X3D:从VRML转换的PROTO不起作用

时间:2017-10-09 09:35:56

标签: x3d vrml

我有一个想要转换为X3D的VRML代码。代码应定义具有不同半径和颜色的球体,以便稍后通过将坐标作为参数进行实例化。

首先,我使用online converter中建议的another question,然后在搅拌机中打开它来检查它,但它只显示一个球体而不是它应该的4个球体。我将它与谷歌搜索发现的其他类似例子进行了比较,我没有看到为什么会这样做有任何区别或线索。我尝试更改某些字段,使其看起来更像是示例:field accessTypeinitializeOnly<X3D ...>profile="Interchange" version="3.2" xmlns:xsd="http://www.w3.org/2001/XMLSchema-instance" xsd:noNamespaceSchemaLocation="http://www.web3d.org/specifications/x3d-3.2.xsd"内的信息。我也尝试将<Shape>置于<children>内部,就像在VRML中一样,但在所有情况下它只显示一个球体。

这是我要转换为x3d的VRML代码的简化版本:

#VRML 2.0 utf8
PROTO Copper [ exposedField SFVec3f xyz 0 0 0 ] {
  Transform {
    translation IS xyz
    children [
      Shape {
        appearance Appearance {
          material Material { diffuseColor 0.78 0.5 0.2 }
        }
        geometry Sphere { radius 1.32 }
      }
    ]
  }
}
Copper { xyz 0.0 0.0 0.0 } # 0
Copper { xyz 0.0 1.8 1.8 } # 1
Copper { xyz 1.8 0.0 1.8 } # 2
Copper { xyz 1.8 1.8 0.0 } # 3

这是我从转换器得到的:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE X3D PUBLIC "ISO//Web3D//DTD X3D 3.0//EN" "http://www.web3d.org/specifications/x3d-3.0.dtd">
<X3D xmlns:xsd='http://www.w3.org/2001/XMLSchema-instance' profile='Full' version='3.0' xsd:noNamespaceSchemaLocation='http://www.web3d.org/specifications/x3d-3.0.xsd'>
  <Scene DEF='scene'>
    <ProtoDeclare name='Copper'>
      <ProtoInterface>
        <field accessType='inputOutput' name='xyz' type='SFVec3f' value='0 0 0'/>
          </ProtoInterface>
          <ProtoBody>
        <Transform>
          <Shape>
            <Appearance>
              <Material diffuseColor='0.78 0.5 0.2'/>
            </Appearance>
            <Sphere radius='1.32'/>
          </Shape>
          <IS>
            <connect nodeField='translation' protoField='xyz'/>
          </IS>
        </Transform>
      </ProtoBody>
    </ProtoDeclare>
    <Copper xyz='0.0 0.0 0.0'/>
    <Copper xyz='0.0 1.8 1.8'/>
    <Copper xyz='1.8 0.0 1.8'/>
    <Copper xyz='1.8 1.8 0.0'/>
  </Scene>
</X3D>

1 个答案:

答案 0 :(得分:0)

不幸的是,它看起来像是Blender X3D导入器中的一个错误,因为以下在BS Contact查看器中显示了四个球体(如预期的那样),但Blender中只有一个球体:

<?xml version="1.0" encoding="UTF-8"?>
<X3D profile="Immersive" version="3.0">
    <Scene>
        <ProtoDeclare name="Copper">
            <ProtoInterface>
                <field accessType="inputOutput" name="xyz" type="SFVec3f"/>
            </ProtoInterface>
            <ProtoBody>
                <Transform translation='0 0 0'>
                    <Shape>
                        <Appearance>
                            <Material diffuseColor='0.78 0.5 0.2'/>
                        </Appearance>
                        <Sphere radius='1.32' />
                    </Shape>
                    <IS>
                        <connect nodeField="translation" protoField="xyz"/>
                    </IS>
                </Transform>
            </ProtoBody>
        </ProtoDeclare>
        <Copper />
        <Copper xyz='0 1.8 1.8' />
        <Copper xyz='1.8 0 1.8' />
        <Copper xyz='1.8 1.8 0' />
    </Scene>
</X3D>