Reposted by Alexander Kmoch @allixender
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Alexander Kmoch @allixender
@allixender.bsky.social
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Associate Professor at Landscape Geoinformatics @lgeoinformatics.bsky.social, University of Tartu #Geoinformatics #geospatial #DGGS #OGC | CEO Geolynx_EE
![module MyGeometry
using Statistics: mean
export distance
export Point
struct Point{T<:Real}
x::T
y::T
end
Base.:+(p::Point{T}, q::Point{T}) where T <: Real = Point{T}(p.x + q.x, p.y + q.y)
Base.:-(p::Point{T}, q::Point{T}) where T <: Real = Point{T}(p.x - q.x, p.y - q.y)
function distance(p::Point{T}, q::Point{T}) where T <: Real
return sqrt((q.x - p.x)^2 + (q.y - p.y)^2)
end
function centroid(points::Vector{Point{T}}) where T <: Real
x = mean([point.x for point in points])
y = mean([point.y for point in points])
Tnew = promote_type(typeof(x), typeof(y))
return Point{Tnew}(x, y)
end
end #module
using .MyGeometry
p = Point(3, 4)
q = Point(0, 0)
@assert distance(p, q) == 5.0
@assert p isa Point{Int}
@assert typeof(p) === Point{Int}
@assert p + q == Point(3, 4)
@assert p - q == Point(3, 4)
@assert MyGeometry.centroid([Point(1, 2), Point(3, 4), Point(5, 6)]) == Point(3.0, 4.0)](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:poiyt6rpetnfvvzan2nnnh2e/bafkreidcynbccpnmzyeprkhri6x3uuyvfo35jyzyswmyd64m2m3hwz3j6i)
