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Polygon generation problems

Hello, I think I found a problem with the polygon generation algorithm. When using a specific set of coordinates I get a polygon with only 2 sides (in my code).

I adapted the iOS example with my own values to get a visualization for the problem at it is quite strange. Without filling in the polygons everything looks alright, but when turning on polygon fill you can clearly see that something is not right.

I modified the iOS example like this:

private func makeSites(forViewSize size: CGSize) {
        let numberOfSites = 30
        
        Random.setGlobalSeed(pointsSeed)
        
        var coords: [Double] = [467.14, 115.11, 467.14, 160.03, 467.14, 204.94, 467.14, 249.86, 467.14, 294.78, 467.14, 339.7, 496.64, 115.11, 496.64, 160.03, 496.64, 204.94, 496.64, 249.86, 496.64, 294.78, 496.64, 339.7, 526.14, 115.11, 526.14, 160.03, 526.14, 204.94, 526.14, 249.86, 526.14, 294.78, 526.14, 339.7, 674.12, 160.03, 555.64, 204.94, 555.64, 249.86, 555.64, 294.78, 555.64, 339.7, 585.14, 115.11, 585.14, 160.03, 585.14, 204.94, 585.14, 249.86, 585.14, 294.78, 585.14, 339.7, 614.64, 115.11, 614.64, 160.03, 614.64, 204.94, 614.64, 249.86, 614.64, 294.78, 614.64, 339.7, 644.14, 160.03, 644.14, 204.94, 644.14, 249.86, 644.14, 294.78, 644.14, 339.7, 673.64, 204.94, 673.64, 249.86, 673.64, 294.78, 673.64, 339.7, 703.14, 294.78, 703.14, 339.7]
        
        sitePoints = []
        
        var i: Int = 0
        
        while(i < coords.count) {
            let point = SIMD2<Double>(x: coords[i], y: coords[i+1])
            let color = randomColor()
            sitePoints.append(SitePoint(point: point, userData: color))
            
            i = i + 2
        }
        /*for _ in 0..<numberOfSites {
            let point = randomPointInArea(withSize: size)
            let color = randomColor()
            sitePoints.append(SitePoint(point: point, userData: color))
        }*/
    }