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[Toon-members] Dynamic Matrix allocation in an iteration loop?
From: |
ETH |
Subject: |
[Toon-members] Dynamic Matrix allocation in an iteration loop? |
Date: |
Mon, 22 Mar 2010 18:25:45 +0100 |
Hello TooN Members
I have a simple question:
I have an iteration loop in which my matrix e.g A is always size dependend, for
example in one iteration its 9 x 3 in another its 9x16 and so on.
The problem facing TooN is that I always make new dynamical Matrices for this
purpose but this is probably stupid because I always allocate new memory in
each iteration?
Is there an efficient way to reduce allocation here? By a Matrix <...,...,
Reference>?
Or should I use Resizable Matrices?
Can someone help?
Thanks a lot!!
Am 20.03.2010 um 17:01 schrieb address@hidden:
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> Today's Topics:
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> 1. NEW(with code) : Implementation of BaseClass with virtual
> template functions with TOON (Gabriel N?tzi)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 19 Mar 2010 17:46:08 +0100
> From: Gabriel N?tzi <address@hidden>
> Subject: [Toon-members] NEW(with code) : Implementation of BaseClass
> with virtual template functions with TOON
> To: address@hidden
> Message-ID: <address@hidden>
> Content-Type: text/plain; charset="us-ascii"
>
> (Here again because source code was missing)
>
> Hello all,
>
> I have a basic question where I am completely stuck with TooN:
> I dont know how to realize this:
>
> I have a DynamicSystem Class which describes a Dynamical System with template
> parameter <int NDOF>
> I would like to have a Class Solver which has a reference to an instance of
> DynamicSystem.
> The solver should be able to call several virtual functions from
> DynamicSystem. (subClass could be a Ball or a Car or what ever :-))
> The main problem is that this main functions take Vectors/Matrices as Input
> and give Vector and Matrices as Output back (depending on NDOF)
> but when I want to properly define such a function in TOON i need templates
> (to be able to input also slices and so on....)
>
> like
>
> template<typename BaseM, typename BaseV>
> Matrix<3,3,double,BaseM> get_M (double t, Vector<3,double, BaseV > x ){
> // some code
> }
>
> But the problem is that in C++ we can not define templates as virtual
> functions......
> (SEE ATTACHED SIMPLE CODE!!)
>
> HOW DO I SOLVE this Problem with TooN?
> How should I structure my Classes? Would be very helpful if someone can
> quickly append the changes in the attached source code (ITS SIMPLE :-))!
>
> Thank you very much for your HELP!!
>
>
> =========================================CODE======================================================
>
>
>
> #include <iostream>
> #include <TooN/TooN.h>
>
> using namespace std;
> using namespace TooN;
>
> template<int NDOF>
> class DynamicSystem {
>
> public:
> DynamicSystem(){
> };
> ~DynamicSystem(){
> };
>
> virtual Matrix<NDOF,NDOF> get_M(double t, Vector<NDOF> x)=0;
>
> private:
> int ndof;
>
> };
>
> class WoodPecker : public DynamicSystem<3>{
> public:
> WoodPecker(){
> };
> ~WoodPecker(){
> };
>
> Matrix<3,3> get_M(double t, Vector<3> x){
> Matrix<3,3> A =Identity;
> return A;
> }
> };
>
> template<int NDOF>
> class Solver{
> public:
> Solver(DynamicSystem<NDOF> & myref): ref(myref) {
>
> };
> ~Solver(){
> };
> DynamicSystem<NDOF> & ref;
>
> void dosome(){
> Vector<> a(NDOF);
> cout << ref.get_M(0,a) <<endl; //works
> // cout << ref.get_M(0,a.slice<>(1,NDOF)) <<endl; // does not
> work..... (shit) :-)
> }
> };
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> End of Toon-members Digest, Vol 43, Issue 2
> *******************************************
- [Toon-members] Dynamic Matrix allocation in an iteration loop?,
ETH <=