Initial revision

1 files changed, 148 insertions, 0 deletions

diff --git a/progs/redbook/bezmesh.c b/progs/redbook/bezmesh.c
new file mode 100644
index 0000000000..eb7f0f7a84
--- /dev/null
+++ b/progs/redbook/bezmesh.c
@@ -0,0 +1,148 @@
+
+/* Copyright (c) Mark J. Kilgard, 1994. */
+
+/**
+ * (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+ * Unpublished-- rights reserved under the copyright laws of the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.
+ */
+/*  bezsurf.c
+ *  This program renders a lighted, filled Bezier surface,
+ *  using two-dimensional evaluators.
+ */
+#include <stdlib.h>
+#include <GL/glut.h>
+
+GLfloat ctrlpoints[4][4][3] =
+{
+    {
+        {-1.5, -1.5, 4.0},
+        {-0.5, -1.5, 2.0},
+        {0.5, -1.5, -1.0},
+        {1.5, -1.5, 2.0}},
+    {
+        {-1.5, -0.5, 1.0},
+        {-0.5, -0.5, 3.0},
+        {0.5, -0.5, 0.0},
+        {1.5, -0.5, -1.0}},
+    {
+        {-1.5, 0.5, 4.0},
+        {-0.5, 0.5, 0.0},
+        {0.5, 0.5, 3.0},
+        {1.5, 0.5, 4.0}},
+    {
+        {-1.5, 1.5, -2.0},
+        {-0.5, 1.5, -2.0},
+        {0.5, 1.5, 0.0},
+        {1.5, 1.5, -1.0}}
+};
+
+void 
+initlights(void)
+{
+    GLfloat ambient[] =
+    {0.2, 0.2, 0.2, 1.0};
+    GLfloat position[] =
+    {0.0, 0.0, 2.0, 1.0};
+    GLfloat mat_diffuse[] =
+    {0.6, 0.6, 0.6, 1.0};
+    GLfloat mat_specular[] =
+    {1.0, 1.0, 1.0, 1.0};
+    GLfloat mat_shininess[] =
+    {50.0};
+
+    glEnable(GL_LIGHTING);
+    glEnable(GL_LIGHT0);
+
+    glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
+    glLightfv(GL_LIGHT0, GL_POSITION, position);
+
+    glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
+    glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
+    glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
+}
+
+void 
+display(void)
+{
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    glPushMatrix();
+    glRotatef(85.0, 1.0, 1.0, 1.0);
+    glEvalMesh2(GL_FILL, 0, 20, 0, 20);
+    glPopMatrix();
+    glFlush();
+}
+
+void 
+myinit(void)
+{
+    glClearColor(0.0, 0.0, 0.0, 1.0);
+    glEnable(GL_DEPTH_TEST);
+    glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4,
+        0, 1, 12, 4, &ctrlpoints[0][0][0]);
+    glEnable(GL_MAP2_VERTEX_3);
+    glEnable(GL_AUTO_NORMAL);
+    glEnable(GL_NORMALIZE);
+    glMapGrid2f(20, 0.0, 1.0, 20, 0.0, 1.0);
+    initlights();       /* for lighted version only */
+}
+
+void 
+myReshape(int w, int h)
+{
+    glViewport(0, 0, w, h);
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    if (w <= h)
+        glOrtho(-4.0, 4.0, -4.0 * (GLfloat) h / (GLfloat) w,
+            4.0 * (GLfloat) h / (GLfloat) w, -4.0, 4.0);
+    else
+        glOrtho(-4.0 * (GLfloat) w / (GLfloat) h,
+            4.0 * (GLfloat) w / (GLfloat) h, -4.0, 4.0, -4.0, 4.0);
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+}
+
+int 
+main(int argc, char **argv)
+{
+    glutInit(&argc, argv);
+    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
+    glutCreateWindow(argv[0]);
+    myinit();
+    glutReshapeFunc(myReshape);
+    glutDisplayFunc(display);
+    glutMainLoop();
+    return 0;             /* ANSI C requires main to return int. */
+}