#VRML V2.0 utf8
##<load file=web3d-navigate>


##@ proto


PROTO asphere [
   field SFInt32 nlatitude 16
   field SFInt32 nlongitude 16
   field SFFloat creaseAngle 3.14
]

##@ body

{
   DEF IFS IndexedFaceSet {
      coord DEF C Coordinate { }
      texCoord DEF TC TextureCoordinate { }
      creaseAngle IS creaseAngle
   }

##@ script
   
   DEF S Script {
      field SFInt32 nlat IS nlatitude
      field SFInt32 nl IS nlongitude
      ##eventOut MFVec3f c
      eventOut MFVec3f c
      eventOut MFVec2f tc
      eventOut MFInt32 ci
      url [
         "javascript:

         function initialize() {
            var r, phi, x, y, z;
            var i, j, idx;
//@ coordinates
            // Compute coordinates, texture coordinates:
            for (i = 0; i < nlat; i++) {
               y = 2 * ( i / (nlat-1) ) - 1;
               r = Math.sqrt( 1 - y*y );
               for (j = 0; j < nl; j++) {
                  phi = 2 * Math.PI * j / nl;
                  x = -Math.sin(phi)*r;
                  z = -Math.cos(phi)*r;
                  c[i*nl+j] = new SFVec3f(x,y,z);
                  tc[i*nl+j] = new SFVec2f( j/nl, i/(nlat-1) );
               }
            }
##@ indices
            // And compute indices:
	    dfac = 3;
            for (i = 0; i < (nlat-1)/dfac; i++) {
               for (j = 0; j < nl; j++) {
                  idx = 5*(i*nl+j);
                  ci[idx+0] = dfac*i*nl+(j)%nl;
                  ci[idx+1] = dfac*i*nl+(j+1)%nl;
                  ci[idx+2] = (dfac*i+1)*nl+(j+1)%nl;
                  ci[idx+3] = (dfac*i+1)*nl+(j)%nl;
                  ci[idx+4] = -1;  // end-of-polygon
               }
            }
         }"
      ]
   }

##@ route(s)
   ROUTE S.c TO C.set_point
   ROUTE S.tc TO TC.set_point
   ROUTE S.ci TO IFS.set_coordIndex
}
##@ world

 Background { skyColor [0.9 .1 .1] }
 NavigationInfo { type ["EXAMINE", "ANY"] }
  
 Viewpoint { 
     position 0 0 10
     orientation 0 0 1 0
  }

##@ object

Transform {
     translation 0 0 0
     scale 2 2 2
     children [
        Shape {
           appearance DEF A Appearance {
              material Material {}
              ##texture ImageTexture { url ["local/images/check.gif"] }
              texture ImageTexture { url ["logo.jpg"] }
           }
           ##geometry asphere { nlatitude 32 nlongitude 20 }
           geometry asphere { nlatitude 100 nlongitude 100 }
        }
     ]
  }
  


##</>