gen_ellipsegen_ellipseGenEllipseGenEllipsegen_ellipse (算子名称)

名称

gen_ellipsegen_ellipseGenEllipseGenEllipsegen_ellipse — Create an ellipse.

参数签名

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

描述

该算子 gen_ellipsegen_ellipseGenEllipseGenEllipseGenEllipsegen_ellipse generates one or more ellipses with the center (RowRowRowRowrowrow, ColumnColumnColumnColumncolumncolumn), the orientation PhiPhiPhiPhiphiphi and the half-radii (half axes) Radius1Radius1Radius1Radius1radius1radius_1 and Radius2Radius2Radius2Radius2radius2radius_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_systemGetSystemGetSystemGetSystemget_system and reset_obj_dbreset_obj_dbResetObjDbResetObjDbResetObjDbreset_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""clip_region" (set_systemset_systemSetSystemSetSystemSetSystemset_system).

运行信息

多线程类型:可重入(与非独占操作符并行运行)。
多线程作用域:全局(可以从任何线程调用)。
未经并行化处理。

参数表

EllipseEllipseEllipseEllipseellipseellipse (output_object) region(-array) → object

Created ellipse(s).

RowRowRowRowrowrow (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 row ≤ 1024.0 (lin)

Minimum increment: 1.0

Recommended increment: 10.0

ColumnColumnColumnColumncolumncolumn (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 column ≤ 1024.0 (lin)

Minimum increment: 1.0

Recommended increment: 10.0

PhiPhiPhiPhiphiphi (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 phi ≤ 1.178097 (lin)

Radius1Radius1Radius1Radius1radius1radius_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 radius1 radius_1 (lin)

Minimum increment: 1.0

Recommended increment: 10.0

Restriction: Radius1 > 0

Radius2Radius2Radius2Radius2radius2radius_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 radius2 radius_2 (lin)

Minimum increment: 1.0

Recommended increment: 10.0

Restriction: Radius2 > 0 && Radius2 <= Radius1

例程 (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)

Complexity

Runtime complexity: O(Radius1Radius1Radius1Radius1radius1radius_1 * 2)

Storage complexity (byte): O(Radius1Radius1Radius1Radius1radius1radius_1 * 8)

结果

If the parameter values are correct, 该算子 gen_ellipsegen_ellipseGenEllipseGenEllipseGenEllipsegen_ellipse 返回值 2 ( H_MSG_TRUE) . Otherwise an exception is raised. The clipping according to the current image format is set via the operator set_system('clip_region',<'true'/'false'>)set_system("clip_region",<"true"/"false">)SetSystem("clip_region",<"true"/"false">)SetSystem("clip_region",<"true"/"false">)SetSystem("clip_region",<"true"/"false">)set_system("clip_region",<"true"/"false">).

可能的后置算子

paint_regionpaint_regionPaintRegionPaintRegionPaintRegionpaint_region, reduce_domainreduce_domainReduceDomainReduceDomainReduceDomainreduce_domain

可替代算子

gen_circlegen_circleGenCircleGenCircleGenCirclegen_circle, gen_region_polygon_filledgen_region_polygon_filledGenRegionPolygonFilledGenRegionPolygonFilledGenRegionPolygonFilledgen_region_polygon_filled, draw_ellipsedraw_ellipseDrawEllipseDrawEllipseDrawEllipsedraw_ellipse

参考其它

disp_ellipsedisp_ellipseDispEllipseDispEllipseDispEllipsedisp_ellipse, set_shapeset_shapeSetShapeSetShapeSetShapeset_shape, smallest_circlesmallest_circleSmallestCircleSmallestCircleSmallestCirclesmallest_circle, reduce_domainreduce_domainReduceDomainReduceDomainReduceDomainreduce_domain

模块

Foundation

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