topic Re: Using Arcade to Iterate Over Polyline Vertices in Attribute Rules Questions

Using Arcade to Iterate Over Polyline Vertices

StefanAngerer — Tue, 14 Feb 2023 10:42:35 GMT

Hey Esri Community!

Hope you're all doing well. I'm working on a project and I'm wondering if any of you know if it's possible to iterate over the vertices of a polyline in Arcade and set the height of each vertex to a specific value, say -0.80?

If you have any tips or resources that could help me out with this, I'd really appreciate it!

Thanks in advance for your help!

Best, Stefan

PS: I know, it would be more convinient to just set the default value of the z-value to the desired height but somehow this is not an option in this project 😉

PPS: This is the code I have come up so far:

if (...)){
var lineGeo = Geometry($feature);
var linePaths = lineGeo.paths;
var newPath = [];

for (var lineSegment in linePaths){
for(var vertex in linePaths[lineSegment]){
var startPoint = linePaths[lineSegment][vertex][0]
var endPoint = linePaths[lineSegment][vertex][1]
var height = -0.80
var newSegment = [startPoint, endPoint, height]
push(newPath, newSegment)
}
}

var newLineGeo = Polyline({
paths: [newPath],
hasZ: true,
spatialReference: lineGeo.spatialReference
});
return newLineGeo
} else {
return Geometry($feature);
}

Re: Using Arcade to Iterate Over Polyline Vertices

JohannesLindner — Tue, 14 Feb 2023 12:15:16 GMT

// return early if your condition is false // this makes the rest of the code more readable var condition = true if(!condition) { return Geometry($feature) } var paths = Geometry($feature).paths var new_paths = [] for(var p in paths) { var path = paths[p] var new_path = [] for(var v in path) { var vertex = path[v] var new_vertex = [vertex.x, vertex.y, -0.8] Push(new_path, new_vertex) } Push(new_paths, new_path) } return Polyline({paths: new_paths, spatialReference: Geometry($feature).spatialReference})

Re: Using Arcade to Iterate Over Polyline Vertices

Bud — Tue, 14 Feb 2023 14:08:54 GMT

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