John Documented InitWindowPosition extensions and added some kbd fn info.

git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@59 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
dheyse 2003-06-02 18:46:27 +00:00
parent 47bf690785
commit a4bfe34a9e

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@ -277,7 +277,41 @@ dodecahedron.
<h2> <h2>
4.2&nbsp; glutInitWindowPosition, glutInitWindowSize</h2> 4.2&nbsp; glutInitWindowPosition, glutInitWindowSize</h2>
The "<tt>glutInitWindowPosition</tt> " and "<tt>glutInitWindowSize</tt>"
functions specify a desired position and size for windows that <i>freeglut</i>
will create in the future.
<p><b>Usage</b>
<p><tt>void glutInitWindowPosition ( int x, int y ) ;</tt>
<br><tt>void glutInitWindowSize ( int width, int height ) ;</tt>
<p><b>Description</b>
<p>The "<tt>glutInitWindowPosition</tt> " and "<tt>glutInitWindowSize</tt>"
functions specify a desired position and size for windows that <i>freeglut</i>
will create in the future.&nbsp; The position is measured in pixels from
the upper left hand corner of the screen, with "x" increasing to the right
and "y" increasing towards the bottom of the screen.&nbsp; The size is
measured in pixels.&nbsp; <i>Freeglut</i> does not promise to follow these
specifications in creating its windows, it certainly makes an attempt to.
<p>The position and size of a window are a matter of some subtlety.&nbsp;
Most windows have a usable area surrounded by a border and with a title
bar on the top.&nbsp; The border and title bar are commonly called "decorations."&nbsp;
The position of the window unfortunately varies with the operating system.&nbsp;
On Linux, it is the coordinates of the upper left-hand corner of its decorations.&nbsp;
On Windows, it is the coordinates of the upper left hand corner of its
usable interior.&nbsp; For both operating systems, the size of the window
is the size of the usable interior.
<p>Windows has some additional quirks which the application programmer
should know about.&nbsp; First, the minimum y-coordinate of a window decoration
is zero.&nbsp; (This is a feature of <i>freeglut</i> and can be adjusted
if so desired.)&nbsp; Second, there appears to be a minimum window width
on Windows which is 104 pixels.&nbsp; The user may specify a smaller width,
but the Windows system calls ignore it.&nbsp; It is also impossible to
make a window narrower than this by dragging on its corner.
<p><b>Changes From GLUT</b>
<p>For some reason, GLUT is not affected by the 104-pixel minimum window
width.&nbsp; If the user clicks on the corner of a window which is narrower
than this amount, the window will immediately snap out to this width, but
the application can call "<tt>glutReshapeWindow</tt> " and make a window
narrower again.
<h2> <h2>
4.3&nbsp; glutInitDisplayMode</h2> 4.3&nbsp; glutInitDisplayMode</h2>
@ -318,8 +352,8 @@ to have control return from the "<tt>glutMainLoop</tt>" function to the
calling function.&nbsp; <i>Freeglut</i> allows the programmer to force calling function.&nbsp; <i>Freeglut</i> allows the programmer to force
this by setting the "<tt>GLUT_ACTION_ON_WINDOW_CLOSE</tt>" option and invoking this by setting the "<tt>GLUT_ACTION_ON_WINDOW_CLOSE</tt>" option and invoking
the "<tt>glutLeaveMainLoop</tt>" function from one of the callbacks.&nbsp; the "<tt>glutLeaveMainLoop</tt>" function from one of the callbacks.&nbsp;
Stopping the program this way is preferable to simply calling "<tt>exit</tt>" Stopping the program this way is preferable to simply calling "<tt>exit</tt>
from within a callback because this allows <i>freeglut</i> to free allocated " from within a callback because this allows <i>freeglut</i> to free allocated
memory and otherwise clean up after itself.&nbsp; (I know I just said this, memory and otherwise clean up after itself.&nbsp; (I know I just said this,
but I think it is important enough that it bears repeating.) but I think it is important enough that it bears repeating.)
<h2> <h2>
@ -332,7 +366,8 @@ in the <i>freeglut</i> event loop.
<p>The&nbsp; "<tt>glutMainLoopEvent</tt> " function causes <i>freeglut</i> <p>The&nbsp; "<tt>glutMainLoopEvent</tt> " function causes <i>freeglut</i>
to process one iteration's worth of events in its event loop.&nbsp; This to process one iteration's worth of events in its event loop.&nbsp; This
allows the application to control its own event loop and still use the allows the application to control its own event loop and still use the
<i>freeglut</i> windowing system. <i>freeglut</i>
windowing system.
<p><b>Changes From GLUT</b> <p><b>Changes From GLUT</b>
<p>GLUT does not include this function. <p>GLUT does not include this function.
<h2> <h2>
@ -347,6 +382,12 @@ to stop the event loop.&nbsp; If the "<tt>GLUT_ACTION_ON_WINDOW_CLOSE</tt>"
option has been set to "<tt>GLUT_ACTION_CONTINUE_EXECUTION</tt> ", control option has been set to "<tt>GLUT_ACTION_CONTINUE_EXECUTION</tt> ", control
will return to the function which called "<tt>glutMainLoop</tt> "; otherwise will return to the function which called "<tt>glutMainLoop</tt> "; otherwise
the application will exit. the application will exit.
<p>If the application has two nested calls to "<tt>glutMainLoop</tt>" and
calls "<tt>glutLeaveMainLoop</tt>", the behaviour of <i>freeglut</i> is
undefined.&nbsp; It may leave only the inner nested loop or it may leave
both loops.&nbsp; If the reader has a strong preference for one behaviour
over the other he should contact the <i>freeglut</i> Programming Consortium
and ask for the code to be fixed.
<p><b>Changes From GLUT</b> <p><b>Changes From GLUT</b>
<p>GLUT does not include this function. <p>GLUT does not include this function.
<h1> <h1>
@ -405,25 +446,73 @@ the application will exit.
<h1> <h1>
9.0&nbsp;<a NAME="Overlay"></a> Overlay Functions</h1> 9.0&nbsp;<a NAME="Overlay"></a> Overlay Functions</h1>
<i>Freeglut</i> does not allow overlays, although it does "answer the mail"
with function stubs so that GLUT-based programs can compile and link against
<i>freeglut</i>
without modification.&nbsp; If the reader needs overlays, he should contact
the <i>freeglut</i> Programming Consortium and ask for them to be implemented.&nbsp;
He should also be prepared to assist in the implementation.
<h2> <h2>
9.1&nbsp; glutEstablishOverlay</h2> 9.1&nbsp; glutEstablishOverlay</h2>
The "<tt>glutEstablishOverlay</tt>" function is not implemented in <i>freeglut</i>.
<p><b>Usage</b>
<p><tt>void glutEstablishOverlay ( void ) ;</tt>
<p><b>Description</b>
<p>The "<tt>glutEstablishOverlay</tt>" function is not implemented in <i>freeglut</i>.
<p><b>Changes From GLUT</b>
<p>GLUT implements this function.
<h2> <h2>
9.2&nbsp; glutRemoveOverlay</h2> 9.2&nbsp; glutRemoveOverlay</h2>
The "<tt>glutRemoveOverlay</tt>" function is not implemented in <i>freeglut</i>.
<p><b>Usage</b>
<p><tt>void glutRemoveOverlay ( void ) ;</tt>
<p><b>Description</b>
<p>The "<tt>glutRemoveOverlay</tt>" function is not implemented in <i>freeglut</i>.
<p><b>Changes From GLUT</b>
<p>GLUT implements this function.
<h2> <h2>
9.3&nbsp; glutUseLayer</h2> 9.3&nbsp; glutUseLayer</h2>
The "<tt>glutUseLayer</tt>" function is not implemented in <i>freeglut</i>.
<p><b>Usage</b>
<p><tt>void glutUseLayer (&nbsp; GLenum layer ) ;</tt>
<p><b>Description</b>
<p>The "<tt>glutUseLayer</tt>" function is not implemented in <i>freeglut</i>.
<p><b>Changes From GLUT</b>
<p>GLUT implements this function.
<h2> <h2>
9.4&nbsp; glutPostOverlayRedisplay</h2> 9.4&nbsp; glutPostOverlayRedisplay</h2>
The "<tt>glutPostOverlayRedisplay</tt> " function is not implemented in
<i>freeglut</i>.
<p><b>Usage</b>
<p><tt>void glutPostOverlayRedisplay ( void ) ;</tt>
<p><b>Description</b>
<p>The "<tt>glutPostOverlayRedisplay</tt> " function is not implemented
in <i>freeglut</i>.
<p><b>Changes From GLUT</b>
<p>GLUT implements this function.
<h2> <h2>
9.5&nbsp; glutPostWindowOverlayRedisplay</h2> 9.5&nbsp; glutPostWindowOverlayRedisplay</h2>
The "<tt>glutPostWindowOverlayRedisplay</tt> " function is not implemented
in <i>freeglut</i>.
<p><b>Usage</b>
<p><tt>void glutPostWindowOverlayRedisplay ( int window ) ;</tt>
<p><b>Description</b>
<p>The "<tt>glutPostWindowOverlayRedisplay</tt> " function is not implemented
in <i>freeglut</i>.
<p><b>Changes From GLUT</b>
<p>GLUT implements this function.
<h2> <h2>
9.6&nbsp; glutShowOverlay, glutHideOverlay</h2> 9.6&nbsp; glutShowOverlay, glutHideOverlay</h2>
The "<tt>glutShowOverlay</tt>" and "<tt>glutHideOverlay</tt>" functions
are not implemented in <i>freeglut</i> .
<p><b>Usage</b>
<p><tt>void glutShowOverlay( void ) ;</tt>
<br><tt>void glutHideOverlay( void ) ;</tt>
<p><b>Description</b>
<p>The "<tt>glutShowOverlay</tt>" and "<tt>glutHideOverlay</tt>" functions
are not implemented in <i>freeglut</i> .
<p><b>Changes From GLUT</b>
<p>GLUT implements these functions.
<h1> <h1>
10.0&nbsp;<a NAME="Menu"></a> Menu Functions</h1> 10.0&nbsp;<a NAME="Menu"></a> Menu Functions</h1>
@ -513,13 +602,151 @@ Functions</h1>
<h2> <h2>
12.6&nbsp; glutSpecialFunc</h2> 12.6&nbsp; glutSpecialFunc</h2>
The "<tt>glutSpecialFunc</tt>" function sets the window's special key press
callback. <i>Freeglut</i> calls the special key press callback when the
user presses a special key.
<p><b>Usage</b>
<p><tt>void glutSpecialFunc ( void (*func) ( int key, int x, int y ) )
;</tt>
<p><tt>func&nbsp;&nbsp;&nbsp; </tt>The window's new special key press callback
function
<br><tt>key&nbsp;&nbsp;&nbsp;&nbsp; </tt>The key whose press triggers the
callback
<br><tt>x&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </tt>The x-coordinate of
the mouse relative to the window at the time the key is pressed
<br><tt>y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </tt>The y-coordinate of
the mouse relative to the window at the time the key is pressed
<p><b>Description</b>
<p>The&nbsp; "<tt>glutSpecialFunc</tt>" function specifies the function
that <i>freeglut</i> will call when the user presses a special key on the
keyboard.&nbsp; The callback function has one argument:&nbsp; the name
of the function to be invoked ("called back") at the time at which the
special key is pressed.&nbsp; The function returns no value.&nbsp; <i>Freeglut</i>
sets the <i>current window</i> to the window which is active when the callback
is invoked.&nbsp; "Special keys" are the function keys, the arrow keys,
the Page Up and Page Down keys, and the Insert key.&nbsp; The Delete key
is considered to be a regular key.
<br>&nbsp;&nbsp;&nbsp; Calling "<tt>glutSpecialUpFunc</tt>" with a NULL
argument disables the call to the window's special key press callback.
<p>&nbsp;&nbsp;&nbsp; The "<tt>key</tt>" argument may take one of the following
defined constant values:
<ul>
<li>
<tt>GLUT_KEY_F1, GLUT_KEY_F2, ..., GLUT_KEY_F12</tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
- F1 through F12 keys</li>
<li>
<tt>GLUT_KEY_PAGE_UP, GLUT_KEY_PAGE_DOWN</tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
- Page Up and Page Down keys</li>
<li>
<tt>GLUT_KEY_HOME, GLUT_KEY_END</tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
- Home and End keys</li>
<li>
<tt>GLUT_KEY_LEFT, GLUT_KEY_RIGHT, GLUT_KEY_UP, GLUT_KEY_DOWN</tt> - arrow
keys</li>
<li>
<tt>GLUT_KEY_INSERT</tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
- Insert key</li>
</ul>
<b>Changes From GLUT</b>
<p>None.
<h2> <h2>
12.7&nbsp; glutKeyboardUpFunc</h2> 12.7&nbsp; glutKeyboardUpFunc</h2>
The "<tt>glutKeyboardUpFunc</tt>" function sets the window's key release
callback. <i>Freeglut</i> calls the key release callback when the user
releases a key.
<p><b>Usage</b>
<p><tt>void glutKeyboardUpFunc ( void (*func) ( unsigned char key, int
x, int y ) ) ;</tt>
<p><tt>func&nbsp;&nbsp;&nbsp; </tt>The window's new key release callback
function
<br><tt>key&nbsp;&nbsp;&nbsp;&nbsp; </tt>The key whose release triggers
the callback
<br><tt>x&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </tt>The x-coordinate of
the mouse relative to the window at the time the key is released
<br><tt>y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </tt>The y-coordinate of
the mouse relative to the window at the time the key is released
<p><b>Description</b>
<p>The&nbsp; "<tt>glutKeyboardUpFunc</tt>" function specifies the function
that <i>freeglut</i> will call when the user releases a key from the keyboard.&nbsp;
The callback function has one argument:&nbsp; the name of the function
to be invoked ("called back") at the time at which the key is released.&nbsp;
The function returns no value.&nbsp; <i>Freeglut</i> sets the <i>current
window</i> to the window which is active when the callback is invoked.
<br>&nbsp;&nbsp;&nbsp; While <i>freeglut</i> checks for upper or lower
case letters, it does not do so for non-alphabetical characters.&nbsp;
Nor does it account for the Caps-Lock key being on.&nbsp; The operating
system may send some unexpected characters to <i>freeglut</i>, such as
"8" when the user is pressing the Shift key.&nbsp; <i>Freeglut</i> also
invokes the callback when the user releases the Control, Alt, or Shift
keys, among others.&nbsp; Releasing the Delete key causes this function
to be invoked with a value of 127 for "<tt>key</tt>".
<br>&nbsp;&nbsp;&nbsp; Calling "<tt>glutKeyboardUpFunc</tt>" with a NULL
argument disables the call to the window's key release callback.
<p><b>Changes From GLUT</b>
<p>This function is not implemented in GLUT versions before Version 4.&nbsp;
It has been designed to be as close to GLUT as possible.&nbsp; Users who
find differences should contact the <i>freeglut</i> development team to
have them fixed.
<h2> <h2>
12.8&nbsp; glutSpecialUpFunc</h2> 12.8&nbsp; glutSpecialUpFunc</h2>
The "<tt>glutSpecialUpFunc</tt>" function sets the window's special key
release callback. <i>Freeglut</i> calls the special key release callback
when the user releases a special key.
<p><b>Usage</b>
<p><tt>void glutSpecialUpFunc ( void (*func) ( int key, int x, int y )
) ;</tt>
<p><tt>func&nbsp;&nbsp;&nbsp; </tt>The window's new special key release
callback function
<br><tt>key&nbsp;&nbsp;&nbsp;&nbsp; </tt>The key whose release triggers
the callback
<br><tt>x&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </tt>The x-coordinate of
the mouse relative to the window at the time the key is released
<br><tt>y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </tt>The y-coordinate of
the mouse relative to the window at the time the key is released
<p><b>Description</b>
<p>The&nbsp; "<tt>glutSpecialUpFunc</tt>" function specifies the function
that <i>freeglut</i> will call when the user releases a special key from
the keyboard.&nbsp; The callback function has one argument:&nbsp; the name
of the function to be invoked ("called back") at the time at which the
special key is released.&nbsp; The function returns no value.&nbsp; <i>Freeglut</i>
sets the <i>current window</i> to the window which is active when the callback
is invoked.&nbsp; "Special keys" are the function keys, the arrow keys,
the Page Up and Page Down keys, and the Insert key.&nbsp; The Delete key
is considered to be a regular key.
<br>&nbsp;&nbsp;&nbsp; Calling "<tt>glutSpecialUpFunc</tt>" with a NULL
argument disables the call to the window's special key release callback.
<p>&nbsp;&nbsp;&nbsp; The "<tt>key</tt>" argument may take one of the following
defined constant values:
<ul>
<li>
<tt>GLUT_KEY_F1, GLUT_KEY_F2, ..., GLUT_KEY_F12</tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
- F1 through F12 keys</li>
<li>
<tt>GLUT_KEY_PAGE_UP, GLUT_KEY_PAGE_DOWN</tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
- Page Up and Page Down keys</li>
<li>
<tt>GLUT_KEY_HOME, GLUT_KEY_END</tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
- Home and End keys</li>
<li>
<tt>GLUT_KEY_LEFT, GLUT_KEY_RIGHT, GLUT_KEY_UP, GLUT_KEY_DOWN</tt> - arrow
keys</li>
<li>
<tt>GLUT_KEY_INSERT</tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
- Insert key</li>
</ul>
<b>Changes From GLUT</b>
<p>This function is not implemented in GLUT versions before Version 4.&nbsp;
It has been designed to be as close to GLUT as possible.&nbsp; Users who
find differences should contact the <i>freeglut</i> development team to
have them fixed.
<h2> <h2>
12.9&nbsp; glutMouseFunc</h2> 12.9&nbsp; glutMouseFunc</h2>
@ -590,9 +817,9 @@ which are rendered using the "<tt>glBitmap</tt>" function call, and stroke
fonts, which are rendered as sequences of OpenGL line segments.&nbsp; Because fonts, which are rendered as sequences of OpenGL line segments.&nbsp; Because
they are rendered as bitmaps, the bitmap fonts tend to render more quickly 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.&nbsp; than stroke fonts, but they are less flexible in terms of scaling and rendering.&nbsp;
Bitmap font characters are positioned with calls to the "<tt>glRasterPos*</tt>" Bitmap font characters are positioned with calls to the "<tt>glRasterPos*</tt>
functions while stroke font characters use the OpenGL transformations to " functions while stroke font characters use the OpenGL transformations
position characters. to position characters.
<p>&nbsp;&nbsp;&nbsp; It should be noted that <i>freeglut</i> fonts are <p>&nbsp;&nbsp;&nbsp; It should be noted that <i>freeglut</i> fonts are
similar but not identical to GLUT fonts.&nbsp; At the moment, <i>freeglut</i> similar but not identical to GLUT fonts.&nbsp; At the moment, <i>freeglut</i>
fonts do not support the "`" (backquote) and "|" (vertical line) characters; fonts do not support the "`" (backquote) and "|" (vertical line) characters;
@ -655,8 +882,8 @@ rendered
<p>The&nbsp; "<tt>glutBitmapCharacter</tt> " function renders the given <p>The&nbsp; "<tt>glutBitmapCharacter</tt> " function renders the given
character in the specified bitmap font.&nbsp; <i>Freeglut</i> automatically character in the specified bitmap font.&nbsp; <i>Freeglut</i> automatically
sets the necessary pixel unpack storage modes and restores the existing sets the necessary pixel unpack storage modes and restores the existing
modes when it has finished.&nbsp; Before the first call to "<tt>glutBitMapCharacter</tt>" modes when it has finished.&nbsp; Before the first call to "<tt>glutBitMapCharacter</tt>
the application program should call "<tt>glRasterPos*</tt>" to set the " the application program should call "<tt>glRasterPos*</tt>" to set the
position of the character in the window.&nbsp; The "<tt>glutBitmapCharacter</tt>" position of the character in the window.&nbsp; The "<tt>glutBitmapCharacter</tt>"
function advances the cursor position as part of its call to "<tt>glBitmap</tt>" function advances the cursor position as part of its call to "<tt>glBitmap</tt>"
and so the application does not need to call "<tt>glRasterPos*</tt>" again and so the application does not need to call "<tt>glRasterPos*</tt>" again
@ -752,9 +979,9 @@ rendered
character in the specified stroke font.&nbsp; Before the first call to character in the specified stroke font.&nbsp; Before the first call to
"<tt>glutStrokeCharacter</tt>" the application program should call the "<tt>glutStrokeCharacter</tt>" the application program should call the
OpenGL transformation (positioning and scaling) functions to set the position OpenGL transformation (positioning and scaling) functions to set the position
of the character in the window.&nbsp; The "<tt>glutStrokeCharacter</tt>" of the character in the window.&nbsp; The "<tt>glutStrokeCharacter</tt>
function advances the cursor position by a call to "<tt>glTranslatef</tt>" " function advances the cursor position by a call to "<tt>glTranslatef</tt>
and so the application does not need to call the OpenGL positioning functions " and so the application does not need to call the OpenGL positioning functions
again for successive characters on the same line. again for successive characters on the same line.
<p><b>Changes From GLUT</b> <p><b>Changes From GLUT</b>
<p>Nonexistent characters are rendered as asterisks. <p>Nonexistent characters are rendered as asterisks.
@ -837,13 +1064,13 @@ that all characters have (nominally) the same height.
<i>Freeglut</i> includes eighteen routines for generating easily-recognizable <i>Freeglut</i> includes eighteen routines for generating easily-recognizable
3-d geometric objects.&nbsp; These routines are effectively the same ones 3-d geometric objects.&nbsp; These routines are effectively the same ones
that are included in the GLUT library, and reflect the functionality available that are included in the GLUT library, and reflect the functionality available
in the <i>aux</i> toolkit described in the <i>OpenGL Programmer's Guide</i>.&nbsp; in the <i>aux</i> toolkit described in the <i>OpenGL Programmer's Guide</i>
They are included to allow programmers to create with a single line of .&nbsp; They are included to allow programmers to create with a single
code a three-dimensional object which can be used to test a variety of line of code a three-dimensional object which can be used to test a variety
OpenGL functionality.&nbsp; None of the routines generates a display list of OpenGL functionality.&nbsp; None of the routines generates a display
for the object which it draws.&nbsp; The functions generate normals appropriate list for the object which it draws.&nbsp; The functions generate normals
for lighting but, except for the teapon functions, do not generate texture appropriate for lighting but, except for the teapon functions, do not generate
coordinates. texture coordinates.
<h2> <h2>
15.1&nbsp; glutWireSphere, glutSolidSphere</h2> 15.1&nbsp; glutWireSphere, glutSolidSphere</h2>
The "<tt>glutWireSphere</tt>" and "<tt>glutSolidSphere</tt>" functions The "<tt>glutWireSphere</tt>" and "<tt>glutSolidSphere</tt>" functions
@ -913,10 +1140,10 @@ number of slices around the base of the cone
number of segments between the base and the tip of the cone (the number number of segments between the base and the tip of the cone (the number
of points, including the tip, is <tt>stacks + 1</tt>) of points, including the tip, is <tt>stacks + 1</tt>)
<p><b>Description</b> <p><b>Description</b>
<p>The "<tt>glutWireCone</tt>" and "<tt>glutSolidCone</tt>" functions render <p>The "<tt>glutWireCone</tt>" and "<tt> glutSolidCone</tt>" functions
a right circular cone with a base centered at the origin and in the X-Y render a right circular cone with a base centered at the origin and in
plane and its tip on the positive Z-axis.&nbsp; The wire cone is rendered the X-Y plane and its tip on the positive Z-axis.&nbsp; The wire cone is
with triangular elements. rendered with triangular elements.
<p><b>Changes From GLUT</b> <p><b>Changes From GLUT</b>
<p>None that we know of. <p>None that we know of.
<h2> <h2>
@ -929,9 +1156,9 @@ a wireframe and solid cube respectively.
<p><tt>dSize&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </tt>The desired <p><tt>dSize&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </tt>The desired
length of an edge of the cube length of an edge of the cube
<p><b>Description</b> <p><b>Description</b>
<p>The "<tt>glutWireCube</tt>" and "<tt>glutSolidCube</tt>" functions render <p>The "<tt>glutWireCube</tt>" and "<tt> glutSolidCube</tt>" functions
a cube of the desired size, centered at the origin.&nbsp; Its faces are render a cube of the desired size, centered at the origin.&nbsp; Its faces
normal to the coordinate directions. are normal to the coordinate directions.
<p><b>Changes From GLUT</b> <p><b>Changes From GLUT</b>
<p>None that we know of. <p>None that we know of.
<h2> <h2>
@ -997,8 +1224,8 @@ one.&nbsp; Two of the corners lie on the positive and negative X-axes.
<p>None that we know of. <p>None that we know of.
<h2> <h2>
15.7&nbsp; glutWireRhombicDodecahedron, glutSolidRhombicDodecahedron</h2> 15.7&nbsp; glutWireRhombicDodecahedron, glutSolidRhombicDodecahedron</h2>
The "<tt>glutWireRhombicDodecahedron</tt>" and "<tt>glutSolidRhombicDodecahedron</tt>" The "<tt>glutWireRhombicDodecahedron</tt>" and "<tt>glutSolidRhombicDodecahedron</tt>
functions draw a wireframe and solid rhombic dodecahedron (twelve-sided " functions draw a wireframe and solid rhombic dodecahedron (twelve-sided
semi-regular solid) respectively. semi-regular solid) respectively.
<p><b>Usage</b> <p><b>Usage</b>
<p><tt>void glutWireRhombicDodecahedron ( void ) ;</tt> <p><tt>void glutWireRhombicDodecahedron ( void ) ;</tt>
@ -1112,5 +1339,11 @@ is the famous OpenGL teapot [add reference].
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