Hello everyone!

I need some smooth ribbon trail for a project and I can't find any good solution.
I want to transform a simple curve in a surface. I got an array with all my points(in 3D).
I'm using Daniel Shiffman Vector3D library for my points, and all I find to compute the necessary vertex is the cross product.I'm not so good at 3d mathematics and I think I need something else.
Here is my code for the ribbon:

 void render(){
   pushMatrix();
   fill(0,20);
   noStroke();
   int div = 1;
   Vector3D loc1 = (Vector3D) parts.get(0);
   for(int i=div; i<parts.size(); i+=div){
          Vector3D loc2 = (Vector3D) parts.get(i);
          Vector3D cross1 = loc1.cross(loc2);
          cross1.normalize();
          cross1.mult(20);
          beginShape();  
   vertex(loc1.x-cross1.x,loc1.y-cross1.y,loc1.z-cross1.z);
vertex(loc1.x+cross1.x,loc1.y+cross1.y,loc1.z+cross1.z);
vertex(loc2.x+cross1.x,loc2.y+cross1.y,loc2.z+cross1.z);
vertex(loc2.x-cross1.x,loc2.y-cross1.y,loc2.z-cross1.z);
          endShape();
          loc1 = loc2.copy();
     }
   popMatrix();
 }

"parts" is an ArrayList with all my Vector3D points.

Do someone have any good suggestion for me? an url where they explain the maths behind that or maybee even a solution? ;-)

Thanks in advance.

Cheers,
Simon.