Getting Material in Video Post ExecutePixel

Helper

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 24/03/2010 at 04:50, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   11.5
Platform:   Windows ;
Language(s) :     C++ ;

---------
I want to find the name of a material a pixel is being rendered in from a Video Post plugin. I have got code that works in some cases, but if there are different materials applied to selected faces of a cube I can't see how to get the right material.

Here's what I'm doing

if (pp->frag[0]->id.Content())
{
    RayObject *obj=pp->frag[0]->id.GetObject(pp->vd);
    if (obj->texcnt)
    {
        GeListNode* mp=pp->vd->GetTexData(obj, 0)->mp;
        if (mp && mp->IsInstanceOf(Tbaselist2d))
        {
            BaseList2D *bmp=static_cast<BaseList2D*>(mp);
            name=bmp->GetName();

but in the example I'm currently working on, obj->texcnt is 3 and the names I actually want are those from GetTexData(obj, 0), GetTexData(obj, 1) and GetTexData(obj, 2). Unfortunately I can't see any way to work out which index I need for a given pixel!

I can get polygon index numbers, which are different on the 3 faces I can see, but can't see any way to map them to textures.

Thanks,

Arvan

Helper

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 24/03/2010 at 06:59, xxxxxxxx wrote:

You can access the current texture through BaseVolumeData::tex.

Have a look at the example below.

  
void VisualizePostData::ExecutePixel(PluginVideoPost *node, PixelPost *pp, LONG x, LONG subx, LONG suby)  
{  
  if (pp->vd)  
  {  
      TexData *tex = NULL;  
      tex = pp->vd->tex; //the texture data of the current pixel  
  
      if (tex)  
      {  
          //render red if a texture has been found, just as example  
          pp->col[0] = 1.0;  
          pp->col[1] = 0.0;  
          pp->col[2] = 0.0;  
      }  
  }  
}

cheers,
Matthias