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How is "Trails" implemented

Posted: Mon Dec 02, 2019 13:51
by sefreso

I would like to port Resolume's "Trails" video effect into a GLSL plugin.

I have been looking online for tutorials but can't find the right search keywords.

I don't really know where to start.

Would anyone outline the main steps in producing the Trails video effect?


Re: How is "Trails" implemented

Posted: Mon Dec 02, 2019 15:07
by edwin
You need to retain a copy of the last rendered frame.
So keep a copy and perform a blend with the new Frame.

Re: How is "Trails" implemented

Posted: Tue Jul 14, 2020 13:45
by Piotrus04
@Edwin, do you have a source to provide because it is not only get a copy of rendered, we also have to manage the double call to the same instance, when the clip play and preview mode are both activated.
In this case, the plugin must manage two different dimensions, the one from the layer or clip sent to preview, and the one sent to the output.
Double means two fbos of different dimensions?
How to manage this?