lines.c
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上传日期:2007-05-28
资源大小:4876k
文件大小:5k
- /*
- * 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- * Unpublished-- rights reserved under the copyright laws of the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.
- */
- /*
- * lines.c
- * This program demonstrates geometric primitives and
- * their attributes.
- */
- #include <GL/glut.h>
- #include <stdlib.h>
- #define drawOneLine(x1,y1,x2,y2) glBegin(GL_LINES);
- glVertex2f ((x1),(y1)); glVertex2f ((x2),(y2)); glEnd();
- void init(void)
- {
- glClearColor (0.0, 0.0, 0.0, 0.0);
- glShadeModel (GL_FLAT);
- }
- void display(void)
- {
- int i;
- glClear (GL_COLOR_BUFFER_BIT);
- /* select white for all lines */
- glColor3f (1.0, 1.0, 1.0);
- /* in 1st row, 3 lines, each with a different stipple */
- glEnable (GL_LINE_STIPPLE);
-
- glLineStipple (1, 0x0101); /* dotted */
- drawOneLine (50.0, 125.0, 150.0, 125.0);
- glLineStipple (1, 0x00FF); /* dashed */
- drawOneLine (150.0, 125.0, 250.0, 125.0);
- glLineStipple (1, 0x1C47); /* dash/dot/dash */
- drawOneLine (250.0, 125.0, 350.0, 125.0);
- /* in 2nd row, 3 wide lines, each with different stipple */
- glLineWidth (5.0);
- glLineStipple (1, 0x0101); /* dotted */
- drawOneLine (50.0, 100.0, 150.0, 100.0);
- glLineStipple (1, 0x00FF); /* dashed */
- drawOneLine (150.0, 100.0, 250.0, 100.0);
- glLineStipple (1, 0x1C47); /* dash/dot/dash */
- drawOneLine (250.0, 100.0, 350.0, 100.0);
- glLineWidth (1.0);
- /* in 3rd row, 6 lines, with dash/dot/dash stipple */
- /* as part of a single connected line strip */
- glLineStipple (1, 0x1C47); /* dash/dot/dash */
- glBegin (GL_LINE_STRIP);
- for (i = 0; i < 7; i++)
- glVertex2f (50.0 + ((GLfloat) i * 50.0), 75.0);
- glEnd ();
- /* in 4th row, 6 independent lines with same stipple */
- for (i = 0; i < 6; i++) {
- drawOneLine (50.0 + ((GLfloat) i * 50.0), 50.0,
- 50.0 + ((GLfloat)(i+1) * 50.0), 50.0);
- }
- /* in 5th row, 1 line, with dash/dot/dash stipple */
- /* and a stipple repeat factor of 5 */
- glLineStipple (5, 0x1C47); /* dash/dot/dash */
- drawOneLine (50.0, 25.0, 350.0, 25.0);
- glDisable (GL_LINE_STIPPLE);
- glFlush ();
- }
- void reshape (int w, int h)
- {
- glViewport (0, 0, (GLsizei) w, (GLsizei) h);
- glMatrixMode (GL_PROJECTION);
- glLoadIdentity ();
- gluOrtho2D (0.0, (GLdouble) w, 0.0, (GLdouble) h);
- }
- /* ARGSUSED1 */
- void keyboard(unsigned char key, int x, int y)
- {
- switch (key) {
- case 27:
- exit(0);
- break;
- }
- }
- int main(int argc, char** argv)
- {
- glutInit(&argc, argv);
- glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
- glutInitWindowSize (400, 150);
- glutInitWindowPosition (100, 100);
- glutCreateWindow (argv[0]);
- init ();
- glutDisplayFunc(display);
- glutReshapeFunc(reshape);
- glutKeyboardFunc(keyboard);
- glutMainLoop();
- return 0;
- }