ftp.nice.ch/pub/next/graphics/3d/geomview.1.4.1.s.tar.gz#/Geomview/src/lib/pointlist/ptlInst.c

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#include "ooglutil.h"
#include "geom.h"
#include "instP.h"
#include "pointlistP.h"

void *inst_PointList_get(int sel, Geom *geom, va_list args);
void *inst_PointList_fillin(int sel, Geom *geom, va_list args);
void *inst_PointList_set(int sel, Geom *geom, va_list args);
void *inst_PointList_length(int sel, Geom *geom, va_list args);

#define MAX_METHODS 4

static SpecFunc methods[] = {
  "PointList_get", inst_PointList_get,
  "PointList_fillin", inst_PointList_fillin,
  "PointList_set", inst_PointList_set,
  "PointList_length", inst_PointList_length
};

static char msg[] = "ptlInst.c";

ptlInst_init() {
  pointlist_initspec(methods, MAX_METHODS, GeomClassLookup("inst"));
}

void *inst_PointList_get(int sel, Geom *geom, va_list args) {
  Inst *i = (Inst *)geom;
  HPoint3 *plist;
  int n_points;
  float **t;
  int coordsys;

  n_points = (int)GeomCall(GeomMethodSel("PointList_length"), geom);
  plist = OOGLNewNE(HPoint3, n_points, msg);

  t = va_arg(args, float **);
  coordsys = va_arg(args, int);

  return GeomCall(GeomMethodSel("PointList_fillin"), geom, t, 
		  coordsys, plist);

}

void *inst_PointList_fillin(int sel, Geom *geom, va_list args) {
  Inst *inst = (Inst *)geom;
  HPoint3 *plist;
  int coordsys;
  GeomIter *it;
  Transform Tnew;
  int i, n_points;
  float **t;

  t = va_arg(args, float **);
  coordsys = va_arg(args, int);
  plist = va_arg(args, HPoint3 *);

  n_points = (int)GeomCall(GeomMethodSel("PointList_length"), inst->geom);

  it = GeomIterate(geom, DEEP);
  for (i = 0; NextTransform(it, Tnew); i += n_points) 
    if (coordsys == POINTLIST_SELF) {
      TmConcat(Tnew, t, Tnew);
      GeomCall(GeomMethodSel("PointList_fillin"), inst->geom, &Tnew[0][0],
	       coordsys, &plist[i]);
    } else if (coordsys == POINTLIST_PRIMITIVE) 
      GeomCall(GeomMethodSel("PointList_fillin"), inst->geom, t, coordsys,
	       &plist[i]);
    else {
      OOGLError(1, "Unrecognized coordinate system in inst_PointList_fillin");
      return NULL;
    }

  return plist;

}


void *inst_PointList_set(int sel, Geom *geom, va_list args) {
  Inst *inst = (Inst *)geom;
  HPoint3 *plist;
  Transform T, TInv;
  int coordsys;
  GeomIter *it;

  coordsys = va_arg(args, int);
  plist = va_arg(args, HPoint3 *);

  /* If the point list has more than one copy of the points 
   * of the geom in it, just use the first set */
  it = GeomIterate(geom, DEEP);
  if (NextTransform(it, T) && coordsys == POINTLIST_SELF) {
    Tm3Invert(T, TInv);
    HPt3TransformN(TInv, plist, plist, 
		   GeomCall(GeomMethodSel("PointList_length"), inst->geom));
  }
  GeomCall(GeomMethodSel("PointList_set"), inst->geom, coordsys, plist);
  return NULL;

}


void *inst_PointList_length(int sel, Geom *geom, va_list args) {
  Inst *inst = (Inst *)geom;
  int i, n_points;
  Transform T;
  GeomIter *it;

  n_points = 
    (int)GeomCall(GeomMethodSel("PointList_length"), inst->geom);
  it = GeomIterate(geom, DEEP);
  for (i = 0; NextTransform(it, T); i += n_points);
  return (void *)i;

}

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.