# Noise Functions

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On 05/06/2010 at 11:49, xxxxxxxx wrote:

that was fast. you replied while i was editing

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On 05/06/2010 at 11:54, xxxxxxxx wrote:

So someting like this?

points[i] = Mix(points[i] * turb, points[i], .5);

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On 05/06/2010 at 11:58, xxxxxxxx wrote:

exactly

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On 05/06/2010 at 12:04, xxxxxxxx wrote:

hmm. still getting some pretty funky results..   could it be because I am looping through all of the points and effecting each individual point?  is it possible to compare the result of a variable in one cycle of a loop to the result in the last cycle of a loop?

~Shawn

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On 05/06/2010 at 12:13, xxxxxxxx wrote:

I assume I'll need a global variable for that..   do you think it would be more effective to catch the location of the last point that was modified in the global variable  and use that to adjust the position of the next point. make the mix function mix the distance between the last point and the current point?

something like that?

~Shawn

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On 05/06/2010 at 12:14, xxxxxxxx wrote:

you could try to use some smaller value for the noise functions. for example point _/100.. and see what happens. i'd use a slider for this value than, too...

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On 05/06/2010 at 12:21, xxxxxxxx wrote:

ha, you are just too fast for my replies. however, i wouldnt care for that.. you have your base form and apply just some values to each point, so the form still stays similar to your original mesh. maybe you dont use a cube as a base, but a sphere with low polycount? maybe you apply some scale vector additionally so the object doesnt look so round anymore

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On 05/06/2010 at 12:22, xxxxxxxx wrote:

well smaller numbers definitely help but still don't quite give me what I'm looking for.  I think I might need to compare the current point position with the last point position..     Maybe.,.    LOL

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On 05/06/2010 at 12:23, xxxxxxxx wrote:

lol...   sorry I replied before you had a chance to again.  HAHA

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On 05/06/2010 at 12:30, xxxxxxxx wrote:

if you use Mix with keeping more to your original point, say values between 0.5 and 1 for t, you should be able to get exactly that (in theory of course, since i'm not actually trying atm)

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On 05/06/2010 at 12:37, xxxxxxxx wrote:

LOL..  yep you're right...   it worked/./   just had to do a little tweaking with the numbers..  Thanks a lot for your help ello.    I really appreciate you taking the time to help me.

~Shawn

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On 05/06/2010 at 12:39, xxxxxxxx wrote:

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On 05/06/2010 at 12:45, xxxxxxxx wrote:

Hey while you're here do you know if it is safe to subdivide an object from within the GetVirtualObjects() method?

~Shawn

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On 05/06/2010 at 12:53, xxxxxxxx wrote:

i place my object inside  a hypernurbs (Osds) to do so, but i think you mean something other. it should be able by using CommandData

here is a snippet of how i used the optimize command on a polygon object.

if (op->GetType()==Opolygon)
{
ModelingCommandData cd;
cd.doc = doc;
cd.op = op;
BaseContainer bc;
bc.SetReal(MDATA_OPTIMIZE_TOLERANCE, tolerance);
bc.SetReal(MDATA_OPTIMIZE_POINTS, TRUE);
bc.SetReal(MDATA_OPTIMIZE_POLYGONS, TRUE);
bc.SetReal(MDATA_OPTIMIZE_UNUSEDPOINTS, TRUE);
cd.bc = &bc;
if(SendModelingCommand(MCOMMAND_OPTIMIZE, cd))
{
cd.op->Message(MSG_UPDATE, NULL);
BaseTag *phongTag = op->MakeTag(Tphong);
BaseContainer *bc = phongTag->GetDataInstance();
bc->SetBool(PHONGTAG_PHONG_ANGLELIMIT,TRUE);
} else {
GePrint("failed");
}
}

hope this makes sense

edit: in your case it'd be the MCOMMAND_SUBDIVIDE .. check the sdk for its parameters...

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On 05/06/2010 at 12:59, xxxxxxxx wrote:

I was doing something simliar with

#### MCOMMAND_SUBDIVIDE_<_h4_>_

but for some reason it keeps crashiung on me when I try to do it.

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On 05/06/2010 at 13:01, xxxxxxxx wrote:

hm.. did you set the parameters? i guess its some trial and error now, since i dont know why it crashes.

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On 05/06/2010 at 13:03, xxxxxxxx wrote:

this is how I am attempting to subdivide

but it keeps crashing

if (mdat.bc->GetBool(HYPERNURBS_SUBDIVISION, TRUE))  //If HyperNURBS is checked
{
mdat.bc->SetBool(MDATA_SUBDIVIDE_HYPER, TRUE);
}
else
{
mdat.bc->SetBool(MDATA_SUBDIVIDE_HYPER, FALSE);
}
mdat.bc->SetLong(MDATA_SUBDIVIDE_SUB, subAmount);
mdat.bc->SetReal(MDATA_SUBDIVIDE_ANGLE, mdat.bc->GetReal(MAX_ANGLE));

//Subdivision Command
SendModelingCommand(MCOMMAND_SUBDIVIDE, mdat);

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On 05/06/2010 at 13:04, xxxxxxxx wrote:

MAX_ANGLE is equal to pi   and subAMount is a real that the user can adjust.

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On 05/06/2010 at 13:11, xxxxxxxx wrote:

try catching the crash with

if(SendModelingCommand(MCOMMAND_SUBDIVIDE, mdat))
{
GePrint("done");
}
else
{
GePrint("failed");
}

just to be on the safe side..

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On 05/06/2010 at 13:44, xxxxxxxx wrote:

Here's my subdivision code now...

Still crashing.

//SUBDIVISION

Real subAmount;
subAmount = mcd2.bc->GetLong(SPACEROCK_SUBDIVISIONS);
mcd2.mode = MODIFY_ALL;
mcd2.doc = hh->GetDocument();

if(SendModelingCommand(MCOMMAND_SUBDIVIDE, mcd2))
{
GePrint("done");
mcd2.bc->SetBool(MDATA_SUBDIVIDE_HYPER, TRUE);
mcd2.bc->SetLong(MDATA_SUBDIVIDE_SUB, subAmount);
mcd2.bc->SetReal(MDATA_SUBDIVIDE_ANGLE, pi);
//Subdivision Command
SendModelingCommand(MCOMMAND_SUBDIVIDE, mcd2);
}
else
{
GePrint("failed");
}

Any thoughts?