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Hello,
Im not sure about Vb but in a c# project you need tick the "Enable unmanaged code debugging" option in the debug section of the project properties. Im sure its something similar
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This did it - thanx muchly!
~ Mike
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The codes that I have written so far is below:
// Simulation of the Dynamics of a 2-Link Pan-Tilt Robotic Manipulator
/* This programme calculates the Velocity, Acceleration and the angles of inclination
of the two links of the Spherical Pointing Motor, which is essentially a Two-Link Robotic
Manipulator*/
//#include <basis.h>
//#include <assert.h>
//#include <string.h>
//#include <iostream.h>
//#include <iomanip.h>
//#include <fstream.h>
// Precompiler Directives
#include <math.h>
#include <stdlib.h>
// Constants Declaration
#define n (int) 2
#define m1 (float) 0.05
#define m2 (float) 0.03
#define r1 (float) 0.04
#define r2 (float) 0.06
#define ra (float) 0.04
#define rb (float) 0.06
#define l (float) 0.05
#define d (float) 0.02
#define acc_due_gravity (float) 9.81
class AngVel1
{
public:
};
class AngAccln1
{
public:
};
class AngVel2
{
public:
};
class AngAccln2
{
public:
}
/*
n = Number of Links = 2
m1 = Mass of the First Link (The Annulus)
m2 = Mass of the Second Link
r1 = Inner Radius of Link 1 (The Annulus)
r2 = Outer Radius of Link 1 (The Annulus)
ra = Outer Radius of the Annulus
rb = Inner Radius of the Annulus
l = Half the Lenght of Link 1
d = Displacement from the Centre of Mass
g = Acceleration due to gravity = 9.81
t = time in seconds
*/
// Declaration of variables (Robot Parameters)
float t;
// Prototypes
float TorqueVal(float t);
double Runge_Kutta ();
double AngVel1 (double om1){
return om1;
}
double AngAccln1 (double t, double om1, double tetha1, double tetha2){
t = 0.1;
return (tau1 - 2*m2(r2*r2/4 -h2*h2/3 -d*d) * om1*om2*sintetha2*costetha2 - m2*g*d*costetha1*costetha2)/
om1*(m1(ra*ra + rb*rb)/4 + m1(h1*h1)/3 + m2((r2*r2)(1+sinsqtetha2)/4 + m2*h2*h2*cossqtetha2/3 + m2*d*d*cossqtetha2);
}
double AngVel2 (double om2){
return om2;
}
double AngAccln2 (double t, double om1, double om2, double tetha1, double tetha2){
t=0.4;
return (tau2 + (m2(r2*r2/4 -h2*h2/3 -d*d)*om1*om1*sintetha2*costetha2) - m2*g*d*sintetha1*sintetha2)/
om2*m2(r2*r2/4 + h2*h2/3 + d*d;
double RK(double y){
double k1,k2,k3,k4;
k1=h*fn(y);
k2=h*fn(y+(k1/2.0));
k3=h*fn(y+(k2/2.0));
k4=h*fn(y+k3);
return y+(k1/6.0)+(k2/3.0)+(k3/3.0)+(k4/6.0);
}
// The Main Routine
int main()
{
// Torque Function
float TorqueVal1(float t)
{
t = 0.1;
return t;
}
// Runge-Kutta Function
double RK(double y){
double k1,k2,k3,k4;
k1=h*fn(y);
k2=h*fn(y+(k1/2.0));
k3=h*fn(y+(k2/2.0));
k4=h*fn(y+k3);
return y+(k1/6.0)+(k2/3.0)+(k3/3.0)+(k4/6.0);
}
double RK(double l){
double v1,v2,v3,v4;
v1=h*fn(l);
v2=h*fn(l+(k1/2.0));
v3=h*fn(l+(k2/2.0));
v4=h*fn(l+k3);
return l+(v1/6.0)+(v2/3.0)+(v3/3.0)+(v4/6.0);
}
}
i am attempting to simulate the dynamics of a 2-link pan-tilt robot. Two second order ODE were generated. As a requirement of the Runge-Kutta, each of the two second-order ODE was converted to 2 first order ODE thereby making four equations in all.
I was not using a class before and I just started packing the four equation into classes.
For further explanation or clarification, please, mail me to olaskg@yahoo.ie.
Thank you.
skg
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1 - check the Ignore HTML tags when you post code
2 - when posting C++ code, don't use the managed C++ forum, use the visual c++ one
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Hello,
I am trying to import a function from fortran and using it in a windows form.
I export the function like always:
MODULE FORTRANMOD<br />
PUBLIC DllFortranTest<br />
CONTAINS<br />
INTEGER FUNCTION DllFortranTest<br />
!DEC$ ATTRIBUTES DLLEXPORT::DllFortranTest<br />
...<br />
END FUNCTION DllFortranTest<br />
<br />
END MODULE FORTRANMOD
and I import the funcion in C like always also
__declspec (dllimport) int FORTRANMOD_mp_DLLFORTRANTEST();
But when I'm going to use it:
int i = FORTRANMOD_mp_DLLFORTRANTEST();
I get the following errors linking:
1>FortranForm1.obj : error LNK2031: unable to generate p/invoke for "extern "C" int __clrcall FORTRANMOD_mp_DLLFORTRANTEST(void)" (?FORTRANMOD_mp_DLLFORTRANTEST@@$$J0YMHXZ); calling convention missing in metadata
1>FortranForm1.obj : error LNK2028: unresolved token (0A000006) "extern "C" int __clrcall FORTRANMOD_mp_DLLFORTRANTEST(void)" (?FORTRANMOD_mp_DLLFORTRANTEST@@$$J0YMHXZ) referenced in function "private: void __clrcall ConFortran::Form1::ComunicacionFortran(void)" (?ComunicacionFortran@Form1@ConFortran@@$$FA$AAMXXZ)
1>FortranForm1.obj : error LNK2019: unresolved external symbol "extern "C" int __clrcall FORTRANMOD_mp_DLLFORTRANTEST(void)" (?FORTRANMOD_mp_DLLFORTRANTEST@@$$J0YMHXZ) referenced in function "private: void __clrcall ConFortran::Form1::ComunicacionFortran(void)" (?ComunicacionFortran@Form1@ConFortran@@$$FA$AAMXXZ)
I have also try to use:
using namespace System::Runtime::InteropServices;
and
[DllImport("dllfortranTest.dll")]<br />
static int DllFortranTest();
But I get the exception:
An unhandled exception of type 'System.EntryPointNotFoundException' occurred in ConFortran.exe<br />
<br />
Additional information: Unable to find an entry point named 'DllFortranTest' in DLL 'dllfortranTest.dll'.
Can somebody help me about the importation way of work???
Best regards
-- modified at 7:08 Wednesday 18th October, 2006
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Hi guys
I have been working on a project for several months now and it is almost finished all i need is some kind of security so that only the people that buy my software will be able to run it although when they first run it, it will display a key(which is their hardware drive serials, encrypted though) and then they will need to send that code to me so that i decrypt the data and send them a key that will work(any kind of key, for ex. when they send their key to me then i will use another proggy that i make and use that proggy to maybe add something to their serial like a few digits or a code at the end of their serial then send it back to them) what i need to know though is how to encrypt their hardware drive serial then make an algorith that can recognize the modified serial(that i will send to them once they send their serial to me) and make the program start up. I also need some kind of limit maker so that someone can only use it for a limited amount of time(1 year lets say) then after the time has expired it will display a message box saying they have to renew their serial.
Soething of this kind would be really good.
So could someone please direct me to such a tut or maybe reply with some useful info?
Thanks in advance
Cyclone
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Do you need these things in managed C++, or are you in the wrong forum ?
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Hi all,
Anyone familiar with ms RTC Client API?
Got the following issue:
- initialize the client with InitializeEx(RTCIF_DISABLE_MEDIA); (call it client A)
- login with other account to office communicator
- from office comm, send a message to client A
Office communicator complains about not being able to send the message.
I tried replying with IRTCSession2->AnswerWithSessionDescription() but didn't work either.
Discover beauty in whatever you're doing
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Looks to me like you want the Visual C++, not the managed C++ forum ?
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Yes,
It's Visual C++.
Thanks
Discover beauty in whatever you're doing
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I recommend asking in the right forum then 
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Yeah,
I created a similar message in the "Visual C++/MFC" forum
Cristi
Discover beauty in whatever you're doing
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Hi,
I am busy searching, but I'm not sure, what I need to "register" all methods of the main program class, build a console host for that app and:
1. make it posible for the console host to autocomplete the method name when the user types the beginning of the method name and presses [tab]?
2. have one invoking point for all methods, passing the method name as a string parameter - something like
RunMethod(System::String methodName). Should I use attributes? Delegates?
Any hints appreciated.
Thanks,
nj
-- modified at 5:53 Tuesday 17th October, 2006
(added to title)
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I want to convert "abcd" into ASCII code
but I met a strange problem. My code is below.
<br />
char *s="abcd";<br />
int br[100];<br />
for(int i=0;i<4;i++)<br />
{<br />
br[i]=__toascii(s[i]);<br />
cout << br[i] << "\n";<br />
}<br />
string kkb=""; <br />
kkb=kkb.insert(0,br[1].ToString());<br />
cout << kkb;<br />
and there is an error at kkb=kkb.insert(0,br[1].ToString());
error C2664: 'std::basic_string<_Elem,_Traits,_Ax> &std::basic_string<_Elem,_Traits,_Ax>::insert(__w64 unsigned int,const std::basic_string<_Elem,_Traits,_Ax> &)' : cant convert argument 2 from 'System::String ^' to 'const std::basic_string<_Elem,_Traits,_Ax> &'a
It's very strange that I change the code
kkb=kkb.insert(0,br[1].ToString());
into
kkb=kkb.insert(0,"a string");
then it works.
I dont understand that both them are string.
why as long as I put the string variable int the function, it has an error?
Can somebody help me?
Thanks a lot.
minihotto
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I'd recommend using sprintf or ( better ) ostringstream to do this. That would also make all your code C++, instead of the one reference to the .NET libraries.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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hello everybody !!
my new problem is that i have a class that contain a some functions and some variables
i want to execute one of these functions in a separate thread using AfxBeginThread(...);
and FYI this function uses some member variables of the class to do it's work
any idea ???
thnx 4 ur time and concern
a.hemdan
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This is a Visual C++ question, not a managed C++ question. Ask in the right forum, and you'll get lots of help./
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Hi,
I want to obtain the pixel value of any pixel on the form (dialog) during mouse move.
In MFC, i can get the pixel value using
CDC *pDC = this->GetDC();<br />
COLORREF clr = pDC->GetPixel(x,y);
ReleaseDC(pDC);
How do i do the same using managed C++.
I added an event OnMouseMove, and i can get the pixel coordinate using
e->X and e->Y;
How do i get the pixel value? I tried this
Graphics ^g = this->CreateGraphics();
then i do not know what else to do...
Usman
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You can still use the old code in managed C++, it's still C++.
In GDI+, the graphics object doesn't offer a get pixel method, the Bitmap class does instead. I'm not sure how to get a bitmap that represents the current screen, without doing a screen capture ( by which time, you've had the screen in a DC and could have just called GetPixel )
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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I need to get the pixel value each time the mouse is moved. Taking a full screen capture will be slow. Thus, as you have suggested, i used the unmanaged C++ code. It works, but what i'm afraid of is that the transition to and from unmanaged code will cause performance degradation. That's why i needed a pure managed solution. Anyway, since there is no managed way of doing it, i'm using the unmanaged way;
Graphics ^g = this->CreateGraphics();<br />
System::IntPtr p = g->GetHdc();<br />
HDC hdc = (HDC) p.ToPointer();<br />
<br />
COLORREF clr = GetPixel(hdc,x,y);
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Oh, thanks by the way
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I have 2 pairs of ODE that resulted from the mathematical modelling of a 2-link robotic system. My problem is in setting the intial conditions and printing to files.
I could have attached the equations but they are not showing when I tried to copy and paste.
Anyone interested in helping me out could send me his/her email and i will send the equation with other information to him/her. I will really appreciate your assistance.
Thank you.
Regards,
Sahoong.
skg
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If you click 'Ignore HTML tags', you can paste equations without any hassles.
But, this looks like it might be a C++ and not managed C++ question.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Dear Chris,
Million thanks for your response.
Unfortunately, I still cannot paste the equation. It was typed with Microsoft equation editor.
The codes that I have written so far is below:
// Simulation of the Dynamics of a 2-Link Pan-Tilt Robotic Manipulator
/* This programme calculates the Velocity, Acceleration and the angles of inclination
of the two links of the Spherical Pointing Motor, which is essentially a Two-Link Robotic
Manipulator*/
//#include <basis.h>
//#include <assert.h>
//#include <string.h>
//#include <iostream.h>
//#include <iomanip.h>
//#include <fstream.h>
// Precompiler Directives
#include <math.h>
#include <stdlib.h>
// Constants Declaration
#define n (int) 2
#define m1 (float) 0.05
#define m2 (float) 0.03
#define r1 (float) 0.04
#define r2 (float) 0.06
#define ra (float) 0.04
#define rb (float) 0.06
#define l (float) 0.05
#define d (float) 0.02
#define acc_due_gravity (float) 9.81
class AngVel1
{
public:
};
class AngAccln1
{
public:
};
class AngVel2
{
public:
};
class AngAccln2
{
public:
}
/*
n = Number of Links = 2
m1 = Mass of the First Link (The Annulus)
m2 = Mass of the Second Link
r1 = Inner Radius of Link 1 (The Annulus)
r2 = Outer Radius of Link 1 (The Annulus)
ra = Outer Radius of the Annulus
rb = Inner Radius of the Annulus
l = Half the Lenght of Link 1
d = Displacement from the Centre of Mass
g = Acceleration due to gravity = 9.81
t = time in seconds
*/
// Declaration of variables (Robot Parameters)
float t;
// Prototypes
float TorqueVal(float t);
double Runge_Kutta ();
double AngVel1 (double om1){
return om1;
}
double AngAccln1 (double t, double om1, double tetha1, double tetha2){
t = 0.1;
return (tau1 - 2*m2(r2*r2/4 -h2*h2/3 -d*d) * om1*om2*sintetha2*costetha2 - m2*g*d*costetha1*costetha2)/
om1*(m1(ra*ra + rb*rb)/4 + m1(h1*h1)/3 + m2((r2*r2)(1+sinsqtetha2)/4 + m2*h2*h2*cossqtetha2/3 + m2*d*d*cossqtetha2);
}
double AngVel2 (double om2){
return om2;
}
double AngAccln2 (double t, double om1, double om2, double tetha1, double tetha2){
t=0.4;
return (tau2 + (m2(r2*r2/4 -h2*h2/3 -d*d)*om1*om1*sintetha2*costetha2) - m2*g*d*sintetha1*sintetha2)/
om2*m2(r2*r2/4 + h2*h2/3 + d*d;
double RK(double y){
double k1,k2,k3,k4;
k1=h*fn(y);
k2=h*fn(y+(k1/2.0));
k3=h*fn(y+(k2/2.0));
k4=h*fn(y+k3);
return y+(k1/6.0)+(k2/3.0)+(k3/3.0)+(k4/6.0);
}
// The Main Routine
int main()
{
// Torque Function
float TorqueVal1(float t)
{
t = 0.1;
return t;
}
// Runge-Kutta Function
double RK(double y){
double k1,k2,k3,k4;
k1=h*fn(y);
k2=h*fn(y+(k1/2.0));
k3=h*fn(y+(k2/2.0));
k4=h*fn(y+k3);
return y+(k1/6.0)+(k2/3.0)+(k3/3.0)+(k4/6.0);
}
double RK(double l){
double v1,v2,v3,v4;
v1=h*fn(l);
v2=h*fn(l+(k1/2.0));
v3=h*fn(l+(k2/2.0));
v4=h*fn(l+k3);
return l+(v1/6.0)+(v2/3.0)+(v3/3.0)+(v4/6.0);
}
}
I was not using a class before and I just started packing the four equation into classes.
You could me to olaskg@yahoo.ie.
Thank you.
skg
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I'm trying to develop a WM visualization but i cannot seem to to find any examples or tutorials on the subject. I have the wm sdk and have read the documentation, but the example in it is far from impressive. Any help would be great.
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