VEX constants for type limits and common math values
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- DougRichardson
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- bonsak
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Take a look at $HFS/houdini/vex/include/math.h" You can include math.h in vex like this: Then those definitions will be available in your code. etc.
You can also make you own definitions and include them when needed. Make a file “mystuff.h” and use #define to set your own constants like this, and place the file in YOURPREFSDIR/vex/include/mystuff.h.
To use it in vex put #include <mystuff.h> in your vex code.
-b
#include <math.h>
f@debug = M_TOLERANCE
You can also make you own definitions and include them when needed. Make a file “mystuff.h” and use #define to set your own constants like this
#define VERYSMALLNUMBER 0.00000000000000001
To use it in vex put #include <mystuff.h> in your vex code.
-b
Edited by bonsak - March 30, 2019 05:38:03
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- DougRichardson
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bonsak
include math.h in vex like this
Perfect! I didn't realize you could include files in VEX because I was only reading the VEX language reference [www.sidefx.com]. The documentation on includes is in the VCC compiler reference [www.sidefx.com].
In addition two the two include locations you mentioned ($HFS and YOURPREFSDIR), you can also place files in $JOB/vex/include.
I also noticed that I was able to use the defines from math.h without having to include it in my VEXpression in the Attribute Wrangler. I dove into the Attribute Wrangle node, and then right clicked on the Attribute VOP inside and selected VEX/VOP Options > View VEX Code and discovered math.h is already included. Here's the boilerplate:
// // VEX Code Generated by Houdini 17.5.173 // Date: Sun Mar 31 12:48:29 2019 // File: E:/code/HoudiniExamples/vex // Node: /obj/geo1/attribwrangle1/attribvop1 // #ifndef VOP_OP #define VOP_OP #endif #ifndef VOP_CVEX #define VOP_CVEX #endif #pragma opname attribvop1 #pragma oplabel "Local Vop Code" #pragma opmininputs 1 #pragma opmaxinputs 1 #include <math.h> void _obj_geo1_attribwrangle1_attribvop1_snippet1() { // The VEXpression parameter from the Attribute Wrangle node is inserted here! } cvex obj_geo1_attribwrangle1_attribvop1() { // Code produced by: snippet1 _obj_geo1_attribwrangle1_attribvop1_snippet1(); }
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- bonsak
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