{ "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":"AcousticTransmissionCylinderPrototype.x3d" }, { "@name":"description", "@content":"An acoustic transmission cylinder has a moving inner radius and a constant (maximum) outer radius, visualizing the pulse width of cylindrical propagation." }, { "@name":"creator", "@content":"Don Brutzman and Oliver Tan" }, { "@name":"created", "@content":"11 May 2004" }, { "@name":"modified", "@content":"20 October 2019" }, { "@name":"subject", "@content":"Acoustic transmission" }, { "@name":"identifier", "@content":"https://www.web3d.org/x3d/content/examples/Savage/CommunicationsAndSensors/SeaWeb/AcousticTransmissionCylinderPrototype.x3d" }, { "@name":"generator", "@content":"X3D-Edit 3.2, https://www.web3d.org/x3d/tools/X3D-Edit" }, { "@name":"license", "@content":"../../license.html" }, { "@name":"translated", "@content":"21 April 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":[ { "ProtoDeclare": { "@name":"AcousticTransmissionCylinder", "@appinfo":"AcousticTransmissionCylinder visualizes the pulse width of cylindrical propagation with has a receding inner radius and a (maximum outer radius .", "ProtoInterface": { "field": [ { "@name":"startTransmission", "@accessType":"inputOnly", "@appinfo":"Upon receipt of a boolean true event start a single (not continuous) transmission", "@type":"SFBool" }, { "@name":"startContinuousTransmissions", "@accessType":"inputOnly", "@appinfo":"Upon receipt of a boolean true event start continuous transmissions", "@type":"SFBool" }, { "@name":"set_range", "@accessType":"inputOnly", "@appinfo":"Propagation range in meters", "@type":"SFFloat" }, { "@name":"defaultRange", "@accessType":"initializeOnly", "@appinfo":"Default propagation range in meters", "@type":"SFFloat", "@value":2 }, { "@name":"transmissionPropagationSpeed", "@accessType":"initializeOnly", "@appinfo":"Speed in meters / second", "@type":"SFFloat", "@value":1500 }, { "@name":"set_transmissionDuration", "@accessType":"inputOnly", "@appinfo":"Duration in seconds", "@type":"SFFloat" }, { "@name":"transmissionDuration", "@accessType":"initializeOnly", "@appinfo":"Duration in seconds", "@type":"SFFloat", "@value":5 }, { "@name":"set_beamCount", "@accessType":"inputOnly", "@appinfo":"Number of segmented sections in 360-degree cylindrical beam", "@type":"SFInt32" }, { "@name":"beamCount", "@accessType":"initializeOnly", "@appinfo":"number of segmented sections in 360-degree cylindrical beam", "@type":"SFInt32", "@value":0 }, { "@name":"height", "@accessType":"initializeOnly", "@appinfo":"Height of cylinder in meters", "@type":"SFFloat", "@value":2 }, { "@name":"set_color", "@accessType":"inputOnly", "@appinfo":"Color of cylinder", "@type":"SFColor" }, { "@name":"color", "@accessType":"initializeOnly", "@appinfo":"Default color of cylinder", "@type":"SFColor", "@value":[1,1,0.2] }, { "@name":"traceEnabled", "@accessType":"initializeOnly", "@type":"SFBool", "@value":false } ] }, "ProtoBody": { "-children":[ { "Group": { "-children":[ { "Shape": { "-geometry": { "Extrusion": { "@DEF":"TransmissionProfile", "@beginCap":false, "@convex":false, "@creaseAngle":3.14, "@endCap":false } }, "-appearance": { "Appearance": { "-material": { "Material": { "@DEF":"TransmissionProfileMaterial" } } } } } }, { "TimeSensor": { "@DEF":"AnimationClock" } }, { "TimeSensor": { "@DEF":"RestartClock" } }, { "ROUTE": { "@fromField":"cycleTime", "@fromNode":"RestartClock", "@toField":"set_startTime", "@toNode":"AnimationClock" } }, { "Script": { "@DEF":"TransmissionPropagationScript", "@directOutput":true, "field": [ { "@name":"startTransmission", "@accessType":"inputOnly", "@type":"SFBool" }, { "@name":"startContinuousTransmissions", "@accessType":"inputOnly", "@type":"SFBool" }, { "@name":"set_range", "@accessType":"inputOnly", "@type":"SFFloat" }, { "@name":"defaultRange", "@accessType":"initializeOnly", "@type":"SFFloat" }, { "@name":"transmissionPropagationSpeed", "@accessType":"initializeOnly", "@type":"SFFloat" }, { "@name":"set_transmissionDuration", "@accessType":"inputOnly", "@appinfo":"Duration in seconds", "@type":"SFFloat" }, { "@name":"transmissionDuration", "@accessType":"initializeOnly", "@appinfo":"Duration in seconds", "@type":"SFFloat" }, { "@name":"outerRadius", "@accessType":"initializeOnly", "@type":"SFFloat", "@value":0 }, { "@name":"innerRadius", "@accessType":"initializeOnly", "@type":"SFFloat", "@value":0 }, { "@name":"height", "@accessType":"initializeOnly", "@type":"SFFloat" }, { "@name":"set_fraction", "@accessType":"inputOnly", "@type":"SFFloat" }, { "@name":"animationDuration", "@accessType":"outputOnly", "@type":"SFTime" }, { "@name":"restartClockDuration", "@accessType":"outputOnly", "@type":"SFTime" }, { "@name":"loopAnimation", "@accessType":"outputOnly", "@type":"SFBool" }, { "@name":"position", "@accessType":"initializeOnly", "@type":"MFVec2f", "-children":[ { "#comment":"no initialization value, use default" } ] }, { "@name":"set_beamCount", "@accessType":"inputOnly", "@appinfo":"Number of segmented sections in 360-degree cylindrical beam", "@type":"SFInt32" }, { "@name":"beamCount", "@accessType":"initializeOnly", "@appinfo":"number of segmented sections in 360-degree cylindrical beam", "@type":"SFInt32" }, { "@name":"newSpine", "@accessType":"initializeOnly", "@appinfo":"holding variable for intermediate computations", "@type":"MFVec3f" }, { "@name":"spine", "@accessType":"initializeOnly", "@appinfo":"horizontal circular spine along central perimeter of rectangular transmission boundaries for each beam", "@type":"MFVec3f", "@value":[1.00,0.00,0.00,0.92,0.00,-0.38,0.71,0.00,-0.71,0.38,0.00,-0.92,0.00,0.00,-1.00,-0.38,0.00,-0.92,-0.71,0.00,-0.71,-0.92,0.00,-0.38,-1.00,0.00,-0.00,-0.92,0.00,0.38,-0.71,0.00,0.71,-0.38,0.00,0.92,0.00,0.00,1.00,0.38,0.00,0.92,0.71,0.00,0.71,0.92,0.00,0.38,1.00,0.00,0.00] }, { "@name":"crossSection", "@accessType":"initializeOnly", "@appinfo":"vertical rectangular outline from inner radius to outer radius", "@type":"MFVec2f", "-children":[ { "#comment":"no initialization value, use default" } ] }, { "@name":"set_color", "@accessType":"inputOnly", "@type":"SFColor" }, { "@name":"color", "@accessType":"initializeOnly", "@type":"SFColor" }, { "@name":"transparency", "@accessType":"initializeOnly", "@type":"SFFloat", "@value":0 }, { "@name":"animationStartTime", "@accessType":"outputOnly", "@type":"SFTime" }, { "@name":"loopStartTime", "@accessType":"outputOnly", "@type":"SFTime" }, { "@name":"crossSection_changed", "@accessType":"outputOnly", "@type":"MFVec2f" }, { "@name":"spine_changed", "@accessType":"outputOnly", "@type":"MFVec3f" }, { "@name":"transparency_changed", "@accessType":"outputOnly", "@type":"SFFloat" }, { "@name":"signalProfileMaterial", "@accessType":"initializeOnly", "@type":"SFNode", "-children":[ { "Material": { "@USE":"TransmissionProfileMaterial" } } ] }, { "@name":"traceEnabled", "@accessType":"initializeOnly", "@type":"SFBool" } ], "IS": { "connect": [ { "@nodeField":"startTransmission", "@protoField":"startTransmission" }, { "@nodeField":"startContinuousTransmissions", "@protoField":"startContinuousTransmissions" }, { "@nodeField":"set_range", "@protoField":"set_range" }, { "@nodeField":"defaultRange", "@protoField":"defaultRange" }, { "@nodeField":"transmissionPropagationSpeed", "@protoField":"transmissionPropagationSpeed" }, { "@nodeField":"set_transmissionDuration", "@protoField":"set_transmissionDuration" }, { "@nodeField":"transmissionDuration", "@protoField":"transmissionDuration" }, { "@nodeField":"set_beamCount", "@protoField":"set_beamCount" }, { "@nodeField":"beamCount", "@protoField":"beamCount" }, { "@nodeField":"height", "@protoField":"height" }, { "@nodeField":"set_color", "@protoField":"set_color" }, { "@nodeField":"color", "@protoField":"color" }, { "@nodeField":"traceEnabled", "@protoField":"traceEnabled" } ] }, "#sourceCode":[ "", "", "ecmascript:", "", "function initialize()", "{", "\touterRadius = -1.0;", "\tinnerRadius = -1.0;", "", "\tanimationDuration = defaultRange / transmissionPropagationSpeed + transmissionDuration;", "", "\ttracePrint('beamCount = ' + beamCount);", "\ttracePrint('defaultRange = ' + defaultRange);", "\ttracePrint('animationDuration=' + animationDuration);", "\ttracePrint('transmissionPropagationSpeed=' + transmissionPropagationSpeed);", "", "\tcomputeSpine(beamCount);", "", " updateCrossSection(0);", "", "\tupdateExtrusionShape(crossSection, spine, color);", "}", "function updateRadii(fraction)", "{", "\t_transmissionPropagationDuration = defaultRange / transmissionPropagationSpeed;", "\t_animationDuration = _transmissionPropagationDuration + transmissionDuration;", "\t_spineRadius = 1;", "\t", "\touterRadius = fraction * _animationDuration * transmissionPropagationSpeed - _spineRadius;", "", "\tif (outerRadius > (defaultRange - _spineRadius)) {", "\t\touterRadius = defaultRange - _spineRadius;", "\t}", "", "\tif ((fraction * _animationDuration) > (_transmissionPropagationDuration + transmissionDuration * 7/8)) ", "\t{", "\t\ttransparency_changed = ( (fraction * _animationDuration) - (_transmissionPropagationDuration + transmissionDuration * 7/8) ) / (transmissionDuration * 1/8);", "\t}", "", "\tif ((fraction * _animationDuration) <= transmissionDuration)", "\t{", "\t\tinnerRadius = -_spineRadius;", "\t} else {", "\t\tinnerRadius = ((fraction * _animationDuration) - transmissionDuration) * transmissionPropagationSpeed - _spineRadius;", "\t\tif (innerRadius > defaultRange) {", "\t\t\tinnerRadius = defaultRange;", "\t\t}", "\t}", "", "\ttracePrint('fraction = ' + fraction);", "\ttracePrint('outerRadius = ' + outerRadius);", "\ttracePrint('innerRadius = ' + innerRadius);", "}", "function set_beamCount (beamCount)", "{", " alwaysPrint('set_beamCount(' + beamCount + '), beam spacing=' + (360/beamCount) + ' degrees');", " computeSpine(beamCount);", "}", "function computeSpine (beamCount)", "{", "\tif (beamCount < 3)", " {", " alwaysPrint('** insufficient beamCount=' + beamCount + ', ignored, spine not recomputed');", " return;", " }", " newSpine = new MFVec3f ();", " for (index = 0; index <= beamCount; index++)", "\t{", "\t\tangle = 2.0 * Math.PI * index / beamCount;", " newSpine[index] = new SFVec3f (Math.sin(angle), 0.0, Math.cos(angle));", "\t}", " newSpine[beamCount] = newSpine[0]; // ensure beginning point matches end point", " spine = newSpine;", "\ttracePrint('spine.length=' + spine.length + ', spine=' + spine);", "}", "function updateCrossSection(fraction)", "{", "\tupdateRadii(fraction);", "", "\t_spineRadius = 1;", "\t_outerHeight = Math.abs((outerRadius + _spineRadius) * Math.tan(Math.PI/6));", "", "\tif (_outerHeight > height)", "\t{", "\t\t_outerHeight = height;", "\t}", "", "\t_innerHeight = Math.abs((innerRadius + _spineRadius) * Math.tan(Math.PI/6));", "", "\tif (_innerHeight > height)", "\t{", "\t\t_innerHeight = height;", "\t}", "", "\tindex = 0;", "\tposition[index] = new SFVec2f(outerRadius, _outerHeight/2);", "\tcrossSection[index] = new SFVec2f(position[index].x, position[index].y);", "\tindex++;", "\t", "\tposition[index] = new SFVec2f(innerRadius, _innerHeight/2);", "\tcrossSection[index] = new SFVec2f(position[index].x, position[index].y);", "\tindex++;", "", "\tposition[index] = new SFVec2f(innerRadius, -_innerHeight/2);", "\tcrossSection[index] = new SFVec2f(position[index].x, position[index].y);", "\tindex++;", "", "\tposition[index] = new SFVec2f(outerRadius, -_outerHeight/2);", "\tcrossSection[index] = new SFVec2f(position[index].x, position[index].y);", "\tindex++;", "", "\tposition[index] = new SFVec2f(outerRadius, _outerHeight/2);", "\tcrossSection[index] = new SFVec2f(position[index].x, position[index].y);", "\t", "\ttracePrint('position = ' + position);", "\ttracePrint('crossSection = ' + crossSection);", "}", "function startTransmission(value, timeStamp)", "{", "\tif (value == true)", "\t{", "\t\tloopAnimation = false;", "\t\tloopStartTime = -1;", "\t\tanimationStartTime = timeStamp;", "\t\ttracePrint('startTransmission ()');", "\t}", "}", "function startContinuousTransmissions(value, timeStamp)", "{", "\tif (value == true)", "\t{", "\t\tloopAnimation = true;", "\t\tloopStartTime = timeStamp;", "\t\tanimationStartTime = timeStamp;", "\t\ttracePrint('startContinuousTransmissions ()');", "\t}", "}", "function set_range(value, timeStamp)", "{", "\tif (value >= 0)", "\t{", "\t\tdefaultRange = value;", "\t\ttracePrint('defaultRange = ' + defaultRange);", "\t}", "\telse tracePrint('set_range (' + value + '); // no response, negative');", "}", "function set_color(value, timeStamp)", "{", "\tcolor = value;", "\ttracePrint('color = ' + color);", "}", "function set_transmissionDuration(value, timeStamp)", "{", "\tif (value >= 0) ", "\t{", "\t\ttransmissionDuration = value;", "\t\tanimationDuration = defaultRange / transmissionPropagationSpeed + transmissionDuration;", "\t\trestartClockDuration = 2 * animationDuration;", "\t\ttracePrint('transmissionDuration = ' + transmissionDuration);", "\t\ttracePrint('animationDuration = ' + animationDuration);", "\t\ttracePrint('restartClockDuration = ' + restartClockDuration);", "\t}", "\telse tracePrint('set_transmissionDuration (' + value + '); // no response, negative');", "}", "function set_fraction(value, timeStamp)", "{", "\tupdateCrossSection(value);", "", "\tupdateExtrusionShape(crossSection, spine, color);", "}", "function updateExtrusionShape(crossSection, spine, color)", "{", "\t// emissiveColor appears unaffected by transparency, unfortunately", "\tsignalProfileMaterial.diffuseColor = color;", "\tsignalProfileMaterial.transparency = transparency;", "", "\ttracePrint('Updating crossSection:');", "\ttracePrint(' crossSection = ' + crossSection);", "\ttracePrint(' spine = ' + spine);", "\ttracePrint(' transparency = ' + transparency);", "", "\tcrossSection_changed = crossSection;", "\tspine_changed = spine;", "}", "function tracePrint(value)", "{", " if (traceEnabled) alwaysPrint (value);", "}", "function alwaysPrint(value)", "{", "\tBrowser.println ('[AcousticTransmissionCylinderPrototype] ' + value);", "}", "", "" ] } }, { "ROUTE": { "@fromField":"fraction_changed", "@fromNode":"AnimationClock", "@toField":"set_fraction", "@toNode":"TransmissionPropagationScript" } }, { "ROUTE": { "@fromField":"crossSection_changed", "@fromNode":"TransmissionPropagationScript", "@toField":"set_crossSection", "@toNode":"TransmissionProfile" } }, { "ROUTE": { "@fromField":"spine_changed", "@fromNode":"TransmissionPropagationScript", "@toField":"set_spine", "@toNode":"TransmissionProfile" } }, { "ROUTE": { "@fromField":"transparency_changed", "@fromNode":"TransmissionPropagationScript", "@toField":"transparency", "@toNode":"TransmissionProfileMaterial" } }, { "ROUTE": { "@fromField":"animationDuration", "@fromNode":"TransmissionPropagationScript", "@toField":"set_cycleInterval", "@toNode":"AnimationClock" } }, { "ROUTE": { "@fromField":"restartClockDuration", "@fromNode":"TransmissionPropagationScript", "@toField":"set_cycleInterval", "@toNode":"RestartClock" } }, { "ROUTE": { "@fromField":"loopAnimation", "@fromNode":"TransmissionPropagationScript", "@toField":"loop", "@toNode":"RestartClock" } }, { "ROUTE": { "@fromField":"animationStartTime", "@fromNode":"TransmissionPropagationScript", "@toField":"set_startTime", "@toNode":"AnimationClock" } }, { "ROUTE": { "@fromField":"loopStartTime", "@fromNode":"TransmissionPropagationScript", "@toField":"set_startTime", "@toNode":"RestartClock" } } ] } } ] } } }, { "#comment":"Viewable geometry for this scene is anchored text that links to an example showing ExternProtoDeclare usage of AcousticTransmissionCylinder" }, { "WorldInfo": { "@info":["Produce acoustic transmission cylinders"], "@title":"AcousticTransmissionCylinderPrototype" } }, { "Viewpoint": { "@description":"Acoustic Transmission Cylinder", "@position":[0,0,15] } }, { "Anchor": { "@description":"Acoustic Transmission Cylinder Example", "@url":["AcousticTransmissionCylinderExample.x3d","../../CommunicationsAndSensors/SeaWeb/AcousticTransmissionCylinderExample.x3d","https://www.web3d.org/x3d/content/examples/Savage/CommunicationsAndSensors/SeaWeb/AcousticTransmissionCylinderExample.x3d","AcousticTransmissionCylinderExample.wrl","../../CommunicationsAndSensors/SeaWeb/AcousticTransmissionCylinderExample.wrl","https://www.web3d.org/x3d/content/examples/Savage/CommunicationsAndSensors/SeaWeb/AcousticTransmissionCylinderExample.wrl"], "-children":[ { "Shape": { "-appearance": { "Appearance": { "-material": { "Material": { "@diffuseColor":[0,1,1], "@emissiveColor":[0,1,1] } } } }, "-geometry": { "Text": { "@string":["AcousticTransmissionCylinderPrototype","is a Prototype definition file","To see an example scene","click this text and view","AcousticTransmissionCylinderExample"], "-fontStyle": { "FontStyle": { "@justify":["MIDDLE","MIDDLE"] } } } } } } ] } } ] } } }