Patch Routines.


patchbasis(tbasis, ubasis)

Define the t and u basis matrices of a patch.

    Fortran:
         subroutine patchbasis(tbasis, ubasis)
         real tbasis(4, 4), ubasis(4, 4)
    C:
         patchbasis(tbasis, ubasis)
              float     tbasis[4][4], ubasis[4][4];

    Pascal:
         procedure PatchBasis(tbasis, ubasis: Matrix44_t)

patchprecision(tseg, useg)

Set the minimum number of line segments making up curves in a patch.

    Fortran:
         subroutine patchprecision(tseg, useg)
         integer tseg, useg
    C:
         patchprecision(tseg, useg)
              int     tseg, useg;

    Pascal:
         procedure PatchPrecision(tseg, useg: integer)

patchcurves(nt, nu)

Set the number of curves making up a patch.

    Fortran:
         subroutine patchcurves(nt, nu)
         integer nt, nu
    C:
         patchcurves(nt, nu)
              int     nt, nu;

    Pascal:
         procedure PatchCurves(nt, nu: integer)

rpatch(gx, gy, gz, gw)

Draws a rational patch in the current basis, according to the geometry matrices gx, gy, gz, and gw.

    Fortran:
         subroutine rpatch(gx, gy, gz, gw)
         real  gx(4,4), gy(4,4), gz(4,4), gw(4,4)
    C:
         rpatch(gx, gy, gz, gw)
             float  gx[4][4], gy[4][4], gz[4][4], gw[4][4];

    Pascal:
         procedure Rpatch(gx, gy, gz, gw: Matrix44_t)

patch(gx, gy, gz)

Draws a patch in the current basis, according to the geometry matrices gx, gy, and gz.

    Fortran:
         subroutine patch(gx, gy, gz)
         real  gx(4,4), gy(4,4), gz(4,4)
    C:
         patch(gx, gy, gz)
              float  gx[4][4], gy[4][4], gz[4][4];

    Pascal:
         procedure Patch(gx, gy, gz: Matrix44_t)