A variety of brick shapes	Yellow brick collides with purple brick
Yellow brick snaps to potential join position	Both bricks joined

This project is an investigation into techniques for interactive 3D model building. It uses the Maverik VR system developed at the University of Manchester. The system currently uses a standard keyboard and mouse combination for interaction; two-handed manipulation with 3D mice is a future possibility.
 

Features implemented:

• Lego brick primitves.  Brick geometry is modelled using AC3D. Each brick has associated auxilliary data which describes the connectivity layout on its upper and lower surfaces.

 
• User navigation. The mouse may be used to position the viewer arbitrarily within the scene.

 
• Brick selection. Bricks may be selected and moved with the mouse. Brick rotation is achieved using the keyboard.

 
• Collision detection. Bricks cannot mutually intersect, and slide over each other if this is attempted.

 
• Snap-to-grid connection. Bricks snap into correct connection configurations when placed together.

 
• Connection hierarchy. The connected state of joined model sub-parts is recorded within the application.

 
• Sound feedback. Sound samples provide audio cues when objects collide or are joined.