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SGI Developer Toolbox 6.1
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SGI Developer Toolbox 6.1 - Disc 1.iso
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toolbox
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src
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exampleCode
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opengl
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2Dwrap
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ogl
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main.c
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1996-11-11
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6KB
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203 lines
/*
* Copyright (c) 1995, Silicon Graphics, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the name of Silicon Graphics may not be used in any advertising or
* publicity relating to the software without the specific, prior written
* permission of Silicon Graphics.
*
* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF THE
* POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* OpenGL(TM) is a trademark of Silicon Graphics, Inc.
*/
/*----------------------------------------------------------------------------
*
* example showing how to use the porting layer for arcs
*
* Author : Yusuf Attarwala
* SGI - Applications
* Date : Apr 95
*
*
*---------------------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <Xm/Xm.h>
#include <Xm/Frame.h> /* for frame widgets */
#include <Xm/Form.h> /* for frame widgets */
#include <X11/keysym.h> /* keyboard translations */
#include <X11/StringDefs.h>
#include <GL/gl.h> /* gl includes */
#include <GL/glu.h> /* utility library includes */
#include <GL/GLwMDrawA.h> /* include for the drawing area widget */
#include "twodwrap.h"
/* function declarations */
void
createToplevel(void),
drawScene(void),
setMatrix(void),
exposeCB(Widget,XtPointer,XtPointer),
resizeCB(Widget,XtPointer,XtPointer),
initCB(Widget,XtPointer,XtPointer);
/* global variables */
Display *display; /* current display */
XtAppContext appContext; /* X application context */
Widget toplevel, /* toplevel shell */
glw; /* current widget */
GLXContext glxc; /* current glx context */
Arg args[20];
int acnt;
void
main(int argc, char** argv)
{
XtToolkitInitialize();
appContext = XtCreateApplicationContext();
display = XtOpenDisplay(appContext, NULL, "Olight","olight",NULL,0,
&argc,argv);
createToplevel(); /* create widget hierarchy */
XtAppMainLoop(appContext); /* loop forever */
}
void
createToplevel(void)
{
Widget frame;
acnt = 0;
XtSetArg(args[acnt],XmNminHeight, 300);acnt++;
XtSetArg(args[acnt],XmNminWidth, 300);acnt++;
XtSetArg(args[acnt],XmNminAspectX, 1);acnt++;
XtSetArg(args[acnt],XmNminAspectY, 1);acnt++;
XtSetArg(args[acnt],XmNmaxAspectX, 1);acnt++;
XtSetArg(args[acnt],XmNmaxAspectY, 1);acnt++;
toplevel = XtAppCreateShell("openGL arc","oarc",
applicationShellWidgetClass,
display,args,acnt);
/* create a frame to hold glx widget */
frame = XtVaCreateManagedWidget("frame",
xmFrameWidgetClass, toplevel,
NULL);
/* create a double buffer widget, in rgb mode and manage it */
acnt = 0;
XtSetArg(args[acnt], GLwNrgba, TRUE); acnt++;
XtSetArg(args[acnt], GLwNredSize, 1); acnt++;
XtSetArg(args[acnt], GLwNgreenSize, 1); acnt++;
XtSetArg(args[acnt], GLwNblueSize, 1); acnt++;
XtSetArg(args[acnt], GLwNdoublebuffer, TRUE); acnt++;
XtSetArg(args[acnt], GLwNallocateBackground, TRUE); acnt++;
glw = GLwCreateMDrawingArea(frame, "glw", args, acnt);
XtManageChild(glw);
/* register callbacks */
XtAddCallback(glw, GLwNginitCallback, initCB, NULL);
/* realize widget hierarchy */
XtRealizeWidget(toplevel);
/* additional callbacks */
XtAddCallback(glw, GLwNexposeCallback, exposeCB, NULL);
XtAddCallback(glw, GLwNresizeCallback, resizeCB, NULL);
}
void
drawScene(void)
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glColor3f(1.0,1.0,0);
arcf(-5.,-5.6,4.0,2700,0);
glColor3f(0,1.0,1.0);
arc(5.,5.,3.0,1800,900);
glColor3f(1.0,1.0,1.0);
circf(-5.,5.,3.0);
glColor3f(1.0,0.0,0.0);
arci(5,-5,3,1000,2000);
glColor3f(1.0,1.0,0.0);
rect(-1.,-1.,2.0,2.0);
glColor3f(0.0,1.0,0.0);
sboxf(2.,2.,3.5,3.5);
glFlush();
glXSwapBuffers(XtDisplay(glw), XtWindow(glw));
}
void
setMatrix(void)
{
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(-10.0,10.0,-10.0,10.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void
resizeCB(Widget w, XtPointer client_data, XtPointer call)
{
GLwDrawingAreaCallbackStruct *call_data;
call_data = (GLwDrawingAreaCallbackStruct *) call;
GLwDrawingAreaMakeCurrent(w, glxc);
glViewport(0, 0, call_data->width, call_data->height);
setMatrix();
drawScene();
}
void
exposeCB(Widget w, XtPointer client_data, XtPointer call)
{
GLwDrawingAreaCallbackStruct *call_data;
call_data = (GLwDrawingAreaCallbackStruct *) call;
GLwDrawingAreaMakeCurrent(w, glxc);
glViewport(0, 0, call_data->width, call_data->height);
drawScene();
}
void
initCB(Widget w, XtPointer client_data, XtPointer call)
{
XVisualInfo *vi;
XtSetArg(args[0], GLwNvisualInfo, &vi);
XtGetValues(w, args, 1);
glxc = glXCreateContext(XtDisplay(w), vi, 0, GL_TRUE);
glClearColor(0.0, 0.0, 0.0, 0.0);
}