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DirectX with Qt

alliedwarrior · 2010-12-06T14:23:15

I made a class that uses DirectX and Qt/** @file Defines the widget to display a Direct3D context */ #ifndef _QD3DWIDGET_H_ #define _QD3DWIDGET_H_ #include <QtGui/QWidget> #include "ui_Main.h"struct IDirect3D9; struct IDirect3DDevice9; class QD3DWidget : public QWidget { Q_OBJECT public: /** Constructor */ QD3DWidget( QWidget* pParent = NULL); /** Destructor */ ~QD3DWidget(); /** a hint to Qt to give the widget as much space as possible */ QSizePolicy sizePolicy() const { return QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding ); } /** a hint to Qt that we take care of the drawing for ourselves, thankyouverymuch */ QPaintEngine *paintEngine() const { return NULL; } protected: /** Initialized the D3D environment */ void Setup(); /** Destroys the D3D environment */ void Close(); /** paints the scene */ void paintEvent( QPaintEvent* pEvent); private: /** D3D stuff */ IDirect3D9* mD3D; IDirect3DDevice9* mDevice; Ui::Form ui;}; #endif // _QD3DWIDGET_H_ #include "QD3DWidget.h" #include <QMessageBox>#define WIN32_LEAN_AND_MEAN #include <d3d9.h> #include <d3dx9.h> // Constructor QD3DWidget::QD3DWidget( QWidget* pParent) : QWidget( pParent) { ui.setupUi(this); mD3D = NULL; mDevice = NULL; setMinimumSize( 400, 400); setAttribute( Qt::WA_OpaquePaintEvent, true); setAttribute( Qt::WA_PaintOnScreen, true); Setup(); } // Destructor QD3DWidget::~QD3DWidget() { Close(); } // Initialized the D3D environment void QD3DWidget::Setup() { HWND windowHandle = winId(); // create Direct3D9 object mD3D = Direct3DCreate9( D3D_SDK_VERSION); if( NULL == mD3D) QMessageBox::critical(this, "ERROR", "Failed to create D3D object", QMessageBox::Ok); // create D3D device // pack hier deine eigenen PresentationParams rein D3DPRESENT_PARAMETERS d3dpp; // create a struct to hold various device information ZeroMemory(&d3dpp, sizeof(d3dpp)); // clear out the struct for use d3dpp.Windowed = TRUE; // program windowed, not fullscreen d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD; // discard old frames d3dpp.hDeviceWindow = windowHandle; // set the window to be used by Direct3D HRESULT hr = mD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, windowHandle, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &d3dpp, &mDevice); if( FAILED( hr)) QMessageBox::critical(this, "ERROR", "Failed to create D3D device", QMessageBox::Ok);} // Destroys the D3D environment void QD3DWidget::Close() { if( mDevice) mDevice->Release(); if( mD3D) mD3D->Release(); } // paints the scene void QD3DWidget::paintEvent( QPaintEvent* pEvent) { // clear render buffer HRESULT hr = mDevice->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 40, 100), 1.0f, 0); if( FAILED( hr)) QMessageBox::critical(this, "ERROR", "Failed to clear backbuffer.", QMessageBox::Ok); mDevice->BeginScene(); // begins the 3D scene mDevice->EndScene(); // ends the 3D scene // and show the result hr = mDevice->Present(NULL, NULL, NULL, NULL); // displays the created frame on the screen if( FAILED( hr)) QMessageBox::critical(this, "ERROR", "Failed to Present().", QMessageBox::Ok); // trigger another update as soon as possible update(); } and got this window: But I would leave the Direct3D rendering in just a portion of the window, something like a Viewport of 3D studio Max, how do this?Thanks

General and Gameplay Programming Programming

Started by alliedwarrior December 04, 2010 06:54 AM

34 comments, last by the_edd 13 years, 4 months ago

alliedwarrior

100

Author

December 05, 2010 07:46 PM

Yes,

why?

SeaBourne

120

December 05, 2010 11:07 PM

If you are just wanting only the scene, then just do it in the code rather than using QtDesigner, create it aggregated, then pass it to setCentralWidget and that's it, no layouts required as a QMainWindow already has a layout.

the_edd

2,109

December 06, 2010 05:36 AM

alliedwarrior: are you basing your form in Qt Designer on a QMainWindow or on a QWidget? From what I can gather from your screenshots, you're using a QWidget as a base but some of SeaBourne's advice is assuming a QMainWindow.

http://www.mr-edd.co.uk
http://bitbucket.org/edd

alliedwarrior

100

Author

December 06, 2010 05:41 AM

Quote:Original post by the_edd
alliedwarrior: are you basing your form in Qt Designer on a QMainWindow or on a QWidget? From what I can gather from your screenshots, you're using a QWidget as a base but some of SeaBourne's advice is assuming a QMainWindow.

In QWidget, but what would be the best choice?
thanks

alliedwarrior

100

Author

December 06, 2010 06:07 AM

Quote:If you do not set the parent of the widget you are inserting into the layout then it cannot appear as a child of the form widget. A widget without a parent is a top-level window regardless of which layouts you add it to. It doesn't show because it has not inherited the visibility of its parent (it doesn't have one).

To do this with Designer:
Drag a generic QWidget into the form widget
Promote that widget to QD3DWidget (from right-click menu) http://doc.trolltech.com/4.7/designe...m-widgets.html
Set the form widget layout to horizontal (it's on the Designer tool bar)
http://doc.trolltech.com/4.7/designer-layouts.html
Let Designer write the code for you

http://www.qtcentre.org/threads/36645-QHBoxLayout?p=168801#post168801

What the guy said qtcentre forum, worked perfectly :)

Only want to know how to access the methods of my class QD3DWidget

the_edd

2,109

December 06, 2010 02:23 PM

Quote:Original post by alliedwarrior
Only want to know how to access the methods of my class QD3DWidget

Hold on to a pointer to it.

http://www.mr-edd.co.uk
http://bitbucket.org/edd

DirectX with Qt

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