  Even though architectural modelling radically evolved over the course of its
history, the current integration of Augmented Reality (AR) and Virtual
Reality(VR) components in the corresponding design tasks is mostly limited to
enhancing visualisation. Little to none of these tools attempt to tackle the
challenge of modelling within immersive environments, that calls for new input
modalities in order to move away from the traditional mouse and keyboard
combination. In fact, relying on 2D devices for 3D manipulations does not seem
to be effective as it does not offer the same degrees of freedom. We therefore
present a solution that brings VR modelling capabilities to Grasshopper, a
popular parametric design tool. Together with its associated proof-of-concept
application, our extension offers a glimpse at new perspectives in that field.
By taking advantage of them,one can edit geometries with real-time feedback on
the generated models, without ever leaving the virtual environment. The
distinctive characteristics of VR applications provide a range of benefits
without obstructing design activities. The designer can indeed experience the
architectural models at full scale from a realistic point-of-view and truly
feels immersed right next to them.
