Re: How can I have OpenGL in MFC SDI and Dialog at the same time - Graphics Discussion Boards

Hi, is there a tool allowing to replace easily a certain color in a 24bit texture with transparent black for the use with DirectX3D 9? The image should be saved with precomputed alpha values (32bit), so that there is no need for using colorkey while loading the textures.

Hello,

I'm a high-school student seeking to learn about 3D programming. I have experience with C# and C++, OOP and more.

I don't have any intentions of making high-grade stuff with 3D, but I do want to learn something that I might use in the future. So I have a few questions:

1)Is the 3D options in WPF can replace DirectX/XNA? Can they all accomplish the same?
2)Is XNA a standard for future game development? Do you see programmers moving from DirectX to XNA?
3)What do you think that a beginner should be learning? Yet I don't want to learn for example using XNA if I'll probably forget it in a year because I'll be using DirectX for example. (I'm just trying to be time-efficient - I'm not lazy).
4)A book recommendation would be appriciated if you see fit Smile | :)

Thank you all Smile | :)

Hi,

I would suggest you to visit the following links to know the difference between WPF, DIRECTX and XNA.

http://forums.xna.com/forums/t/5278.aspx[^]

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=257213&SiteID=1[^]

Hope this helps Smile | :)

Regards,
John Adams
ComponentOne LLC

Thanks

- I should have googled better.

At least you googled before.

Deja View - the feeling that you've seen this post before.

My blog | My articles

Hi all (thank you for help) I have a program in VS 6.0 c++ that have to have a SDI and a Dialog at the same time with OpenGL. I now how to have OpenGL in a SDI, but when I add a dialog with OpenGL my program crash. I manage from http://www.codeproject.com/KB/docview/dynviews.aspx?display=PrintAll to use his class COpenGLView to draw OpenGL in my SDI and in a Dialog. The problem is when I click inside the OpenGL in the dialog I got "Debug Assertion Failed! ... File: viewcore.cpp Line: 249 ...". I pasted the code were I am creating the Dialog_OpenGL were:
CListBox m_contloLst;
If you can help me to solve the problem with my code.Or if you have an example of a code that has OpenGL in SDI and in a Dialog at the same time, that will help as well.
Thank you for your time. Guillermo

BOOL CAboutDlg::OnInitDialog()
{
CDialog::OnInitDialog();

// TODO: Add extra initialization here
CMyView* m_pNewView;
CRect clientRect;
m_pNewView = new COpenGLView();
m_contloLst.GetClientRect(&clientRect);
if(! m_pNewView->Create(NULL, NULL, WS_VISIBLE | WS_CHILD, clientRect,
&m_contloLst, 4584958/*idNewView*/))
{
TRACE( "Failed view creation\n" );
}

return TRUE; // return TRUE unless you set the focus to a control
// EXCEPTION: OCX Property Pages should return FALSE
}

PS: I tried in other program to use http://www.ddj.com/cpp/184403581;jsessionid=3WVDT5FITQ4OUQSNDLOSKHSCJUNN2JVN?_requestid=88041 but when I compiled with VS 6.0 C++ was not working.

Not seeing all the code, I suspect the problem is that the COpenGLView is made to be hosted in a CFrameWnd and NOT a CDialog. You need to have a CWnd derived class to add to the CDialog and treat it like any other control window item.

If you don't have the data, you're just another a**hole with an opinion.

Hi thank you very much for your help. I manage to run OpenGL in My dialog, as you told me Smile | :)

.
This is running ok in the SDI (I checked and on mouse move, mouse click is ok, is entering to the functions). But In the dialog, only mouse move works, mouse click is not working (he is not entering to the functions). When I do click inside the dialog I get
" Debug Assertion Failed
File:viewcore.cpp
Line: 249
"
Any help will be really good. Thank you again
This is how I add it to the dialog

BOOL CAboutDlg::OnInitDialog() 
{ CDialog::OnInitDialog();
  // TODO: Add extra initialization here
 CRect rect;

  // Get size and position of the picture control
  GetDlgItem(IDC_OPENGL)->GetWindowRect(rect);
  z0Lv_openGL = new COpenGLView();
  // Convert screen coordinates to client coordinates
  ScreenToClient(rect);

  // Create OpenGL Control window
  z0Lv_openGL->oglCreate(rect, this);

  return TRUE; 
}

This is my is COpenGLView.h

/////////////////////////////////////////////////////////////////////////////
// COpenGLView view

#include 
#include "MyView.h"

// This view encapsulates a personalized 3D view
class COpenGLView : public CView
{
public:
	COpenGLView();           // protected constructor used by dynamic creation
	virtual ~COpenGLView();


  /*MEMBER oglCreate_________________________________________________________*/
  void oglCreate(CRect rect, CWnd *parent);

protected:
	DECLARE_DYNCREATE(COpenGLView)

// Attributes
protected:
	CDC*			m_pDC;
	HGLRC			m_hRC;
	GLUquadricObj*	m_quadric;

	double			m_rotation[3];

// Operations
public:

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(COpenGLView)
	protected:
	virtual void OnDraw(CDC* pDC);      // overridden to draw this view
	virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
	//}}AFX_VIRTUAL

// Implementation
protected:
#ifdef _DEBUG
	virtual void AssertValid() const;
	virtual void Dump(CDumpContext& dc) const;
#endif

	// Generated message map functions
protected:
	void SetupPixelFormat();
	void InitGL();
	//{{AFX_MSG(COpenGLView)
	afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
	afx_msg BOOL OnEraseBkgnd(CDC* pDC);
	afx_msg void OnDestroy();
	afx_msg void OnSize(UINT nType, int cx, int cy);
	afx_msg void OnTimer(UINT nIDEvent);
	afx_msg void OnMouseMove(UINT nFlags, CPoint point);
	afx_msg void OnLButtonDblClk(UINT nFlags, CPoint point);
	afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
	afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

My COpenGLView.cpp

/////////////////////////////////////////////////////////////////////////////
// COpenGLView

IMPLEMENT_DYNCREATE(COpenGLView, CView)

COpenGLView::COpenGLView()
{
}

COpenGLView::~COpenGLView()
{
}


BEGIN_MESSAGE_MAP(COpenGLView, CView)
	//{{AFX_MSG_MAP(COpenGLView)
	ON_WM_CREATE()
	ON_WM_ERASEBKGND()
	ON_WM_DESTROY()
	ON_WM_SIZE()
	ON_WM_TIMER()
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONDBLCLK()
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// COpenGLView drawing

void COpenGLView::OnDraw(CDC* pDC)
{static double dLv_d=0.5;
  dLv_d =dLv_d+1.0;
	wglMakeCurrent(m_pDC->GetSafeHdc(), m_hRC);

	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

	//glLoadIdentity();

	glRotated(m_rotation[0], 1.0, 0.0, 0.0);
	glRotated(m_rotation[1], 0.0, 1.0, 0.0);
	glRotated(m_rotation[2], 0.0, 0.0, 1.0);

	glPushMatrix();

	glColor3f(1.0f, 0.1f, 0.5f);
	gluCylinder(m_quadric, 1.0, 1.0, 1.0, 16, 16);
	gluDisk(m_quadric, 0.0, 1.0, 16, 1);
	glTranslated(dLv_d, 0.0, 1.0);
	gluDisk(m_quadric, 0.0, 1.0, 16, 1);

	glPopMatrix();
	
	SwapBuffers(m_pDC->GetSafeHdc());
}

/////////////////////////////////////////////////////////////////////////////
// COpenGLView diagnostics

#ifdef _DEBUG
void COpenGLView::AssertValid() const
{
	CView::AssertValid();
}

void COpenGLView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// COpenGLView message handlers

int COpenGLView::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CView::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	InitGL();
	
	return 0;
}

BOOL COpenGLView::PreCreateWindow(CREATESTRUCT& cs) 
{
	cs.style |= WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
	
	return CView::PreCreateWindow(cs);
}

void COpenGLView::InitGL()
{ 
	m_pDC = new CClientDC(this);
	
	SetupPixelFormat();

	m_hRC = wglCreateContext(m_pDC->GetSafeHdc());

	wglMakeCurrent(m_pDC->GetSafeHdc(), m_hRC);

	glClearColor(0.0f, 0.0f, 0.5f, 0.0f);
	glEnable(GL_DEPTH_TEST);
	glEnable(GL_LIGHTING);
	
	glEnable(GL_LIGHT0);
	
	GLfloat color[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
	GLfloat lightPos[4] = {3.0f, 3.0f, 3.0f, 1.0f };

	glLightfv(GL_LIGHT0, GL_AMBIENT, color);
	glLightfv(GL_LIGHT0, GL_DIFFUSE, color);
	glLightfv(GL_LIGHT0, GL_SPECULAR, color);
	glLightfv(GL_LIGHT0, GL_POSITION, lightPos);

	m_quadric = gluNewQuadric();

	for(int i=0; i<3; i++) {
		m_rotation[i] = (((double) rand() / (double) RAND_MAX) * 2.0) - 1.0;
	}

	//SetTimer(m_idView, 10, NULL);
}

void COpenGLView::SetupPixelFormat()
{
	PIXELFORMATDESCRIPTOR pfd =
	{
		sizeof(PIXELFORMATDESCRIPTOR),
		1,
		PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,
		PFD_TYPE_RGBA,
		24,
		0, 0, 0, 0, 0, 0,
		0,
		0,
		0,
		0, 0, 0, 0,
		16,
		0,
		0,
		PFD_MAIN_PLANE,
		0,
		0, 0, 0,
	};

	int pixelformat = ChoosePixelFormat(m_pDC->GetSafeHdc(), &pfd);
	SetPixelFormat(m_pDC->GetSafeHdc(), pixelformat, &pfd);
}

BOOL COpenGLView::OnEraseBkgnd(CDC* pDC) 
{
	return TRUE;
}


void COpenGLView::OnDestroy() 
{
	wglMakeCurrent(NULL, NULL);
	wglDeleteContext(m_hRC);
	if(m_pDC) delete m_pDC;

	gluDeleteQuadric(m_quadric);

	CView::OnDestroy();
}

void COpenGLView::OnSize(UINT nType, int cx, int cy) 
{
	CView::OnSize(nType, cx, cy);
	
	wglMakeCurrent(m_pDC->GetSafeHdc(), m_hRC);
	glViewport(0, 0, cx, cy);

	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluPerspective(45.0, (double) cx / (double) cy, 0.1, 1000.0);

	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	gluLookAt(0.0, 0.0, 3.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
}

void COpenGLView::OnTimer(UINT nIDEvent) 
{
	Invalidate();
	
	CView::OnTimer(nIDEvent);
}



/*MEMBER oglCreate_________________________________________________________*/
void COpenGLView::oglCreate(CRect rect, CWnd *parent)
{
   CString className = AfxRegisterWndClass(CS_HREDRAW |
      CS_VREDRAW | CS_OWNDC, NULL,
      (HBRUSH)GetStockObject(BLACK_BRUSH), NULL);

   CreateEx(0, className, "OpenGL", WS_CHILD | WS_VISIBLE |
            WS_CLIPSIBLINGS | WS_CLIPCHILDREN, rect, parent, 0);

   // Set initial variables' values
   //m_oldWindow    = rect;
   //m_originalRect = rect;

   //hWnd = parent;
}


void COpenGLView::OnMouseMove(UINT nFlags, CPoint point) 
{
		Invalidate();
	

	CView::OnMouseMove(nFlags, point);
}


void COpenGLView::OnLButtonDblClk(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	
	CView::OnLButtonDblClk(nFlags, point);
}

void COpenGLView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	
	CView::OnLButtonDown(nFlags, point);
}

void COpenGLView::OnLButtonUp(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	
	CView::OnLButtonUp(nFlags, point);
}

I think you need to look at the differences in how CFrameWnd and CDialog route messages their children. Or at least see how to get a child window hooked into the CDialog routing. It's been a while since I've looked at the MFC source and I'm not sure I could stomach it now. Laugh | :laugh:

If you don't have the data, you're just another a**hole with an opinion.

Thank you I was trying [^] and with this and this http://www.codeproject.com/KB/docview/dynviews.aspx?display=PrintAll[^]I manage to do it. Thank you again for your help. Good luck with your codes Laugh | :laugh:

Hi,

I have got a big topographical jpg file that I want to display in a form on a picturebox in its real coordinates that ranges X from 50 000 to 75 000 and Y from 2 800 000 to 2 825 000. this will make it very easy for me to get the mouse coords in real coords as the user invokes the Mousedown event. It will also make it easier for me to draw real features in its real coordinates.

I have got the code:

Image image = Image.FromFile(@"C:\Images\2529DA.jpg");
Pen myPen = new Pen(Color.Black);         
Graphics formGraphics = this.picGrid.CreateGraphics();
formGraphics.Clear(picGrid.BackColor);formGraphics.DrawImage(image,0,0,1000, 1000);

This shows the topomap nicely on the screen but with the local picturebox coords from 0 to 1000. If I change the code to

formGraphics.DrawImage(image, 50000, 2800000, 25000, 25000);

This previous code then puts the map WAY offscreen to the south-east !

I tried fiddling with the following code but no luck.

formGraphics.DrawImageUnscaledimage,0,0);
formGraphics.DrawImageUnscaledAndClipped(image, rect1);

please help !

Thanks

Ian

I know that you can save images in the Gif format, but how do you make an animation and save it as a Gif.

please help

When you take a Nerd and a Jock and put them together you get a Nock

AFAIK GDI+ does not support writing multiframe GIF files
(although it WILL read them).

There's probably libraries that will write them, or if you want
to roll your own:

GIF Specification[^]

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Thanks for the help

Do you know of any librarys, because the link was some outdated info on Gif encoding.

If you do not would there be a way to do it using unmanaged code, (I don't know unmaneged code at all)

When you take a Nerd and a Jock and put them together you get a Nock

The Only Nock wrote:
Do you know of any librarys, because the link was some outdated info on Gif encoding.

It's not outdated - that's how long the GIF format has been around Smile | :)

I don't know of any libraries or code to make them programmatically.
It's a shame GDI+ doesn't do it.

Have you searched here at Code Project? Something like this may yield
some good info: NGif, Animated GIF Encoder for .NET[^]

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Windows Picture and Fax Viewer can not view BMP files writen by self-made C++ code (Drawing failed). Either thumbnail of these files are not shown, but they are correctly openable at least with MS Paint, IrfanView and QuickTime PictureViewer. Whats the problem?

Something wrong with the bitmap I imagine.

Some image loading code is more forgiving than others Smile | :)

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

I reveal little bit more: in my code the file size is not set into header, this is only difference against BMP file def. BUT, I have hex dumped many BMP header mady by different programs, and some of them there is neither file size set and these files are still openable with Win Fax Viewer + thumbnail! Magic!

Well since your image is perfect then you should report a bug to microsoft.

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Tapio Grönfors wrote:
Windows Picture and Fax Viewer can not view BMP files writen by self-made C++ code (Drawing failed). Either thumbnail of these files are not shown, but they are correctly openable at least with MS Paint, IrfanView and QuickTime PictureViewer. Whats the problem?

Let's see. Your homegrown code doesn't get the image shown in several applications. Obviously the problem is with them - it couldn't possibly be that there's a bug in your code now, could it?

Deja View - the feeling that you've seen this post before.

My blog | My articles

How to identify the image is piggy backed or overlapped?

What image? What is "piggy backed or overlapped"?

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

I know you can make a icon using
'Icon k = Icon.FromHandle(WorkingImage.GetHicon());'

how do you add more than one icon to the icon file

When you take a Nerd and a Jock and put them together you get a Nock

There is only one way to have more than one Icon in the file.

Write the file using bytes yourself.

When you take a Nerd and a Jock and put them together you get a Nock

I am having trouble With drawing to an image using the Graphics class. I have tried
'...
void somebutton_click(...)
{
Graphics g = Graphics.FromImage(checkbox1.Image);
...
g.Draw...(...'

and

'Graphics g = checkbox1.CreateGraphics()'

the end result is a unchanged picture

please help, I am new

also if you did not see, the language C# and .Net framework

When you take a Nerd and a Jock and put them together you get a Nock