help upgrading from Performer 1.2 to Performer 2.2

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Baez Elbert M NPRI (BaezEM++at++Npt.NUWC.Navy.Mil)
Thu, 6 May 1999 09:44:22 -0400

Hello:
        As part of my job I have been upgrading an old C Performer 1.2
application to C++ Performer 2.2. While doing so I came across a function
that is causing compiling errors. This function goes by the name of
texgen().
        Here is a piece of the Performer 1.2 source code I have been trying
to port to Performer 2.2.

                int PreDrawReflMap(pfTraverser *, void *)
                {
                        texgen(TX_S, TG_SPHEREMAP, 0);
                        texgen(TX_T, TG_SPHEREMAP, 0);
                        texgen(TX_S, TG_ON, NULL);
                        texgen(TX_T, TG_ON, NULL);

                        return NULL;
                }

        And these are some of the error messages I have been getting from
the C++ compiler (in Irix 6.5).

                "omni_effects.cc", line 1174: error(1020): identifier
"texgen" is undefined
                        texgen(TX_S, TG_SPHEREMAP, 0);
                        ^

                "omni_effects.cc", line 1174: error(1020): identifier "TX_S"
is undefined
                        texgen(TX_S, TG_SPHEREMAP, 0);
                               ^

                "omni_effects.cc", line 1174: error(1020): identifier
"TG_SPHEREMAP" is
                          undefined
                        texgen(TX_S, TG_SPHEREMAP, 0);
                                     ^

        I did a "man texgen" and this is partly what it showed:

                NAME
                     texgen - specify automatic generation of texture
coordinates

                FORTRAN SPECIFICATION
                     subroutine texgen(coord, mode, params)
                     integer*4 coord, mode
                     real params()
                .
                .
                .

        This function (texgen()) seems to be a Fortran call, but it was
called from a Performer 1.2 application. My question is: How can I make a
call to texgen() from Performer 2.2? Which is the correct way to do it?

        Can anyone please help me out with this issue? Any hints will be
greatly appreciated!

                                        Thank you very much!,
                                                Elbert

________________________________

 Elbert M. Baez
 NUWC DIVISION NEWPORT
 Code 61, Bldg. 1320, Rm. 553
 1176 Howell St.
 Newport, RI 02841-1708
 phone: (401) 832-5751
 fax : (401) 832-7440
 email: BaezEM++at++Npt.NUWC.Navy.Mil
________________________________

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