Include dependency graph for surface.c:
/* aux2glut conversion Copyright (c) Mark J. Kilgard, 1994, 1995 */ /* * (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 * Unpublished-- rights reserved under the copyright laws of the * United States.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. */ #include <GL/openglean.h> #include <stdlib.h> GLfloat ctlpoints[4][4][3]; int showPoints = 0; 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 */ 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] = 7.0; else ctlpoints[u][v][2] = -3.0; } } } /* Initialize material property and depth buffer. */ void myinit(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, 1.0); 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); glDepthFunc(GL_LESS); 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); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glTranslatef (0.0, 0.0, -5.0); } void display(void) { GLfloat knots[8] = {0.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0, 1.0}; int i, j; glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glPushMatrix(); glRotatef(330.0, 1.,0.,0.); glScalef (0.25, 0.25, 0.25); gluBeginSurface(theNurb); gluNurbsSurface(theNurb, 8, knots, 8, knots, 4 * 3, 3, &ctlpoints[0][0][0], 4, 4, GL_MAP2_VERTEX_3); gluEndSurface(theNurb); if(showPoints) { glPointSize(5.0); glDisable(GL_LIGHTING); glColor3f(1.0, 1.0, 0.0); glBegin(GL_POINTS); for(i=0;i<4;i++) { for(j=0;j<4;j++) { glVertex3f(ctlpoints[i][j][0], ctlpoints[i][j][1], ctlpoints[i][j][2]); } } glEnd(); glEnable(GL_LIGHTING); } glPopMatrix(); glutSwapBuffers(); } void reshape(int w, int h) { glViewport(0, 0, w, h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective (45.0, (GLdouble)w/(GLdouble)h, 3.0, 8.0); glMatrixMode(GL_MODELVIEW); } void menu(int value) { switch (value) { case 0: case 1: showPoints = value; break; case 2: gluNurbsProperty(theNurb, GLU_DISPLAY_MODE, GLU_FILL); break; case 3: gluNurbsProperty(theNurb, GLU_DISPLAY_MODE, GLU_OUTLINE_POLYGON); break; } glutPostRedisplay(); } int down = 0, lastx; /* ARGSUSED1 */ void motion(int x, int y) { if (down) { glRotatef(lastx - x, 0, 1, 0); lastx = x; glutPostRedisplay(); } } /* ARGSUSED3 */ void mouse(int button, int state, int x, int y) { if (button == GLUT_LEFT_BUTTON) { if (state == GLUT_DOWN) { lastx = x; down = 1; } else { down = 0; } } } static void key(unsigned char k, int x, int y) { switch (k) { case 27: /* Escape */ exit(0); break; default: return; } glutPostRedisplay(); } /* Main Loop */ int main(int argc, char** argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGB); glutCreateWindow(argv[0]); myinit(); glutReshapeFunc(reshape); glutDisplayFunc(display); glutCreateMenu(menu); glutAddMenuEntry("Show control points", 1); glutAddMenuEntry("Hide control points", 0); glutAddMenuEntry("Solid", 2); glutAddMenuEntry("Wireframe", 3); glutAttachMenu(GLUT_RIGHT_BUTTON); glutMouseFunc(mouse); glutMotionFunc(motion); glutKeyboardFunc(key); glutMainLoop(); return 0; /* ANSI C requires main to return int. */ }