azimuth_pt_pt()

int azimuth_pt_pt ( const POINT2D *  A, const POINT2D *  B, double *  d  )

extern

Compute the azimuth of segment AB in radians.

Return 0 on exception (same point), 1 otherwise.

Definition at line 2408 of file measures.c.

{
        if (A->x == B->x && A->y == B->y)
                return LW_FALSE;
        *d = fmod(2 * M_PI + M_PI / 2 - atan2(B->y - A->y, B->x - A->x), 2 * M_PI);
        return LW_TRUE;
}

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

Referenced by _lwt_AddEdge(), _lwt_FindAdjacentEdges(), _lwt_InitEdgeEndByLine(), _lwt_SnapEdgeToExistingNode(), LWGEOM_angle(), LWGEOM_azimuth(), lwt_edgeEnd_fromEdge(), and lwt_GetFaceContainingPoint().

Here is the caller graph for this function: