| Hello George,
I don't know the answer, how to make a global variable in CI Kernels. But I would pass "time" through all functions. I did this with your code, and it worked:
|
road to ribbon - Core Image (Achim).qtz
Description: application/quartzcomposer
Achim Breidenbach Boinx Software Ltd.
PS: Its always amazes me, which wonderful images can be produced by so less code. On 11.11.2012, at 03:32, George Toledo wrote: Here's the composition that brought this to mind - I'd been curious about raytracing with a core image kernel for awhile. It's always such a pain because of embargoes on the language, and unsupported statements. It does basically work though (of course).
This is a translation of the demoscene "Road To Ribbon".
It works fine at time 0~1ish, until the ribbon goes offscreen. The glsl shader is able to receive the time value for the function that draws the ribbon, to keep it offsetting as the world offsets.
-gt On Sat, Nov 10, 2012 at 8:07 PM, George Toledo <gtole...@gmail.com> wrote:
I wish to pass a time value to a function that isn't in the main cikernel.
How does one access a variable from the ci kernel - declared in the kernel so as to make an input port - in a function before the actual kernel?
Alternately, is there any other way to pass info from an input port to a function (not the main kernel)?
Thanks,
George Toledo
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