[Insight-developers] mesh data structure problem.

[Ting Chen]

Hi! I have tried to add the memory allocation code before I do anything to
the pointcontainer, but I still cannot get the correct answer,
and by the way, did you try to add that piece of code into itkMeshTest and
run it?
ting
-----Original Message-----
From: Luis Ibanez <ibanez@cs.unc.edu>
To: Ting Chen <chenting@graphics.cis.upenn.edu>
Cc: Insight toolkit <Insight-developers@public.kitware.com>
Date: Thursday, March 01, 2001 8:17 AM
Subject: Re: [Insight-developers] mesh data structure problem.


>Hi Ting,
>
>my mistake, I should have said:
>
>    point.Value() = p;
>
>for the iterator,
>intead of :
>
>     point.Value( p )
>
>In any case, that will only help you
>with the speed of access.
>
>I think that the real problem in you
>code could be the allocation.
>Did you add a line like:
>
>   GetPoints()->Reserve( 1000 );
>
>before starting to get access to the
>points ?
>
>This line will allocate a number of
>points (1000 in this case ) for you.
>
>
>Hope that helps,
>
>Luis
>
>
>----------------------------------------
>
>On Wed, 28 Feb 2001, Ting Chen wrote:
>
>> but point.value take no parameter and just return the value stored at the
>> location, any other suggestion?
>>
>> >
>> >PointsContainerPointer      myPoints = GetPoints();
>> >PointsContainer::Iterator   point    = myPoints->Begin();
>> >PointType p;
>> >p = 0,0,0;
>> >while(  point != myPoints->End() )
>> >{
>> >    point.Value( p );
>> >    ++point;
>> >}
>> >
>> >
>> >
>> >Luis
>> >
>> >
>> >-----------------------------------------------------------------------
>> >
>> >Ting Chen wrote:
>> >
>> >> I write the following code in my itkDeformableMesh class:
>> >>
>> >> ....
>> >>   float ds[3], d[3]={0, 0, 0};
>> >>   SetPoint(1, (PointType)d);
>> >>   GetPoint(1, (PointType*)ds);
>> >> ....
>> >>
>> >> but I found out that ds={-1.074e+008, 0, 0} after the operation.
>> >>
>> >> if I do
>> >> ....
>> >>   float ds[3], d[3]={0, 0, 0};
>> >>   SetPoint(0, (PointType)d);
>> >>   GetPoint(0, (PointType*)ds);
>> >> ....
>> >>
>> >> ds = {-1.074e+008, -1.074e+008, -1.074e+008}
>> >>
>> >> it seems the first element in the container has problems here. what is
>> the
>> >> problem here?
>> >> thanks
>> >> ting
>> >>
>> >> _______________________________________________
>> >> Insight-developers mailing list
>> >> Insight-developers@public.kitware.com
>> >> http://public.kitware.com/mailman/listinfo/insight-developers
>> >
>> >--
>> >______________________________________________________________________
>> >
>> >Luis Ibanez
>> >Research Assistant Professor - Division of Neurosurgery
>> >University of North Carolina at Chapel Hill
>> >CB# 7060, Chapel Hill, NC 27599
>> >email : ibanez@cs.unc.edu       home  : http://www.cs.unc.edu/~ibanez
>> >phone : (919)-843-9961          fax   : (919)-966-6627
>> >______________________________________________________________________
>>
>>
>
>--
>-----------------------------------------------------------
>Luis Ibanez
>Research Assistant Professor - Division of NeuroSurgery
>University of North Carolina at Chapel Hill
>Chapel Hill, NC, 27599   http://www.cs.unc.edu/~ibanez
>------------------------------------------------------------
>
>
>
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