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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  Unpublished-- rights reserved under the copyright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.

*/

#include <math.h>

#include <GL/gl.h>

#include <GL/glu.h>

#include "GL/glut.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 */

void APIENTRY

glutWireSphere(GLdouble radius, GLint slices, 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);

}

void APIENTRY

glutSolidSphere(GLdouble radius, GLint slices, 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);

}

void APIENTRY

glutWireCone(GLdouble base, GLdouble height,

  GLint slices, 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);

}

void APIENTRY

glutSolidCone(GLdouble base, GLdouble height,

  GLint slices, 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 */

void APIENTRY

glutWireCube(GLdouble size)

{

  drawBox(size, GL_LINE_LOOP);

}

void APIENTRY

glutSolidCube(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 */

void APIENTRY

glutWireTorus(GLdouble innerRadius, GLdouble outerRadius,

  GLint nsides, GLint rings)

{

  glPushAttrib(GL_POLYGON_BIT);

  glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);

  doughnut(innerRadius, outerRadius, nsides, rings);

  glPopAttrib();

}

void APIENTRY

glutSolidTorus(GLdouble innerRadius, GLdouble outerRadius,

  GLint nsides, 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;

  dodec[10][0] = beta; dodec[10][1] = alpha; dodec[10][2] = 0;

  dodec[11][0] = beta; dodec[11][1] = -alpha; dodec[11][2] = 0;

  dodec[12][0] = -beta; dodec[12][1] = alpha; dodec[12][2] = 0;

  dodec[13][0] = -beta; dodec[13][1] = -alpha; dodec[13][2] = 0;

  dodec[14][0] = -alpha; dodec[14][1] = 0; dodec[14][2] = -beta;

  dodec[15][0] = alpha; dodec[15][1] = 0; dodec[15][2] = -beta;

  dodec[16][0] = 0; dodec[16][1] = beta; dodec[16][2] = alpha;

  dodec[17][0] = 0; dodec[17][1] = beta; dodec[17][2] = -alpha;

  dodec[18][0] = 0; dodec[18][1] = -beta; dodec[18][2] = alpha;

  dodec[19][0] = 0; dodec[19][1] = -beta; dodec[19][2] = -alpha;

  /* *INDENT-ON* */

}

#define DIFF3(_a,_b,_c) { \

    (_c)[0] = (_a)[0] - (_b)[0]; \

    (_c)[1] = (_a)[1] - (_b)[1]; \

    (_c)[2] = (_a)[2] - (_b)[2]; \

}

static void

crossprod(GLfloat v1[3], GLfloat v2[3], GLfloat prod[3])

{

  GLfloat p[3];         /* in case prod == v1 or v2 */

  p[0] = v1[1] * v2[2] - v2[1] * v1[2];

  p[1] = v1[2] * v2[0] - v2[2] * v1[0];

  p[2] = v1[0] * v2[1] - v2[0] * v1[1];

  prod[0] = p[0];

  prod[1] = p[1];

  prod[2] = p[2];

}

static void

normalize(GLfloat v[3])

{

  GLfloat d;

  d = sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]);

  if (d == 0.0) {

//    __glutWarning("normalize: zero length vector");

    v[0] = d = 1.0;

  }

  d = 1 / d;

  v[0] *= d;

  v[1] *= d;

  v[2] *= d;

}

static void

pentagon(int a, int b, int c, int d, int e, GLenum shadeType)

{

  GLfloat n0[3], d1[3], d2[3];

  DIFF3(dodec[a], dodec[b], d1);

  DIFF3(dodec[b], dodec[c], d2);

  crossprod(d1, d2, n0);

  normalize(n0);

  glBegin(shadeType);

  glNormal3fv(n0);

  glVertex3fv(&dodec[a][0]);

  glVertex3fv(&dodec[b][0]);

  glVertex3fv(&dodec[c][0]);

  glVertex3fv(&dodec[d][0]);

  glVertex3fv(&dodec[e][0]);

  glEnd();

}

static void

dodecahedron(GLenum type)

{

  static int inited = 0;

  if (inited == 0) {

    inited = 1;

    initDodecahedron();

  }

  pentagon(0, 1, 9, 16, 5, type);

  pentagon(1, 0, 3, 18, 7, type);

  pentagon(1, 7, 11, 10, 9, type);

  pentagon(11, 7, 18, 19, 6, type);

  pentagon(8, 17, 16, 9, 10, type);

  pentagon(2, 14, 15, 6, 19, type);

  pentagon(2, 13, 12, 4, 14, type);

  pentagon(2, 19, 18, 3, 13, type);

  pentagon(3, 0, 5, 12, 13, type);

  pentagon(6, 15, 8, 10, 11, type);

  pentagon(4, 17, 8, 15, 14, type);

  pentagon(4, 12, 5, 16, 17, type);

}

/* CENTRY */

void APIENTRY

glutWireDodecahedron(void)

{

  dodecahedron(GL_LINE_LOOP);

}

void APIENTRY

glutSolidDodecahedron(void)

{

  dodecahedron(GL_TRIANGLE_FAN);

}

/* ENDCENTRY */

static void

recorditem(GLfloat * n1, GLfloat * n2, GLfloat * n3,

  GLenum shadeType)

{

  GLfloat q0[3], q1[3];

  DIFF3(n1, n2, q0);

  DIFF3(n2, n3, q1);

  crossprod(q0, q1, q1);

  normalize(q1);

  glBegin(shadeType);

  glNormal3fv(q1);

  glVertex3fv(n1);

  glVertex3fv(n2);

  glVertex3fv(n3);

  glEnd();

}

static void

subdivide(GLfloat * v0, GLfloat * v1, GLfloat * v2,

  GLenum shadeType)

{

  int depth;

  GLfloat w0[3], w1[3], w2[3];

  GLfloat l;

  int i, j, k, n;

  depth = 1;

  for (i = 0; i < depth; i++) {

    for (j = 0; i + j < depth; j++) {

      k = depth - i - j;

      for (n = 0; n < 3; n++) {

        w0[n] = (i * v0[n] + j * v1[n] + k * v2[n]) / depth;

        w1[n] = ((i + 1) * v0[n] + j * v1[n] + (k - 1) * v2[n])

          / depth;

        w2[n] = (i * v0[n] + (j + 1) * v1[n] + (k - 1) * v2[n])

          / depth;

      }

      l = sqrt(w0[0] * w0[0] + w0[1] * w0[1] + w0[2] * w0[2]);

      w0[0] /= l;

      w0[1] /= l;

      w0[2] /= l;

      l = sqrt(w1[0] * w1[0] + w1[1] * w1[1] + w1[2] * w1[2]);

      w1[0] /= l;

      w1[1] /= l;

      w1[2] /= l;

      l = sqrt(w2[0] * w2[0] + w2[1] * w2[1] + w2[2] * w2[2]);

      w2[0] /= l;

      w2[1] /= l;

      w2[2] /= l;

      recorditem(w1, w0, w2, shadeType);

    }

  }

}

static void

drawtriangle(int i, GLfloat data[][3], int ndx[][3],

  GLenum shadeType)

{

  GLfloat *x0, *x1, *x2;

  x0 = data[ndx[i][0]];

  x1 = data[ndx[i][1]];

  x2 = data[ndx[i][2]];

  subdivide(x0, x1, x2, shadeType);

}

/* octahedron data: The octahedron produced is centered at the

   origin and has radius 1.0 */

static GLfloat odata[6][3] =

{

  {1.0, 0.0, 0.0},

  {-1.0, 0.0, 0.0},

  {0.0, 1.0, 0.0},

  {0.0, -1.0, 0.0},

  {0.0, 0.0, 1.0},

  {0.0, 0.0, -1.0}

};

static int ondex[8][3] =

{

  {0, 4, 2},

  {1, 2, 4},

  {0, 3, 4},

  {1, 4, 3},

  {0, 2, 5},

  {1, 5, 2},

  {0, 5, 3},

  {1, 3, 5}

};

static void

octahedron(GLenum shadeType)

{

  int i;

  for (i = 7; i >= 0; i--) {

    drawtriangle(i, odata, ondex, shadeType);

  }

}

/* CENTRY */

void APIENTRY

glutWireOctahedron(void)

{

  octahedron(GL_LINE_LOOP);

}

void APIENTRY

glutSolidOctahedron(void)

{

  octahedron(GL_TRIANGLES);

}

/* ENDCENTRY */

/* icosahedron data: These numbers are rigged to make an

   icosahedron of radius 1.0 */

#define X .525731112119133606

#define Z .850650808352039932

static GLfloat idata[12][3] =

{

  {-X, 0, Z},

  {X, 0, Z},

  {-X, 0, -Z},

  {X, 0, -Z},

  {0, Z, X},

  {0, Z, -X},

  {0, -Z, X},

  {0, -Z, -X},

  {Z, X, 0},

  {-Z, X, 0},

  {Z, -X, 0},

  {-Z, -X, 0}

};

static int index[20][3] =

{

  {0, 4, 1},

  {0, 9, 4},

  {9, 5, 4},

  {4, 5, 8},

  {4, 8, 1},

  {8, 10, 1},

  {8, 3, 10},

  {5, 3, 8},

  {5, 2, 3},

  {2, 7, 3},

  {7, 10, 3},

  {7, 6, 10},

  {7, 11, 6},

  {11, 0, 6},

  {0, 1, 6},

  {6, 1, 10},

  {9, 0, 11},

  {9, 11, 2},

  {9, 2, 5},

  {7, 2, 11},

};

static void

icosahedron(GLenum shadeType)

{

  int i;

  for (i = 19; i >= 0; i--) {

    drawtriangle(i, idata, index, shadeType);

  }

}

/* CENTRY */

void APIENTRY

glutWireIcosahedron(void)

{

  icosahedron(GL_LINE_LOOP);

}

void APIENTRY

glutSolidIcosahedron(void)

{

  icosahedron(GL_TRIANGLES);

}

/* ENDCENTRY */

/* tetrahedron data: */

#define T       1.73205080756887729

static GLfloat tdata[4][3] =

{

  {T, T, T},

  {T, -T, -T},

  {-T, T, -T},

  {-T, -T, T}

};

static int tndex[4][3] =

{

  {0, 1, 3},

  {2, 1, 0},

  {3, 2, 0},

  {1, 2, 3}

};

static void

tetrahedron(GLenum shadeType)

{

  int i;

  for (i = 3; i >= 0; i--)

    drawtriangle(i, tdata, tndex, shadeType);

}

/* CENTRY */

void APIENTRY

glutWireTetrahedron(void)

{

  tetrahedron(GL_LINE_LOOP);

}

void APIENTRY

glutSolidTetrahedron(void)

{

  tetrahedron(GL_TRIANGLES);

}

/* ENDCENTRY */