ftp.nice.ch/pub/next/tools/screen/backspace/old/Spiro3.N.bs.tar.gz#/Spiro3/Spiro3View.h

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#import <appkit/View.h>
#define NUMLINES 12
#define TWONUMLN 24
#define LINEWIDTH 0.10
#define PI 3.1415926
#define TWOP 6.2831852

@interface Spiro3View:View
{
  char ops[NUMLINES];

  int n,p,q,count;
  long int c;

  float pts[TWONUMLN],
  bbox[4],
  rho[NUMLINES], drho, 
  rad, drad,
  pinc,
  xscale, yscale,
  xdif,ydif,
  midx, midy; 

  int winNum;
}

- oneStep;
- newSize;
@end

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