need Surface GetParamAtPoint and GetPointAtParam Advice?

[Fleuve]

The problem begin with recreating a surface with cylinder inside an Edge loop boundary.

If you remark, this edge loop have not proper start to respect a sweeping philosophy (min to max) and this edge loop was not really symetric (we have 2 missing point on other side of edge)... To correct the problem I've decide to rebuild params array with only one parameter (U) and re-ordered it (in unique data array)... When I Apply GetParamAtPoint, I get that... (everything working fine at this point).

Now I try to reverse function to reach each bottom of each U Parameter (SORTED UNIQUE U VALUE)... I push any value of E1, A1, D1 and i'm still get B point in anyway.

        CComPtr<SurfaceEvaluator> pSurfEval;
        Face->get_Evaluator(&pSurfEval);
       

        CComSafeArray<double> *GuessParams =  new CComSafeArray<double>;
        CComSafeArray<double> *MaxDeviations =  new CComSafeArray<double>;
        CComSafeArray<double> *Params =  new CComSafeArray<double>;
        CComSafeArray<double> *SolutionNatures =  new CComSafeArray<double>;
        CComSafeArray<double> *Point =  new CComSafeArray<double>;
        
        for (long i = 0; i < CurveLoop->GetNbLoop(); i++)
        {
            for (long j = 0; j < CurveLoop->GetNbPointAtLoop(i); j++)
            {
                CRDVertex* SPoint = CurveLoop->GetPoint(CurveLoop->GetPointAtLoop(i, j));
                
                Point->Add(SPoint->x);
                Point->Add(SPoint->y);
                Point->Add(SPoint->z);
                

                //This Part Working Well
                pSurfEval->GetParamAtPoint(Point->GetSafeArrayPtr(), (*GuessParams).GetSafeArrayPtr(), (*MaxDeviations).GetSafeArrayPtr(), (*Params).GetSafeArrayPtr(), (*SolutionNatures).GetSafeArrayPtr());
                wprintf_s(L"Point (%lf, %lf, %lf) @ UV LIST (%lf, %lf)\n", (*Point)[0], (*Point)[1], (*Point)[2], (*Params)[1], (*Params)[0]);
               
                GuessParams->Destroy();
                MaxDeviations->Destroy();
                Params->Destroy();
                SolutionNatures->Destroy();
                Point->Destroy();
            }
        }

        Params->Add(-3.1416);
        Params->Add(2.0);
            
        pSurfEval->GetPointAtParam(Params->GetSafeArrayPtr(), (*Point).GetSafeArrayPtr());
        wprintf_s(L"Test %lf, %lf, %lf\n", (*Point)[0], (*Point)[1], (*Point)[2]);

         FOR EACH U

             create line (U, V min) - (U, V max)

              FOR EACH segement in EdgeLoop

                   Detect Intersection

                   if Intersection Detect add in array

Q. Why I still have always the same TEST point?

Q. If I enter outer value like (E1) does E gonna be on surface or out surface?

Q. I will create virtual line thru V cylinder limit and put in a unique vlaue vector to retreive peer-point. Does SDK have "two line intersection" function or have you an idea to reach V limit (min max) for a U Value. Because when i'm gonna rebuild U Array I'm not know V value for missing point.

     FOR EACH U

          create line (U, V min) - (U, V max)

          FOR EACH segement in EdgeLoop

                Detect Intersection

                if Intersection Detect add in array

Thanks....

[Fleuve · Accepted solution]

I found It!!! At Once I found time to fix it! Let's me explain

1. The problem come with CComSafeArray<double>

2. Combined with a loop.

3. At begin I use Param like input and Point like output. After I reverse, I use Point like input and Param like output and every data become STUCK because some function like GetParamAtPoint and GetPointAtParam renew the output pointer inside the function.... To avoid this probleme, you must re-new input variable (CComSafeArray<double>) before readd data OR another solution that I've think is use Non-Pointer variable for input and Pointer variable for output... Like this you can destroy without renew variable.

4. Unfortunately we don't have CleanArray function and we must use Destroy to clean it.

Corrected Code

CComSafeArray<double> *GuessParams =  new CComSafeArray<double>;
CComSafeArray<double> *MaxDeviations =  new CComSafeArray<double>;
CComSafeArray<double> *SolutionNatures =  new CComSafeArray<double>;
CComSafeArray<double> *OutputParam =  new CComSafeArray<double>;              // Pointer Variable
CComSafeArray<double> InputParams;                                                                      // Non Pointer-Variable
        
for (long i = 0; i < CurveLoop->GetNbLoop(); i++)
{
   for (long j = 0; j < CurveLoop->GetNbPointAtLoop(i); j++)
    {
        CRDVertex* SPoint = CurveLoop->GetPoint(CurveLoop->GetPointAtLoop(i, j));
           
        InputParams.Add(SPoint->x);
        InputParams.Add(SPoint->y);
        InputParams.Add(SPoint->z);
                
        //wprintf_s(L"Point (%lf, %lf, %lf) ", (*Point)[0], (*Point)[1], (*Point)[2]);
        pSurfEval->GetParamAtPoint(InputParams.GetSafeArrayPtr(), GuessParams->GetSafeArrayPtr(), MaxDeviations->GetSafeArrayPtr(), OutputParam->GetSafeArrayPtr(), SolutionNatures->GetSafeArrayPtr());
        //wprintf_s(L"@ UV LIST (%lf, %lf)\n", (*Params)[0], (*Params)[1]);

        //wprintf_s(L"GetPrim(\"Null\", null, null, null);\n");
        //wprintf_s(L"Translate(null, %lf, 0, %lf, siAbsolute, siView, siObj, siXYZ, true, null, null, null, null, null, null, null, null, 0, null);\n", (*Params)[1], (*Params)[0]);
    

        double U = (*OutputParam)[0];
        double V = (*OutputParam)[1];

        GuessParams->Destroy();
        MaxDeviations->Destroy();
        SolutionNatures->Destroy();

        OutputParam->Destroy();
        InputParams.Destroy();

        InputParams.Add(U);
        InputParams.Add(V);
                        
        pSurfEval->GetPointAtParam(InputParams.GetSafeArrayPtr(), OutputParam->GetSafeArrayPtr());
        //wprintf_s(L"//Test %lf, %lf, %lf\n", (*Point)[0], (*Point)[1], (*Point)[2]);

        wprintf_s(L"GetPrim(\"Null\", null, null, null);\n");
        wprintf_s(L"Translate(null, %lf, %lf, %lf, siAbsolute, siView, siObj, siXYZ, true, null, null, null, null, null, null, null, null, 0, null);\n", (*OutputParam)[0], (*OutputParam)[1], (*OutputParam)[2]);

        OutputParam->Destroy();
        InputParams.Destroy();
     }
}