：以植物标本馆虚拟漫游系统的建造为例子，介绍了开发三维交互式虚拟漫游场景的
一套整体解决方案。阐述了用3ds max 建模与VRML 编程相结合来设计和开发虚拟植物标
本馆的具体过程。重点分析了实现虚拟漫游所用到的关键技术、系统优化应用的常用技巧以
及将VRML 文件嵌入到HTML 文件中的方法。依据这些技术和方法制作的基于Web 的植
物标本馆全景虚拟漫游系统具有碰撞检测机能，能让参观者虚拟漫游，有良好的交互功能。
本文最后指出了系统进一步完善的方向。
2023-01-12 11:07:21
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这是一个wrl文件可以用来学习vrml
#VRML V2.0 utf8
EXTERNPROTO BlaxxunZone [
eventIn MFNode addEvents
eventIn MFNode removeEvents
exposedField MFNode events
][ "shared.wrl#BlaxxunZone", "http://www.blaxxun.com/vrml/protos/shared.wrl#BlaxxunZone" ]
EXTERNPROTO SharedEvent [
exposedField SFString name # for accessing a special event
eventIn SFColor colorFromServer
eventOut SFColor colorToServer
eventIn SFColor set_color
eventOut SFColor color_changed
eventIn SFRotation rotationFromServer
eventOut SFRotation rotationToServer
eventIn SFRotation set_rotation
eventOut SFRotation rotation_changed
eventOut SFString string_changed
eventIn SFString stringFromServer
] [ "shared.wrl#SharedEvent", "http://www.blaxxun.com/vrml/protos/shared.wrl#SharedEvent" ]
DEF SharedZone BlaxxunZone {
events [
DEF SharedColor SharedEvent { name "newColor" }
DEF SharedRotation SharedEvent { name "newRotation" }
]
}
DEF BoxSwitch Switch {
whichChoice 0
choice [
DEF BoxRotation Transform {
children [
Shape { # 红色立方体
appearance Appearance { material DEF BoxColor Material { diffuseColor 1 0 0 } }
geometry Box { }
}
]
}
]
}
# 此球体用来更换颜色
Transform {
translation -4 0 0
children [
Shape {
appearance Appearance { material Material { diffuseColor 0 0 1 } }
geometry Sphere {}
},
DEF ColorSensor TouchSensor {},
DEF ColorScript Script {
eventIn SFTime clicked
eventIn SFString changeColor
eventOut SFColor color_changed
eventOut SFColor color_changed_from_bot
url "vrmlscript:
function clicked (value, time) {
color_changed = new SFColor(Math.random(),Math.random(),Math.random());
}
function changeColor (value, time) {
tempColor = new SFColor(1,0,0);
temp = new SFString(value);
pos1 = 7;
for (i=0; i<3;i++){
temp2 = new SFString(temp.substring(pos1,pos1+1));
if (temp2 == '1')
tempColor[i] = 1;
pos2 = temp.indexOf(' ',pos1);
pos1 = pos2+1;
}
color_changed_from_bot = tempColor;
}
"
}
]
}
# 此锥体用来旋转更换
Transform {
translation 4 0 0
children [
Shape {
appearance Appearance { material Material { diffuseColor 0 0 1 } }
geometry Cone {}
},
DEF RotSensor TouchSensor {},
DEF RotationScript Script {
field MFString newurl [ "OnEvent( par1, par2 )" ]
# field MFString newurl [ "javascript:OnJSEvent( )" ]
field MFString param [ "" "" ]
eventIn SFTime clicked
eventIn SFTime set_string
eventOut SFRotation rotation_changed
url "vrmlscript:
function clicked (value, time) {
angle = Math.random()*6.283;
rotation_changed = new SFRotation(0,1,0,angle);
}
function set_string (value, time) {
newurl[0] = 'OnEvent ( ' + 'your par1 ' + ',' + 'your par2' + ')';
Browser.loadURL (newurl,param);
}
"
}
]
}
Transform {
translation 0 -3 0
children [
DEF ChangeString Text { string "ChangeString" }
]
}
Script
{
url "vrmlscript:
function initialize() {
}"
}
#ROUTE RotSensor.touchTime TO RotationScript.clicked
ROUTE RotSensor.touchTime TO RotationScript.set_string
#ROUTE RotationScript.rotation_changed TO SharedRotation.set_rotation
ROUTE RotationScript.rotation_changed TO BoxRotation.set_rotation
ROUTE SharedRotation.rotation_changed TO BoxRotation.rotation
ROUTE ColorSensor.touchTime TO ColorScript.clicked
ROUTE ColorScript.color_changed TO SharedColor.set_color
ROUTE SharedColor.color_changed TO BoxColor.diffuseColor
ROUTE ColorScript.color_changed_from_bot TO BoxColor.diffuseColor
ROUTE SharedColor.string_changed TO ColorScript.changeColor
2022-10-29 11:39:57
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