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Subject: Re: Suggestions for Shapes / Add layers in LCX
From: David Raison
Date: Sun, 29 Jun 2003 12:05:34 +0200

On Tue, 17 Jun 2003 22:32:27 +0200, Matthijs van Duin wrote:
While a real effects engine is not likely to happen any time soon, you can already create a moving shape by using a second layer in Add mode on top of the layer that runs the fixed pattern. You can then control the origin of the shape with a cuelist running in that add-layer.

I have now setup and tried this with the 1.08 firmware but I don't quite get what I expected...
For channels defined in both layers the value in the lower layer is added to the value in the upper layer fine. However, I get strange behaviour on channels that are only defined in the upper layer - It seems I can set them only to 0 or 255.

Scenario:
For a test I set up a RoboScan508. This has 5 channels mapped as 43 Lamp control, 44 Colour, 45 Gobo, 46 Pan, 47 Tilt. The following script runs in layer 'BA' at the bottom of the layer stack:

// List 50(5), loaded 6/29/03 10:50 AM
  set engine to chase up loop at 100%
  show d02 for 0.25s, crossfading cr for 0.25s
  show d03 for 0.25s, crossfading cr for 0.25s
  show d04 for 0.25s, crossfading cr for 0.25s
  show d05 for 0.25s, crossfading cr for 0.25s

:d02
   46[128]   47[128]
:d03
   46[128]   47[030]
:d04
   46[030]   47[030]
:d05
   46[030]   47[128]

Now in the next layer (flagged as ADD) I define channel 43 as 11, 44 as 0, 45 as 0, 46 as 129 and 47 as 128. In the DMX monitor I now see 46 and 47 'looping' in time to the 'BA' layer.
Channel 43 shows as 0. In fact for all values between 0 and 127 channel 43 shows 0, values 129 to 255 cause the channel to show 255. There seems to be a fade involved, as you can see the channel to fade from 0 to 255 and vica versa as you cross the boundary. NB A value of 128 will stop the 'fade'. Channels 44 and 45 show a similar behaviour.

Now the question is how to make some channels ADD from below, while defining others as required?


Rgds.
David Raison.
Hampshire, UK
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