[Sidefx-houdini-list] transformation follow rgb of image

herman herman02 at netvigator.com
Tue Dec 9 01:28:35 EST 2008


hi ben,

thanks for the advise. will give a try and let u know... althought i'm not 
familar with this new technique u mentioned.

cheers
herman

----- Original Message ----- 
From: "Ben Schrijvers" <ben.schrijvers at guerrilla-games.com>
To: <sidefx-houdini-list at sidefx.com>
Sent: Monday, December 08, 2008 5:30 PM
Subject: Re: [Sidefx-houdini-list] transformation follow rgb of image


>I would say keep trying with that pic() function.
> For start I would use $MAPU and $MAPV instead of $CEX and $CEY as that
> will give you only a single pixels color.
>
> Second... the enlightment bit... use a Gamma Cop node (probably value
> 2.2) to adjust the scale of your width or height.
>
> cheers,
> benS
>
>
> herman wrote:
>> hi all,
>>
>> this one is done by grasshopper, 
>> http://madeincalifornia.blogspot.com/2008/11/circlepattern05.html , i 
>> think houdini can also do the task by expression specifying the width and 
>> height of cylinder to follow the grey tone of the image.
>>
>> i remember in "procedural city"dvd, there was an expression- 
>> pic("/img/img1/blur2",$CEX,$CEY,D_CR)*0.6 to specify the transforming 
>> according to image created in img... i tried to apply the same principle 
>> but fail...
>>
>> wonder if any master here can give enlightment! or any previous example! 
>> thanks!
>>
>> cheers
>> herman
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