mogl.C File Reference

#include "GenericDataBase.h"
#include "wdhdefs.h"
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <unistd.h>
#include <X11/StringDefs.h>
#include <X11/keysym.h>
#include <X11/IntrinsicP.h>
#include <X11/cursorfont.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glx.h>
#include <Xm/BulletinB.h>
#include <Xm/CascadeB.h>
#include <Xm/Command.h>
#include <Xm/DialogS.h>
#include <Xm/FileSB.h>
#include <Xm/Form.h>
#include <Xm/Frame.h>
#include <Xm/Label.h>
#include <Xm/LabelG.h>
#include <Xm/List.h>
#include <Xm/MainW.h>
#include <Xm/MessageB.h>
#include <Xm/RowColumn.h>
#include <Xm/PushB.h>
#include <Xm/PushBG.h>
#include <Xm/Scale.h>
#include <Xm/SelectioB.h>
#include <Xm/Separator.h>
#include <Xm/Text.h>
#include <Xm/TextF.h>
#include <Xm/ToggleB.h>
#include <Xm/ToggleBG.h>
#include "aString.H"
#include "mogl.h"
#include "DialogData.h"
#include <X11/GLw/GLwMDrawA.h>

Include dependency graph for mogl.C:

Classes
struct	WINDOW_REC

Macros
#define	down_width   16
#define	down_height   16
#define	up_width   16
#define	up_height   16
#define	right_width   16
#define	right_height   16
#define	left_width   16
#define	left_height   16
#define	zp_width   16
#define	zp_height   16
#define	zm_width   16
#define	zm_height   16
#define	yrotp_width   16
#define	yrotp_height   16
#define	yrotm_width   16
#define	yrotm_height   16
#define	xrotp_width   16
#define	xrotp_height   16
#define	xrotm_width   16
#define	xrotm_height   16
#define	zrotp_width   16
#define	zrotp_height   16
#define	zrotm_width   16
#define	zrotm_height   16
#define	zoom_in_width   16
#define	zoom_in_height   16
#define	zoom_out_width   16
#define	zoom_out_height   16
#define	reset_width   16
#define	reset_height   16
#define	rotpnt_width   16
#define	rotpnt_height   16
#define	SC   (char *)(const char *)
#define	clipPlane(plane, i)
#define	clipPlaneIsOn(plane)   *(clippingPlaneInfo->clippingPlaneIsOn+(plane))

Typedefs
typedef float	real

Functions
void	showHardcopyDialog (Widget pb, XtPointer client_data, XtPointer call_data)
int	checkGLError ()
void	toggled (Widget widget, XtPointer client_data, XtPointer call_data)
void	detectOverlaySupport (Display *dpy, Visual *overlayVisual, int *overlayDepth, Colormap *overlayColormap)
void	clippingPlanesDialog (Widget pb, XtPointer client_data, XtPointer call_data)
void	annotateDialog (Widget pb, XtPointer client_data, XtPointer call_data)
void	viewCharacteristicsDialog (Widget pb, XtPointer client_data, XtPointer call_data)
void	draw (Widget w)
void	graphicsInit (Widget w, XtPointer data, XtPointer callData)
void	exposeOrResize (Widget w, XtPointer data, XtPointer callData)
void	map_state_changed (Widget w, XtPointer data, XEvent *event, Boolean *cont)
void	popupCallback (Widget menuItem, XtPointer client_data, XtPointer call_data)
void	exec_cmd (Widget widget, XtPointer client_data, XtPointer call_data)
void	inputCommand (Widget cmd_widget, XtPointer client_data, XtPointer call_data)
void	postIt (Widget cmd_widget, XtPointer client_data, XEvent *event, char *dum)
void	buttonCallback (Widget widget, XtPointer client_data, XtPointer call_data)
void	eventLoop ()
void	drawAreaInput (Widget w, XtPointer clientData, XtPointer callData)
void	graphics_setFrustum (GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble near, GLdouble far)
void	graphics_setOrtho (GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble near, GLdouble far)
void	graphics_setOrthoKeepAspectRatio (GLdouble aRatio, GLdouble magFactor, GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble near, GLdouble far)
void	graphics_setPerspective (GLdouble fovy, GLdouble aspect, GLdouble near, GLdouble far)
void	moglDisplay (int win)
void	setMenuNameChosen (const char *answer)
void	setMenuChosen (const int &menuItem, char *answer)
void	getCursor (real &x, real &y)
void	moglInit (int &argc, char *argv[], const aString &windowTitle, aString fileMenuItems[], aString helpMenuItems[], WindowProperties &wProp)
void	moglOpenFileSB (char *extension)
void	moglCloseFileSB ()
void	moglCreateMessageDialog (aString msg, MessageTypeEnum type)
int	moglSetTitle (int win_number, const aString &windowTitle)
int	makeGraphicsWindow (const aString &windowTitle, aString fileMenuItems[], aString helpMenuItems[], ClippingPlaneInfo &clippingPlaneInfo, ViewCharacteristics &viewChar, DialogData &hardCopyDialog, PullDownMenu &optionMenu, WindowProperties &wProp, int directRendering)
int	destroyGraphicsWindow (int win_number)
void	moglSetSensitive (int win_number, int trueOrFalse)
void	moglSetButtonSensitive (int win_number, int btn, int trueOrFalse)
void	moglBuildUserButtons (const aString buttonCommand[], const aString buttonLabel[], int win_number)
void	moglBuildUserMenu (const aString menuName[], const aString menuTitle, int win_number)
void	moglSetViewFunction (MOGL_VIEW_FUNCTION viewFunction_)
void	moglSetFunctions (GL_GraphicsInterface *giPointer, MOGL_DISPLAY_FUNCTION displayFunc, MOGL_RESIZE_FUNCTION resizeFunc)
int	moglMakeCurrent (int win)
int	moglGetInfo (Display *&dpy_, XVisualInfo *&vi, GLXContext &cx)
int	moglGetNWindows ()
int	moglGetCurrentWindow ()
void	moglResetContext ()
void	moglAppendCommandHistory (const aString &answer)
void	moglSetPrompt (const aString &prompt)
void	moglBuildPopup (const aString menu[])
int	moglGetAnswer (aString &answer, const aString prompt, PickInfo *pick_, int blocking)
void	moglGetWindowSize (int &width, int &height, int win)
void	moglPostDisplay (int win)
bool	moglRotationKeysPressed (int win_number)
void	moglPollEvents ()
void	getRubberBandBoxCorners (real &xMin, real &xMax, real &yMin, real &yMax)
void	clipPlaneOnOff (Widget widget, XtPointer clinet_data, XtPointer call_data)
void	scaleCallback (Widget widget, XtPointer clinet_data, XtPointer call_data)
void	changeNormal (Widget widget, XtPointer clinet_data, XtPointer call_data)
void	positionDialog (Widget dialog, XtPointer client_data, XtPointer call_data)
void	annotateOnOff (Widget widget, XtPointer clinet_data, XtPointer call_data)
void	annotateText (Widget widget, XtPointer clinet_data, XtPointer call_data)
void	moglPrintRotPnt (real x, real y, real z, int win_number)
void	moglPrintLineWidth (real lw, int win_number)
void	moglPrintFractionOfScreen (real fraction, int win_number)
void	backgroundCallback (Widget menuItem, XtPointer client_data, XtPointer call_data)
void	foregroundCallback (Widget menuItem, XtPointer client_data, XtPointer call_data)

Variables
XGCValues	gcValues
MOGL_DISPLAY_FUNCTION *	displayFunction = display
MOGL_RESIZE_FUNCTION *	resizeFunction = resize
MOGL_VIEW_FUNCTION *	viewFunction = NULL

Macro Definition Documentation

#define clipPlane	(		plane,
			i
	)

Value:

*(clippingPlaneInfo->clippingPlaneEquation+(i) \
                            +(plane)*4)

Referenced by clippingPlanesDialog().

#define clipPlaneIsOn

(

plane

)

*(clippingPlaneInfo->clippingPlaneIsOn+(plane))

Referenced by clippingPlanesDialog().

#define down_height   16

Referenced by moglInit().

#define down_width   16

Referenced by moglInit().

#define left_height   16

Referenced by moglInit().

#define left_width   16

Referenced by moglInit().

#define reset_height   16

Referenced by moglInit().

#define reset_width   16

Referenced by moglInit().

#define right_height   16

Referenced by moglInit().

#define right_width   16

Referenced by moglInit().

#define rotpnt_height   16

Referenced by moglInit().

#define rotpnt_width   16

Referenced by moglInit().

#define SC   (char *)(const char *)

Referenced by DialogData::changeOptionMenu(), makeGraphicsWindow(), moglAppendCommandHistory(), moglBuildUserButtons(), moglBuildUserMenu(), moglCreateMessageDialog(), moglInit(), moglSetPrompt(), moglSetTitle(), DialogData::openDialog(), DialogData::setInfoLabel(), and DialogData::setTextLabel().

#define up_height   16

Referenced by moglInit().

#define up_width   16

Referenced by moglInit().

#define xrotm_height   16

Referenced by moglInit().

#define xrotm_width   16

Referenced by moglInit().

#define xrotp_height   16

Referenced by moglInit().

#define xrotp_width   16

Referenced by moglInit().

#define yrotm_height   16

Referenced by moglInit().

#define yrotm_width   16

Referenced by moglInit().

#define yrotp_height   16

Referenced by moglInit().

#define yrotp_width   16

Referenced by moglInit().

#define zm_height   16

Referenced by moglInit().

#define zm_width   16

Referenced by moglInit().

#define zoom_in_height   16

Referenced by moglInit().

#define zoom_in_width   16

Referenced by moglInit().

#define zoom_out_height   16

Referenced by moglInit().

#define zoom_out_width   16

Referenced by moglInit().

#define zp_height   16

Referenced by moglInit().

#define zp_width   16

Referenced by moglInit().

#define zrotm_height   16

Referenced by moglInit().

#define zrotm_width   16

Referenced by moglInit().

#define zrotp_height   16

Referenced by moglInit().

#define zrotp_width   16

Referenced by moglInit().

Typedef Documentation

typedef float real

Function Documentation

void annotateDialog	(	Widget	pb,
		XtPointer	client_data,
		XtPointer	call_data
	)

References annotateOnOff(), WINDOW_REC::annotateOpen, annotateText(), FALSE, normal, and NULL.

Referenced by makeGraphicsWindow().

void annotateOnOff	(	Widget	widget,
		XtPointer	clinet_data,
		XtPointer	call_data
	)

References setMenuChosen().

Referenced by annotateDialog().

void annotateText	(	Widget	widget,
		XtPointer	clinet_data,
		XtPointer	call_data
	)

References setMenuChosen().

Referenced by annotateDialog().

void backgroundCallback	(	Widget	menuItem,
		XtPointer	client_data,
		XtPointer	call_data
	)

References setMenuNameChosen(), TRUE, and ViewCharacteristics::win_number.

Referenced by viewCharacteristicsDialog().

void buttonCallback	(	Widget	widget,
		XtPointer	client_data,
		XtPointer	call_data
	)

References NULL, setMenuNameChosen(), and TRUE.

Referenced by makeGraphicsWindow().

void changeNormal	(	Widget	widget,
		XtPointer	clinet_data,
		XtPointer	call_data
	)

References pow(), setMenuChosen(), and sScanF().

Referenced by clippingPlanesDialog().

int checkGLError

(

)

Referenced by GL_GraphicsInterface::display(), graphicsInit(), and moglMakeCurrent().

void clippingPlanesDialog	(	Widget	pb,
		XtPointer	client_data,
		XtPointer	call_data
	)

References changeNormal(), clipPlane, clipPlaneIsOn, clipPlaneOnOff(), WINDOW_REC::clipPlaneOpen, normal, NULL, and scaleCallback().

Referenced by makeGraphicsWindow().

void clipPlaneOnOff	(	Widget	widget,
		XtPointer	clinet_data,
		XtPointer	call_data
	)

References setMenuChosen().

Referenced by clippingPlanesDialog().

int destroyGraphicsWindow

(

int

win_number

)

References WINDOW_REC::cx, ERROR, NULL, OK, and WINDOW_REC::toplevel.

void detectOverlaySupport	(	Display *	dpy,
		Visual *	overlayVisual,
		int *	overlayDepth,
		Colormap *	overlayColormap
	)

Referenced by moglInit().

void draw

(

Widget

w

)

References WINDOW_REC::cx, displayFunction, WINDOW_REC::doubleBuffer, moglMakeCurrent(), and NULL.

Referenced by eventLoop(), moglDisplay(), and moglPollEvents().

void drawAreaInput	(	Widget	w,
		XtPointer	clientData,
		XtPointer	callData
	)

References moglMakeCurrent(), NULL, and WINDOW_REC::toplevel.

Referenced by makeGraphicsWindow().

void eventLoop

(

)

References draw(), FALSE, moglMakeCurrent(), WINDOW_REC::plotStuff, WINDOW_REC::postDisplay, and WINDOW_REC::toplevel.

Referenced by getCursor(), getRubberBandBoxCorners(), and moglGetAnswer().

void exec_cmd	(	Widget	widget,
		XtPointer	client_data,
		XtPointer	call_data
	)

References NULL, setMenuNameChosen(), and TRUE.

Referenced by moglInit().

void exposeOrResize	(	Widget	w,
		XtPointer	data,
		XtPointer	callData
	)

References WINDOW_REC::height, moglMakeCurrent(), NULL, WINDOW_REC::plotStuff, WINDOW_REC::postDisplay, resizeFunction, WINDOW_REC::toplevel, TRUE, and WINDOW_REC::width.

Referenced by makeGraphicsWindow().

void foregroundCallback	(	Widget	menuItem,
		XtPointer	client_data,
		XtPointer	call_data
	)

References setMenuNameChosen(), TRUE, and ViewCharacteristics::win_number.

Referenced by viewCharacteristicsDialog().

void getCursor	(	real &	x,
		real &	y
	)

References eventLoop().

void getRubberBandBoxCorners	(	real &	xMin,
		real &	xMax,
		real &	yMin,
		real &	yMax
	)

References eventLoop(), NULL, and viewFunction.

void graphics_setFrustum	(	GLdouble	left,
		GLdouble	right,
		GLdouble	bottom,
		GLdouble	top,
		GLdouble	near,
		GLdouble	far
	)

void graphics_setOrtho	(	GLdouble	left,
		GLdouble	right,
		GLdouble	bottom,
		GLdouble	top,
		GLdouble	near,
		GLdouble	far
	)

void graphics_setOrthoKeepAspectRatio	(	GLdouble	aRatio,
		GLdouble	magFactor,
		GLdouble	left,
		GLdouble	right,
		GLdouble	bottom,
		GLdouble	top,
		GLdouble	near,
		GLdouble	far
	)

void graphics_setPerspective	(	GLdouble	fovy,
		GLdouble	aspect,
		GLdouble	near,
		GLdouble	far
	)

void graphicsInit	(	Widget	w,
		XtPointer	data,
		XtPointer	callData
	)

References checkGLError(), WINDOW_REC::cx, GLwNvisualInfo, NULL, and WINDOW_REC::plotStuff.

Referenced by makeGraphicsWindow().

void inputCommand	(	Widget	cmd_widget,
		XtPointer	client_data,
		XtPointer	call_data
	)

int makeGraphicsWindow	(	const aString &	windowTitle,
		aString	fileMenuItems[],
		aString	helpMenuItems[],
		ClippingPlaneInfo &	clippingPlaneInfo,
		ViewCharacteristics &	viewChar,
		DialogData &	hardCopyDialog,
		PullDownMenu &	optionMenu,
		WindowProperties &	wProp,
		int	directRendering
	)

References annotateDialog(), WINDOW_REC::annotateOpen, buttonCallback(), ToggleButton::buttonCommand, ToggleButton::buttonLabel, clippingPlanesDialog(), WINDOW_REC::clipPlaneOpen, WINDOW_REC::cmap, WINDOW_REC::cx, WINDOW_REC::doubleBuffer, drawAreaInput(), exposeOrResize(), WINDOW_REC::fractionOfScreen, WINDOW_REC::frame, DialogData::getWidget(), GI_TOGGLEBUTTON, GLwNginitCallback, GLwNvisualInfo, graphicsInit(), WindowProperties::graphicsWindowHeight, WindowProperties::graphicsWindowWidth, WINDOW_REC::height, if(), WINDOW_REC::lineSF, WINDOW_REC::mainw, map_state_changed(), max(), WINDOW_REC::menubar, PullDownMenu::menupane, PullDownMenu::menuTitle, WINDOW_REC::midarea, min(), PullDownMenu::n_button, NULL, WINDOW_REC::numUserBtn, WINDOW_REC::plotStuff, popupCallback(), WINDOW_REC::postDisplay, WINDOW_REC::rightColumn, WINDOW_REC::rotateButtons, WINDOW_REC::rotateFrame, SC, ToggleButton::sensitive, showHardcopyDialog(), ToggleButton::state, ToggleButton::tb, PullDownMenu::tbList, toggled(), WINDOW_REC::toplevel, PullDownMenu::type, WINDOW_REC::userButton, WINDOW_REC::userButtonArea, WINDOW_REC::userCascade, WINDOW_REC::vi, viewCharacteristicsDialog(), WINDOW_REC::viewCharOpen, WINDOW_REC::width, ViewCharacteristics::win_number, and WINDOW_REC::xValue.

Referenced by GL_GraphicsInterface::createWindow().

void map_state_changed	(	Widget	w,
		XtPointer	data,
		XEvent *	event,
		Boolean *	cont
	)

Referenced by makeGraphicsWindow().

void moglAppendCommandHistory

(

const aString &

answer

)

References max(), NULL, and SC.

void moglBuildPopup

(

const aString

menu[]

)

References FALSE, WINDOW_REC::mainw, NULL, and postIt().

void moglBuildUserButtons	(	const aString	buttonCommand[],
		const aString	buttonLabel[],
		int	win_number
	)

References MAX_BUTTONS, NULL, WINDOW_REC::numUserBtn, SC, WINDOW_REC::userButton, and WINDOW_REC::userButtonArea.

void moglBuildUserMenu	(	const aString	menuName[],
		const aString	menuTitle,
		int	win_number
	)

References WINDOW_REC::menubar, NULL, popupCallback(), SC, and WINDOW_REC::userCascade.

void moglCloseFileSB

(

)

References NULL.

void moglCreateMessageDialog	(	aString	msg,
		MessageTypeEnum	type
	)

References errorDialog, informationDialog, messageDialog, NULL, SC, and warningDialog.

void moglDisplay

(

int

win

)

References draw(), and plotStuff().

int moglGetAnswer	(	aString &	answer,
		const aString	prompt,
		PickInfo *	pick_,
		int	blocking
	)

References eventLoop(), FALSE, WINDOW_REC::mainw, moglPollEvents(), moglSetPrompt(), PickInfo::pickBox, PickInfo::pickType, PickInfo::pickWindow, postIt(), and setMenuNameChosen().

int moglGetCurrentWindow

(

)

int moglGetInfo	(	Display *&	dpy_,
		XVisualInfo *&	vi,
		GLXContext &	cx
	)

References WINDOW_REC::cx, and WINDOW_REC::vi.

int moglGetNWindows

(

)

void moglGetWindowSize	(	int &	width,
		int &	height,
		int	win
	)

References NULL, and WINDOW_REC::plotStuff.

void moglInit	(	int &	argc,
		char *	argv[],
		const aString &	windowTitle,
		aString	fileMenuItems[],
		aString	helpMenuItems[],
		WindowProperties &	wProp
	)

References WindowProperties::commandWindowHeight, WindowProperties::commandWindowWidth, detectOverlaySupport(), down_height, down_width, exec_cmd(), left_height, left_width, max(), min(), NULL, popupCallback(), reset_height, reset_width, right_height, right_width, rotpnt_height, rotpnt_width, SC, WindowProperties::showCommandHistory, WindowProperties::showPrompt, WindowProperties::showRubberBandBox, up_height, up_width, xrotm_height, xrotm_width, xrotp_height, xrotp_width, yrotm_height, yrotm_width, yrotp_height, yrotp_width, zm_height, zm_width, zoom_in_height, zoom_in_width, zoom_out_height, zoom_out_width, zp_height, zp_width, zrotm_height, zrotm_width, zrotp_height, and zrotp_width.

int moglMakeCurrent

(

int

win

)

References checkGLError(), ERROR, OK, and plotStuff().

void moglOpenFileSB

(

char *

extension

)

References NULL.

void moglPollEvents

(

)

References draw(), FALSE, moglMakeCurrent(), WINDOW_REC::plotStuff, WINDOW_REC::postDisplay, and WINDOW_REC::toplevel.

void moglPostDisplay

(

int

win

)

References WINDOW_REC::postDisplay, and TRUE.

void moglPrintFractionOfScreen	(	real	fraction,
		int	win_number
	)

Referenced by GL_GraphicsInterface::processSpecialMenuItems().

void moglPrintLineWidth	(	real	lw,
		int	win_number
	)

Referenced by GL_GraphicsInterface::processSpecialMenuItems().

void moglPrintRotPnt	(	real	x,
		real	y,
		real	z,
		int	win_number
	)

Referenced by GL_GraphicsInterface::processSpecialMenuItems().

void moglResetContext

(

)

bool moglRotationKeysPressed

(

int

win_number

)

References WINDOW_REC::toplevel.

void moglSetButtonSensitive	(	int	win_number,
		int	btn,
		int	trueOrFalse
	)

References WINDOW_REC::userButton.

void moglSetFunctions	(	GL_GraphicsInterface *	giPointer,
		MOGL_DISPLAY_FUNCTION	displayFunc,
		MOGL_RESIZE_FUNCTION	resizeFunc
	)

References displayFunction, and resizeFunction.

void moglSetPrompt

(

const aString &

prompt

)

References NULL, and SC.

void moglSetSensitive	(	int	win_number,
		int	trueOrFalse
	)

References WINDOW_REC::numUserBtn, WINDOW_REC::userButton, and WINDOW_REC::userCascade.

int moglSetTitle	(	int	win_number,
		const aString &	windowTitle
	)

References ERROR, NULL, OK, SC, and WINDOW_REC::toplevel.

void moglSetViewFunction

(

MOGL_VIEW_FUNCTION

viewFunction_

)

References viewFunction.

void popupCallback	(	Widget	menuItem,
		XtPointer	client_data,
		XtPointer	call_data
	)

References NULL, setMenuNameChosen(), and TRUE.

Referenced by makeGraphicsWindow(), moglBuildUserMenu(), and moglInit().

void positionDialog	(	Widget	dialog,
		XtPointer	client_data,
		XtPointer	call_data
	)

Referenced by DialogData::openDialog().

void postIt	(	Widget	cmd_widget,
		XtPointer	client_data,
		XEvent *	event,
		char *	dum
	)

Referenced by moglBuildPopup(), and moglGetAnswer().

void scaleCallback	(	Widget	widget,
		XtPointer	clinet_data,
		XtPointer	call_data
	)

References setMenuChosen().

Referenced by clippingPlanesDialog().

void setMenuChosen	(	const int &	menuItem,
		char *	answer
	)

References setMenuNameChosen(), and TRUE.

Referenced by annotateOnOff(), annotateText(), changeNormal(), clipPlaneOnOff(), and scaleCallback().

void setMenuNameChosen

(

const char *

answer

)

Referenced by backgroundCallback(), buttonCallback(), exec_cmd(), foregroundCallback(), moglGetAnswer(), popupCallback(), setMenuChosen(), and toggled().

void showHardcopyDialog	(	Widget	pb,
		XtPointer	client_data,
		XtPointer	call_data
	)

Referenced by makeGraphicsWindow().

void toggled	(	Widget	widget,
		XtPointer	client_data,
		XtPointer	call_data
	)

References setMenuNameChosen(), ToggleButton::state, and TRUE.

Referenced by makeGraphicsWindow().

void viewCharacteristicsDialog	(	Widget	pb,
		XtPointer	client_data,
		XtPointer	call_data
	)

References backgroundCallback(), foregroundCallback(), WINDOW_REC::fractionOfScreen, WINDOW_REC::lineSF, NULL, WINDOW_REC::viewCharOpen, ViewCharacteristics::win_number, and WINDOW_REC::xValue.

Referenced by makeGraphicsWindow().

Variable Documentation

MOGL_DISPLAY_FUNCTION* displayFunction = display

Referenced by draw(), and moglSetFunctions().

XGCValues gcValues

MOGL_RESIZE_FUNCTION* resizeFunction = resize

Referenced by exposeOrResize(), and moglSetFunctions().

MOGL_VIEW_FUNCTION* viewFunction = NULL

Referenced by getRubberBandBoxCorners(), and moglSetViewFunction().