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])))
55 #define glRotated glRotatef
56 #define glTranslated glTranslatef
59 * These global variables control which object is drawn,
60 * and how it is drawn. No object uses all of these
63 static int function_index;
64 static int slices = 16;
65 static int stacks = 16;
66 static double irad = .25;
67 static double orad = 1.0; /* doubles as size for objects other than Torus */
69 static double offset[ 3 ] = { 0, 0, 0 };
70 static GLboolean show_info = GL_TRUE;
72 static GLboolean persProject = GL_TRUE;
75 * These one-liners draw particular objects, fetching appropriate
76 * information from the above globals. They are just thin wrappers
77 * for the FreeGLUT objects.
79 static void drawSolidTetrahedron(void) { glutSolidTetrahedron (); }
80 static void drawWireTetrahedron(void) { glutWireTetrahedron (); }
81 static void drawSolidCube(void) { glutSolidCube(orad); } /* orad doubles as size input */
82 static void drawWireCube(void) { glutWireCube(orad); } /* orad doubles as size input */
83 static void drawSolidOctahedron(void) { glutSolidOctahedron (); }
84 static void drawWireOctahedron(void) { glutWireOctahedron (); }
85 static void drawSolidDodecahedron(void) { glutSolidDodecahedron (); }
86 static void drawWireDodecahedron(void) { glutWireDodecahedron (); }
87 static void drawSolidRhombicDodecahedron(void) { glutSolidRhombicDodecahedron (); }
88 static void drawWireRhombicDodecahedron(void) { glutWireRhombicDodecahedron (); }
89 static void drawSolidIcosahedron(void) { glutSolidIcosahedron (); }
90 static void drawWireIcosahedron(void) { glutWireIcosahedron (); }
91 static void drawSolidSierpinskiSponge(void) { glutSolidSierpinskiSponge (depth, offset, orad);} /* orad doubles as size input */
92 static void drawWireSierpinskiSponge(void) { glutWireSierpinskiSponge (depth, offset, orad); } /* orad doubles as size input */
93 static void drawSolidSphere(void) { glutSolidSphere(orad,slices,stacks); } /* orad doubles as size input */
94 static void drawWireSphere(void) { glutWireSphere(orad,slices,stacks); } /* orad doubles as size input */
95 #ifndef EGL_VERSION_1_0
96 static void drawSolidTorus(void) { glutSolidTorus(irad,orad,slices,stacks); }
97 static void drawWireTorus(void) { glutWireTorus (irad,orad,slices,stacks); }
98 static void drawSolidCone(void) { glutSolidCone(orad,orad,slices,stacks); } /* orad doubles as size input */
99 static void drawWireCone(void) { glutWireCone(orad,orad,slices,stacks); } /* orad doubles as size input */
100 static void drawSolidCylinder(void) { glutSolidCylinder(orad,orad,slices,stacks); } /* orad doubles as size input */
101 static void drawWireCylinder(void) { glutWireCylinder(orad,orad,slices,stacks); } /* orad doubles as size input */
105 * This structure defines an entry in our function-table.
109 const char * const name;
110 void (*solid) (void);
114 #define ENTRY(e) {#e, drawSolid##e, drawWire##e}
115 static const entry table [] =
120 ENTRY (Dodecahedron),
121 ENTRY (RhombicDodecahedron),
123 ENTRY (SierpinskiSponge),
129 Does printf()-like work using freeglut
130 glutBitmapString(). Uses a fixed font. Prints
131 at the indicated row/column position.
133 Limitation: Cannot address pixels.
134 Limitation: Renders in screen coords, not model coords.
136 static void shapesPrintf (int row, int col, const char *fmt, ...)
140 /* GLUT callback Handlers */
143 resize(int width, int height)
145 ar = (float) width / (float) height;
147 glViewport(0, 0, width, height);
150 static void display(void)
152 const double t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
153 const double a = t*90.0;
155 glMatrixMode(GL_PROJECTION);
157 glFrustumf(-ar, ar, -1.0, 1.0, 2.0, 100.0);
158 glMatrixMode(GL_MODELVIEW);
161 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
163 glEnable(GL_LIGHTING);
168 glTranslated(0,1.2,-6);
171 table [function_index].solid ();
175 glTranslated(0,-1.2,-6);
178 table [function_index].wire ();
181 glDisable(GL_LIGHTING);
182 glColor4f(0.1,0.1,0.4,1.0);
189 key(unsigned char key, int x, int y)
195 case 'q': glutLeaveMainLoop () ; break;
198 case 'i': show_info = ( show_info == GL_TRUE ) ? GL_FALSE : GL_TRUE; break;
201 case '+': slices++; printf("%d,%d\n", slices, stacks); break;
204 case '_': if( slices > -1 ) slices--; break;
207 case '<': if( stacks > -1 ) stacks--; break;
210 case '>': stacks++; break;
213 case '(': if( depth > -1 ) depth--; break;
216 case ')': ++depth; break;
219 case 'p': persProject=!persProject; break;
228 static void special (int key, int x, int y)
232 case GLUT_KEY_PAGE_UP: ++function_index; break;
233 case GLUT_KEY_PAGE_DOWN: --function_index; break;
234 case GLUT_KEY_UP: orad *= 2; break;
235 case GLUT_KEY_DOWN: orad /= 2; break;
237 case GLUT_KEY_RIGHT: irad *= 2; break;
238 case GLUT_KEY_LEFT: irad /= 2; break;
244 if (0 > function_index)
245 function_index = NUMBEROF (table) - 1;
247 if (NUMBEROF (table) <= ( unsigned )function_index)
259 onMouseClick(int button, int state, int x, int y) {
260 if (state == GLUT_DOWN)
261 special(GLUT_KEY_PAGE_DOWN, 0, 0);
264 const GLfloat light_ambient[] = { 0.0f, 0.0f, 0.0f, 1.0f };
265 const GLfloat light_diffuse[] = { 1.0f, 1.0f, 1.0f, 1.0f };
266 const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
267 const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f };
269 const GLfloat mat_ambient[] = { 0.7f, 0.7f, 0.7f, 1.0f };
270 const GLfloat mat_diffuse[] = { 0.8f, 0.8f, 0.8f, 1.0f };
271 const GLfloat mat_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
272 const GLfloat high_shininess[] = { 100.0f };
274 /* Program entry point */
277 main(int argc, char *argv[])
279 glutInitWindowSize(640,480);
280 glutInitWindowPosition(40,40);
281 glutInit(&argc, argv);
282 glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_MULTISAMPLE);
284 glutCreateWindow("FreeGLUT Shapes");
286 glutReshapeFunc(resize);
287 glutDisplayFunc(display);
288 glutKeyboardFunc(key);
289 glutSpecialFunc(special);
291 glutMouseFunc(onMouseClick);
293 glutSetOption ( GLUT_ACTION_ON_WINDOW_CLOSE, GLUT_ACTION_CONTINUE_EXECUTION ) ;
295 glClearColor(1,1,1,1);
296 glEnable(GL_CULL_FACE);
299 glEnable(GL_DEPTH_TEST);
300 glDepthFunc(GL_LESS);
303 glEnable(GL_NORMALIZE);
304 glEnable(GL_COLOR_MATERIAL);
306 glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
307 glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
308 glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
309 glLightfv(GL_LIGHT0, GL_POSITION, light_position);
311 glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
312 glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
313 glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
314 glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);
319 /* DUMP MEMORY LEAK INFORMATION */
320 _CrtDumpMemoryLeaks () ;