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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- * Unpublished-- rights reserved under the copyright laws of the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.
- */
- /* texgen.c
- * This program draws a texture mapped teapot with
- * automatically generated texture coordinates. The
- * texture is rendered as stripes on the teapot.
- */
-
- #include <GL/gl.h>
- #include <GL/glu.h>
- #include <stdlib.h>
- #include "glaux.h"
-
- #define stripeImageWidth 32
- GLubyte stripeImage[3*stripeImageWidth];
-
- void makeStripeImage(void)
- {
- int j;
-
- for (j = 0; j < stripeImageWidth; j++) {
- stripeImage[3*j] = (j<=4) ? 255 : 0;
- stripeImage[3*j+1] = (j>4) ? 255 : 0;
- stripeImage[3*j+2] = 0;
- }
- }
-
- /* glTexGen stuff: */
-
- GLfloat sgenparams[] = {1.0, 1.0, 1.0, 0.0};
-
- void myinit(void)
- {
- glClearColor (0.0, 0.0, 0.0, 0.0);
-
- makeStripeImage();
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
- glTexParameterf(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_REPEAT);
- glTexParameterf(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- glTexParameterf(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexImage1D(GL_TEXTURE_1D, 0, 3, stripeImageWidth, 0,
- GL_RGB, GL_UNSIGNED_BYTE, stripeImage);
-
- glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
- glTexGenfv(GL_S, GL_OBJECT_PLANE, sgenparams);
-
- glEnable(GL_DEPTH_TEST);
- glDepthFunc(GL_LESS);
- glEnable(GL_TEXTURE_GEN_S);
- glEnable(GL_TEXTURE_1D);
- glEnable(GL_CULL_FACE);
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
- glEnable(GL_AUTO_NORMAL);
- glEnable(GL_NORMALIZE);
- glFrontFace(GL_CW);
- glCullFace(GL_BACK);
- glMaterialf (GL_FRONT, GL_SHININESS, 64.0);
- }
-
- void display(void)
- {
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- glPushMatrix ();
- glRotatef(45.0, 0.0, 0.0, 1.0);
- auxSolidTeapot(2.0);
- glPopMatrix ();
- glFlush();
- }
-
- void myReshape(int w, int h)
- {
- glViewport(0, 0, w, h);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- if (w <= h)
- glOrtho (-3.5, 3.5, -3.5*(GLfloat)h/(GLfloat)w,
- 3.5*(GLfloat)h/(GLfloat)w, -3.5, 3.5);
- else
- glOrtho (-3.5*(GLfloat)w/(GLfloat)h,
- 3.5*(GLfloat)w/(GLfloat)h, -3.5, 3.5, -3.5, 3.5);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- }
-
- int main(int argc, char** argv)
- {
- auxInitDisplayMode (AUX_SINGLE | AUX_RGB | AUX_DEPTH);
- auxInitPosition (0, 0, 200, 200);
- if (!auxInitWindow (argv[0]))
- auxQuit();
- myinit();
- auxReshapeFunc (myReshape);
- auxMainLoop(display);
- return 0;
- }
-