hi , i been thinking on this one for a while,
the idea is to use a cam to object track someone on stage and use this to control a moving head spotlight.
can any one give me any pointers, i think i can handle the object track bit to give me X & Y the Z will be a set value of the persons hight. i can do the dmx out bit.
I just need help with all the messy maths bit in the middle that will turn the XYZ of the target in to Pan/Tilt and possible iris to send on to the moving light.
We did something very similar with some Mac250's about a year ago using a bunch of sine's and cosine's back in Max/MSP
However, at that time i didn't know about vvvv and it's'polar' node.
The polar node will convert between your xyz and pan/tilt angles.
Thankfully the pan/tilt angles are linearly related to the dmx signal so you dont have to do any mad calculations to sort that out. It was simply a case of:
DMX value = current angle / total angle range
If you've got any queries then post them up/pm me
cheers for all of the help so far.
ive attached a tweaked version of west's sunonfloor
how can i tweek it so i can use real world units eg floor 10m x 10m , mirror 2 m forward of center at 5 m high ect ........
also how can i tweek the second render to give a pov of the mirror.
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