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Operating Systems Linux Ubuntu i am new to opengl , how to work opengl in ubuntu Post 302349140 by Ravikishore on Monday 31st of August 2009 07:58:40 AM
Old 08-31-2009
Hi Sir,

I worked with c programs in ubuntu for openGL,,, now im trying to execute the c++ programs for openGL ,,,, while compiling its showing error message as

root@lxdevenv:/usr/include/GL# g++ -c -I$QTDIR/include ravvv.cpp
ravvv.cpp:1:18: error: kapp.h: No such file or directory
ravvv.cpp:2:24: error: qwidget.h: No such file or directory
ravvv.cpp:3:75: error: qpainter.h: No such file or directory
ravvv.cpp:4:23: error: qimage.h: No such file or directory
ravvv.cpp:7: error: expected class-name before ‘{’ token
ravvv.cpp:8: error: expected `}' at end of input
ravvv.cpp:8: error: expected unqualified-id at end of input
root@lxdevenv:/usr/include/GL#


and my code is

#include <kapp.h>
#include <qwidget.h>
#include <qpainter.h> // The QPainter class draws graphics on widgets.
#include <qimage.h>

class MyWindow : public QWidget
{
public:
// Constructor for the window, just call the QWidget constructor
MyWindow() : QWidget() { }
protected:
void paintEvent(QPaintEvent *);
};

// This function is called when the window area must be updated.
// Load and view the image
void MyWindow:SmilieaintEvent(QPaintEvent *ev)
{
// Load the image that we want to show
QImage image;
if (image.load("test.jpg", 0)) // If the image was loaded,
{ // Show the image.
// Draw graphics in this window
QPainter paint(this);
// Draw the image we loaded on the window
paint.drawImage(0, 0, image, 0, 0,
image.width(), image.height());
}
}


int main(int argc, char **argv)
{
KApplication app(argc, argv)
// Create the window
MyWindow window;
app.setMainWidget(&window);
window.setCaption("ImageIO Example");
window.setGeometry(100,100,300,300);
window.show();
return app.exec();
}


guide me ..it will appreciated ....
 

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glutInitWindowPosition(3GLUT)					       GLUT					     glutInitWindowPosition(3GLUT)

NAME
glutInitWindowPositionWindowPosition, glutInitWindowSize - set the initial window position and size respectively. SYNTAX
void glutInitWindowSize(int width, int height); void glutInitWindowPosition(int x, int y); ARGUMENTS
width Width in pixels. height Height in pixels. x Window X location in pixels. y Window Y location in pixels. DESCRIPTION
Windows created by glutCreateWindow will be requested to be created with the current initial window position and size. The initial value of the initial window position GLUT state is -1 and -1. If either the X or Y component to the initial window position is negative, the actual window position is left to the window system to determine. The initial value of the initial window size GLUT state is 300 by 300. The initial window size components must be greater than zero. The intent of the initial window position and size values is to provide a suggestion to the window system for a window's initial size and position. The window system is not obligated to use this information. Therefore, GLUT programs should not assume the window was created at the specified size or position. A GLUT program should use the window's reshape callback to determine the true size of the window. EXAMPLE
If you would like your GLUT program to default to starting at a given screen location and at a given size, but you would also like to let the user override these defaults via a command line argument (such as -geometry for X11), call glutInitWindowSize and glutInitWindowPosi- tion before your call to glutInit. For example: int main(int argc, char **argv) { glutInitWindowSize(500, 300); glutInitWindowPosition(100, 100); glutInit(&argc, argv); ... } However, if you'd like to force your program to start up at a given size, call glutInitWindowSize and glutInitWindowPosition after your call to glutInit. For example: int main(int argc, char **argv) { glutInit(&argc, argv); glutInitWindowSize(500, 300); glutInitWindowPosition(100, 100); ... } SEE ALSO
glutInit, glutCreateWindow, glutCreateSubWindow, glutReshapeFunc, glutGet AUTHOR
Mark J. Kilgard (mjk@nvidia.com) GLUT
3.7 glutInitWindowPosition(3GLUT)
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