HDevelop User's Manual

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78 CHAPTER 3. LANGUAGE Ð× Another simple control structure is the condition with alternative. If the condition is true, all expressions and calls between the head and the word Ò are performed. If the condition is false the part between Ð× and Ò is executed. Note that the operator is called Ð× and it is displayed as in the program text area. ´ÓÒØÓÒµ ººº Ð× ººº Ò ÛÐ The ÛÐ loop has a boolean expression as the conditional part. As long as it is ØÖÙ, the body of the loop is performed. In order to enter the loop, the condition has to be true in the first place. ÛÐ ´ÓÒØÓÒµ ººº ÒÛÐ In chapter 5.3 you can find an example for using the ÛÐ loop. ÓÖ The ÓÖ loop is controlled by a start and termination value and an incrementation value that determines the number of loop steps. These values may also be expressions which are evaluated immediately before the loop is entered. The expressions may be of type ÒØÖ or of type ÖÐ. If all input values are of type ÒØÖ the loop variable will also be of type ÒØÖ. In all other cases the loop variable will be of type ÖÐ. If the start value is less or equal to the termination value, the starting value is assigned to the loop index and the body of the loop is entered. If the increment is less than zero the loop is entered if the start value is larger or equal to the end value. Each time the body is executed, the loop index is incremented by the incrementation value. If the loop index is equal to the termination value, the body of the loop is performed for the last time. If the loop index is larger than the termination value the body will not be excecuted any longer. 3 Please note, that the loop index does not need to become equal to the termination value in order terminate the loop. The loop index is set to the termination value when the loop is being left. Please note, that the expressions for start and termination value are evaluated only once when entering the loop. A modification of a variable that appears within these expressions has no influence on the termination of the loop. The same applies to the modifications of the loop index. It also has no influence on the termination. The loop value is assigned to the correct value each time the ÓÖ operator is executed. For more details, see section 4.4.2 on the code generation of ÓÖ loops. If the ÓÖ loop is left too early (e.g., if you press ËØÓÔ and set the È) and the loop is entered again, the expressions will be evaluated, as if the loop were entered for the first time. ÓÖ ÐÓÓÔ ÚÐÙ ËØÖØ ØÓ Ò Ý ÁÒÖÑÒØ ººº ÒÓÖ 3 For negative increment values the loop is terminated if the loop index is less than the termination value. HDevelop / 2000-11-16
3.8. LIMITATIONS 79 In the following example the sine from 0 up to 6 is computed and printed in to the graphical window (filename: ×ÒºÚ): ÓÐÜ ¼ ÓÐÝ ¼ Ú×ØÓÐÓÖ ´³Ö³µ Ú×ØÔÖØ´¼¸ ¼¸ ½½¸ ½½µ ÓÖ Ü ½ ØÓ ½½ Ý ½ Ý ×Ò´Ü » ½½º¼ ¾ ¿º½½ ¿µ ¾ ×ÔÐÒ ´ÏÒÓÛÁ¸ ¹ÓÐÝ·¾¸ ÓÐÜ¸ ¹Ý·¾¸ Üµ ÓÐÜ Ü ÓÐÝ Ý ÒÓÖ In this example the assumption is made that the window is of size 512¢512. The drawing is always done from the most recently evaluated point to the current point. Further examples on how to use the ÓÖ loop can be found in chapter 5.8 and 5.9. ×ØÓÔ The ×ØÓÔ construct stops the program after the operator is executed. The program can be continued by pressing the ËØÔ or ÊÙÒ button. ÜØ The ÜØ construct terminates the session of HDevelop. 3.8 Limitations This section summarizes the restritions of the HDevelop language: ¯ Maximum number of objects per parameter : 100000 ¯ Maximum length of strings : 1024 characters ¯ Maximum length of a variable name : 256 characters ¯ Maximum length of a tuple : 1000000 The general restrictions of the HALCON operators can be found in the manual Getting Started with HALCON. HALCON 6.0
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HALCON Version 6.0 MVTec Software G
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About This Manual This manual is a
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Contents 1 Introducing HDevelop 1 1
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Contents iii comment . . . . . . .
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Chapter 1 Introducing HDevelop In f
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1.2. EXAMPLE SESSION 3 Figure 1.1:
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1.3. ADDITIONAL SOURCES OF INFORMAT
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Chapter 2 Graphical User Interface
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2.3. MAIN WINDOW 11 Figure 2.1: The
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2.3. MAIN WINDOW 13 A security chec
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2.3. MAIN WINDOW 15 a directory whe
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2.3. MAIN WINDOW 17 Figure 2.7: The
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2.3. MAIN WINDOW 19 and not HDevelo
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2.3. MAIN WINDOW 21 Figure 2.10: Ma
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2.3. MAIN WINDOW 23 2.3.2.4 The Men
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2.3. MAIN WINDOW 25 Figure 2.13: On
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Page 51 and 52: 2.3. MAIN WINDOW 43 ËÙ×ØÓÒ×
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Page 55 and 56: 2.3. MAIN WINDOW 47 Figure 2.31: Th
Page 57 and 58: 2.5. OPERATOR WINDOW 49 The program
Page 59 and 60: 2.5. OPERATOR WINDOW 51 Please refe
Page 61 and 62: 2.6. VARIABLE WINDOW 53 operator ha
Page 63 and 64: 2.6. VARIABLE WINDOW 55 aspect rati
Page 65 and 66: 2.7. GRAPHICS WINDOW 57 Figure 2.38
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Page 91 and 92: 4.1. CODE GENERATION FOR C++ 83 Ì
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Page 103 and 104: 5.2. CAPILLARY VESSEL 95 ÚÐÓ×Û
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Page 107 and 108: 5.3. PARTICLES 99 each. Now it is e
Page 109 and 110: 5.4. ANNUAL RINGS 101 ÚÐÖÛÒÓ
Page 111 and 112: 5.5. BONDING 103 Figure 5.9: Exampl
Page 113 and 114: 5.7. DEVICES 105 Figure 5.11: Calib
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Page 117 and 118: 5.8. CELL WALLS 109 Figure 5.15: Mi
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Page 121 and 122: 5.11. ROAD SCENE 113 any case. All
Page 123 and 124: 5.11. ROAD SCENE 115 tures. Hence a
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10 APPENDIX A. CONTROL HDevelop / 2
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12 APPENDIX B. DEVELOP Attention If
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14 APPENDIX B. DEVELOP Ú ÓÔÒ Û
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16 APPENDIX B. DEVELOP Ú Ò×ÔØ
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18 APPENDIX B. DEVELOP Parallelizat
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20 APPENDIX B. DEVELOP º ÀØ (inp
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22 APPENDIX B. DEVELOP ’black’
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24 APPENDIX B. DEVELOP Parameter º
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26 APPENDIX B. DEVELOP Parameter º
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28 APPENDIX B. DEVELOP If ÊÓÛ½
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30 APPENDIX B. DEVELOP Ú ×Ø ÛÒ
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32 APPENDIX B. DEVELOP Possible Suc
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34 APPENDIX B. DEVELOP See Also Ú
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36 APPENDIX B. DEVELOP HDevelop / 2
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38 APPENDIX C. GLOSSARY Operator wi
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40 Index Ú ×Ø ÔÖØ, 27, 39 Ú
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42 Index Operator Data base, 37 Nam
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44 Index HDevelop / 2000-11-16
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HDevelop User's Manual

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