Using action sensors
There are four main action sensor types:
- TouchSensor senses touch
- SphereSensor senses drags
- CylinderSensor senses drags
- PlaneSensor senses drags
The Anchor node is a special-purpose action sensor with a built-in response
Syntax: TouchSensor
A TouchSensor node senses the cursor's touch:
- isOver - send true/false when cursor over/not over
- isActive - send true/false when mouse button pressed/released
- touchTime - send time when mouse button released
XML Encoding
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<Transform> <TouchSensor DEF='Touched'/> <Shape><!-- ... --></Shape> <!-- ... --> </Transform> |
Classic Encoding
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Transform { children [ DEF Touched TouchSensor { } Shape { ... } ... ] } |
A sample use of a TouchSensor node
XML Encoding
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<TouchSensor DEF='Touch'/> <TimeSensor DEF='Timer1' ... /> <OrientationInterpolator DEF='Rot1' ... /> <Transform DEF='Frame1' <Shape><!-- ... --></Shape> </Transform> <ROUTE fromNode='Touch' fromField='touchTime' toNode='Timer1' toField='set_startTime'/> <ROUTE fromNode='Timer1' fromField='fraction_changed' toNode='Rot1' toField='set_fraction'/> <ROUTE fromNode='Rot1' fromField='value_changed' toNode='Frame1' toField='set_rotation'/> |
Classic Encoding
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DEF Touch TouchSensor { } DEF Timer1 TimeSensor { ... } DEF Rot1 OrientationInterpolator { ... } DEF Frame1 Transform { children [ Shape { ... } ] } ROUTE Touch.touchTime TO Timer1.set_startTime ROUTE Timer1.fraction_changed TO Rot1.set_fraction ROUTE Rot1.value_changed TO Frame1.set_rotation |
Syntax: SphereSensor
A SphereSensor node senses a cursor drag and generates rotations as if rotating a ball:
- isActive - sends true/false when mouse button pressed/released
- rotation_changed - sends rotation during a drag
XML Encoding
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<Transform> <SphereSensor DEF='Rotator'/> <Transform DEF='RotateMe'><!-- ... --></Transform> </Transform> <ROUTE fromNode='Rotator' fromField='rotation_changed' toNode='RotateMe' toField='set_rotation'/> |
Classic Encoding
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Transform { children [ DEF Rotator SphereSensor { } DEF RotateMe Transform { ... } ] } ROUTE Rotator.rotation_changed TO RotateMe.set_rotation |
Syntax: CylinderSensor
A CylinderSensor node senses a cursor drag and generates rotations as if rotating a cylinder:
- isActive - sends true/false when mouse button pressed/released
- rotation_changed - sends rotation during a drag
XML Encoding
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<Transform> <CylinderSensor DEF='Rotator'/> <Transform DEF='RotateMe'><!-- ... --></Transform> </Transform> <ROUTE fromNode='Rotator' fromField='rotation_changed' toNode='RotateMe' toField='set_rotation'/> |
Classic Encoding
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Transform { children [ DEF Rotator CylinderSensor { } DEF RotateMe Transform { ... } ] } ROUTE Rotator.rotation_changed TO RotateMe.set_rotation |
Syntax: PlaneSensor
A PlaneSensor node senses a cursor drag and generates translations as if sliding on a plane:
- isActive - sends true/false when mouse button pressed/released
- translation_changed - sends translations during a drag
XML Encoding
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<Transform> <PlaneSensor DEF='Mover'/> <Transform DEF='MoveMe'><!-- ... --></Transform> </Transform> <ROUTE fromNode='Mover' fromField='translation_changed' toNode='MoveMe' toField='set_translation'/> |
Classic Encoding
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Transform { children [ DEF Mover PlaneSensor { } DEF MoveMe Transform { ... } ] } ROUTE Mover.translation_changed TO MoveMe.set_translation |