Re: please try POV-Ray and VRML terminals (Re: Now working on POV-Ray terminal)

[Petr M. <mi...@ph...>]

> After a quick look at what would be needed, I think you could start out
> by adding only 2 new terminal API definitions
> 	term->move3d(double x, double y, double z);
> 	term->vector3d(double x, double y, double z);
>
> Two more that might or might not be needed
> 	term->point3d();
> 	term->put_text3d();
> These latter two could maybe be omitted if 3D terminals used a convention
> that you must do an explicit move prior to writing a point or a text string.
>
> The most interesting 3D drawing element, term->filled_polygon(),
> already passes a structure pointer rather than in-line coordinates.

The terminal should have a "IS3D" flag.

Another working scheme, instead of flooding all 2D terminals with dummy 3D
routines, is a single generic API
  term->do3d(XX3D_MOVE, param1, param2)
  term->do3d(XX3D_VECTOR, param1, param2, param3)
  term->do3d(XX3D_POINT, param1, param2, param3)
  term->do3d(XX3D_OPACITY, param1, param2, param3)
  term->do3d(XX3D_LIGHT, param1)
  term->do3d(XX3D_SKY, param1)
etc.
Can those term->do3d() have variable argument list?
If not, do3d_1param, do3d_2params, do3d_3params.

---
PM