#VRML V2.0 utf8
#
#  Load VRML using a script
#  loader.wrl
#	by David R. Nadeau
#
#  This example illustrates use of a JavaScript/VRMLscript script that
#  loads VRML from a file through use of the Browser object.  When
#  sent a URL for a file to load, the script loads it, waits for the
#  load to complete, then adds the loaded shape into a group.
#

WorldInfo {
	title "Load VRML using a script"
	info [ "Copyright (c) 1998, David R. Nadeau" ]
}

NavigationInfo {
	type [ "EXAMINE", "ANY" ]
	headlight TRUE
}

Viewpoint {
	position 0.0 0.0 10.0
	description "Entry view"
}

Background {
    skyColor [
        0.0 0.0 0.0,
        0.0 0.0 0.0,
        0.0 0.8 0.2,
        0.0 0.0 0.0,
    ]
    skyAngle [
        1.37
        1.57,
        1.77,
    ]
}

EXTERNPROTO Button [
	field SFVec3f translation
	field MFString texture
	field MFString url
	eventOut MFString url_changed
] "button.wrl#Button"


#
#  Button shapes
#
DEF Button1 Button {
	translation -4.0 2.0 0.0
	url "one.wrl"
	texture "one.jpg"
}
DEF Button2 Button {
	translation -4.0 0.0 0.0
	url "two.wrl"
	texture "two.jpg"
}
DEF Button3 Button {
	translation -4.0 -2.0 0.0
	url "three.wrl"
	texture "three.jpg"
}

#
#  Label indicating what file is currently loaded
#
Transform {
	translation -4.0 -3.5 0.0
	children Shape {
		appearance Appearance {
			material Material { }
		}
		geometry DEF Label Text {
			string ""
			fontStyle FontStyle {
				size 0.75
				justify "MIDDLE"
			}
		}
	}
}

#
#  Group to hold loaded data
#
DEF Loaded Transform {
	translation 1.0 0.0 0.0
	children [ ]
}

#
#  Script to load the data when it is sent a URL
#
DEF Loader Script {
	field SFNode myself USE Loader
	field MFString lastUrl ""
	eventIn  MFString loadUrl
	eventIn  MFNode   vrmlLoaded
	eventOut MFNode   node_changed
	eventOut MFString string_changed
	url "vrmlscript:
		function loadUrl( str, ts ) {
			lastUrl = str;
			Browser.createVrmlFromURL( str, myself, 'vrmlLoaded' );
			string_changed[0] = 'Loading...';
		}
		function vrmlLoaded( nd, ts ) {
			node_changed = nd;
			string_changed[0] = lastUrl[0];
		}
	"
}

ROUTE Button1.url_changed   TO Loader.loadUrl
ROUTE Button2.url_changed   TO Loader.loadUrl
ROUTE Button3.url_changed   TO Loader.loadUrl
ROUTE Loader.node_changed   TO Loaded.set_children
ROUTE Loader.string_changed TO Label.set_string