主题:  高手指点我一下！

HighSongS
职务：普通成员
等级：1
金币：0.0
发贴：5
#12003/3/6 1:04:50
最近正郁闷，拿VRML做点东西，却发现建立一个物体后，却无法用DEF、USE这类重用对象的方法实现与此物体轴对称的那个物体。哪位高手有没有什么体会能指点我一下，我先谢过了。



VRFans
职务：版主
等级：4
金币：10.0
发贴：1353
#22003/3/6 11:29:13
HighSongS在上个帖子中说
引用:
用DEF、USE这类重用对象的方法实现与此物体轴对称的那个物体。


此话何解？



HighSongS
职务：普通成员
等级：1
金币：0.0
发贴：5
#32003/3/7 3:38:02
比如说以下两个物体，明明是轴对称，外型完全一样，先建立了object01后却无法用DEF、USE这类重用对象的方法

建立object02，只能像下面那样建立两个独立的物体，真浪费资源。

#VRML V2.0 utf8


#object01

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rotation -0.1799 0.6956 0.6956 -3.498
scale 0.7692 0.7692 0.8807
scaleOrientation 0 0 -1 -0.4724
children [
Shape {
appearance Appearance {
material Material {
diffuseColor 0.8784 0.3373 0.3373
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ccw FALSE
solid TRUE
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scale 1.037 1.037 1.037
scaleOrientation -0.736 0.4037 0.5434 -0.612
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appearance Appearance {
material Material {
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ccw FALSE
solid TRUE
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#object02

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scaleOrientation 0 0 -1 -0.3505
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appearance Appearance {
material Material {
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}
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}
DEF gygyjqgdljf02 Transform {
translation -96.91 20.12 -26.7
rotation -0.9849 0.1356 -0.1077 -0.5441
scale 1.037 1.037 1.037
scaleOrientation -0.2244 0.6825 -0.6956 -1.017
children [
Shape {
appearance Appearance {
material Material {
diffuseColor 0.9922 0.949 0.8157
}
}
geometry DEF gygyjqgdljfl01-FACES IndexedFaceSet {
ccw TRUE
solid TRUE
coord DEF gygyjqgdljfl01-COORD Coordinate { point [
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1.649 0 2.857, 2.527 0 2.121, 3.1 0 1.128, 3.299 0.55 0,
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2.527 0.55 2.121, 3.1 0.55 1.128]
}
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}
}
]
}



HighSongS
职务：普通成员
等级：1
金币：0.0
发贴：5
#42003/3/7 3:43:04
难道要用javascript或Jave？



power600
职务：普通成员
等级：1
金币：0.0
发贴：6
#52003/3/8 10:08:35
这相似于3damax中的镜像功能，VRML并不支持，除非物体外形有一定的对称性。



HighSongS
职务：普通成员
等级：1
金币：0.0
发贴：5
#62003/3/9 0:40:12
VRML如何支持外形有对称性的物体？愿闻其祥。



power600
职务：普通成员
等级：1
金币：0.0
发贴：6
#72003/3/9 12:24:23
VRML不支持mirror，除非物体旋转180度后，与原来保持严格的对称。
如果简单如你的例子，倒可以用def use没有问题。
#VRML V2.0 utf8

Transform {
children    DEF gygyjqgd01_0 Transform {
children    Shape {
appearance    Appearance {
    material    Material {
     diffuseColor    0.8784 0.3373 0.3373
    }

}

geometry    DEF gygyjqgd01-FACES_1 IndexedFaceSet {
    coord    DEF gygyjqgd01-COORD Coordinate {
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Transform {
children    USE gygyjqgd01_0

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children    Shape {
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scaleOrientation    -0.581651 -0.141086 -0.80111 0.394906
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translation    0 -0.356054 -0.225182
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Transform {
children    USE gygyjqgdljf01_2

translation    -1.06868 -28.0336 -17.8333
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HighSongS
职务：普通成员
等级：1
金币：0.0
发贴：5
#82003/3/10 3:09:15
十分感谢楼上power600兄的耐心解答！
但运行上面的代码后仔细看看发觉两个物体已不是镜像物体了，有微小的区别。我郁闷的正是VRML只支持移动、旋转、缩放的语法，有些局限，看来真要用javascript或Jave了。