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Technical Discussion » An interesting vex question between new and old sops in houdini

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carldrifter
66 posts
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 2017年11月24日 21:53:31
cool!thanks a again,tamte. What you mentioned really enlighten me!
For a more specific question: I can use rand(@ptnum)>0.5 to delete point in delete sop but I cannot use it in blast sop. Therefore,I have to use wrangle sop to use if statment and removepoints()function to do the same thing.
Do I have more convinient ways to do it use vex in the new sop? which new sop can provide the same function?
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Technical Discussion » An interesting vex question between new and old sops in houdini

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carldrifter
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 2017年11月24日 09:47:55
Great infos!
But it strikes me with anohter question: the old sops like delete sop can never use vex language? we put @ syntax but we acctually use hscript instead of vex?
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Technical Discussion » An interesting vex question between new and old sops in houdini

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carldrifter
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 2017年11月24日 08:43:44
Thanks tamte!
That's to say I cannot judge the language by the @ symbol but by the sop where I use it~ rand(@ptnum) could be a hscript when I use it in the delete SOP!
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Technical Discussion » An interesting vex question between new and old sops in houdini

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carldrifter
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 2017年11月24日 06:43:52
Hi ndickson,

Thanks very much for your reply.I assumed that way too but I have one more question. As you said, when we use rand($PT) in delete sop, we use hscript,but what about rand(@ptnum)in delete sop? Is that considered to be hscript or vex? I would consider it as vex because the @ptnum signal.Therefore what casue the differences between rand(@ptnum) in delete sop and new group sop in houdini 16
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Technical Discussion » An interesting vex question between new and old sops in houdini

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carldrifter
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 2017年11月24日 06:43:49
Hi ndickson,

Thanks very much for your reply.I assumed that way too but I have one more question. As you said, when we use rand($PT) in delete sop, we use hscript,but what about rand(@ptnum)in delete sop? Is that considered to be hscript or vex? I would consider it as vex because the @ptnum signal.Therefore what casue the differences between rand(@ptnum) in delete sop and new group sop in houdini 16
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Technical Discussion » An interesting vex question between new and old sops in houdini

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carldrifter
66 posts
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 2017年11月20日 00:05:12
Hi,

I have founded that when you use delete sop by entering the expression rand(@ptnum)or rand($PT),you get the same result.However,when you use wrangle for the same expression,you get a different result?
Can anyone explain why this hanppened?

besides,when you use the “old” sop(such as delete sop),you can use @Cd.r but in new blast sop,you can only use @Cd.x instead of @Cd.r.Why?
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