Coordinate system in Jolt for ConvexHull

[djmittens]

I tried to load a point cloud into jolt, based on openGLs coordinate system for a simple prism, and it seems to be oriented upside down. Is the coordinate system different than the one used with opengl? Positions and rotations in the game world seem to match but for some reason the points, for the convex hull itself are upside down.

This is how i load the prism

    case PhysicsVolume::Type::GEOMETRY:
      // Gonna load the point cloud here
      const std::vector<Vertex> &vtx =
          assets->getMesh(rbc.volume.geometry.asset).m_vertices;

      JPH::Array<JPH::Vec3> points{};
      points.resize(vtx.size());
      for (int i = 0; i < vtx.size(); ++i) {
        points[i] = (JPH::Vec3(vtx[i].m_position.x, vtx[i].m_position.y,
                               vtx[i].m_position.z));
      }

      JPH::ConvexHullShapeSettings settings(points);

      JPH::Ref<JPH::Shape> shape = settings.Create().Get();
      JPH::RVec3 scale(tfmc.scale.x, tfmc.scale.y, tfmc.scale.z);
      JPH::BodyCreationSettings bsettings;
      if (shape->IsValidScale(scale)) {
        bsettings = {
            JPH::ScaledShapeSettings(shape, JPH::RVec3Arg(scale))
                .Create()
                .Get(),
            JPH::RVec3(tfmc.position.x, tfmc.position.y, tfmc.position.z),
            JPH::Quat(tfmc.rotation.w, tfmc.rotation.x, tfmc.rotation.y,
                      tfmc.rotation.z),
            motiontype, layer};
      } else {
        bsettings = {
            shape,
            JPH::RVec3(tfmc.position.x, tfmc.position.y, tfmc.position.z),
            JPH::Quat(tfmc.rotation.w, tfmc.rotation.x, tfmc.rotation.y,
                      tfmc.rotation.z),
            motiontype, layer};
      }

      JPH::BodyID id = body_interface.CreateAndAddBody(bsettings, activation);
      entityToBody[eid] = id;
      break;
    }

this is what the mesh data for the prism looks like:

Mesh newPrism(const AssetID material) {

  Mesh model{{
                 {{.5, -.5, .5}},
                 {{-.5, -.5, .5}},
                 {{-.5, -.5, -.5}},
                 {{.5, -.5, -.5}},
                 {{-.5, .5, -.5}},
                 {{.5, .5, -.5}},
             },
             {4, 1, 5, 5, 0, 1, 1, 2, 0, 0, 2, 3, 3, 5, 0, 1, 4, 2},
             material};

  model.calculateNormals();
  return model;
}

and this is what it looks like in the game, as you can see its more of a ledge than a ramp:

[djmittens]

well this is embarrassing, after this whole write up i realized that the w component for jolt is in different place than glm... 😅 so i guess that answers my question