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- /* shapes.c */
-
-
- #include <stdio.h>
- #include <stdlib.h>
- #include <math.h>
- #include <GL/gl.h>
- #include <GL/glu.h>
- #include "glaux.h"
- #include "3d.h"
-
-
-
- #define SPHEREWIRE 0
- #define CUBEWIRE 1
- #define BOXWIRE 2
- #define TORUSWIRE 3
- #define CYLINDERWIRE 4
- #define ICOSAWIRE 5
- #define OCTAWIRE 6
- #define TETRAWIRE 7
- #define DODECAWIRE 8
- #define CONEWIRE 9
- #define SPHERESOLID 10
- #define CUBESOLID 11
- #define BOXSOLID 12
- #define TORUSSOLID 13
- #define CYLINDERSOLID 14
- #define ICOSASOLID 15
- #define OCTASOLID 16
- #define TETRASOLID 17
- #define DODECASOLID 18
- #define CONESOLID 19
-
- #ifndef PI
- #define PI 3.1415926535897
- #endif
-
-
- /* structure for each geometric object */
- typedef struct model {
- GLuint list; /* display list to render object */
- struct model *ptr; /* pointer to next object */
- int numParam; /* # of parameters */
- GLdouble *params; /* array with parameters */
- } MODEL, *MODELPTR;
-
- /* array of linked lists--used to keep track of display lists
- * for each different type of geometric object.
- */
- static MODELPTR lists[25] = {
- NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL
- };
-
- GLuint findList (int lindex, GLdouble *paramArray, int size);
- int compareParams (GLdouble *oneArray, GLdouble *twoArray, int size);
- GLuint makeModelPtr (int lindex, GLdouble *sizeArray, int count);
-
- static void drawbox(GLdouble, GLdouble, GLdouble,
- GLdouble, GLdouble, GLdouble, GLenum);
- static void doughnut(GLdouble, GLdouble, GLint, GLint, GLenum);
- static void icosahedron(GLdouble *, GLdouble, GLenum);
- static void octahedron(GLdouble *, GLdouble, GLenum);
- static void tetrahedron(GLdouble *, GLdouble, GLenum);
- static void subdivide(int, GLdouble *, GLdouble *, GLdouble *,
- GLdouble *, GLdouble, GLenum, int);
- static void drawtriangle(int, int, int,
- GLdouble *, GLdouble, GLenum, int);
- static void recorditem(GLdouble *, GLdouble *, GLdouble *,
- GLdouble *, GLdouble, GLenum, int);
- static void initdodec(void);
- static void dodecahedron(GLdouble *, GLdouble, GLenum);
- static void pentagon(int, int, int, int, int, GLenum);
-
-
- /* Render wire frame or solid sphere. If no display list with
- * the current model size exists, create a new display list.
- */
- void auxWireSphere (GLdouble radius)
- {
- GLUquadricObj *quadObj;
- GLdouble *sizeArray;
- GLuint displayList;
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 1);
- *sizeArray = radius;
- displayList = findList (SPHEREWIRE, sizeArray, 1);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (SPHEREWIRE, sizeArray, 1),
- GL_COMPILE_AND_EXECUTE);
- quadObj = gluNewQuadric ();
- gluQuadricDrawStyle (quadObj, GLU_LINE);
- gluSphere (quadObj, radius, 16, 16);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- void auxSolidSphere (GLdouble radius)
- {
- GLUquadricObj *quadObj;
- GLdouble *sizeArray;
- GLuint displayList;
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 1);
- *sizeArray = radius;
- displayList = findList (SPHERESOLID, sizeArray, 1);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (SPHERESOLID, sizeArray, 1),
- GL_COMPILE_AND_EXECUTE);
- quadObj = gluNewQuadric ();
- gluQuadricDrawStyle (quadObj, GLU_FILL);
- gluQuadricNormals (quadObj, GLU_SMOOTH);
- gluSphere (quadObj, radius, 16, 16);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- /* Render wire frame or solid cube. If no display list with
- * the current model size exists, create a new display list.
- */
- void auxWireCube (GLdouble size)
- {
- GLdouble *sizeArray;
- GLuint displayList;
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 1);
- *sizeArray = size;
- displayList = findList (CUBEWIRE, sizeArray, 1);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (CUBEWIRE, sizeArray, 1),
- GL_COMPILE_AND_EXECUTE);
- drawbox(-size/2., size/2., -size/2., size/2.,
- -size/2., size/2., GL_LINE_LOOP);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- void auxSolidCube (GLdouble size)
- {
- GLdouble *sizeArray;
- GLuint displayList;
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 1);
- *sizeArray = size;
- displayList = findList (CUBESOLID, sizeArray, 1);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (CUBESOLID, sizeArray, 1),
- GL_COMPILE_AND_EXECUTE);
- drawbox(-size/2., size/2., -size/2., size/2.,
- -size/2., size/2., GL_QUADS);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- /* Render wire frame or solid cube. If no display list with
- * the current model size exists, create a new display list.
- */
- void auxWireBox (GLdouble width, GLdouble height, GLdouble depth)
- {
- GLdouble *sizeArray, *tmp;
- GLuint displayList;
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 3);
- tmp = sizeArray;
- *tmp++ = width;
- *tmp++ = height;
- *tmp++ = depth;
- displayList = findList (BOXWIRE, sizeArray, 3);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (BOXWIRE, sizeArray, 3),
- GL_COMPILE_AND_EXECUTE);
- drawbox(-width/2., width/2., -height/2., height/2.,
- -depth/2., depth/2., GL_LINE_LOOP);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- void auxSolidBox (GLdouble width, GLdouble height, GLdouble depth)
- {
- GLdouble *sizeArray, *tmp;
- GLuint displayList;
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 3);
- tmp = sizeArray;
- *tmp++ = width;
- *tmp++ = height;
- *tmp++ = depth;
- displayList = findList (BOXSOLID, sizeArray, 3);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (BOXSOLID, sizeArray, 3),
- GL_COMPILE_AND_EXECUTE);
- drawbox(-width/2., width/2., -height/2., height/2.,
- -depth/2., depth/2., GL_QUADS);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- /* Render wire frame or solid tori. If no display list with
- * the current model size exists, create a new display list.
- */
- void auxWireTorus (GLdouble innerRadius, GLdouble outerRadius)
- {
- GLdouble *sizeArray, *tmp;
- GLuint displayList;
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 2);
- tmp = sizeArray;
- *tmp++ = innerRadius;
- *tmp++ = outerRadius;
- displayList = findList (TORUSWIRE, sizeArray, 2);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (TORUSWIRE, sizeArray, 2),
- GL_COMPILE_AND_EXECUTE);
- doughnut(innerRadius, outerRadius, 5, 10, GL_LINE_LOOP);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- void auxSolidTorus (GLdouble innerRadius, GLdouble outerRadius)
- {
- GLdouble *sizeArray, *tmp;
- GLuint displayList;
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 2);
- tmp = sizeArray;
- *tmp++ = innerRadius;
- *tmp++ = outerRadius;
- displayList = findList (TORUSSOLID, sizeArray, 2);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (TORUSSOLID, sizeArray, 2),
- GL_COMPILE_AND_EXECUTE);
- doughnut(innerRadius, outerRadius, 8, 15, GL_QUADS);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- /* Render wire frame or solid cylinders. If no display list with
- * the current model size exists, create a new display list.
- */
- void auxWireCylinder (GLdouble radius, GLdouble height)
- {
- GLUquadricObj *quadObj;
- GLdouble *sizeArray, *tmp;
- GLuint displayList;
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 2);
- tmp = sizeArray;
- *tmp++ = radius;
- *tmp++ = height;
- displayList = findList (CYLINDERWIRE, sizeArray, 2);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (CYLINDERWIRE, sizeArray, 2),
- GL_COMPILE_AND_EXECUTE);
- glPushMatrix ();
- glRotatef (90.0, 1.0, 0.0, 0.0);
- glTranslatef (0.0, 0.0, -1.0);
- quadObj = gluNewQuadric ();
- gluQuadricDrawStyle (quadObj, GLU_LINE);
- gluCylinder (quadObj, radius, radius, height, 12, 2);
- glPopMatrix ();
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- void auxSolidCylinder (GLdouble radius, GLdouble height)
- {
- GLUquadricObj *quadObj;
- GLdouble *sizeArray, *tmp;
- GLuint displayList;
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 2);
- tmp = sizeArray;
- *tmp++ = radius;
- *tmp++ = height;
- displayList = findList (CYLINDERSOLID, sizeArray, 2);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (CYLINDERSOLID, sizeArray, 2),
- GL_COMPILE_AND_EXECUTE);
- glPushMatrix ();
- glRotatef (90.0, 1.0, 0.0, 0.0);
- glTranslatef (0.0, 0.0, -1.0);
- quadObj = gluNewQuadric ();
- gluQuadricDrawStyle (quadObj, GLU_FILL);
- gluQuadricNormals (quadObj, GLU_SMOOTH);
- gluCylinder (quadObj, radius, radius, height, 12, 2);
- glPopMatrix ();
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- /* Render wire frame or solid icosahedra. If no display list with
- * the current model size exists, create a new display list.
- */
- void auxWireIcosahedron (GLdouble radius)
- {
- GLdouble *sizeArray;
- GLuint displayList;
- static GLdouble center[3] = {0.0, 0.0, 0.0};
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 1);
- *sizeArray = radius;
- displayList = findList (ICOSAWIRE, sizeArray, 1);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (ICOSAWIRE, sizeArray, 1),
- GL_COMPILE_AND_EXECUTE);
- icosahedron (center, radius, GL_LINE_LOOP);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- void auxSolidIcosahedron (GLdouble radius)
- {
- GLdouble *sizeArray;
- GLuint displayList;
- static GLdouble center[3] = {0.0, 0.0, 0.0};
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 1);
- *sizeArray = radius;
- displayList = findList (ICOSASOLID, sizeArray, 1);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (ICOSASOLID, sizeArray, 1),
- GL_COMPILE_AND_EXECUTE);
- icosahedron (center, radius, GL_TRIANGLES);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- /* Render wire frame or solid octahedra. If no display list with
- * the current model size exists, create a new display list.
- */
- void auxWireOctahedron (GLdouble radius)
- {
- GLdouble *sizeArray;
- GLuint displayList;
- static GLdouble center[3] = {0.0, 0.0, 0.0};
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 1);
- *sizeArray = radius;
- displayList = findList (OCTAWIRE, sizeArray, 1);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (OCTAWIRE, sizeArray, 1),
- GL_COMPILE_AND_EXECUTE);
- octahedron (center, radius, GL_LINE_LOOP);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- void auxSolidOctahedron (GLdouble radius)
- {
- GLdouble *sizeArray;
- GLuint displayList;
- static GLdouble center[3] = {0.0, 0.0, 0.0};
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 1);
- *sizeArray = radius;
- displayList = findList (OCTASOLID, sizeArray, 1);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (OCTASOLID, sizeArray, 1),
- GL_COMPILE_AND_EXECUTE);
- octahedron (center, radius, GL_TRIANGLES);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- /* Render wire frame or solid tetrahedra. If no display list with
- * the current model size exists, create a new display list.
- */
- void auxWireTetrahedron (GLdouble radius)
- {
- GLdouble *sizeArray;
- GLuint displayList;
- static GLdouble center[3] = {0.0, 0.0, 0.0};
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 1);
- *sizeArray = radius;
- displayList = findList (TETRAWIRE, sizeArray, 1);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (TETRAWIRE, sizeArray, 1),
- GL_COMPILE_AND_EXECUTE);
- tetrahedron (center, radius, GL_LINE_LOOP);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- void auxSolidTetrahedron (GLdouble radius)
- {
- GLdouble *sizeArray;
- GLuint displayList;
- static GLdouble center[3] = {0.0, 0.0, 0.0};
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 1);
- *sizeArray = radius;
- displayList = findList (TETRASOLID, sizeArray, 1);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (TETRASOLID, sizeArray, 1),
- GL_COMPILE_AND_EXECUTE);
- tetrahedron (center, radius, GL_TRIANGLES);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- /* Render wire frame or solid dodecahedra. If no display list with
- * the current model size exists, create a new display list.
- */
- void auxWireDodecahedron (GLdouble radius)
- {
- GLdouble *sizeArray;
- GLuint displayList;
- static GLdouble center[3] = {0.0, 0.0, 0.0};
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 1);
- *sizeArray = radius;
- displayList = findList (DODECAWIRE, sizeArray, 1);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (DODECAWIRE, sizeArray, 1),
- GL_COMPILE_AND_EXECUTE);
- dodecahedron (center, radius/1.73, GL_LINE_LOOP);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- void auxSolidDodecahedron (GLdouble radius)
- {
- GLdouble *sizeArray;
- GLuint displayList;
- static GLdouble center[3] = {0.0, 0.0, 0.0};
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 1);
- *sizeArray = radius;
- displayList = findList (DODECASOLID, sizeArray, 1);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (DODECASOLID, sizeArray, 1),
- GL_COMPILE_AND_EXECUTE);
- dodecahedron (center, radius/1.73, GL_TRIANGLE_FAN);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- /* Render wire frame or solid cones. If no display list with
- * the current model size exists, create a new display list.
- */
- void auxWireCone (GLdouble base, GLdouble height)
- {
- GLUquadricObj *quadObj;
- GLdouble *sizeArray, *tmp;
- GLuint displayList;
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 2);
- tmp = sizeArray;
- *tmp++ = base;
- *tmp++ = height;
- displayList = findList (CONEWIRE, sizeArray, 2);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (CONEWIRE, sizeArray, 2),
- GL_COMPILE_AND_EXECUTE);
- quadObj = gluNewQuadric ();
- gluQuadricDrawStyle (quadObj, GLU_LINE);
- gluCylinder (quadObj, base, 0.0, height, 15, 10);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- void auxSolidCone (GLdouble base, GLdouble height)
- {
- GLUquadricObj *quadObj;
- GLdouble *sizeArray, *tmp;
- GLuint displayList;
-
- sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 2);
- tmp = sizeArray;
- *tmp++ = base;
- *tmp++ = height;
- displayList = findList (CONEWIRE, sizeArray, 2);
-
- if (displayList == 0) {
- glNewList(makeModelPtr (CONEWIRE, sizeArray, 2),
- GL_COMPILE_AND_EXECUTE);
- quadObj = gluNewQuadric ();
- gluQuadricDrawStyle (quadObj, GLU_FILL);
- gluQuadricNormals (quadObj, GLU_SMOOTH);
- gluCylinder (quadObj, base, 0.0, height, 15, 10);
- glEndList();
- }
- else {
- glCallList(displayList);
- free (sizeArray);
- }
- }
-
- /* Routines to build 3 dimensional solids, including:
- *
- * drawbox, doughnut, icosahedron,
- * octahedron, tetrahedron, dodecahedron.
- */
-
- /* drawbox:
- *
- * draws a rectangular box with the given x, y, and z ranges.
- * The box is axis-aligned.
- */
- static void drawbox(GLdouble x0, GLdouble x1, GLdouble y0, GLdouble y1,
- GLdouble z0, GLdouble z1, GLenum type)
- {
- static GLdouble 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 }
- };
- GLdouble v[8][3], tmp;
- GLint i;
-
- if (x0 > x1) {
- tmp = x0; x0 = x1; x1 = tmp;
- }
- if (y0 > y1) {
- tmp = y0; y0 = y1; y1 = tmp;
- }
- if (z0 > z1) {
- tmp = z0; z0 = z1; z1 = tmp;
- }
- v[0][0] = v[1][0] = v[2][0] = v[3][0] = x0;
- v[4][0] = v[5][0] = v[6][0] = v[7][0] = x1;
- v[0][1] = v[1][1] = v[4][1] = v[5][1] = y0;
- v[2][1] = v[3][1] = v[6][1] = v[7][1] = y1;
- v[0][2] = v[3][2] = v[4][2] = v[7][2] = z0;
- v[1][2] = v[2][2] = v[5][2] = v[6][2] = z1;
-
- for (i = 0; i < 6; i++) {
- glBegin(type);
- glNormal3dv(&n[i][0]);
- glVertex3dv(&v[faces[i][0]][0]);
- glNormal3dv(&n[i][0]);
- glVertex3dv(&v[faces[i][1]][0]);
- glNormal3dv(&n[i][0]);
- glVertex3dv(&v[faces[i][2]][0]);
- glNormal3dv(&n[i][0]);
- glVertex3dv(&v[faces[i][3]][0]);
- glEnd();
- }
- }
-
- /* doughnut:
- *
- * draws a doughnut, centered at (0, 0, 0) whose axis is aligned with
- * the z-axis. The doughnut's major radius is R, and minor radius is r.
- */
-
- static void doughnut(GLdouble r, GLdouble R, GLint nsides, GLint rings, GLenum type)
- {
- int i, j;
- GLdouble theta, phi, theta1, phi1;
- GLdouble p0[03], p1[3], p2[3], p3[3];
- GLdouble n0[3], n1[3], n2[3], n3[3];
-
- for (i = 0; i < rings; i++) {
- theta = (GLdouble)i*2.0*PI/rings;
- theta1 = (GLdouble)(i+1)*2.0*PI/rings;
- for (j = 0; j < nsides; j++) {
- phi = (GLdouble)j*2.0*PI/nsides;
- phi1 = (GLdouble)(j+1)*2.0*PI/nsides;
-
- p0[0] = cos(theta)*(R + r*cos(phi));
- p0[1] = -sin(theta)*(R + r*cos(phi));
- p0[2] = r*sin(phi);
-
- p1[0] = cos(theta1)*(R + r*cos(phi));
- p1[1] = -sin(theta1)*(R + r*cos(phi));
- p1[2] = r*sin(phi);
-
- p2[0] = cos(theta1)*(R + r*cos(phi1));
- p2[1] = -sin(theta1)*(R + r*cos(phi1));
- p2[2] = r*sin(phi1);
-
- p3[0] = cos(theta)*(R + r*cos(phi1));
- p3[1] = -sin(theta)*(R + r*cos(phi1));
- p3[2] = r*sin(phi1);
-
- n0[0] = cos(theta)*(cos(phi));
- n0[1] = -sin(theta)*(cos(phi));
- n0[2] = sin(phi);
-
- n1[0] = cos(theta1)*(cos(phi));
- n1[1] = -sin(theta1)*(cos(phi));
- n1[2] = sin(phi);
-
- n2[0] = cos(theta1)*(cos(phi1));
- n2[1] = -sin(theta1)*(cos(phi1));
- n2[2] = sin(phi1);
-
- n3[0] = cos(theta)*(cos(phi1));
- n3[1] = -sin(theta)*(cos(phi1));
- n3[2] = sin(phi1);
-
- m_xformpt(p0, p0, n0, n0);
- m_xformpt(p1, p1, n1, n1);
- m_xformpt(p2, p2, n2, n2);
- m_xformpt(p3, p3, n3, n3);
-
- glBegin(type);
- glNormal3dv(n3);
- glVertex3dv(p3);
- glNormal3dv(n2);
- glVertex3dv(p2);
- glNormal3dv(n1);
- glVertex3dv(p1);
- glNormal3dv(n0);
- glVertex3dv(p0);
- glEnd();
- }
- }
- }
-
- /* octahedron data: The octahedron produced is centered
- * at the origin and has radius 1.0
- */
- static GLdouble 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}
- };
-
- /* tetrahedron data: */
-
- #define T 1.73205080756887729
-
- static GLdouble 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}
- };
-
- /* icosahedron data: These numbers are rigged to
- * make an icosahedron of radius 1.0
- */
-
- #define X .525731112119133606
- #define Z .850650808352039932
-
- static GLdouble idata[12][3] = {
- {-X, 0.0, Z},
- {X, 0.0, Z},
- {-X, 0.0, -Z},
- {X, 0.0, -Z},
- {0.0, Z, X},
- {0.0, Z, -X},
- {0.0, -Z, X},
- {0.0, -Z, -X},
- {Z, X, 0.0},
- {-Z, X, 0.0},
- {Z, -X, 0.0},
- {-Z, -X, 0.0},
- };
-
- static int iindex[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},
- };
-
- /* icosahedron:
- *
- * Draws an icosahedron with center at p0 having the
- * given radius.
- */
-
- static void icosahedron(GLdouble p0[3], GLdouble radius, GLenum shadeType)
- {
- int i;
-
- for (i = 0; i < 20; i++)
- drawtriangle(i, 0, 1, p0, radius, shadeType, 0);
- }
-
- /* octahedron:
- *
- * Draws an octahedron with center at p0 having the
- * given radius.
- */
- static void octahedron(GLdouble p0[3], GLdouble radius, GLenum shadeType)
- {
- int i;
-
- for (i = 0; i < 8; i++)
- drawtriangle(i, 1, 1, p0, radius, shadeType, 0);
- }
-
- /* tetrahedron:
- *
- * Draws an tetrahedron with center at p0 having the
- * given radius.
- */
-
- static void tetrahedron(GLdouble p0[3], GLdouble radius, GLenum shadeType)
- {
- int i;
-
- for (i = 0; i < 4; i++)
- drawtriangle(i, 2, 1, p0, radius, shadeType, 0);
- }
-
- static void subdivide(int depth, GLdouble *v0, GLdouble *v1, GLdouble *v2,
- GLdouble p0[3], GLdouble radius, GLenum shadeType, int avnormal)
- {
- GLdouble w0[3], w1[3], w2[3];
- GLdouble l;
- int i, j, k, n;
-
- 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, p0, radius, shadeType, avnormal);
- }
- for (i = 0; i < depth-1; i++)
- for (j = 0; i + j < depth-1; j++) {
- k = depth - i - j;
- for (n = 0; n < 3; n++) {
- w0[n] = ((i+1)*v0[n] + (j+1)*v1[n] + (k-2)*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(w0, w1, w2, p0, radius, shadeType, avnormal);
- }
- }
-
- static void drawtriangle(int i, int geomType, int depth,
- GLdouble p0[3], GLdouble radius, GLenum shadeType, int avnormal)
- {
- GLdouble *x0, *x1, *x2;
-
- switch (geomType) {
- case 0: /* icosahedron */
- x0 = &idata[iindex[i][0]][0];
- x1 = &idata[iindex[i][1]][0];
- x2 = &idata[iindex[i][2]][0];
- break;
- case 1: /* octahedron */
- x0 = &odata[ondex[i][0]][0];
- x1 = &odata[ondex[i][1]][0];
- x2 = &odata[ondex[i][2]][0];
- break;
- case 2: /* tetrahedron */
- x0 = &tdata[tndex[i][0]][0];
- x1 = &tdata[tndex[i][1]][0];
- x2 = &tdata[tndex[i][2]][0];
- break;
- }
- subdivide(depth, x0, x1, x2, p0, radius, shadeType, avnormal);
- }
-
- static void recorditem(GLdouble *n1, GLdouble *n2, GLdouble *n3,
- GLdouble center[3], GLdouble radius, GLenum shadeType, int avnormal)
- {
- GLdouble p1[3], p2[3], p3[3], q0[3], q1[3], n11[3], n22[3], n33[3];
- int i;
-
- for (i = 0; i < 3; i++) {
- p1[i] = n1[i]*radius + center[i];
- p2[i] = n2[i]*radius + center[i];
- p3[i] = n3[i]*radius + center[i];
- }
- if (avnormal == 0) {
- diff3(p1, p2, q0);
- diff3(p2, p3, q1);
- crossprod(q0, q1, q1);
- normalize(q1);
- m_xformpt(p1, p1, q1, n11);
- m_xformptonly(p2, p2);
- m_xformptonly(p3, p3);
-
- glBegin (shadeType);
- glNormal3dv(n11);
- glVertex3dv(p1);
- glVertex3dv(p2);
- glVertex3dv(p3);
- glEnd();
- return;
- }
- m_xformpt(p1, p1, n1, n11);
- m_xformpt(p2, p2, n2, n22);
- m_xformpt(p3, p3, n3, n33);
-
- glBegin (shadeType);
- glNormal3dv(n11);
- glVertex3dv(p1);
- glNormal3dv(n22);
- glVertex3dv(p2);
- glNormal3dv(n33);
- glVertex3dv(p3);
- glEnd();
- }
-
- static GLdouble dodec[20][3];
-
- static void initdodec()
- {
- GLdouble 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))));
- 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;
- }
-
- /* dodecahedron:
- *
- * Draws an dodecahedron with center at 0.0. The radius
- * is sqrt(3).
- */
- static void dodecahedron(GLdouble center[3], GLdouble sc, GLenum type)
- {
- static int inited = 0;
-
- if ( inited == 0) {
- inited = 1;
- initdodec();
- }
- m_pushmatrix();
- m_translate(center[0], center[1], center[2]);
- m_scale(sc, sc, sc);
- 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);
- m_popmatrix();
- }
-
- static void pentagon(int a, int b, int c, int d, int e, GLenum shadeType)
- {
- GLdouble n0[3], d1[3], d2[3], d3[3], d4[3], d5[3], nout[3];
-
- diff3(&dodec[a][0], &dodec[b][0], d1);
- diff3(&dodec[b][0], &dodec[c][0], d2);
- crossprod(d1, d2, n0);
- normalize(n0);
- m_xformpt(&dodec[a][0], d1, n0, nout);
- m_xformptonly(&dodec[b][0], d2);
- m_xformptonly(&dodec[c][0], d3);
- m_xformptonly(&dodec[d][0], d4);
- m_xformptonly(&dodec[e][0], d5);
-
- glBegin (shadeType);
- glNormal3dv(nout);
- glVertex3dv(d1);
- glVertex3dv(d2);
- glVertex3dv(d3);
- glVertex3dv(d4);
- glVertex3dv(d5);
- glEnd();
- }
-
- /* linked lists--display lists for each different
- * type of geometric objects. The linked list is
- * searched, until an object of the requested
- * size is found. If no geometric object of that size
- * has been previously made, a new one is created.
- */
- GLuint findList (int lindex, GLdouble *paramArray, int size)
- {
- MODELPTR endList;
- int found = 0;
-
- endList = lists[lindex];
- while (endList != NULL) {
- if (compareParams (endList->params, paramArray, size))
- return (endList->list);
- endList = endList->ptr;
- }
- /* if not found, return 0 and calling routine should
- * make a new list
- */
- return (0);
- }
-
- int compareParams (GLdouble *oneArray, GLdouble *twoArray, int size)
- {
- int i;
- int matches = 1;
-
- for (i = 0; (i < size) && matches; i++) {
- if (*oneArray++ != *twoArray++)
- matches = 0;
- }
- return (matches);
- }
-
- GLuint makeModelPtr (int lindex, GLdouble *sizeArray, int count)
- {
- MODELPTR newModel;
-
- newModel = (MODELPTR) malloc (sizeof (MODEL));
- newModel->list = glGenLists (1);
- newModel->numParam = count;
- newModel->params = sizeArray;
- newModel->ptr = lists[lindex];
- lists[lindex] = newModel;
-
- return (newModel->list);
- }
-