class EV_RELATIVE_POINT General cluster: interface description: "Positions relative to other positions. Takes another relative point as origin and then defines a hor. & vert. scaling factor, x, y and angle. You can then access absolute scale_x, scale_y, x, y and angle which are recomputed only if invalidate_absolute_position has been called. You may also choose to specify a positioner. This is an agent that gets called everytime a recomputation is requested. When a positioner is installed, the other attributes are ignored. The x and y are transformed by the angle and scaling of the origin. This implies that the scale_x, scale_y and angle features of this object are only for propagation to referring points." keywords: "point, position, location, origin" create: make_with_position, make_with_origin, default_create, make_with_positioner, make_with_origin_and_position Ancestors EV_FIGURE_MATH IDENTIFIED Queries absolute_coordinates: EV_COORDINATE angle: REAL_64 angle_abs: REAL_64 being_positioned: BOOLEAN has_positioner: BOOLEAN id_object (an_id: INTEGER_32): IDENTIFIED object_id: INTEGER_32 origin: EV_RELATIVE_POINT out_abs: STRING_8 out_rel: STRING_8 positioner: PROCEDURE [ANY, TUPLE [[like Current] EV_RELATIVE_POINT]] relative_to (org: EV_RELATIVE_POINT): BOOLEAN scale_x: REAL_64 scale_x_abs: REAL_64 scale_y: REAL_64 scale_y_abs: REAL_64 x: INTEGER_32 x_abs: INTEGER_32 y: INTEGER_32 y_abs: INTEGER_32 Commands change_origin (new_origin: EV_RELATIVE_POINT) set_angle (new_angle: REAL_64) set_angle_abs (new_angle_abs: REAL_64) set_origin (new_origin: EV_RELATIVE_POINT) set_position (new_x, new_y: INTEGER_32) set_positioner (pos_agent: [like positioner] PROCEDURE [ANY, TUPLE [[like Current] EV_RELATIVE_POINT]]) set_scale (new_scale: REAL_64) set_scale_x (new_scale_x: REAL_64) set_scale_x_abs (new_scale_x_abs: REAL_64) set_scale_y (new_scale_y: REAL_64) set_scale_y_abs (new_scale_y_abs: REAL_64) set_x (new_x: INTEGER_32) set_x_abs (new_x_abs: INTEGER_32) set_y (new_y: INTEGER_32) set_y_abs (new_y_abs: INTEGER_32) Constraints notify list exists has origin implies origin notifies