00. 目錄

文章目錄

• • 00. 目錄
  • 01. 概述
  • 02. 簽名
  • 03. 描述
  • 04. 注意
  • 05. 參數(shù)
  • 06. 結(jié)果
  • 07. 附錄

01. 概述

while - 只要條件為真就開始執(zhí)行循環(huán)。

02. 簽名

while( : : Condition : )

03. 描述

只要Condition參數(shù)的值為’true’（或者數(shù)字不等于0），while就會(huì)循環(huán)運(yùn)行相應(yīng)的endwhile語句內(nèi)的循環(huán)體。

如果Condition判定為’false’（0），則程序在相應(yīng)的endwhile語句之后繼續(xù)運(yùn)行。

原文描述：

while executes the loop body up to the corresponding endwhile statement as long as the Condition parameter evaluates to ‘true’ (or a number not equal 0).

If the condition evaluates to ‘false’ (0) the program is continued after the corresponding endwhile statement.

04. 注意

無

05. 參數(shù)

Condition (input_control) integer → (integer)
　　循環(huán)的條件

06. 結(jié)果

如果指定參數(shù)的值正確，while（作為算子）返回2（H_MSG_TRUE）。 否則會(huì)引發(fā)異常并返回錯(cuò)誤代碼。

HDevelop例程

while.hdev Use a while loop to provide interaction until right mouse button is clicked

程序示例

dev_update_window ('off') dev_close_window () dev_open_window (0, 0, 512, 512, 'black', WindowID) read_image (Image, 'particle') dev_display (Image) stop () threshold (Image, Large, 110, 255) dilation_circle (Large, LargeDilation, 7.5) dev_display (Image) dev_set_draw ('margin') dev_set_line_width (3) dev_set_color ('green') dev_display (LargeDilation) dev_set_draw ('fill') stop () complement (LargeDilation, NotLarge) reduce_domain (Image, NotLarge, ParticlesRed) mean_image (ParticlesRed, Mean, 31, 31) dyn_threshold (ParticlesRed, Mean, SmallRaw, 3, 'light') opening_circle (SmallRaw, Small, 2.5) connection (Small, SmallConnection) dev_display (Image) dev_set_colored (12) dev_display (SmallConnection) stop () dev_set_color ('green') dev_display (Image) dev_display (SmallConnection) Button := 1 while (Button == 1)dev_set_color ('green')get_mbutton (WindowID, Row, Column, Button)dev_display (Image)dev_display (SmallConnection)dev_set_color ('red')select_region_point (SmallConnection, SmallSingle, Row, Column)dev_display (SmallSingle)NumSingle := |SmallSingle|if (NumSingle == 1)intensity (SmallSingle, Image, MeanGray, DeviationGray)area_center (SmallSingle, Area, Row, Column)dev_set_color ('yellow')set_tposition (WindowID, Row, Column)write_string (WindowID, 'Area='+Area+', Int='+MeanGray)endif endwhile dev_set_line_width (1) dev_update_window ('on')

07. 附錄

7.1 機(jī)器視覺博客匯總
網(wǎng)址：https://dengjin.blog.csdn.net/article/details/116837497

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