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How to calculate the farthest point within a piece?
Fda
Member Posts: 40 ✭✭
I would like to know if there is some kind of Feature Scripti capable of searching the furthest path of a flow of plastic material injected into a part.
(I hope I have explained myself well )
(I hope I have explained myself well )
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Best Answers

ilya_baran Onshape Employees, Developers, HDM Posts: 1,015I think the picture is clear  mathematically, given a point S, for every point E on the surface, you want to take the shortest path from S to E within the volume and then get the length of the longest of these paths.
This is not a simple computation to do  we certainly don't have anything that'll compute it exactly. Off the top of my head, I don't have great approximate suggestions either. I think you need specialized software for this.Ilya Baran \ Director, Architecture and FeatureScript \ Onshape Inc1 
romeograham Member Posts: 535 PRO...yep  a Moldflow analysis partner to work directly with Onshape documents!2

Fda Member Posts: 40 ✭✭ilya_baran dijo:Creo que la imagen es clara: matemáticamente, dado un punto S, para cada punto E en la superficie, desea tomar el camino más corto de S a E dentro del volumen y luego obtener la longitud del más largo de estos caminos.
Este no es un cálculo simple, ciertamente no tenemos nada que lo calcule exactamente. En la parte superior de mi cabeza, tampoco tengo grandes sugerencias aproximadas. Creo que necesitas un software especializado para esto. I am aware that a "Moldflow" type software would be the most suitable solution.
 Onshape has features that are helpful to calculate quickly:
 The area selected in "mold dividing line"(part + channels + spuere bushing) The volume of the piece. Material's list.> ABS (1.052e6)> HDPE [HighDensity Polyethylene] (9.410e7)> Polypropylene (9.130e7)> etc ..
 Draft analysis. I don't know when I saw a feature capable of evaluating the farthest point
 I thought that with some kind of "Query", "evVertexPoint" could do something like this.
Compared values to count the furthest.
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ilya_baran Onshape Employees, Developers, HDM Posts: 1,015evDistance can calculate the farthest point in a body from a given one, but it uses Euclidean distance, whereas you need shortestpath distance within the volume. evVertexPoint just gives to the coordinates of a vertex.
Thinking a little more, if I had to approximate this, I'd probably sample a bunch of points on the surface and interior, connect every pair of points if the line segment between them is contained in the interior of the solid, and then use Dijkstra's algorithm on the resulting graph.Ilya Baran \ Director, Architecture and FeatureScript \ Onshape Inc1
Answers
This is not a simple computation to do  we certainly don't have anything that'll compute it exactly. Off the top of my head, I don't have great approximate suggestions either. I think you need specialized software for this.
 Draft analysis.
Thinking a little more, if I had to approximate this, I'd probably sample a bunch of points on the surface and interior, connect every pair of points if the line segment between them is contained in the interior of the solid, and then use Dijkstra's algorithm on the resulting graph.