clipka <ano### [at] anonymousorg> wrote:
> If you need to apply the inverse transform, you can also use:
>
> #declare MyInvTransform = transform { MyTransform inverse }

Hi,
this was the keyword :-)
Now it is working!

In the past I've experimented with vtransform, vinv_transform and some other
functions, but got no working code. The transform with the 'inverse' keyword was
working immediately.

Now I could reduce the parsing time from 57 to 33 seconds.

Thanks a lot to all!





------------
for intrests, here is the code doing the back-traansformation:

fAnimCnt,arAnimTrans and arAnimVek are initialisized by revious function calls.
fAnimCnt stores the number of transforms in the arrays.
arAnimTrans[] is the type of transformation, 1=translate, 2=rotate
arAnimVek[] stores the vector values of the transform
arVertics is an array with the vertics of the mesh (not in vetor format -
array[Num][3] to be compatible with my older macros)

    // build the transform-statement
    #local i=0;
    #local vtrans = transform {
      #while (i<fAnimCnt)
        #if (arAnimTrans[i]=1) // translate
          translate arAnimVek[i]
        #else
          rotate arAnimVek[i] // rotate
        #end
        #local i=i+1;
      #end
    }
    // the inverse transformation
    #local itrans=transform{vtrans inverse};

    // applying the transform to all vertics
    #local Size=dimension_size(arVertics,1);
    #local i=0;
    #while (i<Size)
      #local V=<arVertics[i][0],arVertics[i][1],arVertics[i][2]>;
      #local V=vtransform(V,itrans);
      #declare arVertics[i][0]=V.x;
      #declare arVertics[i][1]=V.y;
      #declare arVertics[i][2]=V.z;
      #local i=i+1;
    #end

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