How to obtain the indices of a PxTriangleMesh?

[hazidh]

Hello,I create a PxTriangleMeshGeometry,then I want to get its mesh indices.What should I do?I see that the function of PxTriangleMesh.getTriangles returns NativeObjects which not PxArray_PxU32 or PxArray_PxU16.I would appreciate your reply

[fabmax]

Getting back the triangle data from the mesh is not yet supported. I would recommend to keep and use the data that you used to construct the PxTriangleMeshGeometry.

[hazidh]

Getting back the triangle data from the mesh is not yet supported. I would recommend to keep and use the data that you used to construct the PxTriangleMeshGeometry.

Hello,because my scene needs to obtain the indices of a PxTriangleMesh to build Mesh with another 3D engine.If so, what should I do to get the indices of a PxTriangleMesh?

[fabmax]

To create a PxTriangleMeshGeometry you first create a PxTriangleMeshDesc where you put in your triangle data, the points and the indices. There you have your indices just use them. If you don't create a PxTriangleMeshDesc with that data you won't get a valid PxTriangleMesh / PxTriangleMeshGeometry in the first place.

[hazidh]

Yes,this is a methoed.I also can get the indices by this way. short[] index = new short[nbTriangles * 3]; NativeObject triangles1 = triangleMesh.getTriangles(); PxU16Ptr ptr = NativeArrayHelpers.voidToU16Ptr(triangles1); for (int i = 0; i < nbTriangles; i++) { index[i * 3] = NativeArrayHelpers.getU16At(ptr, i * 3); index[i * 3 + 1] = NativeArrayHelpers.getU16At(ptr, i * 3 + 1); index[i * 3 + 2] = NativeArrayHelpers.getU16At(ptr, i * 3 + 2); } Now I want to create a CovexMesh through this way,what should I do?I can't create it. `PxConvexMeshDesc convexDesc; convexDesc.points.count = 12; convexDesc.points.stride = sizeof(PxVec3); convexDesc.points.data = convexVerts; convexDescPolygons.polygons.count = 20; convexDescPolygons.polygons.stride = sizeof(PxHullPolygon); convexDescPolygons.polygons.data = hullPolygons; convexDesc.flags = 0;

PxDefaultMemoryOutputStream buf; if(!PxCookConvexMesh(cookingParams, convexDesc, buf)) return NULL;`

[fabmax]

PxConvexMesh works pretty similar to triangle mesh. The code you pasted seems to be C++ though...

Here is how I do it in my engine (it's kotlin, but it uses the Java lib and it should work exactly the same in Java).

Any by the way you can insert multi-line code snippets by using three backticks before and after the code snippet instead of a single one.