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File: rotate.c

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circlepack 5.1-3
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#include "cp_types.h"
#include "cp_proto.h"

/* rotate pack p by angle ang (radians). */

int rotate(struct p_data *p,double ang)
{
  int i;
  struct R_data *pR_ptr;
	
  if (p->hes > 0) /* spherical? */
    {
      sprintf(msgbuf,"Rotate spherical packings using 'sph_view'.");
      emsg();
      return 0;
    }
  pR_ptr=p->packR_ptr;
  for (i=1;i<=p->nodecount;i++)
    pR_ptr[i].center=mob_rotate(pR_ptr[i].center,ang);
  return 1;
} /* rotate */