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SGI Developer Toolbox 6.1
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SGI Developer Toolbox 6.1 - Disc 1.iso
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stonehenge
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Ring.c++
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C/C++ Source or Header
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1996-11-11
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145 lines
/*
* (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* Unpublished-- rights reserved under the copyright laws of the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);
}
}