HDevelop User's Manual

More documents

Recommendations

Info

86 CHAPTER 4. CODE GENERATION In this case ÚÐ is a ÐÓÒ variable and there is no multiplication available for the type ÐÓÒ in the class ÀÌÙÔÐ. So again we have to change the program slightly by adding the cast Operator: ÀÌÙÔÐ Ì½¸Ì¾ ÐÓÒ ÚÐ Ì½ Ì¾ ÀÌÙÔÐ´ÚÐµ 4.2 Code Generation for Visual Basic This section describes how to create a HALCON application in Visual Basic, starting from a program developed in HDevelop. HALCON can be used together with Visual Basic based on the COM interface of HALCON. A detailed description of this interface can be found in the HALCON/COM User’s Manual. 4.2.1 Basic Steps 4.2.1.1 Export The first step is to export the program using the menu Ð º ËÚ ×. Here, select the language (Î×ÙÐ ×) and save it to file. In UNIX you specify the file by giving it the corresponding extension, which is “º×”. The result is a new file with the given name and the extension “º×”. 4.2.1.2 The Visual Basic Template The exported file is intended to be used together with the predefined Visual Basic project that can be found in the directory ±ÀÄÇÆÊÇÇÌ±ÜÑÔÐ×ÚÀÚÐÓÔÌÑÔÐØ This project contains a form with a display window (ÀÏÒÓÛØÖÐ) and a button labeled ÊÙÒ. The file generated by HDevelop has to be added to this project. This is done by using the menu ÈÖÓØ º ÅÓÙÐ º Ü×ØÒ and selecting the file. Now the project is ready for execution: Run the project and then press the ÊÙÒ-button of the form which will call the exported code. 4.2.2 Program Structure The file created by HDevelop consists of the subroutine ÊÙÒÀÐÓÒ´µ which corresponds to the original program. In addition, another subroutine is created with the name ÁÒØÀÐÓÒ´µ. This subroutine applies the same initializations which HDevelop does. Most of the variables (iconic as well as control) are declared locally in the subroutine ÊÙÒÀÐÓÒ´µ. Iconic variables inside ÊÙÒÀÐÓÒ´µ belong to the class ÀÍÒØÝÔÇØ HDevelop / 2000-11-16
4.2. CODE GENERATION FOR VISUAL BASIC 87 and control variables belong to ÎÖÒØ. The subroutine ÊÙÒÀÐÓÒ´µ has a parameter ÏÒÓÛ whichisoftypeÀÏÒÓÛ. This is the link to the window in the panel where all output operations are passed to. Depending on the program, additional subroutines and variables are declared. 4.2.2.1 Array Assignment If a single value is assigned to a variant array, a special subroutine is called to ensure that the index is valid. If the array is to small it is resized. 4.2.2.2 Expressions All parameter expression inside HDevelop are translated into expressions based on the HAL- CON tuple operators. Therefore, an expression might look somewhat complex. In many cases these expressions can be changed to simple Visual Basic expressions, like ØÙÔÐ ×Ù becomes a simple subtraction. To ensure that the exported program has the same effect in Visual Basic this exchange is not applied automatically, because the semantic is not always identical. 4.2.2.3 Stop The HDevelop operator ×ØÓÔ is translated into a subroutine in Visual Basic which creates a message box. This message box causes the program to halt until the button is pressed. 4.2.2.4 Exit The HDevelop operator ÜØ is translated into the Visual Basic routine Ò. Because this routine has no parameter the parameters of ÜØ are suppressed. 4.2.2.5 Used Classes There are only six classes/types that are used: ÎÖÒØ for control parameters and ÀÍÒØÝÔÇØ for iconic data. In addition, there is the container class ÀÌÙÔÐ which comprises all operators of HALCON processing tuples, in this case the data type ÎÖÒØ. Then, there are the classes ÀÏÒÓÛØÖÐ and its low level content ÀÏÒÓÛ. ÀÏÒÓÛØÖÐ is used inside the project for the output window and a variable of class ÀÏÒÓÛ directs the output to this window. Finally, the class ÀÇÔÖØÓÖËØ is used as a container for all HALCON operators. There is no need for other classes as long as the program has the same functionality as in HDevelop. When editing a generated program you are free to use any of the classes of HALCON/COM to extend the functionality. 4.2.3 Limitations and Troubleshooting Besides the restrictions mentioned in this section and in section 4.4, please also check the description of the HDevelop operators on page 38. HALCON 6.0
Page 1 and 2:
HALCON Version 6.0 MVTec Software G
Page 3 and 4:
About This Manual This manual is a
Page 5 and 6:
Contents 1 Introducing HDevelop 1 1
Page 7 and 8:
Contents iii comment . . . . . . .
Page 9 and 10:
Chapter 1 Introducing HDevelop In f
Page 11 and 12:
1.2. EXAMPLE SESSION 3 Figure 1.1:
Page 13 and 14:
1.2. EXAMPLE SESSION 5 Figure 1.2:
Page 15 and 16:
1.3. ADDITIONAL SOURCES OF INFORMAT
Page 17 and 18:
Chapter 2 Graphical User Interface
Page 19 and 20:
2.3. MAIN WINDOW 11 Figure 2.1: The
Page 21 and 22:
2.3. MAIN WINDOW 13 A security chec
Page 23 and 24:
2.3. MAIN WINDOW 15 a directory whe
Page 25 and 26:
2.3. MAIN WINDOW 17 Figure 2.7: The
Page 27 and 28:
2.3. MAIN WINDOW 19 and not HDevelo
Page 29 and 30:
2.3. MAIN WINDOW 21 Figure 2.10: Ma
Page 31 and 32:
2.3. MAIN WINDOW 23 2.3.2.4 The Men
Page 33 and 34:
2.3. MAIN WINDOW 25 Figure 2.13: On
Page 35 and 36:
2.3. MAIN WINDOW 27 in a graphics w
Page 37 and 38:
2.3. MAIN WINDOW 29 Figure 2.16: On
Page 39 and 40:
2.3. MAIN WINDOW 31 Figure 2.17: Co
Page 41 and 42:
2.3. MAIN WINDOW 33 Figure 2.18: Se
Page 43 and 44: 2.3. MAIN WINDOW 35 Figure 2.20: Se
Page 45 and 46: 2.3. MAIN WINDOW 37 Figure 2.23: Ex
Page 47 and 48: 2.3. MAIN WINDOW 39 output paramete
Page 49 and 50: 2.3. MAIN WINDOW 41 is registered i
Page 51 and 52: 2.3. MAIN WINDOW 43 ËÙ×ØÓÒ×
Page 53 and 54: 2.3. MAIN WINDOW 45 ÏÒÓÛ º ×
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
Page 67 and 68: Chapter 3 Language The following ch
Page 69 and 70: 3.2. CONTROL TYPES AND CONSTANTS 61
Page 71 and 72: 3.4. OPERATIONS ON ICONIC OBJECTS 6
Page 73 and 74: 3.5. EXPRESSIONS FOR INPUT CONTROL
Page 85 and 86: 3.6. RESERVED WORDS 77 ÓÖ, ÜÓÖ
Page 87 and 88: 3.8. LIMITATIONS 79 In the followin
Page 89 and 90: Chapter 4 Code Generation The idea
Page 91 and 92: 4.1. CODE GENERATION FOR C++ 83 Ì
Page 93: 4.1. CODE GENERATION FOR C++ 85 tha
Page 97 and 98: 4.3. CODE GENERATION FOR C 89 4.3 C
Page 99 and 100: 4.4. GENERAL ASPECTS OF CODE GENERA
Page 101 and 102: Chapter 5 Program Examples This cha
Page 103 and 104: 5.2. CAPILLARY VESSEL 95 ÚÐÓ×Û
Page 105 and 106: 5.2. CAPILLARY VESSEL 97 Figure 5.3
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
Page 115 and 116: 5.7. DEVICES 107 Figure 5.13: Resis
Page 117 and 118: 5.8. CELL WALLS 109 Figure 5.15: Mi
Page 119 and 120: 5.10. EXCEPTION HANDLING 111 Figure
Page 121 and 122: 5.11. ROAD SCENE 113 any case. All
Page 123 and 124: 5.11. ROAD SCENE 115 tures. Hence a
Page 125 and 126: Chapter 6 Miscellaneous This chapte
Page 127 and 128: 6.5. RESTRICTIONS 119 Figure 6.1: E
Page 129 and 130: 2 APPENDIX A. CONTROL ÌÙÔÐ½
Page 131 and 132: 4 APPENDIX A. CONTROL Attention For
Page 133 and 134: 6 APPENDIX A. CONTROL Result retur
Page 135 and 136: 8 APPENDIX A. CONTROL ÚÙÔØÛÒ
Page 137 and 138: 10 APPENDIX A. CONTROL HDevelop / 2
Page 139 and 140: 12 APPENDIX B. DEVELOP Attention If
Page 141 and 142: 14 APPENDIX B. DEVELOP Ú ÓÔÒ Û
Page 143 and 144: 16 APPENDIX B. DEVELOP Ú Ò×ÔØ
Page 145 and 146:
18 APPENDIX B. DEVELOP Parallelizat
Page 147 and 148:
20 APPENDIX B. DEVELOP º ÀØ (inp
Page 149 and 150:
22 APPENDIX B. DEVELOP ’black’
Page 151 and 152:
24 APPENDIX B. DEVELOP Parameter º
Page 153 and 154:
26 APPENDIX B. DEVELOP Parameter º
Page 155 and 156:
28 APPENDIX B. DEVELOP If ÊÓÛ½
Page 157 and 158:
30 APPENDIX B. DEVELOP Ú ×Ø ÛÒ
Page 159 and 160:
32 APPENDIX B. DEVELOP Possible Suc
Page 161 and 162:
34 APPENDIX B. DEVELOP See Also Ú
Page 163 and 164:
36 APPENDIX B. DEVELOP HDevelop / 2
Page 165 and 166:
38 APPENDIX C. GLOSSARY Operator wi
Page 167 and 168:
40 Index Ú ×Ø ÔÖØ, 27, 39 Ú
Page 169 and 170:
42 Index Operator Data base, 37 Nam
Page 171:
44 Index HDevelop / 2000-11-16
show all

HDevelop User's Manual

Create successful ePaper yourself

Delete template?

Save as template?