Position |
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Position |
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Position |
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Position |
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The Position parameters allow changing the position from where the light rays are emitted originally in the 3D space. Just as a camera a light's default position is located at (XYZ = 0,0,-25).
The reason for the units of the position parameter lies in the following: one screen width is always 16 units wide, the height is calculated by the aspect ratio. A 4:3 display is 16 units wide and 12 units high, a 16:9 display is 16 units wide and 9 units high.
Lights in Pandoras Box have no attenuation, which means that their intensity is not a function of the distance from a light source to an object's surface. Thus, the position does only affect the angle of incidence, i.e. how steep the light shines on an object. The second parameter influencing the angle is the target position. The affect of the angle of incidence is described here in detail.
DMX Control
All position channels are 16bit and the default value is 32768.
Resolution: 1 DMX Step = 0.008 units
X Position:
0 |
max. position left (-256 units or 16 screen width to the left) |
32768 |
Center |
65535 |
max. position right (+256 units or 16 screen width to the right) |
Y Position:
0 |
max. position bottom (-256 units) |
32768 |
Center |
65535 |
max. position top (+256 units) |
Z Position:
0 |
max. position far (-256 units) |
32768 |
Center |
65535 |
max. position near (+256 units) |