ExtrudePolygon depth in --Y Direnction?

Questions
1

BABYLON.MeshBuilder.ExtrudePolygon, give a positive depth but extrude along negative y axis direction, this is counterintuitive!

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2

Welcome @11123 !!!

This is really hard to tell without a repro in the playground ?

3

You are correct - extrudePolygon uses an earlier method polygonMeshBuilder which also does this.

https://playground.babylonjs.com/#PTTMVI#315

https://playground.babylonjs.com/#4G18GY#267

It is not possible to change this because of backward compatibility.

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4

Thanks for your guide, Babylonjs is a excellent 3d library, it seem aim to game dev. but my work is construct some house model in a simple way, so I need to operate the mesh data.

5

This is certainly possible and there are a number of examples of projects like this on https://www.babylonjs.com/, scroll down and click the more link.

Here is the start of one way https://doc.babylonjs.com/snippets/house_use.

There are many ways to do this from https://doc.babylonjs.com/features/position,_rotation,_scaling to https://doc.babylonjs.com/how_to/custom

All the best for your project.