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« Last post by James on May 02, 2022, 11:40:40 am »
Hi Banglabastler!
The I channel corresponds to the 6th channel of the sound device. So the order is:
1 X
2 Y
3 r
4 g
5 b
6 i
If you have a laser projector that only has one color, you can make wave files in LaserBoy that have a mix of the rgb signals in the 6th channel. Then you drive your laser modulation input with the i signal. If you hooked it up to one of the other color channels, then it would only come on when that color is in the art. There are a few different signals you can put in the i channel and there are settings in LaserBoy to choose. It's also possible to put Z in the i channel if you have 3D vector data. This might be useful if you have some kind of analog signal processing that can deal with 3D input signals.
A capacitor blocks DC in an audio-like signal. This is fine for audio because DC could actually damage a speaker. But for vector position signals, this is no good. Putting a signal through a capacitor is the math equivalent of the first derivative of a function. So instead of the absolute voltage over time, you get the change in voltage over time. Let's say you want to display a single dot above and to the right of the center of the screen (in the all positive area with respect to the origin 0,0). If you want to hold that dot there for a few seconds you will have X and Y signals that start at zero and jump to some positive voltage and stay at that constant voltage for however long you want to display the dot. A constant voltage has no change over time! So a DC blocking capacitor would start to discharge as soon as the dot appeared and the dot would drift back to the center of the screen. This is also required for color signals because they are nothing but positive voltages.
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But now I get an error saying that libboost_filesystem is incompatible: