Image Generator

• Origin is center of floor, 30cm below mid-point of base circle of screen
• DirectX left-handed camera-like coordinate system +X = right, +Y= up, +Z front
• Unit inches

Model

• Custom model
• Unit Meter
• Origin is mid-point of base circle of cylinder
• R=4m h=3m
• Axes: +X=right, +Y=forward, +Z=up (right handed)

Others:

• Tracker is calibrated to model origin, so it yields model coordinates
• Stereoscopic 3D

The base matrix must be scaled down to inches 1”=0.0254m. Also, the axes are rotated: Y is same but model Y is IGs Z and Z is Y. This also flips the handedness. The origin 30cm lower.

base=[0.0254,0,0,0;0, 0, 0.0254,0;0, 0.0254,0,0;0,0,-0.3,1]

The tracker yields the actual head position and direction in inches. We must add the eye-offset to left and right eye this is in IG coordinates so we need to shift 1.25” to each side. We set eye-vector to:

[channel1L]
eye=[-1.25,0,0]
[channel1R]
eye=[1.25,0,0]

bTurnWithView=0 ; to keep the world fixed to the walls of the screen instead to the viewers eye.