Technical setup The setup for the presentation makes use of three personal computers, 2 W.A.R.T.O.s (Wooden Assembly Rope Technology Object), a microphone and a digital camera. The computer running the presentation (which makes use of Alice, a fast prototyping for 3D virtual worlds--for more information, go to http://www.alice.org), is the central computer which receives all the pertinent information from the two other computers. The central computer is a PIII 800 Mhz computer which has 5 Voodoo 3D video cards, in addition to the primary video card, that are attached to the projectors in the Earth Theater.
The W.A.R.T.O.	The sound and rope machine has a microphone attached to it in order to monitor the volume of the audience's responses to the screen. Attached to this machine also is the W.A.R.T.O. which is actually a coil of thick rope with an optic mouse, to act as the input device to the computer, placed on top of each W.A.R.T.O. device. The optic mouse tracks the movement of the coil of rope whenever the rope is pulled and sends this data to the sound and rope machine. The sound and rope machine will then communicate all these information to the central computer via TCP/IP. The digital camera is connected to the video machine which keeps track of the audience's movement and sends this information to the central computer via TCP/IP also. To keep track of the audience movement, the machine uses a code that takes a picture of the audience at a certain instance and then compare it to pictures of the audience when the audience were at different locations. Basically, the code makes use of a reference to keep track of the audience. This is the reason why, at a certain instance of the story, the audience is asked to move left and right so that the camera can take pictures
of the audience at different locations and then use these pictures as reference for later on. Relationship to interaction activities: "Aarrgggh" Lesson: This makes use only of the microphone and sound & rope machine to determine the volume of the audience's "Aarrgh" Port and Starboard Lesson: The digital camera is used to take pictures of the audience when the audience are at different locations Raising the Mast: The W.A.R.T.O.s are used in conjunction with the sound & rope machine to determine how much rope has been pulled by the audience members Firing the Cannon: The digital camera is used to keep track of the audience and use this information as the basis for moving the cannon at the right position. The microphone is also used to measure the volume of the audience's shout at the right moments.