> :none
    θ = 0:0.1:2π
    c.p.x .+ c.r .* cos.(θ), c.p.y .+ c.r .* sin.(θ)
end

@recipe function f(c::Circle3D)
    seriestype := :scatter
    label --> :none
    markersize --> 10c.r
    [c.p.x], [c.p.y], [c.p.z]
end

const GeometyObj = Union{Point2D,Point3D,Circle2D,Circle3D}

@recipe function f(geomobjs::AbstractArray{<:GeometryObj})
    for obj in geomobjs
        @series begin
            obj
        end
    end
end

@recipe f(geomobjs::T...) where T <: GeometyObj = collect(geomobjs)

end # module

See https://www.youtube.com/watch?v=rWspPMA_4Tk&t=4265s