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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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Telescope.c++
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C/C++ Source or Header
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1996-11-11
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5KB
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175 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* Unpublished-- rights reserved under the copyright laws of the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 "Color.h"
#include "Telescope.h"
inline float radians(float a) {return M_PI * a / 180.0;}
Telescope::Telescope(GLfloat x, GLfloat y)
{
xpos = x;
ypos = y;
divisions = 20;
radius = .1;
disk = gluNewQuadric();
cylinder = gluNewQuadric();
gluQuadricNormals(disk, GLU_FLAT);
gluQuadricNormals(cylinder, GLU_SMOOTH);
gluQuadricTexture(disk, GL_TRUE);
gluQuadricTexture(cylinder, GL_TRUE);
}
Telescope::~Telescope()
{
gluDeleteQuadric(disk);
gluDeleteQuadric(cylinder);
}
void Telescope::draw_setup(GLfloat fov, GLfloat aspect, int perspective)
{
GLfloat near;
/* Worry about the aspect ratio later */
near = .5 / tan(radians(fov / 2.0));
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
if (perspective) gluPerspective(fov, aspect, near - .01, 10.0);
else
fprintf(stderr,
"Warning: Drawing telescope using orthographic projection.\n");
gluLookAt(0, 0, -near,
0, 0, 1,
0, 1, 0);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glTranslatef(xpos, ypos, 0);
}
void Telescope::draw_fake()
{
glBegin(GL_QUADS);
glColor3f(1, 1, 1);
glVertex3f(-radius, -radius, .01);
glVertex3f(radius, -radius, .01);
glVertex3f(radius, radius, .01);
glVertex3f(-radius, radius, .01);
glEnd();
}
void Telescope::draw_body()
{
Color c;
glPushMatrix();
glColor3f(1, 1, 0);
gluDisk(disk, radius, 1.1 * radius, divisions, 1);
gluCylinder(cylinder, 1.1 * radius, 1.1 * radius, .1 * radius, divisions, 1);
glTranslatef(0, 0, .1*radius);
gluDisk(disk, radius, 1.1 * radius, divisions, 1);
glPushAttrib(GL_ENABLE_BIT);
glDisable(GL_TEXTURE_2D);
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, white.c);
glColor3f(0, 0, 0);
gluCylinder(cylinder, 1.05 * radius, .95 * radius, .25, divisions, 1);
glPopAttrib();
/* Would just do this with a push / pop, but that seems to be broken.
* glGetMaterialfv also seems to be broken, so we can't use that either. */
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, black.c);
glTranslatef(0, 0, .25);
glColor3f(1, 1, 0);
gluDisk(disk, .95 * radius, 1.05 * radius, divisions, 1);
gluCylinder(cylinder, 1.05 * radius, 1.05 * radius, .1 * radius,
divisions, 1);
glTranslatef(0, 0, .1*radius);
gluDisk(disk, .95 * radius, 1.05 * radius, divisions, 1);
glPopMatrix();
}
void Telescope::draw_takedown()
{
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
void Telescope::draw_lens()
{
gluDisk(disk, 0, radius, divisions, 1);
}
void Telescope::set_divisions(int d)
{
// Someday we'll put all the quadric stuff in display lists...
divisions = d;
}
int Telescope::get_divisions()
{
return divisions;
}
void Telescope::set_radius(GLfloat r)
{
// Someday this might have to update some display lists
radius = r;
}
GLfloat Telescope::get_radius()
{
return radius;
}