ptarray_scale()

void ptarray_scale	(	POINTARRAY *	pa,
		const POINT4D *	factor
	)

Scale a pointarray.

Definition at line 1851 of file ptarray.c.

References getPoint4d_p(), LWDEBUG, POINT4D::m, POINTARRAY::npoints, ptarray_set_point4d(), POINT4D::x, POINT4D::y, and POINT4D::z.

Referenced by lwgeom_scale(), and test_ptarray_scale().

{
  int i;
  POINT4D p4d;

  LWDEBUG(3, "ptarray_scale start");

  for (i=0; i<pa->npoints; ++i)
  {
    getPoint4d_p(pa, i, &p4d);
    p4d.x *= fact->x;
    p4d.y *= fact->y;
    p4d.z *= fact->z;
    p4d.m *= fact->m;
    ptarray_set_point4d(pa, i, &p4d);
  }

  LWDEBUG(3, "ptarray_scale end");

}

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