Section 3: library functions
glutEntryFunc – Window mouse entry/leave callback. Library OpenGLUT – input Synopsis In openglut.h Ft void Fn glutEntryFunc void( *callback )( int state ) Parameters Bf Em callback Ef Client window-entry hook. Description When the mouse enters or exits a window (or sub-window), OpenGLUT can report this transition via the Entry callback. Bf Sy state Ef…
glutEnterGameMode – Enter game mode Library OpenGLUT – gamemode Synopsis In openglut.h Ft int Fn glutEnterGameMode void Description Any combination of the following may apply: – Resolution change, possibly to the requested resolution, possibly to a "nearest match". – Refresh frequency change. – A window with a drawable area equal to the requested screen resolution…
glutDisplayFunc – Sets the Display callback for the current window. Library OpenGLUT – windowcallback Synopsis In openglut.h Ft void Fn glutDisplayFunc void( *callback )( void ) Parameters Bf Em callback Ef Client function for normal redisplay event. Description Sets the display callback for the Bf Li current window Ef . All windows, including subwindows, Bf…
glutDialsFunc – Sets a dials-box button callback. Library OpenGLUT – input Synopsis In openglut.h Ft void Fn glutDialsFunc void( *callback )( int dial int value ) Parameters Bf Em callback Ef Client dials-box dial hook. Description A dials-and-buttons box has dials numbered from 1 to glutDeviceGet( Bf Sy GLUT_NUM_BUTTON_BOX_DIALS), Ef inclusive. The parameters to Bf…
glutDeviceGet – Allows you to get some device state/option variables. Library OpenGLUT – inputstate Synopsis In openglut.h Ft int Fn glutDeviceGet GLenum eWhat Parameters Bf Em eWhat Ef Enumerated parameter ID. Description Retrieves some system-specific information about attached devices. Supported device queries are: – Bf Sy GLUT_HAS_JOYSTICK Ef Return non-zero if there is a…
glutDetachMenu – Detach menu from the current window. Library OpenGLUT – menus Synopsis In openglut.h Ft void Fn glutDetachMenu int button Parameters Bf Em button Ef Mouse button to unbind from. Description If the given Bf Sy button Ef has a menu bound to it, this breaks the assocation. See Also glutCreateMenu(3) glutDestroyMenu(3) glutAttachMenu(3)
glutDestroyWindow – Destroy a window and associated subwindows Library OpenGLUT – window Synopsis In openglut.h Ft void Fn glutDestroyWindow int windowID Parameters Bf Em windowID Ef Window identifier Description After this function is invoked, the only further event that may be delivered for your window is the one for its destruction. All other events should…
glutDestroyMenu – Destroy a menu. Library OpenGLUT – menus Synopsis In openglut.h Ft void Fn glutDestroyMenu int menuID Parameters Bf Em menuID Ef The menu to destroy. Description Destroys a given menu object by its ID. See Also glutCreateMenu(3)
glutCreateWindow – Create a new top-level window Library OpenGLUT – window Synopsis In openglut.h Ft int Fn glutCreateWindow const char* title Parameters Bf Em title Ef Title for created window Description This function sends a request for a window to be constructed. OpenGLUT immediately constructs a data structure to track further events with the window,…
glutCreateSubWindow – Create a subwindow Library OpenGLUT – window Synopsis In openglut.h Ft int Fn glutCreateSubWindow int parentID int x int y int w int h Parameters Bf Em parentID Ef Parent window identifier Bf Em x Ef Horizontal position of subwindow Bf Em y Ef Vertical position of subwindow Bf Em w Ef Width…
glutCreateMenuWindow – Create a client-controlled menu window. Library OpenGLUT – experimental Synopsis In openglut.h Ft int Fn glutCreateMenuWindow int parentID int x int y int w int h Parameters Bf Em parentID Ef Parent window identifier. Bf Em x Ef Horizontal coordinate on the screen. Bf Em y Ef Vertical coordinate on the screen. Bf…
glutCreateMenu – Create a new menu. Library OpenGLUT – menus Synopsis In openglut.h Ft int Fn glutCreateMenu void( *callback )( int value ) Parameters Bf Em callback Ef Client hook for the new menu. Description Create a menu with a callback bound to Bf Sy callback, Ef and return the menu’s integer id. When the…
glutCopyColormap – Copies a color map between windows. Library OpenGLUT – colormap Synopsis In openglut.h Ft void Fn glutCopyColormap int window Parameters Bf Em window Ef The window to copy Bf Li to Ef Description Allows you to copy an entire color map from one window to another. This function copies Bf Em from…
glutCloseFunc – Window destruction callback. Library OpenGLUT – windowcallback Synopsis In openglut.h Ft void Fn glutCloseFunc void( *callback )( void ) Parameters Bf Em callback Ef Client window destruction hook. Description When a window is destroyed by user-action in traditional GLUT, the application terminates. In freeglut and OpenGLUT, the application can choose to persist and…
glutChangeToSubMenu – Replace a menu entry with a submenu. Library OpenGLUT – menus Synopsis In openglut.h Ft void Fn glutChangeToSubMenu int item const char *label int subMenuID Parameters Bf Em item Ef Integer position down the list Bf Em label Ef Submenu item text Bf Em subMenuID Ef Submenu identifier Description Walks the list of…
glutChangeToMenuEntry – Replace a menu entry with an item. Library OpenGLUT – menus Synopsis In openglut.h Ft void Fn glutChangeToMenuEntry int item const char *label int value Parameters Bf Em item Ef Integer position down the list Bf Em label Ef Menu item text Bf Em value Ef Menu item callback value Description Walks the…
glutButtonBoxFunc – Sets a button-box button callback. Library OpenGLUT – input Synopsis In openglut.h Ft void Fn glutButtonBoxFunc void( *callback )( int button int state ) Parameters Bf Em callback Ef Client buttonbox button hook. Description A dials-and-buttons box has buttons numbered from 1 to glutDeviceGet( Bf Sy GLUT_NUM_BUTTON_BOX_BUTTONS), Ef inclusive. The parameters callback are…
glutBitmapWidth – Return the width of a bitmapped character, in pixels. Library OpenGLUT – bitmapfont Synopsis In openglut.h Ft int Fn glutBitmapWidth void *font int character Parameters Bf Em font Ef A bitmapped font identifier. Bf Em character Ef A character code. Description Returns the horizontal OpenGL raster position offset for a Bf Sy character…
glutBitmapString – Draw a string of bitmapped characters Library OpenGLUT – bitmapfont Synopsis In openglut.h Ft void Fn glutBitmapString void *font const unsigned char *string Parameters Bf Em font Ef A bitmapped font identifier. Bf Em string Ef A NUL-terminated ASCII string. Description Draw a Bf Sy string Ef the current OpenGL raster position using…
glutBitmapLength – Return the width of a bitmapped string, in pixels. Library OpenGLUT – bitmapfont Synopsis In openglut.h Ft int Fn glutBitmapLength void *font const unsigned char *string Parameters Bf Em font Ef A bitmapped font identifier. Bf Em string Ef A NUL-terminated ASCII string. Description Returns the maximum horizontal OpenGL raster position offset for…