+/*! \file shapes.c
+ \ingroup demos
+
+ This program is a test harness for the various shapes
+ in OpenGLUT. It may also be useful to see which
+ parameters control what behavior in the OpenGLUT
+ objects.
+
+ Spinning wireframe and solid-shaded shapes are
+ displayed. Some parameters can be adjusted.
+
+ Keys:
+ - <tt>Esc </tt> Quit
+ - <tt>q Q </tt> Quit
+ - <tt>i I </tt> Show info
+ - <tt>p P </tt> Toggle perspective or orthographic projection
+ - <tt>r R </tt> Toggle fixed or animated rotation around model X-axis
+ - <tt>= + </tt> Increase \a slices
+ - <tt>- _ </tt> Decreate \a slices
+ - <tt>, < </tt> Decreate \a stacks
+ - <tt>. > </tt> Increase \a stacks
+ - <tt>9 ( </tt> Decreate \a depth (Sierpinski Sponge)
+ - <tt>0 ) </tt> Increase \a depth (Sierpinski Sponge)
+ - <tt>up </tt> Increase "outer radius"
+ - <tt>down </tt> Decrease "outer radius"
+ - <tt>left </tt> Decrease "inner radius"
+ - <tt>right</tt> Increase "inner radius"
+ - <tt>PgUp </tt> Next shape-drawing function
+ - <tt>PgDn </tt> Prev shape-drawing function
+
+ \author Written by Nigel Stewart November 2003
+
+ \author Portions Copyright (C) 2004, the OpenGLUT project contributors. <br>
+ OpenGLUT branched from freeglut in February, 2004.
+
+ \image html openglut_shapes.png OpenGLUT Geometric Shapes Demonstration
+ \include demos/shapes/shapes.c
+*/
+
#include <GL/freeglut.h>
+#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
-#include <math.h>
+#ifdef _MSC_VER
+/* DUMP MEMORY LEAKS */
+#include <crtdbg.h>
+#endif
+
+/*
+ * This macro is only intended to be used on arrays, of course.
+ */
+#define NUMBEROF(x) ((sizeof(x))/(sizeof(x[0])))
+
+/*
+ * These global variables control which object is drawn,
+ * and how it is drawn. No object uses all of these
+ * variables.
+ */
+static int function_index;
static int slices = 16;
static int stacks = 16;
+static double irad = .25;
+static double orad = 1.0; /* doubles as size for objects other than Torus */
+static int depth = 4;
+static double offset[ 3 ] = { 0, 0, 0 };
+static GLboolean show_info = GL_TRUE;
+static float ar;
+static GLboolean persProject = GL_TRUE;
+static GLboolean animateXRot = GL_FALSE;
+
+/*
+ * These one-liners draw particular objects, fetching appropriate
+ * information from the above globals. They are just thin wrappers
+ * for the FreeGLUT objects.
+ */
+static void drawSolidTetrahedron(void) { glutSolidTetrahedron (); }
+static void drawWireTetrahedron(void) { glutWireTetrahedron (); }
+static void drawSolidCube(void) { glutSolidCube(orad); } /* orad doubles as size input */
+static void drawWireCube(void) { glutWireCube(orad); } /* orad doubles as size input */
+static void drawSolidOctahedron(void) { glutSolidOctahedron (); }
+static void drawWireOctahedron(void) { glutWireOctahedron (); }
+static void drawSolidDodecahedron(void) { glutSolidDodecahedron (); }
+static void drawWireDodecahedron(void) { glutWireDodecahedron (); }
+static void drawSolidRhombicDodecahedron(void) { glutSolidRhombicDodecahedron (); }
+static void drawWireRhombicDodecahedron(void) { glutWireRhombicDodecahedron (); }
+static void drawSolidIcosahedron(void) { glutSolidIcosahedron (); }
+static void drawWireIcosahedron(void) { glutWireIcosahedron (); }
+static void drawSolidSierpinskiSponge(void) { glutSolidSierpinskiSponge (depth, offset, orad);} /* orad doubles as size input */
+static void drawWireSierpinskiSponge(void) { glutWireSierpinskiSponge (depth, offset, orad); } /* orad doubles as size input */
+static void drawSolidTorus(void) { glutSolidTorus(irad,orad,slices,stacks); }
+static void drawWireTorus(void) { glutWireTorus (irad,orad,slices,stacks); }
+static void drawSolidSphere(void) { glutSolidSphere(orad,slices,stacks); } /* orad doubles as size input */
+static void drawWireSphere(void) { glutWireSphere(orad,slices,stacks); } /* orad doubles as size input */
+static void drawSolidCone(void) { glutSolidCone(orad,orad,slices,stacks); } /* orad doubles as size input */
+static void drawWireCone(void) { glutWireCone(orad,orad,slices,stacks); } /* orad doubles as size input */
+static void drawSolidCylinder(void) { glutSolidCylinder(orad,orad,slices,stacks); } /* orad doubles as size input */
+static void drawWireCylinder(void) { glutWireCylinder(orad,orad,slices,stacks); } /* orad doubles as size input */
+static void drawSolidTeapot(void)
+{
+ /* per Glut manpage, it should be noted that the teapot is rendered
+ * with clockwise winding for front facing polygons...
+ */
+ glFrontFace(GL_CW);
+ glutSolidTeapot(orad); /* orad doubles as size input */
+ glFrontFace(GL_CCW);
+}
+static void drawWireTeapot(void)
+{
+ /* per Glut manpage, it should be noted that the teapot is rendered
+ * with clockwise winding for front facing polygons...
+ */
+ glFrontFace(GL_CW);
+ glutWireTeapot(orad); /* orad doubles as size input */
+ glFrontFace(GL_CCW);
+}
+
+#define RADIUS 1.0f
+
+static void drawSolidCuboctahedron(void)
+{
+ glBegin( GL_TRIANGLES );
+ glNormal3d( 0.577350269189, 0.577350269189, 0.577350269189); glVertex3d( RADIUS, RADIUS, 0.0 ); glVertex3d( 0.0, RADIUS, RADIUS ); glVertex3d( RADIUS, 0.0, RADIUS );
+ glNormal3d( 0.577350269189, 0.577350269189,-0.577350269189); glVertex3d( RADIUS, RADIUS, 0.0 ); glVertex3d( RADIUS, 0.0,-RADIUS ); glVertex3d( 0.0, RADIUS,-RADIUS );
+ glNormal3d( 0.577350269189,-0.577350269189, 0.577350269189); glVertex3d( RADIUS,-RADIUS, 0.0 ); glVertex3d( RADIUS, 0.0, RADIUS ); glVertex3d( 0.0,-RADIUS, RADIUS );
+ glNormal3d( 0.577350269189,-0.577350269189,-0.577350269189); glVertex3d( RADIUS,-RADIUS, 0.0 ); glVertex3d( 0.0,-RADIUS,-RADIUS ); glVertex3d( RADIUS, 0.0,-RADIUS );
+ glNormal3d(-0.577350269189, 0.577350269189, 0.577350269189); glVertex3d(-RADIUS, RADIUS, 0.0 ); glVertex3d(-RADIUS, 0.0, RADIUS ); glVertex3d( 0.0, RADIUS, RADIUS );
+ glNormal3d(-0.577350269189, 0.577350269189,-0.577350269189); glVertex3d(-RADIUS, RADIUS, 0.0 ); glVertex3d( 0.0, RADIUS,-RADIUS ); glVertex3d(-RADIUS, 0.0,-RADIUS );
+ glNormal3d(-0.577350269189,-0.577350269189, 0.577350269189); glVertex3d(-RADIUS,-RADIUS, 0.0 ); glVertex3d( 0.0,-RADIUS, RADIUS ); glVertex3d(-RADIUS, 0.0, RADIUS );
+ glNormal3d(-0.577350269189,-0.577350269189,-0.577350269189); glVertex3d(-RADIUS,-RADIUS, 0.0 ); glVertex3d(-RADIUS, 0.0,-RADIUS ); glVertex3d( 0.0,-RADIUS,-RADIUS );
+ glEnd();
+
+ glBegin( GL_QUADS );
+ 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 );
+ 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 );
+ 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 );
+ 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 );
+ 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 );
+ 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 );
+ glEnd();
+}
+
+static void drawWireCuboctahedron(void)
+{
+ glBegin( GL_LINE_LOOP );
+ 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 );
+ glEnd();
+ glBegin( GL_LINE_LOOP );
+ 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 );
+ glEnd();
+ glBegin( GL_LINE_LOOP );
+ 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 );
+ glEnd();
+ glBegin( GL_LINE_LOOP );
+ 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 );
+ glEnd();
+ glBegin( GL_LINE_LOOP );
+ 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 );
+ glEnd();
+ glBegin( GL_LINE_LOOP );
+ 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 );
+ glEnd();
+}
+
+#undef RADIUS
+
+/*
+ * This structure defines an entry in our function-table.
+ */
+typedef struct
+{
+ const char * const name;
+ void (*solid) (void);
+ void (*wire) (void);
+} entry;
+
+#define ENTRY(e) {#e, drawSolid##e, drawWire##e}
+static const entry table [] =
+{
+ ENTRY (Tetrahedron),
+ ENTRY (Cube),
+ ENTRY (Octahedron),
+ ENTRY (Dodecahedron),
+ ENTRY (RhombicDodecahedron),
+ ENTRY (Icosahedron),
+ ENTRY (SierpinskiSponge),
+ ENTRY (Teapot),
+ ENTRY (Torus),
+ ENTRY (Sphere),
+ ENTRY (Cone),
+ ENTRY (Cylinder),
+ ENTRY (Cuboctahedron)
+};
+#undef ENTRY
+
+/*!
+ Does printf()-like work using freeglut
+ glutBitmapString(). Uses a fixed font. Prints
+ at the indicated row/column position.
+
+ Limitation: Cannot address pixels.
+ Limitation: Renders in screen coords, not model coords.
+*/
+static void shapesPrintf (int row, int col, const char *fmt, ...)
+{
+ static char buf[256];
+ int viewport[4];
+ void *font = GLUT_BITMAP_9_BY_15;
+ va_list args;
+
+ va_start(args, fmt);
+#if defined(WIN32) && !defined(__CYGWIN__)
+ (void) _vsnprintf (buf, sizeof(buf), fmt, args);
+#else
+ (void) vsnprintf (buf, sizeof(buf), fmt, args);
+#endif
+ va_end(args);
+
+ glGetIntegerv(GL_VIEWPORT,viewport);
+
+ glPushMatrix();
+ glLoadIdentity();
+
+ glMatrixMode(GL_PROJECTION);
+ glPushMatrix();
+ glLoadIdentity();
+
+ glOrtho(0,viewport[2],0,viewport[3],-1,1);
+
+ glRasterPos2i
+ (
+ glutBitmapWidth(font, ' ') * col,
+ - glutBitmapHeight(font) * row + viewport[3]
+ );
+ glutBitmapString (font, (unsigned char*)buf);
+
+ glPopMatrix();
+ glMatrixMode(GL_MODELVIEW);
+ glPopMatrix();
+}
+
+/* GLUT callback Handlers */
-static void
-reshape(int width, int height)
+static void
+resize(int width, int height)
{
- float ar;
-
- glViewport( 0, 0, width, height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- ar = (float) width / (float) height;
- glFrustum ( -ar, ar, -1.0, 1.0, 2.0, 100.0);
-
- glMatrixMode(GL_MODELVIEW) ;
- glLoadIdentity() ;
+ ar = (float) width / (float) height;
+
+ glViewport(0, 0, width, height);
}
-static void
-display(void)
+static void display(void)
{
- float t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
- float a = t*90.0;
-
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glPushMatrix();
- glTranslatef(-2.4,1.2,-6);
- glRotatef(60,1,0,0);
- glRotatef(a,0,0,1);
- glColor3f(1,0,0);
- glutSolidSphere(1,slices,stacks);
- glPopMatrix();
-
- glPushMatrix();
- glTranslatef(0,1.2,-6);
- glRotatef(60,1,0,0);
- glRotatef(a,0,0,1);
- glColor3f(1,0,0);
- glutSolidCone(1,1,slices,stacks);
- glPopMatrix();
-
- glPushMatrix();
- glTranslatef(2.4,1.2,-6);
- glRotatef(60,1,0,0);
- glRotatef(a,0,0,1);
- glColor3f(1,0,0);
- glutSolidTorus(0.2,0.8,slices,stacks);
- glPopMatrix();
-
- glPushMatrix();
- glTranslatef(-2.4,-1.2,-6);
- glRotatef(60,1,0,0);
- glRotatef(a,0,0,1);
- glColor3f(1,0,0);
- glutWireSphere(1,slices,stacks);
- glPopMatrix();
-
- glPushMatrix();
- glTranslatef(0,-1.2,-6);
- glRotatef(60,1,0,0);
- glRotatef(a,0,0,1);
- glColor3f(1,0,0);
- glutWireCone(1,1,slices,stacks);
- glPopMatrix();
-
- glPushMatrix();
- glTranslatef(2.4,-1.2,-6);
- glRotatef(60,1,0,0);
- glRotatef(a,0,0,1);
- glColor3f(1,0,0);
- glutWireTorus(0.2,0.8,slices,stacks);
- glPopMatrix();
-
- glutSwapBuffers();
+ const double t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+ const double a = t*90.0;
+ const double b = (animateXRot?t:1)*60.0;
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ if (persProject)
+ glFrustum(-ar, ar, -1.0, 1.0, 2.0, 100.0);
+ else
+ glOrtho(-ar*3, ar*3, -3.0, 3.0, 2.0, 100.0);
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ glEnable(GL_LIGHTING);
+
+ glColor3d(1,0,0);
+
+ glPushMatrix();
+ glTranslated(0,1.2,-6);
+ glRotated(b,1,0,0);
+ glRotated(a,0,0,1);
+ table [function_index].solid ();
+ glPopMatrix();
+
+ glPushMatrix();
+ glTranslated(0,-1.2,-6);
+ glRotated(b,1,0,0);
+ glRotated(a,0,0,1);
+ table [function_index].wire ();
+ glPopMatrix();
+
+ glDisable(GL_LIGHTING);
+ glColor3d(0.1,0.1,0.4);
+
+ if( show_info ) {
+ shapesPrintf (1, 1, "Shape PgUp PgDn: %s", table [function_index].name);
+ shapesPrintf (2, 1, "Slices +-: %d Stacks <>: %d", slices, stacks);
+ shapesPrintf (3, 1, "nSides +-: %d nRings <>: %d", slices, stacks);
+ shapesPrintf (4, 1, "Depth (): %d", depth);
+ shapesPrintf (5, 1, "Outer radius Up Down : %f", orad);
+ shapesPrintf (6, 1, "Inner radius Left Right: %f", irad);
+ } else {
+ printf ( "Shape %d slides %d stacks %d\n", function_index, slices, stacks ) ;
+ }
+
+ glutSwapBuffers();
}
-static void
+static void
key(unsigned char key, int x, int y)
{
- switch (key) {
- case 27 :
- case 'q':
- exit(0);
- break;
-
- case '+':
- slices++;
- stacks++;
- break;
-
- case '-':
- slices--;
- stacks--;
- break;
- }
-
- glutPostRedisplay();
+ switch (key)
+ {
+ case 27 :
+ case 'Q':
+ case 'q': glutLeaveMainLoop () ; break;
+
+ case 'I':
+ case 'i': show_info = ( show_info == GL_TRUE ) ? GL_FALSE : GL_TRUE; break;
+
+ case '=':
+ case '+': slices++; break;
+
+ case '-':
+ case '_': if( slices > -1 ) slices--; break;
+
+ case ',':
+ case '<': if( stacks > -1 ) stacks--; break;
+
+ case '.':
+ case '>': stacks++; break;
+
+ case '9':
+ case '(': if( depth > -1 ) depth--; break;
+
+ case '0':
+ case ')': ++depth; break;
+
+ case 'P':
+ case 'p': persProject=!persProject; break;
+
+ case 'R':
+ case 'r': animateXRot=!animateXRot; break;
+
+ default:
+ break;
+ }
+
+ glutPostRedisplay();
+}
+
+static void special (int key, int x, int y)
+{
+ switch (key)
+ {
+ case GLUT_KEY_PAGE_UP: ++function_index; break;
+ case GLUT_KEY_PAGE_DOWN: --function_index; break;
+ case GLUT_KEY_UP: orad *= 2; break;
+ case GLUT_KEY_DOWN: orad /= 2; break;
+
+ case GLUT_KEY_RIGHT: irad *= 2; break;
+ case GLUT_KEY_LEFT: irad /= 2; break;
+
+ default:
+ break;
+ }
+
+ if (0 > function_index)
+ function_index = NUMBEROF (table) - 1;
+
+ if (NUMBEROF (table) <= ( unsigned )function_index)
+ function_index = 0;
}
-void
-idle()
+
+static void
+idle(void)
{
- glutPostRedisplay();
+ glutPostRedisplay();
}
-GLfloat light_ambient[] = { 0.0, 0.0, 0.0, 1.0 };
-GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
-GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 };
-GLfloat light_position[] = { 2.0, 5.0, 5.0, 0.0 };
+const GLfloat light_ambient[] = { 0.0f, 0.0f, 0.0f, 1.0f };
+const GLfloat light_diffuse[] = { 1.0f, 1.0f, 1.0f, 1.0f };
+const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
+const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f };
+
+const GLfloat mat_ambient[] = { 0.7f, 0.7f, 0.7f, 1.0f };
+const GLfloat mat_diffuse[] = { 0.8f, 0.8f, 0.8f, 1.0f };
+const GLfloat mat_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
+const GLfloat high_shininess[] = { 100.0f };
-GLfloat mat_ambient[] = { 0.7, 0.7, 0.7, 1.0 };
-GLfloat mat_diffuse[] = { 0.8, 0.8, 0.8, 1.0 };
-GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
-GLfloat high_shininess[] = { 100.0 };
+/* Program entry point */
-int
+int
main(int argc, char *argv[])
{
- glutInit(&argc, argv);
- glutInitWindowSize(640,480);
- glutInitWindowPosition (40,40);
- glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+ glutInitWindowSize(640,480);
+ glutInitWindowPosition(40,40);
+ glutInit(&argc, argv);
+ glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_MULTISAMPLE);
- glutCreateWindow("FreeGLUT Shapes");
+ glutCreateWindow("FreeGLUT Shapes");
- glutReshapeFunc(reshape);
- glutDisplayFunc(display);
- glutKeyboardFunc(key);
- glutIdleFunc(idle);
+ glutReshapeFunc(resize);
+ glutDisplayFunc(display);
+ glutKeyboardFunc(key);
+ glutSpecialFunc(special);
+ glutIdleFunc(idle);
- glClearColor(1,1,1,1);
- glEnable(GL_CULL_FACE);
+ glutSetOption ( GLUT_ACTION_ON_WINDOW_CLOSE, GLUT_ACTION_CONTINUE_EXECUTION ) ;
+
+ glClearColor(1,1,1,1);
+ glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHT0);
glEnable(GL_NORMALIZE);
glEnable(GL_COLOR_MATERIAL);
- glEnable(GL_LIGHTING);
glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);
- glutMainLoop();
+ glutMainLoop();
+
+#ifdef _MSC_VER
+ /* DUMP MEMORY LEAK INFORMATION */
+ _CrtDumpMemoryLeaks () ;
+#endif
- return EXIT_SUCCESS;
+ return EXIT_SUCCESS;
}
projects / freeglut / blobdiff