anchor.diff:  
   === 无缝拼接纹理
   
  -image::http://jmonkeyengine.googlecode.com/svn/trunk/engine/test-data/Textures/Terrain/BrickWall/BrickWall.jpg[BrickWall.jpg,with="128",height="128",align="right"]
  +image::http://bbs.jmecn.net/uploads/default/original/1X/863786d6524c7c970971bf6a8d6a574469021018.jpg[BrickWall.jpg,with="128",height="128",align="right"]
   
   拼接纹理(Tiles)是一种简单常用的纹理类型。为一大片区域(如墙壁、地板)构造纹理的时候，不需要做大幅的纹理图片，而是做一小片纹理然后不断拼接直到填满整个区域。
   
  
positive.code: 
  == 数学
  
  image::http://wiki.jmonkeyengine.org/jme3/intermediate/coordinate-system.png[coordinate-system.png,with="235",height="210",align="right"]
  
  === 坐标
  
  
negative.code: * 用法线贴图(Normal Map)为细微之处塑模，比如墙壁裂纹、锈迹、皮肤纹理，或者帆布的编织纹理。(link:http://en.wikipedia.org/wiki/bump_mapping[更多关于凸凹贴图])
  * 用高度图(Height Map)为打过莫地形塑模，包括深谷和山脉。
  
  image::http://bbs.jmecn.net/uploads/default/original/1X/ecd306264b3ab11304a4eda8f2a3b858636bf49b.png[mountains512.png,with="128",height="128",align="right"]
  
  ===== 高度图
  
  