[Sidefx-houdini-list] Hi

Bloomer, Justin Douglas jdb130130 at email.tamu.edu
Wed Feb 3 21:01:09 EST 2016


To debug, I guess you are referring to see what value it is using. If that
is the case the simply click on the channel that you made the expression
in. For example, if you did a centroid expression on the translate Y, then
simply click the word translate on the left.

On Wed, Feb 3, 2016 at 6:51 PM, Crest Christopher <
crestchristopher at gmail.com> wrote:

> Elizabeth, I'm already watching an introduction to Houdini, so far so
> good, is there a particular video in Kim Goossens videos that I should
> watch that relates to centroids ?
>
> My second question relates to how you can debug that D_YMIN evaluates to
> either 0,1 or 2 or any of the other D_efine expressions ?
>
> When I mentioned it makes sense, I meant, it makes sense that it does
> evaluate to 0, or 1 or 2 as mentioned by Michael, but how do you debug this
> evaluation !
>
>
> Elizabeth Stephens wrote:
>
>> I'm not sure what you're asking in your second question, but centroid
>> centers one node to another on a specific axis. So if you had a line, on
>> the Y axis and you wanted a sphere to stay in the center no matter how
>> long
>> your line in the sphere's y origin you would type:
>>
>> centroid("../line",D_Y)
>>
>> Have you watched any of the beginner tutorials?
>> I found taking the time to go through them very beneficial in learning
>> little things like these.
>>
>> May I suggest:
>>
>>
>> https://www.youtube.com/watch?v=VTNrT-sAVu0&list=PLShEm1_z6_cyBOAKQSH2ck-enGSnovMjD
>>
>> You can learn a lot from Kim Goossens videos!
>>
>> On Wed, Feb 3, 2016 at 6:05 PM, Crest Christopher<
>> crestchristopher at gmail.com>  wrote:
>>
>> I believe you, that D_ stands for define as it makes most sense ;-)
>>>
>>> I'm going to sometimes have stupid questions in my posts so that is a
>>> warning for everyone on the list, if it's too stupid let me know if it's
>>> average stupid well when the question arises you'll know.
>>>
>>> How do I use a Centroid ? How do you debug that D_YMIN etc evaluate to
>>> 0,1,2; although it makes sense ?
>>>
>>>
>>>
>>>
>>> Michael Dunkley wrote:
>>>
>>> *I could be very wrong about this* but I believe that the D_ is
>>>> actually shorthand for "define," as they effectively operate as
>>>> Houdini-wide C / C++ style #defines.  All of the D_ words ultimately
>>>> evaluate as integers by the time the function uses it.  That is to
>>>> say, these two are identical:
>>>>
>>>> centroid("../path",D_X)<--- D_X will evaluate as zero
>>>> centroid("../path",0)
>>>>
>>>> In the case of the bbox function (for instance), its easier to use the
>>>> defines as its often tough to know which integer stands for which
>>>> functionality.  Centroid is a little easier to use w/ just numbers -
>>>> D_X, D_Y, D_Z are the only options and evaluate to 0,1,2 respectively.
>>>> That said, technically speaking i think you could also use D_XMIN,
>>>> D_YMIN, and D_ZMIN in leiu of these, as they also evaluate to 0,1,2.
>>>> Confusing, I know.
>>>>
>>>> You can test any of this by entering any of the D_'s into a normal
>>>> number box and clicking it to see what it evaluates to.
>>>>
>>>> All of this said, I completely agree with Francois' sentiment that its
>>>> probably better to just learn then conventions and let their necessity
>>>> become clearer as time goes on.  Houdini, for the most part, is very
>>>> logically consistent, and a lot of the one-off and seemingly
>>>> inconsistent stuff you have to learn up front (like these defines and
>>>> local variables) are often more the exception than the rule for
>>>> day-to-day Houdini use.
>>>>
>>>> Mike
>>>>
>>>>
>>>> On Wed, Feb 3, 2016 at 6:05 PM, François Duchesneau<sidefx at trinix.ca>
>>>> wrote:
>>>>
>>>> No, you won't be able to add attachment here. You'll have to use the
>>>>> forum
>>>>> for that.
>>>>>
>>>>> Good thing you thought about it though, every now and then somebody
>>>>> tries it
>>>>> and he doesn't understand why the file didn't get through :)
>>>>>
>>>>> Francois
>>>>>
>>>>>
>>>>> On 02/03/2016 06:03 PM, Crest Christopher wrote:
>>>>>
>>>>> I was a little curious, if anyone knows to peak it !
>>>>>>
>>>>>> Can I send Houdini files in this list ?
>>>>>>
>>>>>> I think I've said my Hello's to everyone and to the Houdini Team
>>>>>> unless
>>>>>> they are busy with Houdini.
>>>>>>
>>>>>>
>>>>>> François Duchesneau wrote:
>>>>>>
>>>>>> To be honest you can just take for granted what's the convention in
>>>>>>> the
>>>>>>> doc and apply it in your expressions. I don't think it'll bring you
>>>>>>> much
>>>>>>> Houdini knowledge knowing the history of why they named it this way
>>>>>>> rather
>>>>>>> than something else, unless of course you're just curious.
>>>>>>>
>>>>>>> In other words there's no logic that when you use D_ followed by
>>>>>>> something else you can query other type of information, it's just
>>>>>>> expressions they've made to help you find the bounding box max, min
>>>>>>> or
>>>>>>> centroid etc.
>>>>>>>
>>>>>>> Francois
>>>>>>>
>>>>>>> On 02/03/2016 04:43 PM, Crest Christopher wrote:
>>>>>>>
>>>>>>> Dimensions, in other words, Dimensions of the bounding box to the
>>>>>>>> yMin ?
>>>>>>>> How does Houdini know what is the yMin and yMax etc ?
>>>>>>>>
>>>>>>>> Matt Estela wrote:
>>>>>>>>
>>>>>>>> dimension(s) maybe?
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On 4 February 2016 at 05:56, Crest
>>>>>>>>> Christopher<crestchristopher at gmail.com>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>> Hi, Everyone. ;-)
>>>>>>>>>
>>>>>>>>>> My first question for the list as there will be many is; what do
>>>>>>>>>> D_
>>>>>>>>>> stand
>>>>>>>>>> for when using D_YMIN ?
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Olivier Jeannel wrote:
>>>>>>>>>>
>>>>>>>>>> Hi there !
>>>>>>>>>>
>>>>>>>>>>> On Wed, Feb 3, 2016 at 7:47 PM, Gary Jaeger<gary at corestudio.com>
>>>>>>>>>>> wrote:
>>>>>>>>>>>
>>>>>>>>>>> yeah, me too :)
>>>>>>>>>>>
>>>>>>>>>>> Gary Jaeger // Core Studio
>>>>>>>>>>>> 249 Princeton Avenue
>>>>>>>>>>>> Half Moon Bay, CA 94019
>>>>>>>>>>>> 650.728.7957 (direct)
>>>>>>>>>>>> 650.728.7060 (main)
>>>>>>>>>>>> http://corestudio.com<http://corestudio.com/>
>>>>>>>>>>>>
>>>>>>>>>>>> On Feb 3, 2016, at 10:44 AM, Crest Christopher<
>>>>>>>>>>>>
>>>>>>>>>>>>> crestchristopher at gmail.com>     wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>> Hello Houdini List :-)
>>>>>>>>>>>>
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