I'm very new at Povray.


I want to find intersection of 30 planes and 19 quadratics, plane normals
and points are given in 2-dimensional array p and q, coefficients of
quadratics given in 2-dimensional array qq.


  #declare i=0;
  #declare j=0;


  #while (i<30)


  intersection{

  plane
{<p[i][0],p[i][1],p[i][2]>,p[i][0]*q[i][0]+p[i][1]*q[i][1]+p[i][2]*q[i][2]
}
pigment { color Red}
}

   #while (j<19)

  intersection {

  quadric
  {

<qq[j][2],qq[j][4],qq[j][6]>,<qq[j][7],qq[j][8],qq[j][9]>,<qq[j][1],qq[j][3],qq[j][5]>,qq[j][0]

  }
  pigment { color Red}
 }
  #declare j=j+1;

  #end


  #declare i=i+1;

  #end


 camera {
  location <10,10,50>
  look_at 0
}
light_source { <10, 10, 10> White }
 plane { y, -2 // y means <0,1,0>
  pigment { color Yellow}

}


I just see a black screen, why?

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