x3dom:12.三维实体基本元素：绘制点线面

此章节与第二节呼应 x3dom:2.鼠标互动事件（鼠标略过高亮；鼠标点击换色)

绘制点

绘制二维点 <Polypoint2D

<shape>
                    <appearance>
                      <material id="colorPolypoint" emissiveColor='yellow'></material>
                    </appearance>
                    <Polypoint2D id="testPolypoint" point ='0 0, 0.5 0.7, -0.5 -0.3, -0.3 0.2, 0.3 -0.3' "testPolypoint();"></Polypoint2D>
                  </shape>

绘制三维点？？？？

绘制线

<X3D >
<Scene>
		<Shape DEF="edg57">
			<Appearance><Material  emissiveColor="1 0 1" /></Appearance>
			<LineSet vertexCount='2'><Coordinate point='27.4085 63.2165 6 27.4085 63.2165 16 '/></LineSet>
		</Shape>
</Scene>
</X3D>

绘制面

• 曲面
  ？？？？

• 普通平面
  

<X3D >
	<Scene DEF='scene'>
        <NavigationInfo headlight="false" />
		<Transform DEF='Tube001' translation='0.000000 -0.500000 0.000000' scale='0.874985 1.000000 0.874985' >
			<Shape>
				<Appearance DEF='_02_-_Default' >
				<Material  diffuseColor="1 0 0" emissiveColor="1 0 1"  >
				</Material>
				</Appearance>
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