opengl下的glut源码

GLUT for Win32 README --------------------- VERSION/INFO: This is GLUT for Win32 version 3.7.6 as of Nov 8th 2001. See the COPYRIGHT section for distribution and copyright notices. Send all bug reports and questions for this version of GLUT to Nate Robins [nate@pobox.com]. For more information about GLUT for Win32, see the web page: www.pobox.com/~nate/glut.html or subscribe to the GLUT for Win32 mailing list by sending e-mail to majordomo@perp.com with "subscribe glut" in the body of the message. For general information about GLUT, see the GLUT web page: http://reality.sgi.com/opengl/glut3/glut3.html and be sure to check the GLUT FAQ first for any questions that you may have: http://reality.sgi.com/opengl/glut3/glut-faq.html COMPILING/INSTALLATION: o Precompiled versions of the DLL and import library can be found on the GLUT for Win32 web page mentioned above. o Microsoft Developer Studio 6 workspace and project files have been included in the source code distribution. To build the glut dll: First, open Microsoft Developer Studio. Then, select File -> Open Workspace and find the glut.dsw file in the file dialog and double-click on it. Finally, select Build -> Build glut32.dll. When the build is finished, it will copy: glut32.dll to %WinDir%\System, glut32.lib to $(MSDevDir)\..\..\VC98\lib, and glut.h to $(MSDevDir)\..\..\VC98\include\GL. Additional workspace files have been included in the progs, test and lib directories to build the progs, tests and libs respectively. BORLAND NOTES: From what I understand, Borland supplies a utility that converts Microsoft Visual C++ .libs into Borland compatible files. Therefore, the best method for Borland users is probably to get the precompiled versions of the library and convert the library. To create an import library for Borland from the DLLs, use the following command (from a command prompt): IMPLIB glut32.lib glut32.dll If IMPLIB crashes when called this way, try IMPLIB glut32.lib glut32.def using the glut32.def file in this distribution. FORTRAN NOTES: Bill Mitchell [william.mitchell@nist.gov] has put considerable effort into getting GLUT to work with different compilers for Fortran 90. He indicates that you should copy the f90glut.h file to your $(MSDevDir)\..\..\VC98\include\GL directory. Then, just build GLUT as usual. The Fortran 90 interface, f90gl, can be obtained at http://math.nist.gov/f90gl and contains installation instructions and usage examples. MISC NOTES: o Overlay support is not implemented, nor are there any plans to implement it in the near future. o To customize the windows icon, you can use the resource name GLUT_ICON. For example, create an icon named "glut.ico", and create a file called glut.rc that contains the following: GLUT_ICON ICON glut.ico then compile the glut.rc file with the following: rc /r glut and link the resulting glut.res file into your executable (just like you would an object file). Alternatively, you can simply add the glut.rc file to your project if you are using Microsoft Developer Studio. IMPLEMENTATION DEPENDENT DIFFERENCES: There are a few differences between the Win32 version of GLUT and the X11 version of GLUT. Those are outlined here. Note that MOST of these differences are allowed by the GLUT specification. Bugs and unsupported features are outlined in the UNSUPPORTED/BUGS section. o glutInit: The following command line options have no meaning (and are ignored) in GLUT for Win32: -display, -indirect, -direct, -sync. o glutInitWindowPosition, glutPositionWindow: Win32 has two different coordinate systems for windows. One is in terms of client space and the other is the whole window space (including the decorations). If you glutPositionWindow(0, 0), GLUT for Win32 will place the window CLIENT area at 0, 0. This will cause the window decorations (title bar and left edge) to be OFF-SCREEN, but it gives the user the most flexibility in positioning. HOWEVER, if the user specifies glutInitWindowPosition(0, 0), the window is placed relative to window space at 0, 0. This will cause the window to be opened in the upper left corner with all the decorations showing. This behaviour is acceptable under the current GLUT specification. o glutSetIconTitle, glutSetWindowTitle: There is no separation between Icon title and Window title in Win32. Therefore, setting an icon title in Win32 has no effect. o glutSetCursor: As indicated in the GLUT specification, cursors may be different on different platforms. This is the case in GLUT for Win32. For the most part, the cursors will match the meaning, but not necessarily the shape. Notable exceptions are the GLUT_CURSOR_INFO & GLUT_CURSOR_SPRAY which use the crosshair cursor and the GLUT_CURSOR_CYCLE which uses the 'no' or 'destroy' cursor in Win32. o glutVisibilityFunc: Win32 seems to be unable to determine if a window is fully obscured. Therefore, the visibility of a GLUT window is only reflected by its Iconic, Hidden or Shown state. That is, even if a window is fully obscured, in GLUT for Win32, it is still "visible". o glutEntryFunc: Window Focus is handled differently in Win32 and X. Specifically, the "window manager" in Win32 uses a "click to focus" policy. That is, in order for a window to receive focus, a mouse button must be clicked in it. Likewise, in order for a window to loose focus, a mouse button must be clicked outside the window (or in another window). Therefore, the Enter and Leave notification provided by GLUT may behave differently in the Win32 and in X11 versions. There is a viable workaround for this. A program called "Tweak UI" is provided by Microsoft which can be used to change the focus policy in Win32 to "focus follows mouse". It is available from the Microsoft Web Pages: http://www.microsoft.com/windows/software/PowerToy.htm o glutCopyColormap: GLUT for Win32 always copies the colormap. There is never any sharing of colormaps. This is probably okay, since Win32 merges the logical palette and the physical palette anyway, so even if there are two windows with totally different colors in their colormaps, Win32 will find a (hopefully) good match between them. o glutIdleFunc + menus: The glut idle function will NOT be called when a menu is active. This causes all animation to stop when a menu is active (in general, this is probably okay). Timer functions will still fire, however. If the timer callback draws into the rendering context, the drawing will not show up until after the menu has finished, though. UNSUPPORTED/BUGS: o glutAttachMenu: Win32 only likes to work with left and right mouse buttons. Especially so with popup menus. Therefore, when attaching the menu to the middle mouse button, the LEFT mouse button must be used to select from the menu. o glutSpaceball*, glutButtonBox*, glutTablet*, glutDials*: None of the special input devices are supported at this time. o When resizing or moving a GLUT for Win32