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Diffstat (limited to 'progs/redbook/trim.c')
| -rw-r--r-- | progs/redbook/trim.c | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/progs/redbook/trim.c b/progs/redbook/trim.c deleted file mode 100644 index 216f62a7c2..0000000000 --- a/progs/redbook/trim.c +++ /dev/null @@ -1,187 +0,0 @@ -/* - * Copyright (c) 1993-1997, 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 - * Unpublished-- rights reserved under the copyright laws of the - * United States.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(R) is a registered trademark of Silicon Graphics, Inc. - */ - -/* - * trim.c - * This program draws a NURBS surface in the shape of a - * symmetrical hill, using both a NURBS curve and pwl - * (piecewise linear) curve to trim part of the surface. - */ -#include <stdlib.h> -#include <GL/glut.h> -#include <stdio.h> - - -#ifndef CALLBACK -#define CALLBACK -#endif - - -GLfloat ctlpoints[4][4][3]; - -GLUnurbsObj *theNurb; - -/* - * Initializes the control points of the surface to a small hill. - * The control points range from -3 to +3 in x, y, and z - */ -static void init_surface(void) -{ - int u, v; - for (u = 0; u < 4; u++) { - for (v = 0; v < 4; v++) { - ctlpoints[u][v][0] = 2.0*((GLfloat)u - 1.5); - ctlpoints[u][v][1] = 2.0*((GLfloat)v - 1.5); - - if ( (u == 1 || u == 2) && (v == 1 || v == 2)) - ctlpoints[u][v][2] = 3.0; - else - ctlpoints[u][v][2] = -3.0; - } - } -} - -static void nurbsError(GLenum errorCode) -{ - const GLubyte *estring; - - estring = gluErrorString(errorCode); - fprintf (stderr, "Nurbs Error: %s\n", (char *) estring); - exit (0); -} - -/* Initialize material property and depth buffer. - */ -static void init(void) -{ - GLfloat mat_diffuse[] = { 0.7, 0.7, 0.7, 1.0 }; - GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 }; - GLfloat mat_shininess[] = { 100.0 }; - - glClearColor (0.0, 0.0, 0.0, 0.0); - glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse); - glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular); - glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess); - - glEnable(GL_LIGHTING); - glEnable(GL_LIGHT0); - glEnable(GL_DEPTH_TEST); - glEnable(GL_AUTO_NORMAL); - glEnable(GL_NORMALIZE); - - init_surface(); - - theNurb = gluNewNurbsRenderer(); - gluNurbsProperty(theNurb, GLU_SAMPLING_TOLERANCE, 25.0); - gluNurbsProperty(theNurb, GLU_DISPLAY_MODE, GLU_FILL); - gluNurbsCallback(theNurb, GLU_ERROR, - (GLvoid (CALLBACK*) ()) nurbsError); -} - -static void display(void) -{ - GLfloat knots[8] = {0.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0, 1.0}; - GLfloat edgePt[5][2] = /* counter clockwise */ - {{0.0, 0.0}, {1.0, 0.0}, {1.0, 1.0}, {0.0, 1.0}, {0.0, 0.0}}; - GLfloat curvePt[4][2] = /* clockwise */ - {{0.25, 0.5}, {0.25, 0.75}, {0.75, 0.75}, {0.75, 0.5}}; - GLfloat curveKnots[8] = - {0.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0, 1.0}; - GLfloat pwlPt[4][2] = /* clockwise */ - {{0.75, 0.5}, {0.5, 0.25}, {0.25, 0.5}}; - - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - glPushMatrix(); - glRotatef(330.0, 1.,0.,0.); - glScalef (0.5, 0.5, 0.5); - - gluBeginSurface(theNurb); - gluNurbsSurface(theNurb, 8, knots, 8, knots, - 4 * 3, 3, &ctlpoints[0][0][0], - 4, 4, GL_MAP2_VERTEX_3); - gluBeginTrim (theNurb); - gluPwlCurve (theNurb, 5, &edgePt[0][0], 2, GLU_MAP1_TRIM_2); - gluEndTrim (theNurb); - gluBeginTrim (theNurb); - gluNurbsCurve (theNurb, 8, curveKnots, 2, - &curvePt[0][0], 4, GLU_MAP1_TRIM_2); - gluPwlCurve (theNurb, 3, &pwlPt[0][0], 2, GLU_MAP1_TRIM_2); - gluEndTrim (theNurb); - gluEndSurface(theNurb); - - glPopMatrix(); - glFlush(); -} - -static void reshape(int w, int h) -{ - glViewport(0, 0, (GLsizei) w, (GLsizei) h); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - gluPerspective (45.0, (GLdouble)w/(GLdouble)h, 3.0, 8.0); - - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - glTranslatef (0.0, 0.0, -5.0); -} - -/* ARGSUSED1 */ -static void keyboard(unsigned char key, int x, int y) -{ - switch (key) { - case 27: - exit(0); - break; - } -} - -/* Main Loop - */ -int main(int argc, char** argv) -{ - glutInit(&argc, argv); - glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH); - glutInitWindowSize (500, 500); - glutInitWindowPosition (100, 100); - glutCreateWindow(argv[0]); - init(); - glutReshapeFunc(reshape); - glutDisplayFunc(display); - glutKeyboardFunc (keyboard); - glutMainLoop(); - return 0; -} |