glutreshapefunc(3) [centos man page]

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NAME

     glutReshapeFunc -- Sets the Reshape callback for the current window.

LIBRARY

     OpenGLUT - windowcallback

SYNOPSIS

     #include <openglut.h>

     void
     glutReshapeFunc(void( *callback )( int w, int h ));

PARAMETERS

      callback	   Client function for reshape-window event.

DESCRIPTION

     This registers a function with OpenGLUT, which OpenGLUT will invoke whenever the window is reshaped or resized.  Your callback is only
     invoked when the host window system has actually changed the window size.

     The parameters to your callback are the new width and height for your window.

     If you do not provide a reshape callback, OpenGLUT will simply call glViewport(0,0,  w,   h).

     This callback is bound to the  current window  .

     To ask OpenGLUT about the present dimensions of the  current window  , you can use glutGet().

CAVEATS

     Unlike other callbacks, GLUT has an  active   default behavior if you do not set this.   (Most event types passively do nothing if you do not
     specify a callback to handle them.)

     The reshape callback should always be called, if registered, when your window is first created.

SEE ALSO

     glutGet(3) glutReshapeWindow(3)

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NAME

     glutMouseFunc -- Sets the mouse-button callback for the current window.

LIBRARY

     OpenGLUT - input

SYNOPSIS

     #include <openglut.h>

     void
     glutMouseFunc(void( *callback )( int button, int state, int x, int y ));

PARAMETERS

      callback	   Client hook for mouse-buttons.

DESCRIPTION

     Whenever a mouse button is pressed or released in an OpenGLUT window, OpenGLUT checks if that window has a mouse-button (Mouse) callback reg-
     istered.  If so, OpenGLUT gives the event to the handler.	 button  is the button number, starting from 0.   state  is  GLUT_UP  or
     GLUT_DOWN	to indicate the button's new state.  The other parameters are the mouse coordinates.

     Mouse wheel motion can be reported as buttons.  If you do not request otherwise, a wheel spun forward will act like a button clicking down,
     immediately followed by clicking up.  Spinning the same wheel backward will act like a different button clicking.	Mouse wheel pseudo-buttons
     are added after all real buttons.

     While the button is held and the mouse is dragged, you receive mouse-motion events (glutMotionFunc()), even if the mouse is dragged out of
     the window.

     This callback is bound to the  current window  .

CAVEATS

     Reporting the wheel as buttons is actually inherited from X. freeglut added code to support this on WIN32.  OpenGLUT inherited that support
     from freeglut.

     Old GLUT defines the symbols  GLUT_LEFT_BUTTON,   GLUT_RIGHT_BUTTON,  and	GLUT_MIDDLE_BUTTON.   However, mice can have more than 3 buttons,
     so these symbols are deprecated.

     Windows created via glutCreateMenuWindow() always cascade keyboard and mouse events to their parent.

SEE ALSO

     glutMotionFunc(3) glutPassiveMotionFunc(3) glutMouseWheelFunc(3)

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