mesh.getHeightAtCoordinates(x, z) return 0 except that at these coordinates it is not 0

Questions
1

Hi, I’m working on a project where I’d like a mesh to be laid on a ground depending on the coordinates given. So far so good. But when I go over a ground that has been modified with a function that lets you change the vertices to create either a difference in level or a hole (made using this doc: Babylon.js docs )

and well the modifications made are not taken into account in spite of a ‘mesh.computeWorldMatrix(true)’ and the mesh posed remains in y=0…

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image1661×599 83.3 KB

to lay a mesh I use this function

    getPositionInSphere(sphereRadius, pos_middle_sphere) {
        var y = (Math.random() - 0.5) * 2 * sphereRadius;
        
        var radiusAtY = Math.sqrt(Math.pow(sphereRadius, 2) - Math.pow(y, 2));
  
        var theta = Math.random() * 2 * Math.PI;
    
        var x = (radiusAtY * Math.cos(theta))+pos_middle_sphere[0];
        var z = (radiusAtY * Math.sin(theta))+pos_middle_sphere[2];
        var y = this.meshSupport.getHeightAtCoordinates(x, z);            
        
        return new BABYLON.Vector3(x, y, z);
    }

EDIT:
to modify the ground I use the doc and I also modify the normals so that I can use it to orientate the mesh so that it is against the ground and not floating

2

Are you able to setup a repro in the Playground? Else it will be hard to help.

Do you call GroundMesh.updateCoordinateHeights to make sure the internal representation of the height field is updated with your changes?

3

hello more needs i just found the error while doing some tests!!! i had put the line ‘mesh.convertToFlatShadedMesh()’ which broke everything. problem solved!

I didn’t put the line you said, but I think adding it won’t do any harm?

4

If it works without it, then you don’t need to add it.

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