hi,

in megapov 0.7, are the color channels FILTER and TRANSM correct in post
process functions ?

i m trying to write my simple post process, background_pigment, and i d like
to use either the filter channel either the transm channel.. So i first try
to replace pixel with a non zero filter channel with my pigment (see code),
but it doesn t seem to work fine, i just get one line where it s ok (i don t
know why just this line in the middle of my example..) . In atmosph.c i've
also commented out two lines in Do_Infinite_Atmosphere (colour[filter]=0..)
but it changes nothing. After this, i ve tried with the transm component,
but it only works in the background and only if +UA is set :(

here is the code for the post process and a pov example in case someone can
see my mistake.. thanks



void doPostBackgroundPigment(PP_TASK *pp_task, COLOUR **in, COLOUR **out,
PP_DATA_LISTS data, int height, int width)
{
  int x,y;
  PP_BACKGROUND_PIGMENT * Task;

  COLOUR Weight;
  VECTOR Loc;

  Task = (PP_BACKGROUND_PIGMENT *)pp_task;

  PP_STATUS_BEGIN("background_pigment")
  for(y=0; y<height; y++)
  {
    PP_STATUS_PROGRESS("background_pigment")
    COOPERATE_1
    for(x=0; x<width; x++)
    {
      if (in[y][x][3])
      {
        Loc[0] = (DBL)x/width;
        Loc[1] = (DBL)y/height;
        Loc[2] = 0;
        Compute_Pigment (Weight, Task->Pig, Loc, NULL);
        out[y][x][0]=Weight[0];
        out[y][x][1]=Weight[1];
        out[y][x][2]=Weight[2];
        out[y][x][3]=in[y][x][3];
        out[y][x][4]=in[y][x][4];
      }
      else
      {
        out[y][x][0]=in[y][x][0];
        out[y][x][1]=in[y][x][1];
        out[y][x][2]=in[y][x][2];
        out[y][x][3]=in[y][x][3];
        out[y][x][4]=in[y][x][4];
      }
    }
  }
  PP_STATUS_END
}


#version unofficial MegaPov 0.7;

global_settings
{
 ini_option "+A +UA"
 post_process { background_pigment { checker color rgb 1 color rgb 0 scale
.1} }
}

background { color rgbft<0,0,0,1,1> }

camera { location <1,1, -6> look_at <0, 1, 0> }

plane { y, 0 pigment { color rgb <.9,.3,.7>}}
sphere { <1,1,0>, 1 pigment { color rgbft <.4,.5,.7,.4,0> }}
sphere { <-2,2,.4> , 1 pigment { color rgbft <.3,.5,.5,.2,0> }}
light_source { <10, 10, -10>, color rgb 1 }

Post a reply to this message