[csdOpenGL.NET-CVS] csdOpenGL/samples gears.cs,1.1,1.2

[Tim R. <ti...@us...>]

Update of /cvsroot/csdopenglnet/csdOpenGL/samples
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv14180

Modified Files:
	gears.cs 
Log Message:
gears example - the beginning
not what I want, but not so bad :)


Index: gears.cs
===================================================================
RCS file: /cvsroot/csdopenglnet/csdOpenGL/samples/gears.cs,v
retrieving revision 1.1
retrieving revision 1.2
diff -C2 -d -r1.1 -r1.2
*** gears.cs	17 Jul 2004 18:37:49 -0000	1.1
--- gears.cs	17 Jul 2004 19:34:35 -0000	1.2
***************
*** 4,7 ****
--- 4,15 ----
  public class Lesson01GLUT : csdGL {
  
+   protected float angle = 0.0f;
+   protected uint gear1;
+   protected uint gear2;
+   protected uint gear3;
+   protected const double view_rotx = 20.0;
+   protected const double view_roty = 30.0;
+   protected const double view_rotz = 0.0;
+   
    public Lesson01GLUT() {
      glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
***************
*** 9,13 ****
      glutCreateWindow("Gears");
      
!     initGL(); // initialize the OpenGL context
      
      glutDisplayFunc( new cb0_glutDisplayFunc( draw ) ); 
--- 17,21 ----
      glutCreateWindow("Gears");
      
!     initGL();
      
      glutDisplayFunc( new cb0_glutDisplayFunc( draw ) ); 
***************
*** 27,34 ****
--- 35,48 ----
    
    protected void redraw() {
+     angle += 2.0f;
      glutPostRedisplay();
    }
   
    protected void initGL() {
+     float[] pos = { 5.0f, 5.0f, 10.0f, 0.0f };
+     float[] red = { 0.8f, 0.1f, 0.0f, 1.0f };
+     float[] green = { 0.0f, 0.8f, 0.2f, 1.0f };
+     float[] blue = { 0.2f, 0.2f, 1.0f, 1.0f };
+     /*
      glShadeModel( GL_SMOOTH );
      glClearColor( 0.0f, 0.0f, 0.0f, 0.0f );
***************
*** 37,40 ****
--- 51,83 ----
      glDepthFunc( GL_LEQUAL );
      glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
+     */
+     glLightfv( GL_LIGHT0, GL_POSITION, pos );
+     glEnable( GL_CULL_FACE );
+     glEnable( GL_LIGHTING );
+     glEnable( GL_LIGHT0 );
+     glEnable( GL_DEPTH_TEST );
+ 
+     /* gears */    
+     gear1 = glGenLists( 1 );
+     glNewList( gear1, GL_COMPILE );
+     glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red );
+     gear( 1.0, 4.0, 1.0, 20, 0.7 );
+     glEndList();
+     
+     gear2 = glGenLists( 1 );
+     glNewList( gear2, GL_COMPILE );
+     glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green );
+     gear( 0.5, 2.0, 2.0, 10, 0.7 );
+     glEndList();
+     
+     gear3 = glGenLists( 1 );
+     glNewList( gear3, GL_COMPILE );
+     glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue );
+     gear( 1.3, 2.0, 0.5, 10, 0.7 );
+     glEndList();
+     
+     glEnable( GL_NORMALIZE );
+     
+ //    glEnd();
    }
    
***************
*** 47,62 ****
      glLoadIdentity ();
      
!     glFrustum (-1.0, 1.0, -h, h, 5.0, 5.0);
      glMatrixMode (GL_MODELVIEW);
      glLoadIdentity ();
!   }  
      
    protected void draw() {
      glClear ( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
!         glLoadIdentity();
      
      glutSwapBuffers();
    }
    
    protected void keyboard( byte key, int x, int y ) {
      if (key==27) System.Environment.Exit(0);
--- 90,236 ----
      glLoadIdentity ();
      
!     glFrustum (-1.0, 1.0, -h, h, 5.0, 60.0 );
      glMatrixMode (GL_MODELVIEW);
      glLoadIdentity ();
!     glTranslatef( 0.0f, 0.0f, -40.0f );
!   }
      
    protected void draw() {
      glClear ( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
!     
!     glPushMatrix();
!     glRotated( view_rotx, 1.0, 0.0, 0.0 );
!     glRotated( view_roty, 0.0, 1.0, 0.0 );
!     glRotated( view_rotz, 0.0, 0.0, 1.0 );
!     
!     glPushMatrix();
!     glTranslated( -3.0, -2.0, 0.0 );
!     glRotated( angle, 0.0, 0.0, 1.0 );
!     glCallList( gear1 );
!     glPopMatrix();
!     
!     glPushMatrix();
!     glTranslated( 3.1, -2.0, 0.0 );
!     glRotated( -2.0 * angle - 9.0, 0.0, 0.0, 1.0 );
!     glCallList( gear2 );
!     glPopMatrix();
!     
!     glPushMatrix();
!     glTranslated( -3.1, 4.2, 0.0 );
!     glRotated( -2.0 * angle - 25.0, 0.0, 0.0, 1.0 );
!     glCallList( gear3 );
!     glPopMatrix();
      
      glutSwapBuffers();
    }
    
+   protected void gear( double inner_radius, double outer_radius, double width, int teeth, double tooth_depth ) {
+     double r0 = inner_radius;
+     double r1 = outer_radius - tooth_depth / 2.0;
+     double r2 = outer_radius + tooth_depth / 2.0;
+     double da = 2.0f * System.Math.PI / teeth / 4.0;
+     int i;
+     double ang, u, v, len;   
+     
+     glShadeModel( GL_FLAT );
+     
+     /* front face */
+     glBegin( GL_QUAD_STRIP );
+     for ( i=0; i<=teeth; i++ ) {
+       ang = i * 2.0f * System.Math.PI;
+       glVertex3d( r0 * System.Math.Cos( ang ), r0 * System.Math.Sin( ang ), width * 0.5 );
+       glVertex3d( r1 * System.Math.Cos( ang ), r1 * System.Math.Sin( ang ), width * 0.5 );
+       if ( i<teeth ) {
+         glVertex3d( r0 * System.Math.Cos( ang ), r0 * System.Math.Sin( ang ), width * 0.5 );
+         glVertex3d( r1 * System.Math.Cos( ang + 3 * da ), r1 * System.Math.Sin( ang + 3 * da ), width * 0.5 );
+       }
+     }
+     glEnd();
+     
+     /* front side of teeth */
+     glBegin( GL_QUADS );
+     da = 2.0 * System.Math.PI / teeth / 4.0;
+     for ( i=0; i<teeth; i++ ) {
+       ang = i * 2.0 * System.Math.PI / teeth;
+       glVertex3d( r1 * System.Math.Cos( ang ), r1 * System.Math.Sin( ang ), width * 0.5 );
+       glVertex3d( r2 * System.Math.Cos( ang + da ), r2 * System.Math.Sin( ang + da ), width * 0.5 );
+       glVertex3d( r2 * System.Math.Cos( ang + 2 * da ), r2 * System.Math.Sin( ang + 2 * da ), width * 0.5 );
+       glVertex3d( r1 * System.Math.Cos( ang + 3 * da ), r1 * System.Math.Sin( ang + 3 * da ), width * 0.5 );
+     }
+     glEnd();
+     
+     glNormal3d( 0.0, 0.0, -1.0 );
+ 
+     /* draw back face */
+     glBegin( GL_QUAD_STRIP );
+     for ( i=0; i<teeth; i++ ) {
+       ang = i * 2.0 * System.Math.PI / teeth;
+       glVertex3d( r1 * System.Math.Cos( ang ), r1 * System.Math.Sin( ang ), -width * 0.5 );
+       glVertex3d( r0 * System.Math.Cos( ang ), r0 * System.Math.Sin( ang ), -width * 0.5 );
+       if (i<teeth) {
+         glVertex3d( r1 * System.Math.Cos( ang + 3 * da ), r1 * System.Math.Sin( ang + 3 * da ), -width * 0.5 );
+         glVertex3d( r0 * System.Math.Cos( ang ), r0 * System.Math.Sin( ang ), -width * 0.5 );
+       }
+     }
+     glEnd();
+     
+     /* draw back side of teeth */
+     glBegin( GL_QUADS );
+     da = 2.0 * System.Math.PI / teeth / 4.0;
+     for ( i=0; i<teeth; i++ ) {
+       ang = i * 2.0 * System.Math.PI / teeth;
+       glVertex3d( r1 * System.Math.Cos( ang + 3 * da ), r1 * System.Math.Sin( ang + 3 * da ), -width * 0.5 );
+       glVertex3d( r2 * System.Math.Cos( ang + 2 * da ), r2 * System.Math.Sin( ang + 2 * da ), -width * 0.5 );
+       glVertex3d( r2 * System.Math.Cos( ang + da ), r2 * System.Math.Sin( ang + da ), -width * 0.5 );
+       glVertex3d( r1 * System.Math.Cos( ang ), r1 * System.Math.Sin( ang ), -width * 0.5 );
+     }
+     glEnd();
+     
+     /* draw outward faces of teeth */
+     glBegin( GL_QUAD_STRIP );
+     for ( i=0; i<teeth; i++ ) {
+       ang = i * 2.0 * System.Math.PI / teeth;
+       glVertex3d( r1 * System.Math.Cos( ang ), r1 * System.Math.Sin( ang ), width * 0.5 );
+       glVertex3d( r1 * System.Math.Cos( ang ), r1 * System.Math.Sin( ang ), -width * 0.5 );
+       
+       u = r2 * System.Math.Cos( ang + da ) - r1 * System.Math.Cos( ang );
+       v = r2 * System.Math.Sin( ang + da ) - r1 * System.Math.Sin( ang );
+       len = System.Math.Sqrt( u * u + v * v );
+       u /= len;
+       v /= len;
+       glNormal3d( v, -u, 0.0 );
+       
+       glVertex3d( r2 * System.Math.Cos( ang + da ), r2 * System.Math.Sin( ang + da ), width * 0.5 );
+       glVertex3d( r2 * System.Math.Cos( ang + da ), r2 * System.Math.Sin( ang + da ), -width * 0.5 );
+       glVertex3d( System.Math.Cos( ang ), System.Math.Sin( ang ), 0.0 );
+       glVertex3d( r2 * System.Math.Cos( ang + 2 * da ), r2 * System.Math.Sin( ang + 2 * da ), width * 0.5 );
+       glVertex3d( r2 * System.Math.Cos( ang + 2 * da ), r2 * System.Math.Sin( ang + 2 * da ), -width * 0.5 );
+       
+       u = r1 * System.Math.Cos( ang + 3 * da ) - r2 * System.Math.Cos( ang + 2 * da );
+       v = r1 * System.Math.Sin( ang + 3 * da ) - r2 * System.Math.Sin( ang + 2 * da );
+       glNormal3d( v, -u, 0.0 );
+       
+       glVertex3d( r1 * System.Math.Cos( ang + 3 * da ), r1 + System.Math.Sin( ang + 3 * da ), width * 0.5 );
+       glVertex3d( r1 * System.Math.Cos( ang + 3 * da ), r1 + System.Math.Sin( ang + 3 * da ), -width * 0.5 );
+       
+       glNormal3d( System.Math.Cos( ang ), System.Math.Sin( ang ), 0.0 );
+     }
+     glVertex3d( r1 * System.Math.Cos( 0 ), r1 * System.Math.Sin( 0 ), width * 0.5 );
+     glVertex3d( r1 * System.Math.Cos( 0 ), r1 * System.Math.Sin( 0 ), -width * 0.5 );
+     glEnd(); 
+     
+     glShadeModel( GL_SMOOTH );
+     
+     /* draw inside radius cylinder */
+     glBegin( GL_QUAD_STRIP );
+     for ( i=0; i<=teeth; i++ ) {
+       ang = i * 2.0 * System.Math.PI / teeth;
+       glNormal3d( -System.Math.Cos( ang ), -System.Math.Sin( ang ), 0.0 );
+       glVertex3d( r0 * System.Math.Cos( ang ), r0 * System.Math.Sin( ang ), -width * 0.5 );
+       glVertex3d( r0 * System.Math.Cos( ang ), r0 * System.Math.Sin( ang ), width * 0.5 );
+     }
+     glEnd();
+   }
+   
    protected void keyboard( byte key, int x, int y ) {
      if (key==27) System.Environment.Exit(0);