gen_checker_regiongen_checker_regionGenCheckerRegionGenCheckerRegiongen_checker_region (算子名称)

名称

gen_checker_regiongen_checker_regionGenCheckerRegionGenCheckerRegiongen_checker_region — Create a checkered region.

参数签名

gen_checker_region( : RegionChecker : WidthRegion, HeightRegion, WidthPattern, HeightPattern : )

描述

The operator gen_checker_regiongen_checker_regionGenCheckerRegionGenCheckerRegionGenCheckerRegiongen_checker_region returns a checkered region. Every black field of the checkerboard belongs to the region. The horizontal and vertical expansion of the region is limited by WidthRegionWidthRegionWidthRegionWidthRegionwidthRegionwidth_region, HeightRegionHeightRegionHeightRegionHeightRegionheightRegionheight_region respectively, the size of the fields of the checkerboard by WidthPatternWidthPatternWidthPatternWidthPatternwidthPatternwidth_pattern * HeightPatternHeightPatternHeightPatternHeightPatternheightPatternheight_pattern.

注意

If a very small pattern is chosen (WidthPatternWidthPatternWidthPatternWidthPatternwidthPatternwidth_pattern < 4) the created region requires much storage.

运行信息

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

参数表

RegionCheckerRegionCheckerRegionCheckerRegionCheckerregionCheckerregion_checker (output_object) region → object

Created checkerboard region.

WidthRegionWidthRegionWidthRegionWidthRegionwidthRegionwidth_region (input_control) extent.x → (integer)

Largest occurring x value of the region.

Default: 511

Suggested values: 10, 20, 31, 63, 127, 255, 300, 400, 511

Value range: 1 ≤ WidthRegion WidthRegion WidthRegion WidthRegion widthRegion width_region (lin)

Minimum increment: 1

Recommended increment: 10

HeightRegionHeightRegionHeightRegionHeightRegionheightRegionheight_region (input_control) extent.y → (integer)

Largest occurring y value of the region.

Default: 511

Suggested values: 10, 20, 31, 63, 127, 255, 300, 400, 511

Value range: 1 ≤ HeightRegion HeightRegion HeightRegion HeightRegion heightRegion height_region (lin)

Minimum increment: 1

Recommended increment: 10

WidthPatternWidthPatternWidthPatternWidthPatternwidthPatternwidth_pattern (input_control) extent.x → (integer)

Width of a field of the checkerboard.

Default: 64

Suggested values: 1, 2, 4, 8, 16, 20, 32, 64, 100, 128, 200, 300, 500

Value range: 1 ≤ WidthPattern WidthPattern WidthPattern WidthPattern widthPattern width_pattern (lin)

Minimum increment: 1

Recommended increment: 10

Restriction: WidthPattern < WidthRegion

HeightPatternHeightPatternHeightPatternHeightPatternheightPatternheight_pattern (input_control) extent.y → (integer)

Height of a field of the checkerboard.

Default: 64

Suggested values: 1, 2, 4, 8, 16, 20, 32, 64, 100, 128, 200, 300, 500

Value range: 1 ≤ HeightPattern HeightPattern HeightPattern HeightPattern heightPattern height_pattern (lin)

Minimum increment: 1

Recommended increment: 10

Restriction: HeightPattern < HeightRegion

例程 (HDevelop)

gen_checker_region(Checker,512,512,32,64)
dev_set_draw('fill')
dev_display (Checker)

Complexity

The required storage (in bytes) for the region is:

O((WidthRegionWidthRegionWidthRegionWidthRegionwidthRegionwidth_region * HeightRegionHeightRegionHeightRegionHeightRegionheightRegionheight_region) / WidthPatternWidthPatternWidthPatternWidthPatternwidthPatternwidth_pattern)

结果

The operator gen_checker_regiongen_checker_regionGenCheckerRegionGenCheckerRegionGenCheckerRegiongen_checker_region returns the value 2 ( H_MSG_TRUE) if the parameter values are correct. 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

可替代算子

gen_grid_regiongen_grid_regionGenGridRegionGenGridRegionGenGridRegiongen_grid_region, gen_region_polygon_filledgen_region_polygon_filledGenRegionPolygonFilledGenRegionPolygonFilledGenRegionPolygonFilledgen_region_polygon_filled, gen_region_pointsgen_region_pointsGenRegionPointsGenRegionPointsGenRegionPointsgen_region_points, gen_region_runsgen_region_runsGenRegionRunsGenRegionRunsGenRegionRunsgen_region_runs, gen_rectangle1gen_rectangle1GenRectangle1GenRectangle1GenRectangle1gen_rectangle1, concat_objconcat_objConcatObjConcatObjConcatObjconcat_obj, gen_random_regiongen_random_regionGenRandomRegionGenRandomRegionGenRandomRegiongen_random_region, gen_random_regionsgen_random_regionsGenRandomRegionsGenRandomRegionsGenRandomRegionsgen_random_regions

参考其它

reduce_domainreduce_domainReduceDomainReduceDomainReduceDomainreduce_domain

模块

Foundation

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