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Type, API. License · X Consortium. Website, FreeGLUT is an open-source alternative to the OpenGL Utility Toolkit (GLUT) library. These kept the API (all gluts functions are usually implemented exactly with the Two of the most common GLUT replacements are OpenGLUT and freeGLUT. It looks to me that Ubuntu has provided everything that the original web site http:// has provided. The api documentation.

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Not all window managers support such finegrained callback messages or can even ensure basic correctness. As far as I know, GLUT is still the simplest toolkit around and yet it does most of what is needed for simple prototypes. Kilgard was releasing updates on a regular basis. More functions return the widths of character strings and the font heights, in pixels for bitmapped fonts and in OpenGL units for the stroke fonts.

Furthermore GLUT last release was back in the last century….

Drawing should be done in the glutDisplayFunc callback. When you create a window with position x,y and size w,hthe upper left hand corner of the outside ffeeglut the window the non-client area is at dreeglut and the size of the drawable client area is w,h. If the user has a need for an unsupported callback he should contact the freeglut development team. Thus the return value may apo from the sum of the character widths returned by a series of calls to glutStrokeWidth.

The original GLUT library seems to have been abandoned with the most recent version 3. The glutShowOverlay and glutHideOverlay functions are not implemented in freeglut. Olszta with contributions from Andreas Umbach and Steve Baker. The Freetlut programming world owes a tremendous debt to Mr. On Windows, there are no notifications if the visibility status of a window changes and FreeGLUT might be in visible state even if the window is fully obscured by other windows.

This is a feature of freeglut and can be adjusted if so desired. The glutVisibilityFunc and the glutWindowStatusFunc functions set the window’s visibility and windowStatus callbacks for the current window.


The freeglut Programming Consortium January, It contains latest references for current Freeglut. The glutWireCylinder and glutSolidCylinder functions draw a wireframe and solid cone respectively.

The position and size of a window are a matter of some subtlety. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Freeglut also invokes the callback when the user releases the Control, Alt, or Shift keys, among others. Two of the corners lie on the positive and negative X-axes. Because they are rendered as bitmaps, the bitmap fonts tend to render more quickly than stroke fonts, but they are less flexible in terms of scaling and rendering. Also for both operating systems, the size of the window is the size of the usable interior.

The glutSpecialFunc function specifies the function that freeglut will call when the user presses a special key on the keyboard.

The other functions render the teacup and teaspoon he used in the table scene figure in his PhD thesis. The glutStrokeString function renders a string of characters in the current window using the specified stroke font. Specify the display mode that should be entered when GameMode is entered. The glutInitWindowPosition and glutInitWindowSize functions specify a desired position and size for windows that freeglut will create in the future.

Note however that according to FreeGLUT’s conventionsthe information returned about the window coordinates does not correspond to the coordinates used when setting window position. Attempt to change to the requested display mode and open the GameMode window, or close the GameMode window and return to the original display mode. The glutWireCube and glutSolidCube functions render a cube of the desired size, centered at the origin.

The glutCloseFunc function sets the window’s close callback. Freeglut calls the mouse wheel callback when the user spins the mouse wheel. Setting the window status callback for a window disables the visibility callback set for the window and vice versa.

The glutSpaceballRotateFunc function is implemented in freeglut on X11 only. In this case, you should use this specific reference: Instead, describe the problem and what has been done so far to solve it. Freeglut does not promise to follow these specifications in creating its windows, but it certainly makes an attempt to.



Note the mouse wheel still functions as the middle button, but those events are treated as regular press and release mouse button events. The glutWireSphere and glutSolidSphere functions draw a wireframe and solid sphere respectively.

A possible usage of this function is when the user presses the ESC key. The rendering position fregelut freeglut is apparently off from GLUT’s position by a few pixels vertically and one or two pixels horizontally. You can easily help out by forking the unofficial clone of our sourceforge.

c++ – Recommended OpenGL / GLUT Reference – Stack Overflow

Freeglut calls the special key press callback when the user presses a special key. There are twenty corners; interestingly enough, eight of them coincide with the corners of a cube with sizes of length 2. Freeglut automatically sets the necessary pixel unpack storage modes and restores the existing modes when it has finished. This teapot, teacup and teaspoon are rendered with their front facing polygon vertices winding clockwise.

The available options are:. On ffeeglut Linux and Windows, you specify the coordinates of the upper left-hand corner frerglut the window’s decorations.

If not defined, warnings and errors are muted not printed to stderrthough errors still trigger deinitialization and exit. Jesper k 34 The glutLeaveMainLoop function causes freeglut apk stop the event loop. See here for an overview of the major points on our todo list. One of the major complaints about the original GLUT was freeglit when a window was closed the application was shutdown automatically.

The operating system may send some unexpected characters to freeglutsuch as “8” when the user is pressing the Shift key.