C / C++ / MFC

Useage about OPCODE collision detection

4-Jun-13 18:46

Hi,

Thanks for the reply.

I have done the progress bar stop and continue.....but now Issue is with Timer. I am able to stop the timer when user presses the Pause button........Next when user presses the Play button, the timer is not updated.....it remains at that position only.

I have again started the timer when user presses Play button, but it does not increment, it remains at the position where it was stopped.

Any idea how to update the timer with the Pause and Play buttons.

Regards,
Mbatra

Henry Hong2-Jun-13 22:30

2-Jun-13 22:30

Hi,
I want to know whether opcode can give me the messages besides triangle. As mesh which is defined in the opcode is consist of triangles, but most of my model is constructed using polygons, so before my collision qurey, I have to transform the polygons to triangles, but i want to know wether i could know which polygon the triangles detected are belong to. if the anwser is yes, how can i get the message?

Richard MacCutchan2-Jun-13 23:17

Richard MacCutchan

2-Jun-13 23:17

Henry Hong wrote:
how can i get the message?

How indeed! Perhaps you could start by explaining exactly what C/C++ problem you are trying to solve.

Use the best guess

Henry Hong3-Jun-13 15:55

3-Jun-13 15:55

Hello, as i want to use the OPCODE to perform collision detection,but according to the user manual, i can only get the vertex and normals that overlapped,so i want to know wether i can get the message about which polygon the vertex belong to. because that will be a important reason for me to decide wether use the OPCODE to perform my collision detection.

Richard MacCutchan3-Jun-13 20:52

Richard MacCutchan

3-Jun-13 20:52

Henry Hong wrote:
i want to use the OPCODE to perform collision detection

When I asked you to explain what your problem is I expected something more than a repeat of your original question. What do you mean by "OPCODE" and where is this collision detection supposed to take place?

Use the best guess

Henry Hong3-Jun-13 22:15

3-Jun-13 22:15

OPCODE is developed for collision detection in computer graphics, do you have the experience on it. And as I have no, and I am surveying about which manners can meet my request.

Richard MacCutchan3-Jun-13 22:22

Richard MacCutchan

3-Jun-13 22:22

See http://www.codercorner.com/Opcode.htm[^].

Use the best guess

Henry Hong3-Jun-13 22:35

3-Jun-13 22:35

I had got the resource from this address, and i also have read the mannual about the OPCODE, but as I want to learn some details about the OPCODE, I found it was difficult. And i had got the two projects "opcode" and "CDTestFramework" from that address. because i had not found the information about how to get which polygon the detected triangle is belong to in the user mannual. i hoped to find my anwser in the two projects above, but I find it was difficult to read the code in the two projects. if you had some experience about using OPCODE, i really wished you could give some suggestion about how to read the two projects. And as one of my request is two get the polygons, so if you know, can you tell me is there any manners i can get the polygons. If the answer is NO, i think I have to think about take us of other detection manners.

Thanks and Best Wishes.

image processing toolkits | batch image processing

C^hris L^osinger4-Jun-13 4:05

C^hris L^osinger

4-Jun-13 4:05

you might get better results if you ask this in the Algorithms or Graphics forums. this is a C/C++ forum, and your question doesn't seem to have anything to do with C/C++.

How to conditional call a library

thanh_bkhn2-Jun-13 19:00

2-Jun-13 19:00

Hi all,
I have a program that calls magnification.lib in windows 7, windows 8.
(I'm calling #include magnification.h)
But we know this library doesn't exist in windows XP.
How can I ignore this library when opening the application in windows XP?

«_Superman_»2-Jun-13 20:35

«_Superman_»

2-Jun-13 20:35

Create function pointers in a header file for all the magnification APIs that you're going to use.
Check the OS version and if Vista or above, call LoadLibrary on Magnification.dll.
After this call GetProcAddress on the function to initialize the function pointer.

So the header file could look like this -

typedef BOOL (*PFN_MAG_INITIALIZE)(void);

From the main program, you could have a call to some function called InitMagnification.

In the InitMagnification function, do the dynamic loading after checking the OS version.

PFN_MAG_INITIALIZE MagInitialize = NULL;

if (osVersion >= "VISTA")   // Consider this as pseudo-code
{
    HMODULE hmod = LoadLibrary(_T("Magnification.dll"));

    MagInitialize = GetProcAddress(hmod, "MagInitialize");
}

In the source where this function is called, do the checking as follows -

if (MagInitialize)
{
    MagInitalize();
}

I have omitted error checking, which you have to do.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++) (October 2009 - September 2013)

Polymorphism in C

thanh_bkhn3-Jun-13 16:05

3-Jun-13 16:05

Thank you very much. After posting this question, I did exactly what you told me to do. Thank you again

David Crow3-Jun-13 2:54

3-Jun-13 2:54

thanh_bkhn wrote:

But we know this library doesn't exist in windows XP.
How can I ignore this library when opening the application in windows XP?

Sounds like you need to read up on implicit vs. explicit linking.

thanh_bkhn3-Jun-13 16:06

3-Jun-13 16:06

Thank you. I performed an explicitly link to my DLL.

chaau3-Jun-13 18:28

chaau

3-Jun-13 18:28

As an alternative, you could use delay load dll. In this case you do not need to change the code you have already written (related to statically linking to the library), all you need to do is just do not call chunk of codes related to magnification at all. Saves you a lot of annoying LoadLibrary/GetProcAddress calls.

However, it looks like you have already implemented it. So, just learn about this, so that you could use in future

thanh_bkhn3-Jun-13 20:32

How to mute soundin a audio / video file using directshow mfc.?

3-Jun-13 20:32

Thank you for introducing me this.
I found this way is more interesting than using LoadLibrary, but I still prefer to the old method, because it helps me to compile the program even on Windows XP

mbatra311-Jun-13 1:16

Re: How to mute soundin a audio / video file using directshow mfc.?

1-Jun-13 1:16

Hi,

I am using DirectShow to play, pause audio / video files. Now I want to implement mute functionality for any audio / video file. Is this possible using DirectShow or I have to use any other method.?

I want to make sound off from a currently playing video file, When user clicks on the sound button, audio should not be heard.

Any help will be appreciated.

Regards,
Mbatra

David Crow1-Jun-13 7:20

Re: How to mute soundin a audio / video file using directshow mfc.?

1-Jun-13 7:20

So do you want to pause the playing of the audio file, or just mute the speakers (while the audio file continues to play)?

mbatra312-Jun-13 18:56

Re: How to mute soundin a audio / video file using directshow mfc.?

2-Jun-13 18:56

Hi,

I just want to mute the speakers while audio file continues to play.

Similar to mute functionality, don't want to pause the audio file. it should continue playing while we mute the sound from the speakers.

Regards,
Mbatra

David Crow3-Jun-13 2:52

How to disable a property page in a property sheet in mfc.?

3-Jun-13 2:52

See here.

mbatra3131-May-13 23:11

Re: How to disable a property page in a property sheet in mfc.?

31-May-13 23:11

Hi,

I have created a property sheet and it contains 3 pages. I want to disable any of the page based on some condition.

Is there any method of disabling pages in a property sheet.?

Any help will be appreciated.

Regards,
Mbatra

jeron11-Jun-13 6:33

jeron1

1-Jun-13 6:33

Can't you use the EnableWindow(BOOL) method? Supplying TRUE to enable and FALSE to disable. See here[^]

Re: How to disable a property page in a property sheet in mfc.?

David Crow1-Jun-13 7:20