@Override
    public void read(JmeImporter im) throws IOException {
        super.read(im);
        InputCapsule in = im.getCapsule(this);

        start = (Vector3f) in.readSavable("startVertex", start);
        end = (Vector3f) in.readSavable("endVertex", end);
    }
Alter the start and end.

@param start the desired mesh location of the start (not null,
unaffected)
@param end the desired mesh location of the end (not null, unaffected)
jme3-core/src/main/java/com/jme3/scene/shape/Line.java