4 This program is a test harness for the various shapes
5 in OpenGLUT. It may also be useful to see which
6 parameters control what behavior in the OpenGLUT
9 Spinning wireframe and solid-shaded shapes are
10 displayed. Some parameters can be adjusted.
13 - <tt>Esc </tt> Quit
14 - <tt>q Q </tt> Quit
15 - <tt>i I </tt> Show info
16 - <tt>p P </tt> Toggle perspective or orthographic projection
17 - <tt>= + </tt> Increase \a slices
18 - <tt>- _ </tt> Decreate \a slices
19 - <tt>, < </tt> Decreate \a stacks
20 - <tt>. > </tt> Increase \a stacks
21 - <tt>9 ( </tt> Decreate \a depth (Sierpinski Sponge)
22 - <tt>0 ) </tt> Increase \a depth (Sierpinski Sponge)
23 - <tt>up </tt> Increase "outer radius"
24 - <tt>down </tt> Decrease "outer radius"
25 - <tt>left </tt> Decrease "inner radius"
26 - <tt>right</tt> Increase "inner radius"
27 - <tt>PgUp </tt> Next shape-drawing function
28 - <tt>PgDn </tt> Prev shape-drawing function
30 \author Written by Nigel Stewart November 2003
32 \author Portions Copyright (C) 2004, the OpenGLUT project contributors. <br>
33 OpenGLUT branched from freeglut in February, 2004.
35 \image html openglut_shapes.png OpenGLUT Geometric Shapes Demonstration
36 \include demos/shapes/shapes.c
39 #include <GL/freeglut.h>
46 /* DUMP MEMORY LEAKS */
51 * This macro is only intended to be used on arrays, of course.
53 #define NUMBEROF(x) ((sizeof(x))/(sizeof(x[0])))
56 * These global variables control which object is drawn,
57 * and how it is drawn. No object uses all of these
60 static int function_index;
61 static int slices = 16;
62 static int stacks = 16;
63 static double irad = .25;
64 static double orad = 1.0; /* doubles as size for objects other than Torus */
66 static double offset[ 3 ] = { 0, 0, 0 };
67 static GLboolean show_info = GL_TRUE;
69 static GLboolean persProject = GL_TRUE;
72 * These one-liners draw particular objects, fetching appropriate
73 * information from the above globals. They are just thin wrappers
74 * for the FreeGLUT objects.
76 static void drawSolidTetrahedron(void) { glutSolidTetrahedron (); }
77 static void drawWireTetrahedron(void) { glutWireTetrahedron (); }
78 static void drawSolidCube(void) { glutSolidCube(orad); } /* orad doubles as size input */
79 static void drawWireCube(void) { glutWireCube(orad); } /* orad doubles as size input */
80 static void drawSolidOctahedron(void) { glutSolidOctahedron (); }
81 static void drawWireOctahedron(void) { glutWireOctahedron (); }
82 static void drawSolidDodecahedron(void) { glutSolidDodecahedron (); }
83 static void drawWireDodecahedron(void) { glutWireDodecahedron (); }
84 static void drawSolidRhombicDodecahedron(void) { glutSolidRhombicDodecahedron (); }
85 static void drawWireRhombicDodecahedron(void) { glutWireRhombicDodecahedron (); }
86 static void drawSolidIcosahedron(void) { glutSolidIcosahedron (); }
87 static void drawWireIcosahedron(void) { glutWireIcosahedron (); }
88 static void drawSolidSierpinskiSponge(void) { glutSolidSierpinskiSponge (depth, offset, orad);} /* orad doubles as size input */
89 static void drawWireSierpinskiSponge(void) { glutWireSierpinskiSponge (depth, offset, orad); } /* orad doubles as size input */
90 static void drawSolidTorus(void) { glutSolidTorus(irad,orad,slices,stacks); }
91 static void drawWireTorus(void) { glutWireTorus (irad,orad,slices,stacks); }
92 static void drawSolidSphere(void) { glutSolidSphere(orad,slices,stacks); } /* orad doubles as size input */
93 static void drawWireSphere(void) { glutWireSphere(orad,slices,stacks); } /* orad doubles as size input */
94 static void drawSolidCone(void) { glutSolidCone(orad,orad,slices,stacks); } /* orad doubles as size input */
95 static void drawWireCone(void) { glutWireCone(orad,orad,slices,stacks); } /* orad doubles as size input */
96 static void drawSolidCylinder(void) { glutSolidCylinder(orad,orad,slices,stacks); } /* orad doubles as size input */
97 static void drawWireCylinder(void) { glutWireCylinder(orad,orad,slices,stacks); } /* orad doubles as size input */
98 static void drawSolidTeapot(void)
100 /* per Glut manpage, it should be noted that the teapot is rendered
101 * with clockwise winding for front facing polygons...
104 glutSolidTeapot(orad); /* orad doubles as size input */
107 static void drawWireTeapot(void)
109 /* per Glut manpage, it should be noted that the teapot is rendered
110 * with clockwise winding for front facing polygons...
113 glutWireTeapot(orad); /* orad doubles as size input */
119 static void drawSolidCuboctahedron(void)
121 glBegin( GL_TRIANGLES );
122 glNormal3d( 0.577350269189, 0.577350269189, 0.577350269189); glVertex3d( RADIUS, RADIUS, 0.0 ); glVertex3d( 0.0, RADIUS, RADIUS ); glVertex3d( RADIUS, 0.0, RADIUS );
123 glNormal3d( 0.577350269189, 0.577350269189,-0.577350269189); glVertex3d( RADIUS, RADIUS, 0.0 ); glVertex3d( RADIUS, 0.0,-RADIUS ); glVertex3d( 0.0, RADIUS,-RADIUS );
124 glNormal3d( 0.577350269189,-0.577350269189, 0.577350269189); glVertex3d( RADIUS,-RADIUS, 0.0 ); glVertex3d( RADIUS, 0.0, RADIUS ); glVertex3d( 0.0,-RADIUS, RADIUS );
125 glNormal3d( 0.577350269189,-0.577350269189,-0.577350269189); glVertex3d( RADIUS,-RADIUS, 0.0 ); glVertex3d( 0.0,-RADIUS,-RADIUS ); glVertex3d( RADIUS, 0.0,-RADIUS );
126 glNormal3d(-0.577350269189, 0.577350269189, 0.577350269189); glVertex3d(-RADIUS, RADIUS, 0.0 ); glVertex3d(-RADIUS, 0.0, RADIUS ); glVertex3d( 0.0, RADIUS, RADIUS );
127 glNormal3d(-0.577350269189, 0.577350269189,-0.577350269189); glVertex3d(-RADIUS, RADIUS, 0.0 ); glVertex3d( 0.0, RADIUS,-RADIUS ); glVertex3d(-RADIUS, 0.0,-RADIUS );
128 glNormal3d(-0.577350269189,-0.577350269189, 0.577350269189); glVertex3d(-RADIUS,-RADIUS, 0.0 ); glVertex3d( 0.0,-RADIUS, RADIUS ); glVertex3d(-RADIUS, 0.0, RADIUS );
129 glNormal3d(-0.577350269189,-0.577350269189,-0.577350269189); glVertex3d(-RADIUS,-RADIUS, 0.0 ); glVertex3d(-RADIUS, 0.0,-RADIUS ); glVertex3d( 0.0,-RADIUS,-RADIUS );
133 glNormal3d( 1.0, 0.0, 0.0 ); glVertex3d( RADIUS, RADIUS, 0.0 ); glVertex3d( RADIUS, 0.0, RADIUS ); glVertex3d( RADIUS,-RADIUS, 0.0 ); glVertex3d( RADIUS, 0.0,-RADIUS );
134 glNormal3d(-1.0, 0.0, 0.0 ); glVertex3d(-RADIUS, RADIUS, 0.0 ); glVertex3d(-RADIUS, 0.0,-RADIUS ); glVertex3d(-RADIUS,-RADIUS, 0.0 ); glVertex3d(-RADIUS, 0.0, RADIUS );
135 glNormal3d( 0.0, 1.0, 0.0 ); glVertex3d( RADIUS, RADIUS, 0.0 ); glVertex3d( 0.0, RADIUS,-RADIUS ); glVertex3d(-RADIUS, RADIUS, 0.0 ); glVertex3d( 0.0, RADIUS, RADIUS );
136 glNormal3d( 0.0,-1.0, 0.0 ); glVertex3d( RADIUS,-RADIUS, 0.0 ); glVertex3d( 0.0,-RADIUS, RADIUS ); glVertex3d(-RADIUS,-RADIUS, 0.0 ); glVertex3d( 0.0,-RADIUS,-RADIUS );
137 glNormal3d( 0.0, 0.0, 1.0 ); glVertex3d( RADIUS, 0.0, RADIUS ); glVertex3d( 0.0, RADIUS, RADIUS ); glVertex3d(-RADIUS, 0.0, RADIUS ); glVertex3d( 0.0,-RADIUS, RADIUS );
138 glNormal3d( 0.0, 0.0,-1.0 ); glVertex3d( RADIUS, 0.0,-RADIUS ); glVertex3d( 0.0,-RADIUS,-RADIUS ); glVertex3d(-RADIUS, 0.0,-RADIUS ); glVertex3d( 0.0, RADIUS,-RADIUS );
142 static void drawWireCuboctahedron(void)
144 glBegin( GL_LINE_LOOP );
145 glNormal3d( 1.0, 0.0, 0.0 ); glVertex3d( RADIUS, RADIUS, 0.0 ); glVertex3d( RADIUS, 0.0, RADIUS ); glVertex3d( RADIUS,-RADIUS, 0.0 ); glVertex3d( RADIUS, 0.0,-RADIUS );
147 glBegin( GL_LINE_LOOP );
148 glNormal3d(-1.0, 0.0, 0.0 ); glVertex3d(-RADIUS, RADIUS, 0.0 ); glVertex3d(-RADIUS, 0.0,-RADIUS ); glVertex3d(-RADIUS,-RADIUS, 0.0 ); glVertex3d(-RADIUS, 0.0, RADIUS );
150 glBegin( GL_LINE_LOOP );
151 glNormal3d( 0.0, 1.0, 0.0 ); glVertex3d( RADIUS, RADIUS, 0.0 ); glVertex3d( 0.0, RADIUS,-RADIUS ); glVertex3d(-RADIUS, RADIUS, 0.0 ); glVertex3d( 0.0, RADIUS, RADIUS );
153 glBegin( GL_LINE_LOOP );
154 glNormal3d( 0.0,-1.0, 0.0 ); glVertex3d( RADIUS,-RADIUS, 0.0 ); glVertex3d( 0.0,-RADIUS, RADIUS ); glVertex3d(-RADIUS,-RADIUS, 0.0 ); glVertex3d( 0.0,-RADIUS,-RADIUS );
156 glBegin( GL_LINE_LOOP );
157 glNormal3d( 0.0, 0.0, 1.0 ); glVertex3d( RADIUS, 0.0, RADIUS ); glVertex3d( 0.0, RADIUS, RADIUS ); glVertex3d(-RADIUS, 0.0, RADIUS ); glVertex3d( 0.0,-RADIUS, RADIUS );
159 glBegin( GL_LINE_LOOP );
160 glNormal3d( 0.0, 0.0,-1.0 ); glVertex3d( RADIUS, 0.0,-RADIUS ); glVertex3d( 0.0,-RADIUS,-RADIUS ); glVertex3d(-RADIUS, 0.0,-RADIUS ); glVertex3d( 0.0, RADIUS,-RADIUS );
167 * This structure defines an entry in our function-table.
171 const char * const name;
172 void (*solid) (void);
176 #define ENTRY(e) {#e, drawSolid##e, drawWire##e}
177 static const entry table [] =
182 ENTRY (Dodecahedron),
183 ENTRY (RhombicDodecahedron),
185 ENTRY (SierpinskiSponge),
191 ENTRY (Cuboctahedron)
196 Does printf()-like work using freeglut
197 glutBitmapString(). Uses a fixed font. Prints
198 at the indicated row/column position.
200 Limitation: Cannot address pixels.
201 Limitation: Renders in screen coords, not model coords.
203 static void shapesPrintf (int row, int col, const char *fmt, ...)
205 static char buf[256];
207 void *font = GLUT_BITMAP_9_BY_15;
211 #if defined(WIN32) && !defined(__CYGWIN__)
212 (void) _vsnprintf (buf, sizeof(buf), fmt, args);
214 (void) vsnprintf (buf, sizeof(buf), fmt, args);
218 glGetIntegerv(GL_VIEWPORT,viewport);
223 glMatrixMode(GL_PROJECTION);
227 glOrtho(0,viewport[2],0,viewport[3],-1,1);
231 glutBitmapWidth(font, ' ') * col,
232 - glutBitmapHeight(font) * row + viewport[3]
234 glutBitmapString (font, (unsigned char*)buf);
237 glMatrixMode(GL_MODELVIEW);
241 /* GLUT callback Handlers */
244 resize(int width, int height)
246 ar = (float) width / (float) height;
248 glViewport(0, 0, width, height);
251 static void display(void)
253 const double t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
254 const double a = t*90.0;
256 glMatrixMode(GL_PROJECTION);
259 glFrustum(-ar, ar, -1.0, 1.0, 2.0, 100.0);
261 glOrtho(-ar*3, ar*3, -3.0, 3.0, 2.0, 100.0);
262 glMatrixMode(GL_MODELVIEW);
265 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
267 glEnable(GL_LIGHTING);
272 glTranslated(0,1.2,-6);
275 table [function_index].solid ();
279 glTranslated(0,-1.2,-6);
282 table [function_index].wire ();
285 glDisable(GL_LIGHTING);
286 glColor3d(0.1,0.1,0.4);
289 shapesPrintf (1, 1, "Shape PgUp PgDn: %s", table [function_index].name);
290 shapesPrintf (2, 1, "Slices +-: %d Stacks <>: %d", slices, stacks);
291 shapesPrintf (3, 1, "nSides +-: %d nRings <>: %d", slices, stacks);
292 shapesPrintf (4, 1, "Depth (): %d", depth);
293 shapesPrintf (5, 1, "Outer radius Up Down : %f", orad);
294 shapesPrintf (6, 1, "Inner radius Left Right: %f", irad);
296 printf ( "Shape %d slides %d stacks %d\n", function_index, slices, stacks ) ;
304 key(unsigned char key, int x, int y)
310 case 'q': glutLeaveMainLoop () ; break;
313 case 'i': show_info = ( show_info == GL_TRUE ) ? GL_FALSE : GL_TRUE; break;
316 case '+': slices++; break;
319 case '_': if( slices > -1 ) slices--; break;
322 case '<': if( stacks > -1 ) stacks--; break;
325 case '>': stacks++; break;
328 case '(': if( depth > -1 ) depth--; break;
331 case ')': ++depth; break;
334 case 'p': persProject=!persProject; break;
343 static void special (int key, int x, int y)
347 case GLUT_KEY_PAGE_UP: ++function_index; break;
348 case GLUT_KEY_PAGE_DOWN: --function_index; break;
349 case GLUT_KEY_UP: orad *= 2; break;
350 case GLUT_KEY_DOWN: orad /= 2; break;
352 case GLUT_KEY_RIGHT: irad *= 2; break;
353 case GLUT_KEY_LEFT: irad /= 2; break;
359 if (0 > function_index)
360 function_index = NUMBEROF (table) - 1;
362 if (NUMBEROF (table) <= ( unsigned )function_index)
373 const GLfloat light_ambient[] = { 0.0f, 0.0f, 0.0f, 1.0f };
374 const GLfloat light_diffuse[] = { 1.0f, 1.0f, 1.0f, 1.0f };
375 const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
376 const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f };
378 const GLfloat mat_ambient[] = { 0.7f, 0.7f, 0.7f, 1.0f };
379 const GLfloat mat_diffuse[] = { 0.8f, 0.8f, 0.8f, 1.0f };
380 const GLfloat mat_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
381 const GLfloat high_shininess[] = { 100.0f };
383 /* Program entry point */
386 main(int argc, char *argv[])
388 glutInitWindowSize(640,480);
389 glutInitWindowPosition(40,40);
390 glutInit(&argc, argv);
391 glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_MULTISAMPLE);
393 glutCreateWindow("FreeGLUT Shapes");
395 glutReshapeFunc(resize);
396 glutDisplayFunc(display);
397 glutKeyboardFunc(key);
398 glutSpecialFunc(special);
401 glutSetOption ( GLUT_ACTION_ON_WINDOW_CLOSE, GLUT_ACTION_CONTINUE_EXECUTION ) ;
403 glClearColor(1,1,1,1);
404 glEnable(GL_CULL_FACE);
407 glEnable(GL_DEPTH_TEST);
408 glDepthFunc(GL_LESS);
411 glEnable(GL_NORMALIZE);
412 glEnable(GL_COLOR_MATERIAL);
414 glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
415 glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
416 glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
417 glLightfv(GL_LIGHT0, GL_POSITION, light_position);
419 glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
420 glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
421 glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
422 glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);
427 /* DUMP MEMORY LEAK INFORMATION */
428 _CrtDumpMemoryLeaks () ;