A problem generating Normals automatly

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Angel-Ventura Mendo Gomez (ventura++at++labri.u-bordeaux.fr)
Fri, 30 Apr 1999 15:08:32 +0200

Hello :

        I'm writing a performer loader and I want to generate de normals
automatly.

the source is :

extern pfNode *
pfdLoadFile_ventura (char *fileName)
{
  long vertexNumber=0;
  long trianglesNumber=0;
  long i,a,b,c;
  float *vertexList;
  pfNode *node=NULL;
  FILE *fildes=NULL;
  pfdGeom *prim=NULL;

  /* discard any lingering geometry in the builders */
  pfdResetBldrGeometry();
  pfdResetBldrState();
   
  /* Setting mode */
  pfdBldrStateMode(PFDGBLDR_AUTO_NORMALS, PF_ON
/*PFDGBLDR_NORMALS_GENERATE*//*PFDGBLDR_NORMALS_MISSING*/);
  pfdBldrMode(PFDBLDR_AUTO_NORMALS, PF_ON);

  /* openig filde*/
  if ((fildes=pfdOpenFile(fileName)) == NULL){
    pfNotify(PFNFY_WARN, PFNFY_MORE, "+ Error Opening: %s",
fileName);
    return NULL;
  }

  /* */
  fscanf(fildes,"%d",&vertexNumber);
  fscanf(fildes,"%d",&trianglesNumber);

  /* allocate primitive buffer */
  prim = pfdNewGeom(3);

  /* specify control data */
  prim->numVerts = 3;
  prim->primtype = PFGS_POLYS;
  prim->nbind = PFGS_PER_VERTEX;
  prim->cbind = PFGS_OFF;
  prim->tbind = PFGS_OFF;

  vertexList=(float *)malloc(sizeof(float)*3*vertexNumber);

  for (i = 0; i < vertexNumber; i++){

    fscanf(fildes, "%f %f %f",
           &vertexList[(i*3)],
           &vertexList[(i*3)+1],
           &vertexList[(i*3)+2]);

  }
  for (i = 0; i < trianglesNumber; i++){
    fscanf(fildes, "%d %d %d",&a,&b,&c);
    prim->coords[0][PF_X]=vertexList[(3*a) ];
    prim->coords[0][PF_Y]=vertexList[(3*a)+1];
    prim->coords[0][PF_Z]=vertexList[(3*a)+2];

    prim->coords[1][PF_X]=vertexList[(b*3) ];
    prim->coords[1][PF_Y]=vertexList[(b*3)+1];
    prim->coords[1][PF_Z]=vertexList[(b*3)+2];

    prim->coords[2][PF_X]=vertexList[(c*3) ];
    prim->coords[2][PF_Y]=vertexList[(c*3)+1];
    prim->coords[2][PF_Z]=vertexList[(c*3)+2];

    pfdAddBldrGeom(prim, 1);
  }

  node=pfdBuild();

  pfdDelGeom(prim);
  free(vertexList);
  fclose(fildes);

  return node;
}

I think there is a problem with :

  pfdBldrStateMode(PFDGBLDR_AUTO_NORMALS, PFDGBLDR_NORMALS_GENERATE);
  pfdBldrMode(PFDBLDR_AUTO_NORMALS, PF_ON);

Anyone can help me ?

                thanks 

--
	ventura++at++labri.u-bordeaux.fr
	http://dept-info.labri.u-bordeaux.fr/~ventura
 Quod natura non dat Salmantica non praestat.

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