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- /*
- * (c) Copyright 1993, Silicon Graphics, Inc.
- * ALL RIGHTS RESERVED
- * Permission to use, copy, modify, and distribute this software for
- * any purpose and without fee is hereby granted, provided that the above
- * copyright notice appear in all copies and that both the copyright notice
- * and this permission notice appear in supporting documentation, and that
- * the name of Silicon Graphics, Inc. not be used in advertising
- * or publicity pertaining to distribution of the software without specific,
- * written prior permission.
- *
- * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "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, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
- * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
- * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
- * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
- * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
- * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
- * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- * US Government Users Restricted Rights
- * Use, duplication, or disclosure by the Government is subject to
- * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
- * (c)(1)(ii) of the Rights in Technical Data and Computer Software
- * clause at DFARS 252.227-7013 and/or in similar or successor
- * clauses in the FAR or the DOD or NASA FAR Supplement.
- * Unpublished-- rights reserved under the copyright laws of the
- * United States. Contractor/manufacturer is Silicon Graphics,
- * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
- *
- * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
- */
- /*
- * original name: tea.c
- * This program demonstrates two-sided lighting and compares
- * it with one-sided lighting. Three teapots are drawn, with
- * a clipping plane to expose the interior of the objects.
- *
- * NEXTSTEP output provided by Pascal Thibaudeau
- * pthibaud@frbdx11.cribx1.u-bordeaux.fr
- */
- #import <dpsclient/wraps.h>
- #import <appkit/Application.h>
- #import <appkit/Window.h>
- #import <appkit/Menu.h>
- #import <appkit/View.h>
- #import <appkit/color.h>
- #import <appkit/NXBitmapImageRep.h>
-
- #include <GL/gl.h>
- #include <GL/glu.h>
- #include <stdlib.h>
- #include "GL/osmesa.h"
-
- #define WIDTH 400
- #define HEIGHT 400
-
- static void render_image(void)
- {
- GLfloat light_ambient[] = { 0.0, 0.0, 0.0, 1.0 };
- GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
- GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 };
-
- /* light_position is NOT default value */
- GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
- GLdouble eqn[4] = {1.0, 0.0, -1.0, 1.0};
- GLfloat two_side_on[] = { GL_TRUE };
- GLfloat two_side_off[] = { GL_FALSE };
- GLfloat mat_diffuse[] = { 0.8, 0.8, 0.8, 1.0 };
- GLfloat back_diffuse[] = { 0.8, 0.2, 0.8, 1.0 };
-
- glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
- glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
- glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
- glLightfv(GL_LIGHT0, GL_POSITION, light_position);
-
- glFrontFace (GL_CW);
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
- glEnable(GL_AUTO_NORMAL);
- glEnable(GL_NORMALIZE);
- glDepthFunc(GL_LESS);
- glEnable(GL_DEPTH_TEST);
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho (-4.0, 4.0, -4.0*(GLfloat)HEIGHT/(GLfloat)WIDTH,
- 4.0*(GLfloat)HEIGHT/(GLfloat)WIDTH, -10.0, 10.0);
- glMatrixMode(GL_MODELVIEW);
-
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glPushMatrix ();
- glClipPlane (GL_CLIP_PLANE0, eqn); /* slice objects */
- glEnable (GL_CLIP_PLANE0);
-
- glPushMatrix ();
- glTranslatef (0.0, 2.0, 0.0);
- auxSolidTeapot(1.0); /* one-sided lighting */
- glPopMatrix ();
-
- /* two-sided lighting, but same material */
- glLightModelf (GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
- glMaterialfv (GL_FRONT_AND_BACK, GL_DIFFUSE, mat_diffuse);
- glPushMatrix ();
- glTranslatef (0.0, 0.0, 0.0);
- auxSolidTeapot(1.0);
- glPopMatrix ();
-
- /* two-sided lighting, two different materials */
- glMaterialfv (GL_FRONT, GL_DIFFUSE, mat_diffuse);
- glMaterialfv (GL_BACK, GL_DIFFUSE, back_diffuse);
- glPushMatrix ();
- glTranslatef (0.0, -2.0, 0.0);
- auxSolidTeapot(1.0);
- glPopMatrix ();
-
- glLightModelf (GL_LIGHT_MODEL_TWO_SIDE, GL_FALSE);
- glDisable (GL_CLIP_PLANE0);
- glPopMatrix ();
- glFlush();
- }
-
- /* Main Loop
- * Open window with initial window size, title bar,
- * RGBA display mode, and handle input events.
- */
- int main(int argc, char** argv)
- {
- OSMesaContext ctx;
- void *buffer;
- id myWindow, myView, myMenu, image;
- char name[50];
- NXRect GR;
- NXPoint position;
- NXApp=[Application new];
-
- /* Create an RGBA-mode context */
- ctx = OSMesaCreateContext( GL_RGBA, NULL );
-
- /* Allocate the image buffer */
- buffer = malloc( WIDTH * HEIGHT * 4 );
-
- /* Bind the buffer to the context and make it current */
- OSMesaMakeCurrent( ctx, buffer, GL_UNSIGNED_BYTE, WIDTH, HEIGHT );
-
- image = [ [ NXBitmapImageRep alloc]
- initData: buffer
- pixelsWide: WIDTH
- pixelsHigh: HEIGHT
- bitsPerSample: 8
- samplesPerPixel: 4
- hasAlpha: YES
- isPlanar: NO
- colorSpace: 2
- bytesPerRow: WIDTH*4
- bitsPerPixel: 32];
-
- NXSetRect(&GR,100,100,WIDTH,HEIGHT);
-
- myWindow = [ [ Window alloc]
- initContent: &GR
- style: NX_TITLEDSTYLE
- backing: NX_BUFFERED
- buttonMask: NX_MINIATURIZEBUTTONMASK
- defer: NO];
-
- sprintf(name, "OpenGL Graphic Rectangle %d", getpid());
-
- myView = [ [ View alloc] initFrame:&GR];
- [myView setOpaque: NO];
- [myView setDrawOrigin: -WIDTH: -HEIGHT];
- [myView rotate: 180.0];
-
- myMenu = [ [ Menu alloc] initTitle: "NeXT-Mesa"];
- [myMenu addItem: "Quit" action: @selector(terminate:) keyEquivalent: 'q'];
- [myMenu sizeToFit];
-
- [myWindow setTitle: name];
- [myWindow display];
- [myWindow setContentView: myView];
- [myWindow makeKeyAndOrderFront: nil];
-
- [NXApp setMainMenu: myMenu];
-
- [myView lockFocus];
-
- /* here is the Mesa call */
- render_image();
-
- [image draw];
- [image free];
-
- [myWindow flushWindow];
- [myView unlockFocus];
-
- /* free the image buffer */
- free( buffer );
-
- /* destroy the context */
- OSMesaDestroyContext( ctx );
-
- [NXApp run];
- [NXApp free];
-
- return 0;
-
- }
-
-