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Model-driven software product lines combine the abstraction capability of Model Driven Software Development (MDSD) and the variability management capability of Software Product Line Engineering (SPLE). This short contribution motivates the idea of model-driven software product lines and briefly explains the concepts underlying feature-based model templates, which is a particular technique for modeling software product lines.

We introduce and formally evaluate smartcasting: a smartphone-based Ray Casting implementation for 3D environments presented on large, public, autostereoscopic displays. By utilizing a smartphone as an input device, smartcasting enables "walk up and use" interaction with large displays, without the need for expensive tracking systems or specialized pointing devices. Through an empirical validation we show that the performance and precision of smartcasting is comparable to a Wiimotebased raycasting implementation, without requiring specialized hardware or high-precision cameras to enable user interaction.