Web3D/VRML
[] readme course preface 1 2 3 4 5 6 7 reference examples resources

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x-nurb-ip.vr (wrl ) [ flux / bitmanagement / cortona / octaga ]

nurb interpolation

externnproto


  
  EXTERNPROTO NurbsPositionInterpolator [
    eventIn      SFFloat  set_fraction
    eventIn      MFFloat  set_knot
    eventIn      MFFloat  set_order
    eventIn      MFFloat  set_keyValue
    exposedField SFBool   fractionAbsolute 
    exposedField MFFloat  keyWeight        
    field MFFloat  knot                                             
    field SFInt32  order                                          
    field MFVec3f  keyValue                                 
    eventOut     SFVec3f  value_changed 
  ]
  [
          "urn:inet:blaxxun.com:node:NurbsPositionInterpolator",
          "nurbs.wrl#NurbsPositionInterpolator"  # for local testing
          "http://www.blaxxun.com/vrml/protos/nurbs.wrl#NurbsPositionInterpolator"
  ]

extern proto curve


  
  EXTERNPROTO NurbsCurve [
    field             MFFloat   knot             
    field             SFInt32   order                
  
    exposedField      MFVec3f   controlPoint     
    exposedField      MFFloat   weight          
    exposedField      SFInt32  tessellation      
  ] 
  [
          "urn:inet:blaxxun.com:node:NurbsCurve",
          "nurbs.wrl#NurbsCurve"  # for local testing
          "http://www.blaxxun.com/vrml/protos/nurbs.wrl#NurbsCurve"
  ]

transform root


  
  Transform {
  children [
  Shape {
                  appearance Appearance {
                          material Material {
                                  diffuseColor 0 1 0
                              ambientIntensity 1
                                  emissiveColor 1 0 0
                          }
                  }
                  geometry NurbsCurve {
                          knot [0, 0, 0, .2, .4, .6, .8, 1, 1] 
                          tessellation 50
                          controlPoint [0 0 0, 1 1 0, 0 2 0, 2 3 0, -1 4 0, 5 5 0]
                  }
  }

interpolator


  
  DEF NurbsInt NurbsPositionInterpolator {
  knot[0, 0, 0, .2, .4, .6, .8, 1, 1]
  keyValue[0 0 0, 1 1 0, 0 2 0, 2 3 0, -1 4 0, 5 5 0]
  }
  
  DEF sphere Transform {
  children [
  Shape {
        appearance Appearance {
          material Material {
            diffuseColor 0 1 0
                    emissiveColor 1 0 0
          }
        }
        geometry Sphere {radius .1}
  }
  ]
  }

timer and routing


  
  DEF spherets TimeSensor { loop TRUE cycleInterval 10 }
  
  ]
  }
  
  ROUTE spherets.fraction_changed TO NurbsInt.set_fraction
  ROUTE NurbsInt.value_changed TO sphere.set_translation
[] readme course preface 1 2 3 4 5 6 7 reference examples resources
eliens@cs.vu.nl

draft version 0.3 (17/9/2001)