help with stupid problem probably quickly fixed

[crevard]

hello

ok i'm compiling a simple programm i get an error.
here it is:

error C2664: '__thiscall gstTriPolyMesh::gstTriPolyMesh(int,int,double ** ,int,int,int ** ,int)' : cannot convert parameter 3 from 'double [16][3]' to 'double **

i'm passing to arrays to this constructor declared as such.
the contructeor line is:
gstTriPolyMesh *triMesh = new gstTriPolyMesh(16,3,points,14,4,tris,true);

double points[16][3] = {
{0.0,0.0,18.0},
{0.0,18.0,18.0},
{18.0,0.0,18.0},
{18.0,18.0,18.0},
{36.0,0.0,18.0},
{36.0,18.0,18.0},
{54.0,0.0,18.0},
{54.0,18.0,18.0},
{0.0,0.0,0.0},
{18.0,0.0,0.0},
{36.0,0.0,0.0},
{54.0,0.0,0.0},
{0.0,18.0,0.0},
{18.0,18.0,0.0},
{36.0,18.0,0.0},
{54.0,18.0,0.0}};

and
int tris [14][4]={
{3,2,1,0},
{5,4,3,2},
{7,5,4,6},
{0,1,12,8},
{11,15,7,6},
{10,14,15,11},
{9,13,14,10},
{8,12,13,9},
{13,12,1,2},
{14,13,2,5},
{15,14,5,7},
{9,8,0,13},
{10,9,13,4},
{11,10,4,7}
};

anyone can help.
If you answer quickly i am prepared to offer a donut.

 

[woja]

The complier is right:

   double a[3][3] = {
         { 0.0, 0.0, 0.0 }
      ,  { 0.0, 0.0, 0.0 }
      ,  { 0.0, 0.0, 0.0 }
   };

declares an array of three arrays of [tt]double[/tt] and not three an array of three arrays of [tt]double*[/tt] (which is what the constructor wants).

(doughuts unfortunately don't cross the Atlantic well, losing weight going westward, gaining it coming east).

[tt]________________________________________________________________
Roger
Life is a game of cards in which the deck contains only jokers.[/tt]

 

[crevard]

so how do i declare a double**
so according to the example three arrays double* of three double.

 

[woja]

The simplest way is this:

   double a[3][3] = {
         { 0.0, 0.0, 0.0 }
      ,  { 0.0, 0.0, 0.0 }
      ,  { 0.0, 0.0, 0.0 }
   };
   double* b[3] = { &a[0], &a[1], &a[2] };

Not elegant, but simple.
Another way would be to define a new constructor which can take arguments of the type you want to define (but, of course, this may not be possible).
A third way would be to create a function to create an array of [tt]double*[/tt] from your arrays.

[tt]________________________________________________________________
Roger
Life is a game of cards in which the deck contains only jokers.[/tt]

 

[woja]

The following might help (the class [tt]CPointArray[/tt] is not complete, just an outline):

class CPointArray {
   // the number of points;
   private:      size_t m_points;
   // the array;
   private:      double** m_array;
   // constructor;
   public:      CPointArray(
                      double aArray[][3], size_t aCount
                ) {
                   m_points = aCount;
                   m_array = new double*[m_points];
                   for (size_t i = 0; (i < m_points); ++i) {
                   m_array[i] = new double[3];
                      for (size_t j = 0; (i > 3); ++j) {
                         m_array[i][j] = aArray[i][j];
                      }
                   }
                   return;
                };
   // destructor;
   public:      ~CPointArray() {
                   for (size_t i = 0; (i < m_points); ++i) {
                      delete[] m_array[i];
                   }
                   delete[] m_array;
                   return;
                };
   // cast;
   public:      operator double**() { return m_array; };
};

double points[16][3] = {
      { 0.0,  0.0, 18.0}
   ,  { 0.0, 18.0, 18.0}
   ,  {18.0,  0.0, 18.0}
   ,  {18.0, 18.0, 18.0}
   ,  {36.0,  0.0, 18.0}
   ,  {36.0, 18.0, 18.0}
   ,  {54.0,  0.0, 18.0}
   ,  {54.0, 18.0, 18.0}
   ,  { 0.0,  0.0,  0.0}
   ,  {18.0,  0.0,  0.0}
   ,  {36.0,  0.0,  0.0}
   ,  {54.0,  0.0,  0.0}
   ,  { 0.0, 18.0,  0.0}
   ,  {18.0, 18.0,  0.0}
   ,  {36.0, 18.0,  0.0}
   ,  {54.0, 18.0,  0.0}
};

CPointArray pointsMine(points, 16);
gstTriPolyMesh *triMesh = new gstTriPolyMesh(16,3, pointsMine,14,4,tris,true);

[tt]________________________________________________________________
Roger
Life is a game of cards in which the deck contains only jokers.[/tt]