public Matrix4f toTransformMatrix(Matrix4f store) {
        if (store == null) {
            store = new Matrix4f();
        }
        store.setTranslation(translation);
        rot.toTransformMatrix(store);
        store.setScale(scale);
        return store;
    }
Converts to an equivalent transform matrix. The current instance is
unaffected.

@param store storage for the result (modified if not null)
@return a transform matrix (either <code>store</code> or a new Matrix4f)
jme3-core/src/main/java/com/jme3/math/Transform.java