1 Scripting

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Scripting With Hscript and the c-shellRunning this script would give you the error: frame - Undefined variable Inorder to correct this you prepend a "\" to any variables you are manipulating (allthose variable names that you would put a '$' in front of). The above example wouldbe corrected as follows:hscript
Scripting With Hscript and the c-shell4. Type opscript > . If the driver name is calledmantra1 and the Þlename you want to save to is called /usr/tmp/driver.cmd thentype: opscript mantra1 > /usr/tmp/friver.cmdSAMPLE OUTPUTS FROM OPSCRIPTThe following output was generated with the opscript command:opscript mantra1 > /usr/tmp/driver.cmd :1: # Node mantra12: opadd -n mantra mantra13: oplocate -x 0 -y 0 mantra14: opparm mantra1 execute ( 0 ) trange ( on ) f ( 1 150 1 ) \5: renderer ( Mantra2 ) camera ( cam1 ) visible ( * ) tscript ( off ) \6: script ( /usr/tmp/test.cmd ) binary ( off ) picture ( ‘$HIP/$F.pic’ ) \7: dof ( on ) jitter ( 1 ) dither ( 0.004 ) gamma ( 1 ) sample ( 3 3 ) \8: field ( frame ) blur ( deform ) tres ( on ) res ( 320 243) \9: resmenu ( “640 486 1.0” ) aspect ( 1 ) command ( ‘mantra3’ )10: opset -d off -r off -t off -l off -s off -u off -c off -C off -p off mantra111: opcf /outLines 4-9 specify parameters for the ouput driver mantra1. Normally they wouldappear as one line but have been formatted on multiple lines here for the sake of legiblity.To use this information in a script, you would remove lines 3, 10, and 11, (these arenot necessary unless you are importing it into the graphical version of Houdini)leaving you with:1: # Node mantra12: opadd -n mantra mantra14: opparm mantra1 execute ( 0 ) trange ( on ) f ( 1 150 1 ) \5: renderer ( Mantra2 ) camera ( cam1 ) visible ( * ) tscript ( off ) \6: script ( /usr/tmp/test.cmd ) binary ( off ) picture ( ‘$HIP/$F.pic’ ) \7: dof ( on ) jitter ( 1 ) dither ( 0.004 ) gamma ( 1 ) sample ( 3 3 ) \8: field ( frame ) blur ( deform ) tres ( on ) res ( 320 243) \9: resmenu ( “640 486 1.0” ) aspect ( 1 ) command ( ‘mantra3’ )This fragment adds an output driver called mantra1 which tells hscript to renderusing mantra. It then uses the opparm parameter to set the requisite parameters.At Þrst glance, the number of parameters used with the opparm command seemscumbersome. In many cases, you might want to use default settings and just tweakone or two parameters. For example, assume that the only thing you want to changefrom the defaults is the size of the output image. To accomplish this, your scriptfragment might look like the following:opadd -n mantra mantra1opparm tres ( on ) res (640 480 )In this case you are overriding the default resolution with tres ( on ) and specifyingthe custom resolution with res (640 480 ). To use this in a Þle you could do twothings:1. Copy these lines into your C shell script (the approach used thus far), or;2. Reference this Þle in the C shell using the source command.12 - Scripting 1 95
Page 1 and 2: 1 ScriptingThis section covers Houd
Page 3 and 4: The Scripting Language2 THE SCRIPTI
Page 5 and 6: The Scripting LanguageExpression ev
Page 7 and 8: The Scripting LanguageEXAMPLEYou ca
Page 9 and 10: The Scripting LanguageSHIFT COMMAND
Page 11 and 12: 3 SCRIPTING WITH HSCRIPT AND THE C-
Page 13 and 14: Scripting With Hscript and the c-sh
Page 15: Scripting With Hscript and the c-sh
Page 27 and 28: Scripting Tricks4 SCRIPTING TRICKS4
Page 29 and 30: Intrinsic Commands2 ScriptingComman
Page 31 and 32: Intrinsic Commands1.4 CONTINUESYNTA
Page 33 and 34: Intrinsic CommandsDisplays the onli
Page 35 and 36: Intrinsic Commands> endcam1, geo1,
Page 37 and 38: Intrinsic Commands1.20 PROMPTSYNTAX
Page 39 and 40: Intrinsic Commands1.26 SETSYNTAXset
Page 41 and 42: Intrinsic Commands1.29 SOURCESYNTAX
Page 43 and 44: Intrinsic Commandsecho $iendoutput:
Page 45 and 46: Plug-In Commands3 PLUG-IN COMMANDST
Page 47 and 48: Channel and Operator Commands4.2 BO
Page 49 and 50: Channel and Operator CommandsAdds c
Page 51 and 52: Channel and Operator CommandsRemove
Page 53 and 54: Channel and Operator CommandsUsage
Page 55 and 56: Channel and Operator CommandsThis c
Page 57 and 58: Channel and Operator CommandsWarnin
Page 59 and 60: Channel and Operator Commands4.26 M
Page 61 and 62: Channel and Operator CommandsIf no
Page 63 and 64: Channel and Operator Commands4.33 O
Page 65 and 66: Channel and Operator CommandsThe -e
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Channel and Operator Commands-r Ren
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Channel and Operator Commandsremove
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EXAMPLEoplocate geo2This command pr
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Channel and Operator CommandsWhen u
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Channel and Operator CommandsEXPLAN
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Channel and Operator Commandsinputs
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Commands to Manage Time Groups5.3 T
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Operator-Specific Commands6 OPERATO
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Operator-Specific CommandsEXPLANATI
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Time Related CommandsEXPLANATIONSet
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Interface Related Commands8 INTERFA
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Interface Related CommandsEXPLANATI
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Interface Related CommandsEXAMPLESc
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to be bound, delimited by a colon.S
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Interface Related Commands8.14 OMUN
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Interface Related CommandsDetermine
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Interface Related Commands8.20 OMSW
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Interface Related CommandsEXAMPLESp
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Interface Related CommandsFor Files
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Interface Related Commandswirehidde
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Interface Related Commandsviewdispl
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Interface Related Commands8.33 VIEW
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Creating a Script from Houdini3 Use
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Creating a Script from Houdini1.3 M
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Environments2 ENVIRONMENTS2.1 THE D
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Environments2.6 EDITING HIP SCRIPTS
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Creation ScriptsCREATION OF AN OBJE
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Dialog ScriptsWhen Houdini reads a
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Dialog ScriptstypesThe type may be
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Dialog Scripts4.5 SPECIFYING GROUPS
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mands5 RMANDSSYNTAXrmands [options]
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Tcl / Tk Scripting6 TCL / TK SCRIPT
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Tcl / Tk Scripting## mainlineset pi
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Introduction4 EnvironmentVariables1
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Environment VariablesHOUDINI_BACKUP
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Environment VariablesSESI_A60_HOSTS
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Environment VariablesUT_INTERRUPT_T
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Environment Variables2.9 BACKWARDS
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Environment Variables$HIP/vex/Surfa
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