Re: cant add consumers in macros with published outputs?

Subject: Re: cant add consumers in macros with published outputs?

From: Pierre-Olivier Latour <email@hidden>

Date: Sat, 30 Apr 2005 20:19:18 -0700

Delivered-to: email@hidden

playing with macros it seems that if you have a macro with a published output port you can't
add any "consumers" in that macro? (ie no renderers). It would help to get an error message
when you try and add one instead of the patch just refusing to be added to the composition.

I'm not sure I understand why this is necessary but I'm guessing there is a very good
reason for it :)

If consumers had outputs, they could be connected to other consumers and that can conflict in the evaluation model with their evaluation order e.g. Consumer #1 is set to execute before Consumer #2, but if #1 has an input connected to an output of #2, then it is actually executed first and the whole thing becomes confusing.

this is all well and good but it really reinforces the need for a "debug" patch that prints out
current values to the debug log window. as it is it's really very awkward to try and monitor
values inside a macro with published outputs. you can't add a text renderer into that macro
so you actually have to publish the value you want to debug and render it from the root
patch or another patch further up the tree.

Use a _javascript_ patch and its Log() function e.g. a script like

Log(inputs[0]);

or more complex:

Log("\nSome debug value: a=" + inputs[0] + " & b=" + inputs[1]);

________________________________________________________

Pierre-Olivier Latour email@hidden

Quartz Composer Architect Graphic & Imaging Team

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References:
	>first impressions of QC (From: Roger Bolton <email@hidden>)
	>Re: first impressions of QC (From: Pierre-Olivier Latour <email@hidden>)
	>cant add consumers in macros with published outputs? (From: Roger Bolton <email@hidden>)