{ "X3D": { "encoding":"UTF-8", "@profile":"Immersive", "@version":"3.0", "@xsd:noNamespaceSchemaLocation":"https://www.web3d.org/specifications/x3d-3.0.xsd", "JSON schema":"https://www.web3d.org/specifications/x3d-4.0-JSONSchema.autogenerated.json", "head": { "meta": [ { "@name":"title", "@content":"SuperCobraSectionFormBearingDisplay.x3d" }, { "@name":"description", "@content":"A demonstration of a Cobra helicopter section using cruise turn principles to conserve fuel" }, { "@name":"creator", "@content":"Maj C. B. Lakey, USMC" }, { "@name":"translator", "@content":"Xeena VRML importer, X3D-Edit 3.1, https://www.web3d.org/x3d/content/README.X3D-Edit.html" }, { "@name":"created", "@content":"10 March 2005" }, { "@name":"translated", "@content":"10 March 2005" }, { "@name":"modified", "@content":"12 October 2023" }, { "@name":"reference", "@content":"AH1wSuperCobra-MV3204FinalProjectReport.pdf" }, { "@name":"identifier", "@content":"https://www.web3d.org/x3d/content/examples/Savage/AircraftHelicopters/AH1wUnitedStates/SuperCobraSectionFormBearingDisplay.x3d" }, { "@name":"generator", "@content":"X3D-Edit 4.0, https://www.web3d.org/x3d/tools/X3D-Edit" }, { "@name":"generator", "@content":"Vrml97ToX3dNist, http://ovrt.nist.gov/v2_x3d.html" }, { "@name":"reference", "@content":"http://www.goldwave.com; Goldwave commercial audio creation software used to generate wav file representing sound of rotors turning" }, { "@name":"license", "@content":"../../license.html" }, { "@name":"translated", "@content":"26 March 2026" }, { "@name":"generator", "@content":"X3dToJson.xslt, https://www.web3d.org/x3d/stylesheets/X3dToJson.html" }, { "@name":"reference", "@content":"X3D JSON encoding: https://www.web3d.org/wiki/index.php/X3D_JSON_Encoding" } ] }, "Scene": { "-children":[ { "#comment":"Background simulates an overwater scene" }, { "WorldInfo": { "@title":"SuperCobraSectionFormBearingDisplay.x3d" } }, { "Background": { 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"Group": { "@DEF":"SingleAircraftOrientationGroup", "-children":[ { "Transform": { "@DEF":"AircraftRollTransformation", "@rotation":[0,0,1,0.785], "-children":[ { "#comment":"The single aircraft group contains an inline of an AH-1W SuperCobra model; it currently uses the model with no animated lights; although there is also a model with lights animated, it is not advisable to inline it unless the CPU used is capable of high clock cycles (> 3 GHz)" }, { "Group": { "@DEF":"SingleAircraftGroup", "-children":[ { "Transform": { "@rotation":[0,1,0,-1.57079], "-children":[ { "Inline": { "@url":["SuperCobra.x3d","https://www.web3d.org/x3d/content/examples/Savage/AircraftHelicopters/AH1wUnitedStates/SuperCobra.x3d","SuperCobra.wrl","https://www.web3d.org/x3d/content/examples/Savage/AircraftHelicopters/AH1wUnitedStates/SuperCobra.wrl"] } } ] } }, { "Sound": { "@maxBack":150, "@maxFront":150, "@minBack":3, "@minFront":3, "-source": { "AudioClip": { "@description":"Helicopter rotors turning", "@loop":true, "@url":["sounds/rotors.wav","https://www.web3d.org/x3d/content/examples/Savage/AircraftHelicopters/AH1wUnitedStates/rotors.wav"] } } } } ] } } ] } }, { "#comment":"The DashTwo AnimatedGroup contains all transformations that are distinc from the Lead aircraft (i.e., roll angle and bearing)" }, { "Group": { "@DEF":"DashTwoAnimatedGroup", "-children":[ { "TimeSensor": { "@DEF":"DashTwoBearingClock", "@cycleInterval":15, "@loop":true } }, { "Transform": { "@DEF":"DashTwoBearingTransformation", "@translation":[10,1,-10], "-children":[ { "Group": { "@DEF":"DashTwoOrientationGroup", "-children":[ { "#comment":"DashTwoRollTransformation contains a'USE' node for the single aircraft, as well as two viewing nodes; the viewing nodes are slaved to the wingman position: one is a cockpit view, while the other is stationed approximately 20 meters behind the wingman" }, { "Transform": { "@DEF":"DashTwoRollTransformation", "@rotation":[0,0,1,-0.15], "-children":[ { "Group": { "@USE":"SingleAircraftGroup" } }, { "Viewpoint": { "@DEF":"Chasecam1", "@description":"Dash two chase camera", "@fieldOfView":1, "@orientation":[0,1,0,3.14], "@position":[0,5,-20] } }, { "Viewpoint": { "@DEF":"Chasecam2", "@description":"Dash two cockpit camera", "@fieldOfView":1, "@orientation":[0,1,0,3.14], "@position":[0,0,2.2] } } ] } } ] } }, { "#comment":"The itnerpolators and routing nodes combine to describe the roll and position changes of the wingman" }, { "PositionInterpolator": { "@DEF":"DashTwoBearingPositionInterpolator", "@key":[0.00,0.01,0.05,0.25,0.45,0.49,0.50,0.51,0.55,0.75,0.95,0.9999], "@keyValue":[15,5,-15,14,5,-15,12,5,-15,0,5,-12,-12,5,-8,-14,5,-6,-15,5,-5,-14,5,-6,-12,5,-8,0,5,-12,12,5,-15,14,5,-15] } }, { "ROUTE": { "@fromField":"fraction_changed", "@fromNode":"DashTwoBearingClock", "@toField":"set_fraction", "@toNode":"DashTwoBearingPositionInterpolator" } }, { "ROUTE": { "@fromField":"value_changed", "@fromNode":"DashTwoBearingPositionInterpolator", "@toField":"set_translation", "@toNode":"DashTwoBearingTransformation" } }, { "OrientationInterpolator": { "@DEF":"DashTwoRollOrientationInterpolator", "@key":[0.000,0.004,0.005,0.010,0.050,0.250,0.450,0.490,0.495,0.496,0.500,0.504,0.505,0.510,0.550,0.750,0.950,0.990,0.995,0.996], "@keyValue":[0,0,1,1.000,0,0,1,1.000,0,0,1,1.000,0,0,1,0.990,0,0,1,0.950,0,0,1,0.600,0,0,1,0.050,0,0,1,0.010,0,0,1,0.000,0,0,1,0.000,0,0,1,0.000,0,0,1,0.000,0,0,1,0.000,0,0,1,0.010,0,0,1,0.050,0,0,1,0.600,0,0,1,0.950,0,0,1,0.990,0,0,1,1.000,0,0,1,1.000] } }, { "ROUTE": { "@fromField":"fraction_changed", "@fromNode":"DashTwoBearingClock", "@toField":"set_fraction", "@toNode":"DashTwoRollOrientationInterpolator" } }, { "ROUTE": { "@fromField":"value_changed", "@fromNode":"DashTwoRollOrientationInterpolator", "@toField":"set_rotation", "@toNode":"DashTwoRollTransformation" } } ] } } ] } } ] } }, { "Viewpoint": { "@DEF":"Chasecam3", "@description":"Section chase camera", "@fieldOfView":1, "@orientation":[0,1,0,3.14], "@position":[0,5,-35] } } ] } }, { "OrientationInterpolator": { "@DEF":"AircraftPathOrientationInterpolator", "@key":[0.0,0.5,1.0], "@keyValue":[0,1,0,0.0,0,1,0,-3.14,0,1,0,-6.28] } }, { "ROUTE": { "@fromField":"fraction_changed", "@fromNode":"AircraftPathClock", "@toField":"set_fraction", "@toNode":"AircraftPathOrientationInterpolator" } }, { "ROUTE": { "@fromField":"value_changed", "@fromNode":"AircraftPathOrientationInterpolator", "@toField":"set_rotation", "@toNode":"AircraftPathTransformation" } }, { "#comment":"The overhead view is transformed up along the Y-axis prior to orienting it straight downward" }, { "Transform": { "@DEF":"OverheadViewTransform", "@translation":[0,40,0], "-children":[ { "Viewpoint": { "@DEF":"Overheadcam", "@description":"Overhead view of cruise turns", "@fieldOfView":2, "@orientation":[1,0,0,-1.57] } } ] } } ] } } ] } } }