anamorphing


    Feb 28 2014 | 1:37 pm
    hi all ,
    i'll try to be clearer than last posts ...
    i'm trying to process some anamorphose of a picture .
    here is a patch , a heavy-CPU-loading one .
    i' m  unable to manage jit.expr (working on it but it's still too early) , gen codes or other GPU clever stuff , enough , to be fast and light .
    so i'm going the bad way , but this is enough for what i want to do .
    it doesn't work good ...
    a picture , on a videoplane , is fullscreened in a jit.window .
    a jit.gl.cornerpin is drawn on it (randomn points) , and the corner coordinates are being processed in order to produce a matrix that will be the "repos" matrix of a jit.repos .
    jit.repos' output is going to the jit.gl.cornerpin , as its texture .
    i should get a flat image , on all the jit.window ,
    but it's not the case ,and i can't figure out why .
    is the process good ( i mean "good") , but the use of the videoplane , not ?
    the process consists of a series of scale boxes , and  2 counters generating each pixel of the "repos matrix" , using these scaled values .
    any ideas why it's not working ?
    .... render is on "ortho 2" , cornerpin is on "cornermode relative" ,i don't know what else to say ...
    sorry for this quite messy patch , i have tried to make it the clearest i could .
    EDIT
    sorry , previous patch had a bug , this one is ok (2 times)
    cheers
    Matthieu

    • Mar 01 2014 | 8:00 pm
      sorry to insist .
      i have read , in the forum , about jit.gl.cornerpin' s distortion .
      would anybody tell me if this is the reason why my problem is happening ?
      if i'm still not clear enough ,
      please tell me , i'll try to explain differently .
      i have just realised that a note , in the patch , is not included ,
      it was saying , at stage 3 "mapping pixels process" :
      "PLEASE , WAIT FOR ~ 10 sec. , AFTER CLICKING THIS BANG" .
      i' m sorry it went away ....
      Matthieu
    • Mar 03 2014 | 4:05 pm
      i have it !
      the distortions i'm getting are only happening between the videoplane (background) and the jit.gl.cornerpin instances.
      as soon as i try to put several jit.gl.cornerpin together ,
      and remove the videoplane from the view ,
      the process is working good , the seams totally match !
      it's been working for approximatively 4 days now ,
      and i couldn' t see it , only looking at the distortion , compared with a videoplane ...
      so , that's a good start .
      i would now need to write a jit.expr formula ,in order to replace my so slow (but working) subpatch , that goes to the jit.repos right inlet .
      maybe , the best would even be a jit.gen code ...
      ...
      ...
      cheers !
      Matthieu