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- /*
- * (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.
- *
- * U.S. GOVERNMENT RESTRICTED RIGHTS LEGEND
- * 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- * Unpublished-- rights reserved under the copyright laws of the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/glu.h>
- #include <GL/glx.h>
-
- #include <math.h>
- #include <stdio.h>
-
- #include "Ring.h"
-
- inline float radians(float a) {return a * M_PI / 180.0;};
-
- Ring::Ring()
- {
- Point sar_dim, lin_dim;
-
- radius = 10;
-
- nstones = 30;
-
- sar_dim.set(.2, .5, 1);
- sarcen.set_dimensions(sar_dim);
- sarcen.translate(radius, 0, sar_dim.pt[2]);
-
- angle = 360.0 / (float)nstones;
-
- lin_dim.set(.2, .99 * tan(2.0 * M_PI / (float)nstones) *
- (radius - sar_dim.pt[0]) / 2.0, .2);
- lintel.set_dimensions(lin_dim);
- lintel.translate(radius, 0, 2.*sar_dim.pt[2] + lin_dim.pt[2]);
- }
-
-
- Ring::~Ring()
- {
- }
-
- void Ring::erode(float p)
- {
- sarcen.erode(p);
- lintel.erode(p);
- }
-
- void Ring::draw()
- {
- draw_sarcens();
- draw_lintels();
- }
-
- void Ring::draw_sarcens()
- {
- int i;
- for (i = 0; i < nstones; i++) {
- glPushMatrix();
- glRotatef(i * angle, 0, 0, 1);
- sarcen.draw();
- glPopMatrix();
- }
- }
-
- void Ring::draw_lintels()
- {
- int i;
- glPushMatrix();
- glRotatef(angle / 2.0, 0, 0, 1);
- for (i = 0; i < nstones; i++) {
- glPushMatrix();
- glRotatef(i * angle, 0, 0, 1);
- lintel.draw();
- glPopMatrix();
- }
- glPopMatrix();
- }
-
- void Ring::draw_shadow(Point dlight, GLfloat blur,
- Color color, Color diffuse)
- {
- draw_sarcens_shadows(dlight, blur, color, diffuse);
- draw_lintels_shadows(dlight, blur, color, diffuse);
- }
-
- void Ring::draw_sarcens_shadows(Point dlight, GLfloat blur,
- Color color, Color diffuse)
- {
- int i;
- Stone proto;
-
- proto = sarcen;
- for (i = 0; i < nstones; i++) {
- proto.rotate_self_aboutz(angle);
- proto.draw_shadow(dlight, blur, color, diffuse);
- }
- }
-
- void Ring::draw_lintels_shadows(Point dlight, GLfloat blur,
- Color color, Color diffuse)
- {
- int i;
- Stone proto;
-
- proto = lintel;
-
- proto.rotate_self_aboutz(angle / 2.0);
-
- for (i = 0; i < nstones; i++) {
- proto.rotate_self_aboutz(angle);
- proto.draw_shadow(dlight, blur, color, diffuse);
- }
- }
-