shader for cropping
not sure if this is useful to anyone else..I modified the edgewipe shader so that the edgefade can be adjusted and used as a hard or soft edge 4 side crop instead..the individual edge softness can be adjusted with the parameter 'edgefade' but just .0001 goes a long way, so be gentle
now someone needs to make an easy 4 corner pin shader (please??..for running multiple inputs at once) and we'll be in business for crazy projections
thanks..i guess the mesh thing works well enough..I'll have to give it a try sometime soon, although a shader would be a little more compact..is there an advantage to the matrix-> mesh method?..here is a help patch for my cropper ..not sure why it wasnt working for you:
and the shader code for good measure:
generates gradient alpha for edge-blending
hard edge
amount of gradient
ha yes thx.
i didn't understant i had to put at least 0.0001 edgefade.
why ? :-)
> is there an advantage to the matrix-> mesh method?
i don't know.
i would like to crop before to use this keystone. for now i can't find
how to.
if i use a shader like you did, the dimension stays as original movie.
so it doesn't work like i want.
>
--
fabrice planquette
elt@altern.org
--
by the way. how do you do to insert your shader in my keystone's patch ?
did you try ?
it doesn't work here.
i can't make my shader work in your keystone patch either..i just started using gl stuff a week ago so I'm sure there is something im missing..its probably something weird with the way gl.mesh is mixing things together, perhaps throwing away the alpha channel, but im not sure
I'm trying to find a good keystone patch. The patch above is not a real keystoner. It creates a polygon with 2 triangles, so you end up with this nasty crookedness across the diagonal.
I tried both of hcblije's max-built programs, but they are very unreliable under windows on most systems.
I just can't find something good on the forums. Can anyone help?
Thanks
four corner pin patch.
Thanks so much for this. It was a life saver. I meant to reply several months back.
If it helps anyone else, I have created a more full-featured implementation, with 3+ different keystone windows, interactive pin movement for each, easy to extend (I hope), instructions for use, etc.
Oh yeah, just remember to save/re-load after you paste; or else activate all the "loadbang"s and "loadmess"es.
thx but abstractions are missing.
mpCornerUI + mpCornersMesh
Whoops. I'm new to posting patches. Here are the 2 sub-patchers:
1) mpCornerUI:
2) mpCornersMesh: