topical media & game development
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Web3D/VR

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3

interpolators and scripts

contents

nodes for assignment


      Sensors
  	(TouchSensor, PlaneSensor, CylinderSensor, SphereSensor),
  		                    DEF/USE,
  						PROTO

timers, interpolators, sensors and scripts

dissection

dissection analog case


  
  Shape  {    ## # The shape
  	geometry Sphere { radius 2 }
  	## # we will modify the Material (DEF)
  	appearance Appearance {
  		material DEF MATERIAL Material {
  			diffuseColor 1 0 0
  			}
  		}
    } # 
  
    DEF TIME TimeSensor { loop TRUE cycleInterval 5 } #
    ## # We use a simple ColorInterpolator (analog)
    DEF COLORS ColorInterpolator {
  	key [ 0 0.5 1 ]
  	keyValue [ 1 0 0,  0 0 1, 1 0 0 ]
  	} #
  
  ROUTE TIME.fraction_changed TO COLORS.set_fraction
  ROUTE COLORS.value_changed TO MATERIAL.diffuseColor

dissection discrete case


  
  Shape  {
  	geometry Sphere { radius 2 }
  	appearance Appearance {
  		material DEF MATERIAL Material {
  			diffuseColor 1 0 0
  			}
  		}
  }
  DEF TIME TimeSensor { loop TRUE cycleInterval 5 } #
  
  DEF COLORS Script {   
  	eventIn SFFloat set_fraction    
  	eventOut SFColor value_changed  
  	url "javascript:
  	function set_fraction(value) {  
  		if (value < 0.5) value_changed = '0 1 1';
  		else value_changed = '1 0 0';
  		}
  		"
  	}#
  
  
  ROUTE TIME.fraction_changed TO COLORS.set_fraction
  ROUTE COLORS.value_changed TO MATERIAL.diffuseColor

TimeSensor


  TimeSensor { 
      exposedField SFTime   cycleInterval 1       # (0,)
      exposedField SFBool   enabled       TRUE
      exposedField SFBool   loop          FALSE
      exposedField SFTime   startTime     0       # (-,)
      exposedField SFTime   stopTime      0       # (-,)
      eventOut     SFTime   cycleTime
      eventOut     SFFloat  fraction_changed
      eventOut     SFBool   isActive
      eventOut     SFTime   time
    }

prototype

dissection prototype


  
  PROTO Bulb [
  exposedField SFVec3f translation 0 0 0
  exposedField SFVec3f scale 1 1 1
  ]{
  Transform {
  translation IS translation
  scale IS scale
  children [
  Shape  {
  	geometry Sphere { radius 2 }
  	appearance Appearance {
  		material DEF MATERIAL Material { #
  			diffuseColor 1 0 0
  			}
  		}
  } #
  
  DEF TOUCH TouchSensor { }
  DEF TIME TimeSensor { enabled FALSE loop TRUE } #
  
  DEF SCRIPT Script {   
  	eventIn SFFloat set_fraction    
  	eventOut SFColor value_changed  
  	eventIn  SFTime touched
  	eventOut SFBool enabled
  	field SFBool on FALSE
  	url "javascript:
  	function touched(time) {
  	if (!on) {
  		on = 'TRUE';
  		enabled = 'TRUE';
  	} else {
  		on = 'FALSE';
  		enabled = 'FALSE';
  		}
  	}
  	function set_fraction(value) {  
  		if (value < 0.5) value_changed = '1 0 0';
  		else value_changed = '0 1 1';
  		}
  		"
  	}#
  
  ROUTE TOUCH.touchTime TO SCRIPT.touched
  ROUTE SCRIPT.enabled TO TIME.enabled
  ROUTE TIME.fraction_changed TO SCRIPT.set_fraction
  ROUTE SCRIPT.value_changed TO MATERIAL.diffuseColor
  ] }
  }
  
  Bulb { translation -8 0 0 scale 0.5 0.5 0.5 }
  Bulb { translation -5 0 0 }
  Bulb { scale 1.5 1.5 1.5 }
  Bulb { translation 5 0 0 }
  Bulb { translation 8 0 0 scale 0.5 0.5 0.5 }

script



  DEF SCRIPT Script {   
  	eventIn SFFloat set_fraction    
  	eventOut SFColor value_changed  
  	eventIn  SFTime touched
  	eventOut SFBool enabled
  	field SFBool on FALSE
  

  	url "javascript:
  	function touched(time) {
  	if (!on) {
  		on = 'TRUE';
  		enabled = 'TRUE';
  	} else {
  		on = 'FALSE';
  		enabled = 'FALSE';
  		}
  	}
  	function set_fraction(value) {  
  		if (value < 0.5) value_changed = '1 0 0';
  		else value_changed = '0 1 1';
  		}
  		"
  	}
  

  ROUTE SCRIPT.enabled TO TIME.enabled
  ROUTE TIME.fraction_changed TO SCRIPT.set_fraction
  ROUTE SCRIPT.value_changed TO MATERIAL.diffuseColor

routing



  DEF TOUCH TouchSensor { }
  DEF TIME TimeSensor { enabled FALSE loop TRUE } 
  DEF SCRIPT Script {     
  ...
  }
  ROUTE TOUCH.touchTime TO SCRIPT.touched
  ROUTE SCRIPT.enabled TO TIME.enabled
  ROUTE TIME.fraction_changed TO SCRIPT.set_fraction
  ROUTE SCRIPT.value_changed TO MATERIAL.diffuseColor

instances



  Bulb { translation -8 0 0 scale 0.5 0.5 0.5 }
  Bulb { translation -5 0 0 }
  Bulb { scale 1.5 1.5 1.5 }
  Bulb { translation 5 0 0 }
  Bulb { translation 8 0 0 scale 0.5 0.5 0.5 }

TouchSensor


  TouchSensor { 
      exposedField SFBool  enabled TRUE
      eventOut     SFVec3f hitNormal_changed
      eventOut     SFVec3f hitPoint_changed
      eventOut     SFVec2f hitTexCoord_changed
      eventOut     SFBool  isActive
      eventOut     SFBool  isOver
      eventOut     SFTime  touchTime
    }

Script


  Script { 
      exposedField MFString url           [] 
      field        SFBool   directOutput  FALSE
      field        SFBool   mustEvaluate  FALSE
      # And any number of:
      eventIn      eventType eventName
      field        fieldType fieldName initialValue
      eventOut     eventType eventName
    }

examples


homework: annotated reference manual

Web3D/VRML

Web3D/VR

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 04/09/2009

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