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Aminet 28
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Aminet 28 (1998)(GTI - Schatztruhe)[!][Dec 1998].iso
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src-glut
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glutShapes.c
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1998-09-19
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/* Copyright (c) Mark J. Kilgard, 1994, 1997. */
/**
(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 Unpublished-- rights reserved under the copyright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.
*/
/*
* glutShapes.c
*
* Modified 27 Jun 1998
* by Jarno van der Linden
* jarno@kcbbs.gen.nz
*
* Based on glut_shapes.c
* Some changes to work with Amiga GLUT
*
* Version 2.0 16 Aug 1998
* by Jarno van der Linden
* jarno@kcbbs.gen.nz
*
* - Changed to runtime library format
*
*/
#include <math.h>
#include "glutstuff.h"
/* Some <math.h> files do not define M_PI... */
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
static GLUquadricObj *quadObj;
#define QUAD_OBJ_INIT() { if(!quadObj) initQuadObj(); }
static void
initQuadObj(void)
{
quadObj = gluNewQuadric();
// if (!quadObj)
// __glutFatalError("out of memory.");
}
/* CENTRY */
__asm __saveds void glutWireSphere( register __fp0 GLdouble radius, register __d0 GLint slices, register __d1 GLint stacks )
{
QUAD_OBJ_INIT();
gluQuadricDrawStyle(quadObj, GLU_LINE);
gluQuadricNormals(quadObj, GLU_SMOOTH);
/* If we ever changed/used the texture or orientation state
of quadObj, we'd need to change it to the defaults here
with gluQuadricTexture and/or gluQuadricOrientation. */
gluSphere(quadObj, radius, slices, stacks);
}
__asm __saveds void glutSolidSphere( register __fp0 GLdouble radius, register __d0 GLint slices, register __d1 GLint stacks )
{
QUAD_OBJ_INIT();
gluQuadricDrawStyle(quadObj, GLU_FILL);
gluQuadricNormals(quadObj, GLU_SMOOTH);
/* If we ever changed/used the texture or orientation state
of quadObj, we'd need to change it to the defaults here
with gluQuadricTexture and/or gluQuadricOrientation. */
gluSphere(quadObj, radius, slices, stacks);
}
__asm __saveds void glutWireCone( register __fp0 GLdouble base, register __fp1 GLdouble height, register __d0 GLint slices, register __d1 GLint stacks )
{
QUAD_OBJ_INIT();
gluQuadricDrawStyle(quadObj, GLU_LINE);
gluQuadricNormals(quadObj, GLU_SMOOTH);
/* If we ever changed/used the texture or orientation state
of quadObj, we'd need to change it to the defaults here
with gluQuadricTexture and/or gluQuadricOrientation. */
gluCylinder(quadObj, base, 0.0, height, slices, stacks);
}
__asm __saveds void glutSolidCone( register __fp0 GLdouble base, register __fp1 GLdouble height, register __d0 GLint slices, register __d1 GLint stacks )
{
QUAD_OBJ_INIT();
gluQuadricDrawStyle(quadObj, GLU_FILL);
gluQuadricNormals(quadObj, GLU_SMOOTH);
/* If we ever changed/used the texture or orientation state
of quadObj, we'd need to change it to the defaults here
with gluQuadricTexture and/or gluQuadricOrientation. */
gluCylinder(quadObj, base, 0.0, height, slices, stacks);
}
/* ENDCENTRY */
static void
drawBox(GLfloat size, GLenum type)
{
static GLfloat n[6][3] =
{
{-1.0, 0.0, 0.0},
{0.0, 1.0, 0.0},
{1.0, 0.0, 0.0},
{0.0, -1.0, 0.0},
{0.0, 0.0, 1.0},
{0.0, 0.0, -1.0}
};
static GLint faces[6][4] =
{
{0, 1, 2, 3},
{3, 2, 6, 7},
{7, 6, 5, 4},
{4, 5, 1, 0},
{5, 6, 2, 1},
{7, 4, 0, 3}
};
GLfloat v[8][3];
GLint i;
v[0][0] = v[1][0] = v[2][0] = v[3][0] = -size / 2;
v[4][0] = v[5][0] = v[6][0] = v[7][0] = size / 2;
v[0][1] = v[1][1] = v[4][1] = v[5][1] = -size / 2;
v[2][1] = v[3][1] = v[6][1] = v[7][1] = size / 2;
v[0][2] = v[3][2] = v[4][2] = v[7][2] = -size / 2;
v[1][2] = v[2][2] = v[5][2] = v[6][2] = size / 2;
for (i = 5; i >= 0; i--) {
glBegin(type);
glNormal3fv(&n[i][0]);
glVertex3fv(&v[faces[i][0]][0]);
glVertex3fv(&v[faces[i][1]][0]);
glVertex3fv(&v[faces[i][2]][0]);
glVertex3fv(&v[faces[i][3]][0]);
glEnd();
}
}
/* CENTRY */
__asm __saveds void glutWireCube( register __fp0 GLdouble size )
{
drawBox(size, GL_LINE_LOOP);
}
__asm __saveds void glutSolidCube( register __fp0 GLdouble size )
{
drawBox(size, GL_QUADS);
}
/* ENDCENTRY */
static void
doughnut(GLfloat r, GLfloat R, GLint nsides, GLint rings)
{
int i, j;
GLfloat theta, phi, theta1;
GLfloat cosTheta, sinTheta;
GLfloat cosTheta1, sinTheta1;
GLfloat ringDelta, sideDelta;
ringDelta = 2.0 * M_PI / rings;
sideDelta = 2.0 * M_PI / nsides;
theta = 0.0;
cosTheta = 1.0;
sinTheta = 0.0;
for (i = rings - 1; i >= 0; i--) {
theta1 = theta + ringDelta;
cosTheta1 = cos(theta1);
sinTheta1 = sin(theta1);
glBegin(GL_QUAD_STRIP);
phi = 0.0;
for (j = nsides; j >= 0; j--) {
GLfloat cosPhi, sinPhi, dist;
phi += sideDelta;
cosPhi = cos(phi);
sinPhi = sin(phi);
dist = R + r * cosPhi;
glNormal3f(cosTheta1 * cosPhi, -sinTheta1 * cosPhi, sinPhi);
glVertex3f(cosTheta1 * dist, -sinTheta1 * dist, r * sinPhi);
glNormal3f(cosTheta * cosPhi, -sinTheta * cosPhi, sinPhi);
glVertex3f(cosTheta * dist, -sinTheta * dist, r * sinPhi);
}
glEnd();
theta = theta1;
cosTheta = cosTheta1;
sinTheta = sinTheta1;
}
}
/* CENTRY */
__asm __saveds void glutWireTorus( register __fp0 GLdouble innerRadius, register __fp1 GLdouble outerRadius,
register __d0 GLint nsides, register __d1 GLint rings )
{
glPushAttrib(GL_POLYGON_BIT);
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
doughnut(innerRadius, outerRadius, nsides, rings);
glPopAttrib();
}
__asm __saveds void glutSolidTorus( register __fp0 GLdouble innerRadius, register __fp1 GLdouble outerRadius,
register __d0 GLint nsides, register __d1 GLint rings )
{
doughnut(innerRadius, outerRadius, nsides, rings);
}
/* ENDCENTRY */
static GLfloat dodec[20][3];
static void
initDodecahedron(void)
{
GLfloat alpha, beta;
alpha = sqrt(2.0 / (3.0 + sqrt(5.0)));
beta = 1.0 + sqrt(6.0 / (3.0 + sqrt(5.0)) -
2.0 + 2.0 * sqrt(2.0 / (3.0 + sqrt(5.0))));
/* *INDENT-OFF* */
dodec[0][0] = -alpha; dodec[0][1] = 0; dodec[0][2] = beta;
dodec[1][0] = alpha; dodec[1][1] = 0; dodec[1][2] = beta;
dodec[2][0] = -1; dodec[2][1] = -1; dodec[2][2] = -1;
dodec[3][0] = -1; dodec[3][1] = -1; dodec[3][2] = 1;
dodec[4][0] = -1; dodec[4][1] = 1; dodec[4][2] = -1;
dodec[5][0] = -1; dodec[5][1] = 1; dodec[5][2] = 1;
dodec[6][0] = 1; dodec[6][1] = -1; dodec[6][2] = -1;
dodec[7][0] = 1; dodec[7][1] = -1; dodec[7][2] = 1;
dodec[8][0] = 1; dodec[8][1] = 1; dodec[8][2] = -1;
dodec[9][0] = 1; dodec[9][1] = 1; dodec[9][2] = 1;