lw_dist3d_pt_pt()

int lw_dist3d_pt_pt	(	POINT3DZ *	p1,
		POINT3DZ *	p2,
		DISTPTS3D *	dl
	)

Compares incoming points and stores the points closest to each other or most far away from each other depending on dl->mode (max or min)

Definition at line 832 of file measures3d.c.

{
        double dx = thep2->x - thep1->x;
        double dy = thep2->y - thep1->y;
        double dz = thep2->z - thep1->z;
        double dist = sqrt ( dx*dx + dy*dy + dz*dz);
        LWDEBUGF(2, "lw_dist3d_pt_pt called (with points: p1.x=%f, p1.y=%f,p1.z=%f,p2.x=%f, p2.y=%f,p2.z=%f)",thep1->x,thep1->y,thep1->z,thep2->x,thep2->y,thep2->z );
 
        if (((dl->distance - dist)*(dl->mode))>0) /*multiplication with mode to handle mindistance (mode=1)  and maxdistance (mode = (-1)*/
        {
                dl->distance = dist;
 
                if (dl->twisted>0)      /*To get the points in right order. twisted is updated between 1 and (-1) every time the order is changed earlier in the chain*/
                {
                        dl->p1 = *thep1;
                        dl->p2 = *thep2;
                }
                else
                {
                        dl->p1 = *thep2;
                        dl->p2 = *thep1;
                }
        }
        return LW_TRUE;
}

References DISTPTS3D::distance, LW_TRUE, LWDEBUGF, DISTPTS3D::mode, DISTPTS3D::p1, DISTPTS3D::p2, DISTPTS3D::twisted, POINT3DZ::x, POINT3DZ::y, and POINT3DZ::z.

Referenced by lw_dist3d_point_point(), lw_dist3d_pt_poly(), lw_dist3d_pt_seg(), lw_dist3d_ptarray_ptarray(), and lw_dist3d_seg_seg().

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