transform = (matrix, geometry) => {
  const transforms = mat4.multiply(mat4.create(), matrix, geometry.transforms)
  return Object.assign({}, geometry, { transforms })
}
Transform the given geometry using the given matrix.
This is a lazy transform of the polygons, as this function only adjusts the transforms.
See applyTransforms() for the actual application of the transforms to the polygons.
@param {mat4} matrix - the matrix to transform with
@param {geom3} geometry - the geometry to transform
@returns {geom3} a new geometry
@alias module:modeling/geometries/geom3.transform

@example
let newgeometry = transform(fromXRotation(degToRad(90)), geometry)