### 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;
?>