gen_region_hline — Store input lines described in Hesse normal form as regions.
gen_region_hline( : Regions : Orientation, Distance : )
The operator gen_region_hline stores the lines described in Hesse
normal form as regions. A line is determined by the distance from the line
to the origin (Distance, corresponds to the length of the normal
vector) and the direction of the normal vector (Orientation,
corresponds to the orientation of the line ).
The directions were defined in such a way that
at Orientation = 0 the normal vector lies in the direction of
the X axis, which corresponds to a vertical line.
At Orientation =
the normal vector points in the direction
of the Y axis, i.e. a horizontal line is described.
The lines are clipped to the current maximum image format.
Regions (output_object) region(-array) → object
Created regions (one for every line), clipped to maximum image format.
Number of elements: Regions == Distance
Orientation (input_control) hesseline.angle.rad(-array) → (real / integer)
Orientation of the normal vector in radians.
Number of elements: Orientation == Distance
Default: 0.0
Suggested values: -0.78, 0.0, 0.78, 1.57
Value range:
Orientation
(lin)
Recommended increment: 0.02
Distance (input_control) hesseline.distance(-array) → (real / integer)
Distance from the line to the coordinate origin (0.0).
Default: 200
Suggested values: 10, 50, 100, 200, 300, 400
Value range:
Distance
(lin)
Recommended increment: 1
The operator gen_region_hline always returns the value 2 (
H_MSG_TRUE)
.
Foundation