华北水利水电学院虚拟现实技术实验报告2014～2015学年第一学期13 级计算机科学与技术专业班级：学号：姓名：
实验三虚拟现实复杂场景建模与漫游仿真
一、实验目的：
掌握虚拟现实技术复杂三维场景建模技术。在场景中引入环境背景、动画与交互等，构建逼真的三维场景。
二、试验要求：
本次试验为综合性质试验，要求自行设计一个较为复杂的场景或者单体模型，其中包含各种造型与渲染技术，比如纹理材质、光照、环境背景、声音视频、动画与交互等。场景内容不限。
三、试验步骤：
主要代码如下：
NavigationInfo {
type [ "EXAMINE", "ANY" ]
headlight TRUE
}
DEF vp1 Viewpoint { #set the viewpoint
position 2 0 11
}
Transform {
translation 3 -2.5 -2
rotation 0 0 1 1.57
children [Transform {rotation 0 -1 0 0.33
children [
Shape {
appearance Appearance {
material Material { }
texture ImageTexture { url "wood.jpg" }
}
geometry Box {size 0.1 30 17}
}
]}]
}
Transform #weight scale
{
translation -2 0 0
children [
Transform
{ rotation 1 0 -1 1.571
children [
Shape {
appearance Appearance {
material Material {diffuseColor 0.9 0.1 0.4
specularColor .18 .25 .23
ambientIntensity .0433
shininess .06 }
} #end Appearance
geometry Cylinder {radius 0.9 height 0.3 }
} #end dial base
DEF weight TouchSensor {}
Transform { #dial face (white)
translation 0 0.21 0
children [
Shape {
appearance Appearance {
material Material { diffuseColor 1 1 1}
}
geometry Cylinder {radius 0.8 height 0.05}
}
]
}
Transform { # scale
children [
DEF scale Transform {
translation 0 0.22 -0.6
rotation 1 0 0 1.571
children
[
Shape {
appearance Appearance {
material Material {diffuseColor 0.9 0.1 0.4}
texture ImageTexture {}
}
geometry Cone {bottomRadius 0.1 height 0.1}
}
]
}
]
}
Transform {
rotation 0 1 0 0.5236
children [USE scale ]
}
Transform {
rotation 0 1 0 1.0472
children [USE scale ]
}
Transform {
rotation 0 1 0 1.5708
children [USE scale ] }
Transform {
rotation 0 1 0 2.0944
children [USE scale ] }
Transform {
rotation 0 1 0 2.6180
children [USE scale ] }
Transform {
rotation 0 1 0 3.1416
children [USE scale ] }
Transform {
rotation 0 1 0 3.6652
children [USE scale ] }
Transform {
rotation 0 1 0 4.1888
children [USE scale ] }
Transform {
rotation 0 1 0 4.7124
children [USE scale ] }
Transform {
rotation 0 1 0 5.2360
children [USE scale ] }
Transform {
rotation 0 1 0 5.7596
children [USE scale ] }
Transform #weight scale needle
{
children [
DEF index Transform {
translation -0.1 0.5 0.1
rotation 0 1 0 0.9
scale 0.85 1 0.85
children [
Shape {
appearance Appearance {
material Material {diffuseColor 1 0.1 0.1}
}
geometry IndexedFaceSet {
coord Coordinate {
point [
0.07 0 0,
#0.03 0 -1,
-0.03 0 -0.7,
-0.07 0 0,
]
}
coordIndex [0,1,2,-1]
}
}
]
}
]
}
]}
Transform {
translation 0 -1.6 0
children [Shape {
appearance Appearance {
material Material { diffuseColor 0.9 0.1 0.4}
}
geometry Cylinder {radius 0.08 height 3}
}]
}
Transform #weight scale base
{
translation 0.8 -3 0.2
rotation 1 -1 0 0.571
children [
Shape {
appearance Appearance {
material Material {diffuseColor 0.9 0.1 0.4}
}
geometry Box {size 2 0.2 1}
}
]
}
]
}
DEF doll T
DEF Timer4 TimeSensor{ #eyesight tabel-needle TimeSensor
enabled FALSE
startTime 0.0 ransform {
translation 3 -2.7 0.76
#rotation 1 0 0 1.5
#scale 1 1 1
children [
DEF movedoll PlaneSensor { minPosition -5 -2.5 #set PlaneSensor movedoll with maxPosition
maxPosition 8 -0.5
}
Shape {
appearance Appearance {
texture ImageTexture { url "pangpang.gif" }
material Material {
diffuseColor 1 .85 0
specularColor .87 .25 .25
ambientIntensity .157
shininess 1
#transparency .737
}
}
geometry Sphere {radius 0.6}
}
]
}
Transform {
translation 8 -1 0
rotation 1 1 0 0.5
children [
Shape {appearance Appearance {
material Material {diffuseColor 1 1 1 }
texture ImageTexture { url " shili.jpg" }
}
geometry Box {size 0.1 4 1}
}
DEF image TouchSensor {}
]
}
DEF Timer TimeSensor{ enabled FALSE
startTime 0.0
cycleInterval 10.0
loop TRUE
}
DEF Timer2 TimeSensor{ enabled FALSE
startTime 0.0
cycleInterval 10.0
loop TRUE
}
DEF Timer3 TimeSensor{ enabled FALSE
startTime 0.0
cycleInterval 10.0
loop TRUE
}
cycleInterval 10.0
loop TRUE
}
DEF PI PositionInterpolator {
key [ 0 ]
keyValue[-1 -2.3 0.76 ]
}
DEF OI OrientationInterpolator {
key [0 ]
keyValue[1 1 0 0.5 ]
}
DEF OI2 OrientationInterpolator { key [0 ]
keyValue[0 1 0 0.9 ]
}
DEF PI2 PositionInterpolator
{
key [0]
keyValue[6.2 -0.7 0 ]
}
ROUTE weight.isActive TO Timer.set_enabled
ROUTE Timer.fraction_changed TO PI.set_fraction
ROUTE PI.value_changed TO doll.set_translation
ROUTE weight.isActive TO Timer2.set_enabled
ROUTE Timer2.fraction_changed TO OI.set_fraction
ROUTE OI.value_changed TO index.set_rotation
ROUTE image.isActive TO Timer3.set_enabled
ROUTE Timer3.fraction_changed TO PI2.set_fraction
ROUTE PI2.value_changed TO doll.set_translation
ROUTE image.isActive TO Timer4.set_enabled
ROUTE Timer4.fraction_changed TO OI2.set_fraction
ROUTE OI2.value_changed TO index.set_rotation
ROUTE movedoll.translation_changed TO doll.set_translation
四、试验结果：
五、小结（包括收获、心得体会、存在的问题及解决问题的方法、建议等）
这次试验我做了一个简单的儿童篮球场模型。首先把篮球，计时篮球架，挡板，地板等一一做好，最终将他们组合起来，其中最难的是小球运动。空间坐标的平移是通过对Transform节点的translation域的域值的设定，建立新的坐标原点，作为children域中所有子节点创建造型的定位点，从而实现原始坐标系和新坐标系造型之间相对位置的移动和变化的，这一点我感触颇深。