Replacing the original \"freeglut\" \"shapes\" demo with the much snazzier OpenGLUT \"shapes\" demo. Many thanks to the OpenGLUT community for writing it. The copyright notice stays in the program.

git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@598 7f0cb862-5218-0410-a997-914c9d46530a

freeglut/freeglut/progs/demos/shapes/shapes.c

@@ -1,23 +1,204 @@
-/*
+/*! \file    shapes.c
- * FreeGLUT Shapes Demo
+    \ingroup demos
- *
+
- * Written by Nigel Stewart November 2003
+    This program is a test harness for the various shapes
- *
+    in OpenGLUT.  It may also be useful to see which
- * This program is test harness for the sphere, cone 
+    parameters control what behavior in the OpenGLUT
- * and torus shapes in FreeGLUT.
+    objects.
- *
+ 
- * Spinning wireframe and smooth shaded shapes are
+    Spinning wireframe and solid-shaded shapes are
- * displayed until the ESC or q key is pressed.  The
+    displayed.  Some parameters can be adjusted.
- * number of geometry stacks and slices can be adjusted
+ 
- * using the + and - keys.
+   Keys:
- */
+      -    <tt>Esc &nbsp;</tt> Quit
+      -    <tt>q Q &nbsp;</tt> Quit
+      -    <tt>= + &nbsp;</tt> Increase \a slices
+      -    <tt>- _ &nbsp;</tt> Decreate \a slices
+      -    <tt>, < &nbsp;</tt> Decreate \a stacks
+      -    <tt>. > &nbsp;</tt> Increase \a stacks
+      -    <tt>9 ( &nbsp;</tt> Decreate \a depth  (Sierpinski Sponge)
+      -    <tt>0 ) &nbsp;</tt> Increase \a depth  (Sierpinski Sponge)
+      -    <tt>up&nbsp; &nbsp;</tt> Increase "outer radius"
+      -    <tt>down&nbsp;</tt> Decrease "outer radius"
+      -    <tt>left&nbsp;</tt> Decrease "inner radius"
+      -    <tt>right</tt> Increase "inner radius"
+      -    <tt>PgUp&nbsp;</tt> Next shape-drawing function
+      -    <tt>PgDn&nbsp;</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>
 
+#ifdef WIN32
+#include <crtdbg.h>  // DUMP MEMORY LEAKS
+#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;
+static int depth = 4;
+static double offset[ 3 ] = { 0, 0, 0 };
+
+
+/*
+ * These one-liners draw particular objects, fetching appropriate
+ * information from the above globals.  They are just thin wrappers
+ * for the OpenGLUT objects.
+ */
+static void drawSolidTetrahedron(void)         { glutSolidTetrahedron ();                      }
+static void drawWireTetrahedron(void)          { glutWireTetrahedron ();                       }
+static void drawSolidCube(void)                { glutSolidCube(1);                             }
+static void drawWireCube(void)                 { glutWireCube(1);                              }
+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, 1); }
+static void drawWireSierpinskiSponge(void)     { glutWireSierpinskiSponge (depth, offset, 1);  }
+static void drawSolidTeapot(void)              { glutSolidTeapot(1);                           }
+static void drawWireTeapot(void)               { glutWireTeapot(1);                            }
+static void drawSolidTorus(void)               { glutSolidTorus(irad,orad,slices,stacks);      }
+static void drawWireTorus(void)                { glutWireTorus (irad,orad,slices,stacks);      }
+static void drawSolidSphere(void)              { glutSolidSphere(1,slices,stacks);             }
+static void drawWireSphere(void)               { glutWireSphere(1,slices,stacks);              }
+static void drawSolidCone(void)                { glutSolidCone(1,1,slices,stacks);             }
+static void drawWireCone(void)                 { glutWireCone(1,1,slices,stacks);              }
+static void drawSolidCylinder(void)            { glutSolidCylinder(1,1,slices,stacks);         }
+static void drawWireCylinder(void)             { glutWireCylinder(1,1,slices,stacks);          }
+static void drawSolidCuboctahedron(void)
+{
+#define RADIUS    1.0f
+  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();
+#undef RADIUS
+}
+static void drawWireCuboctahedron(void)
+{
+}
+
+/*
+ * 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/OpenGLUT
+    glutBitmapString().  Uses a fixed font.  Prints
+    at the indicated row/column position.
+
+    Limitation: Cannot address pixels.
+    Limitation: Renders in screen coords, not model coords.
+
+    \note Uses a fixed, 256-byte array for holding strings.
+          The best way around this would be to use vasprintf(),
+          but that is not available on WIN32, I believe.
+          Another alternative would be to write our own formatter
+          from scratch and emit the characters one at a time to
+          the GLUT bitmap single-character drawing routine.
+          We could also use vsnprintf(), but I'm not sure if
+          that is standard...
+*/
+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);
+    (void) vsprintf (buf, fmt, args);
+    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+2) + viewport[3]
+        );
+        glutBitmapString (font, buf);
+
+    glPopMatrix();
+    glMatrixMode(GL_MODELVIEW);
+    glPopMatrix();
+}
 
 /* GLUT callback Handlers */
 
@@ -27,6 +208,7 @@ resize(int width, int height)
     const float ar = (float) width / (float) height;
 
     glViewport(0, 0, width, height);
+
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
     glFrustum(-ar, ar, -1.0, 1.0, 2.0, 100.0);
@@ -35,57 +217,43 @@ resize(int width, int height)
     glLoadIdentity() ;
 }
 
-static void 
+static void display(void)
-display(void)
 {
     const double t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
     const double a = t*90.0;
 
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-    glColor3d(1,0,0);
 
-    glPushMatrix();
+    glEnable(GL_LIGHTING);
-        glTranslated(-2.4,1.2,-6);
+
-        glRotated(60,1,0,0);
+    printf ( "Shape %d slides %d stacks %d\n", function_index, slices, stacks ) ;
-        glRotated(a,0,0,1);
+
-        glutSolidSphere(1,slices,stacks);
+    glColor3d(1,0,0);
-    glPopMatrix();
 
     glPushMatrix();
         glTranslated(0,1.2,-6);
         glRotated(60,1,0,0);
         glRotated(a,0,0,1);
-        glutSolidCone(1,1,slices,stacks);
+        table [function_index].solid ();
-    glPopMatrix();
-
-    glPushMatrix();
-        glTranslated(2.4,1.2,-6);
-        glRotated(60,1,0,0);
-        glRotated(a,0,0,1);
-        glutSolidTorus(0.2,0.8,slices,stacks);
-    glPopMatrix();
-
-    glPushMatrix();
-        glTranslated(-2.4,-1.2,-6);
-        glRotated(60,1,0,0);
-        glRotated(a,0,0,1);
-        glutWireSphere(1,slices,stacks);
     glPopMatrix();
 
     glPushMatrix();
         glTranslated(0,-1.2,-6);
         glRotated(60,1,0,0);
         glRotated(a,0,0,1);
-        glutWireCone(1,1,slices,stacks);
+        table [function_index].wire ();
     glPopMatrix();
 
-    glPushMatrix();
+    glDisable(GL_LIGHTING);
-        glTranslated(2.4,-1.2,-6);
+    glColor3d(0.1,0.1,0.4);
-        glRotated(60,1,0,0);
-        glRotated(a,0,0,1);
-        glutWireTorus(0.2,0.8,slices,stacks);
-    glPopMatrix();
 
+/*    shapesPrintf (1, 3, "Shape PgUp PgDn: %s", table [function_index].name);
+    shapesPrintf (2, 3, " Slices +-: %d   Stacks <>: %d", slices, stacks);
+    shapesPrintf (3, 3, " nSides +-: %d   nRings <>: %d", slices, stacks);
+    shapesPrintf (4, 3, " Depth  (): %d", depth);
+    shapesPrintf (5, 3, " Outer radius  Up  Down : %f", orad);
+    shapesPrintf (6, 3, " Inner radius Left Right: %f", irad);
+*/
     glutSwapBuffers();
 }
 
@@ -95,36 +263,59 @@ key(unsigned char key, int x, int y)
 {
     switch (key)
     {
-        case 'n': glDisable ( GL_CULL_FACE ) ;
+    case 27 :
-                  break ;
+    case 'Q':
-        case 'f': glEnable ( GL_CULL_FACE ) ;
+    case 'q': glutLeaveMainLoop () ;      break;
-                  glCullFace ( GL_FRONT ) ;
-                  break ;
-        case 'b': glEnable ( GL_CULL_FACE ) ;
-                  glCullFace ( GL_BACK ) ;
-                  break ;
-        case 27 : 
-        case 'q':
-            exit(0);
-            break;
 
-        case '+':
+    case '=':
-            slices++;
+    case '+': slices++;                   break;
-            stacks++;
-            break;
 
-        case '-':
+    case '-':
-            if (slices>3 && stacks>3)
+    case '_': if( slices > -1 ) slices--; break;
-            {
+
-                slices--;
+    case ',':
-                stacks--;
+    case '<': if( stacks > -1 ) stacks--; break;
-            }
+
-            break;
+    case '.':
+    case '>': stacks++;                   break;
+
+    case '9': 
+    case '(': if( depth > -1 ) depth--;   break;
+
+    case '0': 
+    case ')': ++depth;                    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;
+}
+
+
 static void
 idle(void)
 {
@@ -146,28 +337,31 @@ const GLfloat high_shininess[] = { 100.0f };
 int
 main(int argc, char *argv[])
 {
-    glutInit(&argc, argv);
     glutInitWindowSize(640,480);
-    glutInitWindowPosition (40,40);
+    glutInitWindowPosition(40,40);
+    glutInit(&argc, argv);
     glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
 
-    glutCreateWindow("FreeGLUT Shapes");
+    glutCreateWindow("OpenGLUT Shapes");
 
     glutReshapeFunc(resize);
     glutDisplayFunc(display);
     glutKeyboardFunc(key);
+    glutSpecialFunc(special);
     glutIdleFunc(idle);
 
+    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);
+    glDepthFunc(GL_LESS);
 
     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);
@@ -181,6 +375,9 @@ main(int argc, char *argv[])
 
     glutMainLoop();
 
+#ifdef WIN32
+    _CrtDumpMemoryLeaks () ;  // DUMP MEMORY LEAK INFORMATION
+#endif
+
     return EXIT_SUCCESS;
 }
-