用PHP动态生成虚拟现实VRML网页

由于VRML博大精深，这里只介绍一个简单的例子，还可以将各种VRML结点存入数据库中，下面是源程序。注意：在服务器上，要将让PHP处理wrl格式的文档，否则后果将是没有任何虚拟现实。

<?php
header("Content-type: application/x-vrml");

$txt="#VRML V2.0 utf8 

DEF leftBox Transform 
{ 
	translation -5 0 0 
	children 
	[ 
		Shape 
		{ 
			appearance Appearance 
			{ 
				material Material 
				{ 
					diffuseColor 1 0 0 
				} 
			} 
			geometry Box{}
			DEF SphereChild Shape 
			{ 
				appearance Appearance 
				{ 
					material Material 
					{ 
						diffuseColor 1 0 1 
					} 
				} 
				geometry Sphere 
				{ 
				radius 1.2 
				} 
			}
		} 
	] 
} 

DEF rightBox Transform 
{ 
	translation 5 0 0 
	children 
	[ 
		Shape 
		{ 
			appearance Appearance 
			{ 
				material Material 
				{ 
				diffuseColor 0 0 1 
				} 
			} 
			geometry Box{} 
		} 
	] 
} 

DEF onoff Transform 
{ 
	translation 0 -1 0 
	children 
	[ 
		Shape 
		{ 
			appearance Appearance 
			{ 
				material Material 
				{ 
				diffuseColor 0 1 0 
				} 
			} 
			geometry Box{} 
		} 
		DEF TS TouchSensor{} 
	] 
} 

DEF S Script 
{ 
	eventIn SFBool isActive 
	eventOut MFNode child 
	field MFNode testNode USE SphereChild 
	url 
	'javascript: 
		function isActive(value) 
		{ 
			if (value) 
			{ 
				child=testNode; 
			} 
		} 
	'
} 

ROUTE TS.isActive TO S.isActive 
ROUTE S.child TO leftBox.removeChildren 
ROUTE S.child TO rightBox.addChildren";
echo $txt; 
?>