gen_ellipsegen_ellipseGenEllipseGenEllipsegen_ellipse (Operator)

Name

gen_ellipsegen_ellipseGenEllipseGenEllipsegen_ellipse — Create an ellipse.

Signature

gen_ellipse( : Ellipse : Row, Column, Phi, Radius1, Radius2 : )

Description

The operator gen_ellipsegen_ellipseGenEllipseGenEllipsegen_ellipse generates one or more ellipses with the center (RowRowRowrowrow, ColumnColumnColumncolumncolumn), the orientation PhiPhiPhiphiphi and the half-radii (half axes) Radius1Radius1Radius1radius1radius_1 and Radius2Radius2Radius2radius2radius_2. The angle is indicated in arc measure according to the x axis in mathematically positive direction. More than one region can be created by passing tuples of parameter values.

The center must be located within the image coordinates. The coordinate system runs from (0,0) (upper left corner) to (Width-1,Height-1). See get_systemget_systemGetSystemGetSystemget_system and reset_obj_dbreset_obj_dbResetObjDbResetObjDbreset_obj_db in this context. If the ellipse reaches beyond the edge of the image it is clipped to the current image format according to the value of the system flag 'clip_region'"clip_region""clip_region""clip_region""clip_region" (set_systemset_systemSetSystemSetSystemset_system).

Parameter Broadcasting

This operator supports parameter broadcasting. This means that each parameter can be given as a tuple of length 1 or 'N'"N""N""N""N". Parameters with tuple length 1 will be repeated internally such that the number of created items is always 'N'"N""N""N""N".

Execution Information

Multithreading type: reentrant (runs in parallel with non-exclusive operators).
Multithreading scope: global (may be called from any thread).
Processed without parallelization.

Parameters

EllipseEllipseEllipseellipseellipse (output_object) region(-array) → object

Created ellipse(s).

RowRowRowrowrow (input_control) ellipse.center.y(-array) → (real / integer)

Line index of center.

Default: 200.0

Suggested values: 0.0, 10.0, 20.0, 50.0, 100.0, 256.0, 300.0, 400.0

Value range: 1.0 ≤ Row Row Row row row ≤ 1024.0 (lin)

Minimum increment: 1.0

Recommended increment: 10.0

ColumnColumnColumncolumncolumn (input_control) ellipse.center.x(-array) → (real / integer)

Column index of center.

Default: 200.0

Suggested values: 0.0, 10.0, 20.0, 50.0, 100.0, 256.0, 300.0, 400.0

Value range: 1.0 ≤ Column Column Column column column ≤ 1024.0 (lin)

Minimum increment: 1.0

Recommended increment: 10.0

PhiPhiPhiphiphi (input_control) ellipse.angle.rad(-array) → (real / integer)

Orientation of the longer radius (Radius1).

Default: 0.0

Suggested values: -1.178097, -0.785398, -0.392699, 0.0, 0.392699, 0.785398, 1.178097

Value range: -1.178097 ≤ Phi Phi Phi phi phi ≤ 1.178097 (lin)

Radius1Radius1Radius1radius1radius_1 (input_control) ellipse.radius1(-array) → (real / integer)

Longer radius.

Default: 100.0

Suggested values: 2.0, 5.0, 10.0, 20.0, 50.0, 100.0, 256.0, 300.0, 400.0

Value range: Radius1 Radius1 Radius1 radius1 radius_1 (lin)

Minimum increment: 1.0

Recommended increment: 10.0

Restriction: Radius1 > 0

Radius2Radius2Radius2radius2radius_2 (input_control) ellipse.radius2(-array) → (real / integer)

Shorter radius.

Default: 60.0

Suggested values: 1.0, 2.0, 4.0, 5.0, 10.0, 20.0, 50.0, 100.0, 256.0, 300.0, 400.0

Value range: Radius2 Radius2 Radius2 radius2 radius_2 (lin)

Minimum increment: 1.0

Recommended increment: 10.0

Restriction: Radius2 > 0 && Radius2 <= Radius1

Example (HDevelop)

read_image (Image, 'fabrik')
gen_ellipse (Ellipse, 200, 200, rad(10), 160, 90)
reduce_domain (Image, Ellipse, ImageReduced)
dev_clear_window ()
dev_display (ImageReduced)