@prefix :        <https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter11LightingEnvironmentalEffects/BackgroundTimeOfDay.ttl#> .
@prefix owl:     <http://www.w3.org/2002/07/owl#> .
@prefix rdf:     <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs:    <http://www.w3.org/2000/01/rdf-schema#> .
@prefix schema:  <http://schema.org/> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix xsd:     <http://www.w3.org/2001/XMLSchema#> .
@prefix x3d:     <https://www.web3d.org/specifications/x3d-4.0.xsd#> .
@prefix x3do:    <https://www.web3d.org/specifications/X3dOntology4.0#> .

:X3D a owl:NamedIndividual, x3do:X3D ;
  x3do:hasHead :head ;
  x3do:hasScene :Scene ;
  x3do:profile 'Immersive' ;
  x3do:version '3.3' ;
  x3do:noNamespaceSchemaLocation 'https://www.web3d.org/specifications/x3d-3.3.xsd' .
:head a owl:NamedIndividual, x3do:head ;
  x3do:hasParent :X3D ;
  x3do:hasMeta :meta_1_1, :meta_1_2, :meta_1_3, :meta_1_4, :meta_1_5, :meta_1_6, :meta_1_7, :meta_1_8, :meta_1_9, :meta_1_10 .
:meta_1_1 a owl:NamedIndividual, x3do:meta ;
  x3do:hasParent :head ;
  x3do:content 'BackgroundTimeOfDay.x3d' ;
  x3do:name 'title' .
:meta_1_2 a owl:NamedIndividual, x3do:meta ;
  x3do:hasParent :head ;
  x3do:content 'Interpolate between Background color arrays to show a gradually changing time-of-day effect.' ;
  x3do:name 'description' .
:meta_1_3 a owl:NamedIndividual, x3do:meta ;
  x3do:hasParent :head ;
  x3do:content 'Don Brutzman and MV4205 class' ;
  x3do:name 'creator' .
:meta_1_4 a owl:NamedIndividual, x3do:meta ;
  x3do:hasParent :head ;
  x3do:content '22 April 2009' ;
  x3do:name 'created' .
:meta_1_5 a owl:NamedIndividual, x3do:meta ;
  x3do:hasParent :head ;
  x3do:content '20 October 2019' ;
  x3do:name 'modified' .
:meta_1_6 a owl:NamedIndividual, x3do:meta ;
  x3do:hasParent :head ;
  x3do:content 'https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter11LightingEnvironment/BackgroundSelector.x3d' ;
  x3do:name 'reference' .
:meta_1_7 a owl:NamedIndividual, x3do:meta ;
  x3do:hasParent :head ;
  x3do:content 'X3D Background example' ;
  x3do:name 'subject' .
:meta_1_8 a owl:NamedIndividual, x3do:meta ;
  x3do:hasParent :head ;
  x3do:content 'https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter11LightingEnvironmentalEffects/BackgroundTimeOfDay.x3d' ;
  x3do:name 'identifier' .
:meta_1_9 a owl:NamedIndividual, x3do:meta ;
  x3do:hasParent :head ;
  x3do:content 'X3D-Edit 3.3, https://www.web3d.org/x3d/tools/X3D-Edit' ;
  x3do:name 'generator' .
:meta_1_10 a owl:NamedIndividual, x3do:meta ;
  x3do:hasParent :head ;
  x3do:content '../license.html' ;
  x3do:name 'license' .
:meta dcterms:title "BackgroundTimeOfDay.x3d" .
:meta dcterms:description "Interpolate between Background color arrays to show a gradually changing time-of-day effect." .
:meta dcterms:creator "Don Brutzman and MV4205 class" .
:meta dcterms:created "22 April 2009" .
:meta dcterms:modified "20 October 2019" .
:meta dcterms:reference "https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter11LightingEnvironment/BackgroundSelector.x3d" .
:meta dcterms:subject "X3D Background example" .
:meta dcterms:identifier "https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter11LightingEnvironmentalEffects/BackgroundTimeOfDay.x3d" .
:meta dcterms:generator "X3D-Edit 3.3, https://www.web3d.org/x3d/tools/X3D-Edit" .
:meta dcterms:license "../license.html" .
:Scene a owl:NamedIndividual, x3do:Scene ;
  x3do:hasParent :X3D ;
  x3do:hasChildren :WorldInfo_2_1, :Transform_2_2, :TimeOfDayClock, :BackgroundColorInterpolator, :AnimatedBackground ;
  x3do:hasROUTE :ROUTE_2_5, :ROUTE_2_7, :ROUTE_2_8 .
:WorldInfo_2_1 a owl:NamedIndividual, x3do:WorldInfo ;
  x3do:hasParent :Scene ;
  x3do:title 'BackgroundTimeOfDay.x3d' .
:Transform_2_2 a owl:NamedIndividual, x3do:Transform ;
  x3do:hasParent :Scene ;
  x3do:hasChildren :Shape_2_2_1 ;
  x3do:translation ( 0 3 0 ) .
:Shape_2_2_1 a owl:NamedIndividual, x3do:Shape ;
  x3do:hasParent :Transform_2_2 ;
  x3do:hasGeometry :Text_2_2_1_1 ;
  x3do:hasAppearance :Appearance_2_2_1_2 .
:Text_2_2_1_1 a owl:NamedIndividual, x3do:Text ;
  x3do:hasParent :Shape_2_2_1 ;
  x3do:hasFontStyle :FontStyle_2_2_1_1_1 ;
  x3do:string '"Background Time Of Day"' .
:FontStyle_2_2_1_1_1 a owl:NamedIndividual, x3do:FontStyle ;
  x3do:hasParent :Text_2_2_1_1 ;
  x3do:justify '"MIDDLE" "MIDDLE"' .
:Appearance_2_2_1_2 a owl:NamedIndividual, x3do:Appearance ;
  x3do:hasParent :Shape_2_2_1 ;
  x3do:hasMaterial :Material_2_2_1_2_1 .
:Material_2_2_1_2_1 a owl:NamedIndividual, x3do:Material ;
  x3do:hasParent :Appearance_2_2_1_2 .
:TimeOfDayClock a owl:NamedIndividual, x3do:TimeSensor ;
  x3do:hasParent :Scene ;
  x3do:DEF 'TimeOfDayClock' ;
  x3do:cycleInterval '6' ;
  x3do:loop true .
:BackgroundColorInterpolator a owl:NamedIndividual, x3do:Script ;
  x3do:hasParent :Scene ;
  x3do:hasField :field_2_4_1, :field_2_4_2, :field_2_4_3, :field_2_4_4, :field_2_4_5, :field_2_4_6, :field_2_4_7, :field_2_4_8, :field_2_4_9, :field_2_4_10, :field_2_4_11 ;
  x3do:DEF 'BackgroundColorInterpolator' ;
  x3do:sourceCode """
ecmascript:

function initialize()
{
    Browser.println ('groundColorSunrise length=' + groundColorSunrise.length + ' '  + groundColorSunrise.toString());
    Browser.println ('groundColorNoon    length=' +    groundColorNoon.length +    ' '  + groundColorNoon.toString());
    Browser.println ('groundColorSunset  length=' +  groundColorSunset.length +  ' '  + groundColorSunset.toString());
    Browser.println ('groundColorNight   length=' +   groundColorNight.length +   ' '  + groundColorNight.toString());
    Browser.println ('skyColorSunrise    length=' +    skyColorSunrise.length +    ' '  + skyColorSunrise.toString());
    Browser.println ('skyColorNoon       length=' +       skyColorNoon.length +       ' '  + skyColorNoon.toString());
    Browser.println ('skyColorSunset     length=' +     skyColorSunset.length +     ' '  + skyColorSunset.toString());
    Browser.println ('skyColorNight      length=' +      skyColorNight.length +      ' '  + skyColorNight.toString());
}
function set_fraction (fraction) // fraction is input value sent by TimeSensor clock
{
    // Sunrise to Noon, fraction 0.0 to 0.25, interval=0.25
    if      (fraction < 0.25)
    {
        groundColor_changed = interpolate (groundColorSunrise, groundColorNoon, fraction, 0.00, 0.25);
           skyColor_changed = interpolate (   skyColorSunrise,    skyColorNoon, fraction, 0.00, 0.25);
    }
    // Noon to Evening, fraction 0.25 to 0.5, interval=0.25
    else if (fraction < 0.5)
    {
        groundColor_changed = interpolate (groundColorNoon, groundColorSunset, fraction, 0.25, 0.25);
           skyColor_changed = interpolate (   skyColorNoon,    skyColorSunset, fraction, 0.25, 0.25);
    }
    // Evening to Night, fraction 0.5 to 0.6, interval=0.1
    else if (fraction < 0.6)
    {
        groundColor_changed = interpolate (groundColorSunset, groundColorNight, fraction, 0.5, 0.1);
           skyColor_changed = interpolate (   skyColorSunset,    skyColorNight, fraction, 0.5, 0.1);
    }
    // Night (unchanging), fraction 0.6 to 0.95, interval=0.35
    else if (fraction < 0.95)
    {
        groundColor_changed = groundColorNight;
           skyColor_changed = skyColorNight;
    }
    // Night to Sunrise, fraction 0.95 to 1.0, interval=0.05
    else // (fraction < 1.0)
    {
        groundColor_changed = interpolate (groundColorNight, groundColorSunrise, fraction, 0.95, 0.05);
           skyColor_changed = interpolate (   skyColorNight,    skyColorSunrise, fraction, 0.95, 0.05);
    }
//    Browser.println ('groundColor_changed=' + groundColor_changed.toString());
//    Browser.println ('   skyColor_changed=' +    skyColor_changed.toString());
}
function interpolate (firstColorArray, secondColorArray, fraction, initialFraction, interval)
{
    f = (fraction - initialFraction) / interval; // f should range from 0 to 1
//  Browser.println ('initialFraction=' + initialFraction + ', fraction=' + fraction + ', f=' + f);

    color0 = firstColorArray[0] + (secondColorArray[0] - firstColorArray[0]) * f;
    color1 = firstColorArray[1] + (secondColorArray[1] - firstColorArray[1]) * f;
    color2 = firstColorArray[2] + (secondColorArray[2] - firstColorArray[2]) * f;
    color3 = firstColorArray[3] + (secondColorArray[3] - firstColorArray[3]) * f;
    color4 = firstColorArray[4] + (secondColorArray[4] - firstColorArray[4]) * f;
    return new MFColor (color0, color1, color2, color3, color4);
}
""" .
:field_2_4_1 a owl:NamedIndividual, x3do:field ;
  x3do:hasParent :BackgroundColorInterpolator ;
  x3do:accessType 'inputOnly' ;
  x3do:name 'set_fraction' ;
  x3do:type 'SFFloat' .
:field_2_4_2 a owl:NamedIndividual, x3do:field ;
  x3do:hasParent :BackgroundColorInterpolator ;
  x3do:accessType 'initializeOnly' ;
  x3do:name 'groundColorSunrise' ;
  x3do:type 'MFColor' ;
  x3do:value ( 0.133 0.419 0 0.36 0.1 0 1 0.74 0.4 1 0.74 0.4 0 0.2 0.75 0 0.1 0.5 ) .
:field_2_4_3 a owl:NamedIndividual, x3do:field ;
  x3do:hasParent :BackgroundColorInterpolator ;
  x3do:accessType 'initializeOnly' ;
  x3do:name 'groundColorNoon' ;
  x3do:type 'MFColor' ;
  x3do:value ( 0.133 0.419 0 0.36 0.1 0 1 0.74 0.4 1 0.74 0.4 0 0 0.5 0 0 0.2 ) .
:field_2_4_4 a owl:NamedIndividual, x3do:field ;
  x3do:hasParent :BackgroundColorInterpolator ;
  x3do:accessType 'initializeOnly' ;
  x3do:name 'groundColorSunset' ;
  x3do:type 'MFColor' ;
  x3do:value ( 0.133 0.419 0 0.36 0.1 0 1 0.74 0.4 1 0.74 0.4 0 0 0.5 0 0 0.2 ) .
:field_2_4_5 a owl:NamedIndividual, x3do:field ;
  x3do:hasParent :BackgroundColorInterpolator ;
  x3do:accessType 'initializeOnly' ;
  x3do:name 'groundColorNight' ;
  x3do:type 'MFColor' ;
  x3do:value ( 0.133 0.419 0 0.36 0.1 0 1 0.74 0.4 1 0.74 0.4 0 0 0.5 0 0 0.2 ) .
:field_2_4_6 a owl:NamedIndividual, x3do:field ;
  x3do:hasParent :BackgroundColorInterpolator ;
  x3do:accessType 'initializeOnly' ;
  x3do:name 'skyColorSunrise' ;
  x3do:type 'MFColor' ;
  x3do:value ( 1 1 0.2 1 1 0 0.36 0.63 1 0 0.4 1 0 0.4 1 ) .
:field_2_4_7 a owl:NamedIndividual, x3do:field ;
  x3do:hasParent :BackgroundColorInterpolator ;
  x3do:accessType 'initializeOnly' ;
  x3do:name 'skyColorNoon' ;
  x3do:type 'MFColor' ;
  x3do:value ( 0 0.035 0.34 0 0.015 0.44 0 0.05 0.5 0 0.1 0.6 0.44 0.8 1 1 1 0.7 ) .
:field_2_4_8 a owl:NamedIndividual, x3do:field ;
  x3do:hasParent :BackgroundColorInterpolator ;
  x3do:accessType 'initializeOnly' ;
  x3do:name 'skyColorSunset' ;
  x3do:type 'MFColor' ;
  x3do:value ( 0 0 0.38 0 0 0.68 0.5 0.2 1 0.5 0.2 1 1 0.3 0 1 0.2 0.8 ) .
:field_2_4_9 a owl:NamedIndividual, x3do:field ;
  x3do:hasParent :BackgroundColorInterpolator ;
  x3do:accessType 'initializeOnly' ;
  x3do:name 'skyColorNight' ;
  x3do:type 'MFColor' ;
  x3do:value ( 1 1 1 0.8 0.8 0.8 0.1 0.1 0.1 0 0 0 0 0 0 ) .
:field_2_4_10 a owl:NamedIndividual, x3do:field ;
  x3do:hasParent :BackgroundColorInterpolator ;
  x3do:accessType 'outputOnly' ;
  x3do:name 'groundColor_changed' ;
  x3do:type 'MFColor' .
:field_2_4_11 a owl:NamedIndividual, x3do:field ;
  x3do:hasParent :BackgroundColorInterpolator ;
  x3do:accessType 'outputOnly' ;
  x3do:name 'skyColor_changed' ;
  x3do:type 'MFColor' .
:ROUTE_2_5 a owl:NamedIndividual, x3do:ROUTE ;
  x3do:hasParent :Scene ;
  x3do:fromField 'fraction_changed' ;
  x3do:fromNode 'TimeOfDayClock' ;
  x3do:toField 'set_fraction' ;
  x3do:toNode 'BackgroundColorInterpolator' .
:AnimatedBackground a owl:NamedIndividual, x3do:Background ;
  x3do:hasParent :Scene ;
  x3do:DEF 'AnimatedBackground' ;
  x3do:groundAngle ( 0.03 1.26 1.5 1.57 ) ;
  x3do:groundColor ( 0.133333 0.419608 0 0.36 0.1 0 1 0.74 0.4 0 0 0.5 0 0 0.2 ) ;
  x3do:skyAngle ( 0.03 0.05 1.5 1.57 ) ;
  x3do:skyColor ( 1 1 1 0.8 0.8 0.8 0.1 0.1 0.1 0 0 0 0 0 0 ) .
:ROUTE_2_7 a owl:NamedIndividual, x3do:ROUTE ;
  x3do:hasParent :Scene ;
  x3do:fromField 'groundColor_changed' ;
  x3do:fromNode 'BackgroundColorInterpolator' ;
  x3do:toField 'groundColor' ;
  x3do:toNode 'AnimatedBackground' .
:ROUTE_2_8 a owl:NamedIndividual, x3do:ROUTE ;
  x3do:hasParent :Scene ;
  x3do:fromField 'skyColor_changed' ;
  x3do:fromNode 'BackgroundColorInterpolator' ;
  x3do:toField 'skyColor' ;
  x3do:toNode 'AnimatedBackground' .