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- /*
- * (c) Copyright 1993, 1994, 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- * Unpublished-- rights reserved under the copyright laws of the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 "unitsquare.h"
-
- #include <GL/gl.h>
-
- static float vertices[][3] = {
- {-1.0, -1.0, 0.0},
- {0.0, -1.0, 0.0},
- {0.0, 0.0, 0.0},
- {-1.0, 0.0, 0.0},
-
- {0.0, -1.0, 0.0},
- {1.0, -1.0, 0.0},
- {1.0, 0.0, 0.0},
- {0.0, 0.0, 0.0},
-
- {-1.0, 0.0, 0.0},
- {0.0, 0.0, 0.0},
- {0.0, 1.0, 0.0},
- {-1.0, 1.0, 0.0},
-
- {0.0, 0.0, 0.0},
- {1.0, 0.0, 0.0},
- {1.0, 1.0, 0.0},
- {0.0, 1.0, 0.0}
-
- };
-
- static float texcoord[][2] = {
- {0.0, 0.0},
- {0.5, 0.0},
- {0.5, 0.5},
- {0.0, 0.5},
-
- {0.5, 0.0},
- {1.0, 0.0},
- {1.0, 0.5},
- {0.5, 0.5},
-
- {0.0, 0.5},
- {0.5, 0.5},
- {0.5, 1.0},
- {0.0, 1.0},
-
- {0.5, 0.5},
- {1.0, 0.5},
- {1.0, 1.0},
- {0.5, 1.0}
- };
-
- unitsquare::unitsquare()
- {
- }
-
- void unitsquare::open()
- {
- }
-
- void unitsquare::draw()
- {
- glBegin(GL_QUADS);
-
- glTexCoord2fv(texcoord[0]);
- glVertex3fv(vertices[0]);
- glTexCoord2fv(texcoord[1]);
- glVertex3fv(vertices[1]);
- glTexCoord2fv(texcoord[2]);
- glVertex3fv(vertices[2]);
- glTexCoord2fv(texcoord[3]);
- glVertex3fv(vertices[3]);
-
- glTexCoord2fv(texcoord[4]);
- glVertex3fv(vertices[4]);
- glTexCoord2fv(texcoord[5]);
- glVertex3fv(vertices[5]);
- glTexCoord2fv(texcoord[6]);
- glVertex3fv(vertices[6]);
- glTexCoord2fv(texcoord[7]);
- glVertex3fv(vertices[7]);
-
- glTexCoord2fv(texcoord[8]);
- glVertex3fv(vertices[8]);
- glTexCoord2fv(texcoord[9]);
- glVertex3fv(vertices[9]);
- glTexCoord2fv(texcoord[10]);
- glVertex3fv(vertices[10]);
- glTexCoord2fv(texcoord[11]);
- glVertex3fv(vertices[11]);
-
- glTexCoord2fv(texcoord[12]);
- glVertex3fv(vertices[12]);
- glTexCoord2fv(texcoord[13]);
- glVertex3fv(vertices[13]);
- glTexCoord2fv(texcoord[14]);
- glVertex3fv(vertices[14]);
- glTexCoord2fv(texcoord[15]);
- glVertex3fv(vertices[15]);
-
- glEnd();
- }
-
- void unitsquare::draw_backwards()
- {
- glBegin(GL_QUADS);
-
- glTexCoord2fv(texcoord[3]);
- glVertex3fv(vertices[3]);
- glTexCoord2fv(texcoord[2]);
- glVertex3fv(vertices[2]);
- glTexCoord2fv(texcoord[1]);
- glVertex3fv(vertices[1]);
- glTexCoord2fv(texcoord[0]);
- glVertex3fv(vertices[0]);
-
- glTexCoord2fv(texcoord[7]);
- glVertex3fv(vertices[7]);
- glTexCoord2fv(texcoord[6]);
- glVertex3fv(vertices[6]);
- glTexCoord2fv(texcoord[5]);
- glVertex3fv(vertices[5]);
- glTexCoord2fv(texcoord[4]);
- glVertex3fv(vertices[4]);
-
- glTexCoord2fv(texcoord[11]);
- glVertex3fv(vertices[11]);
- glTexCoord2fv(texcoord[10]);
- glVertex3fv(vertices[10]);
- glTexCoord2fv(texcoord[9]);
- glVertex3fv(vertices[9]);
- glTexCoord2fv(texcoord[8]);
- glVertex3fv(vertices[8]);
-
- glTexCoord2fv(texcoord[15]);
- glVertex3fv(vertices[15]);
- glTexCoord2fv(texcoord[14]);
- glVertex3fv(vertices[14]);
- glTexCoord2fv(texcoord[13]);
- glVertex3fv(vertices[13]);
- glTexCoord2fv(texcoord[12]);
- glVertex3fv(vertices[12]);
-
- glEnd();
- }
-