lw_arc_is_pt()

int lw_arc_is_pt	(	const POINT2D *	A1,
		const POINT2D *	A2,
		const POINT2D *	A3
	)

Returns true if arc A is actually a point (all vertices are the same) .

Definition at line 121 of file lwalgorithm.c.

{
        if ( A1->x == A2->x && A2->x == A3->x &&
             A1->y == A2->y && A2->y == A3->y )
                return LW_TRUE;
        else
                return LW_FALSE;
}

References LW_FALSE, LW_TRUE, POINT2D::x, and POINT2D::y.

Referenced by lw_arc_length(), lw_dist2d_arc_arc(), lw_dist2d_pt_arc(), lw_dist2d_seg_arc(), and ptarrayarc_raycast_intersections().

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