Unity3d-地形制作教程 - 图文(2)

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Note:When you have a brush selected, move your mouse over the Terrain in the Scene View and press F. This will center the Scene View over the mouse pointer position and automatically zoom in to the Brush Size distance. This is the quickest & easiest way to navigate around your Terrain while creating it.

Paint Height

The second tool from the left is the Paint Height tool

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第二个工具,最大高度工具. 可以设定最大高度,当达到这个高度后,地形就不再加高.周围高度一样时,就会变平.这个工具用于分出地形高度的层次.Shift键在这个工具上的用途是选取最大高度.

This tool allows you to specify a target height, and move any part of the terrain toward that height. Once the terrain reaches the target height, it will stop moving and rest at that height.

To specify the target height, hold Shift and click on the terrain at the height you desire. You can also manually adjust the Height slider in the Inspector.

Now you've specified the target height, and any clicks you make on the terrain will move the terrain up or down to reach that height. 下图所示,最大高度工具的应用.

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Smoothing Height

The third tool from the left is the Smoothing Height tool

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第三个工具是高度平滑工具.用于再个不高度地形之间的过渡部分.这样地形不会有棱有角.如下图所示.

This tool allows you to soften any height differences within the area you're painting. Like the other brushes, paint the areas you want to smooth in the Scene View.

Working with Heightmaps 高度图创建地形

If you like, you can import a greyscale Heightmap created in Photoshop, or from real-world geography data and apply it to your Terrain. To do this, choose Terrain->Import Heightmap - Raw..., then select

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the desired RAW file. You'll then see some import settings. These will be set for you, but you have the option of changing the size of your Terrain from this dialog if you like. When you're ready, click the Import button. Once the Heightmap has been applied to the Terrain, you can edit it normally with all the Tools described above. Note that the Unity Heightmap importer can only import grayscale raw files. Thus you can't create a raw heightmap using RGB channels, you must use grayscale.

用Photoshop或其他3D软件导出灰度图 可以使用灰度图来创建地形.灰度图的格式应为RAW格式.点击, Terrain->Import Heightmap – Raw 出现对话框,可以修改地形的大小.点击Import就可以创建地形了.创建好后,你可以使用所有的地形工具再进行编辑. Unity可以支持16位的灰度图.可以通过Photoshop,Bryce,Terragen这几个软件来创建灰度图.同样,可以在Unity中导出灰度图. 在

Terrain->Import Heightmap - Raw...对话框中,点击Export.就OK. 通过Terrain->Flatten....命令可以将地形整体设置一个高度.这个命令最好在最初使用.不然,做好的地形会变成平面.需要重新编辑.

Unity works with RAW files which make use of full 16-bit resolution. Any other heightmap editing application like Bryce, Terragen, or Photoshop can work with a Unity Heightmap at full resolution.

You also have the option of exporting your Heightmap to RAW format. Choose Terrain->Import Heightmap - Raw... and you'll see a export settings dialog. Make any changes you like, and click Export to save your new Heightmap.

Unity also provides an easy way to flatten your terrain. Choose Terrain->Flatten.... This lets you flatten your terrain to a height you specify in the wizard.

Textures 给地形加贴图

Decorate the landscape of your terrain by tiling Terrain Textures across the entire terrain. You can blend and combine Terrain Textures to make smooth transitions from one map to another, or to keep the surroundings varied. 地形贴图就如角色贴图一样,是地形整体风貌.出于游戏整体性能和地形引擎数据结构的原因.地形的贴图数最好是4的倍数.

Terrain Textures are also called splat maps. What this means is you can define several repeating high resolution textures and blend between them arbitrarily, using alpha maps which you paint directly onto the Terrain. Because the textures are not large compared to the size of the terrain, the distribution size of the Textures is very small.

Note: Using an amount of textures in a multiple of four provides the greatest benefit for performance and storage of the Terrain alpha maps.

To being working with textures, click on the Paint Textures button下图所示就是贴图画笔

in the Inspector.

Adding a Terrain Texture为地形增加贴图

Before you can begin painting Terrain Textures, you will add at least one to the Terrain from your Project folder. Click the Options Button->Add Texture.... 如图所示, Options Button->Add Texture....你需要为地形增加贴图,才能用贴图来画地形.第一个地形会作用于整个地形.第二个之后的贴图才能用笔刷画.重复以上步骤就可以为地形增加需要的贴图了.如果要更换贴图,就在当前贴图选取后(被选取的贴图会以高亮蓝

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色表示),点击Edit Texture,之后就可以重新选取贴图.另一个Remove Texture 就是移除贴图.贴图尺寸越小,过渡会越自然.反之亦然.

This will bring up the Add Terrain Texture dialog.

The Add Terrain Texture dialog 在Splat 中选取需要的贴图文件.第二三个参数是贴图的尺寸大小. From here, select a tileable texture in the Splat property. You can either drag a texture to the property from the Project View, or choose one from the drop-down.

Now, set the Tile Size X and Tile Size Y properties. The larger the number, the larger each \texture will be scaled. Textures with large Tile Sizes will be repeated fewer times across the entire Terrain. Smaller numbers will repeat the texture more often with smaller tiles.

Click the Add Button and you'll see your first Terrain Texture tile across the entire Terrain.

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Repeat this process for as many Terrain Textures as you like.

Painting Terrain Textures 画地形贴图

Once you've added at least two Terrain Textures, you can blend them together in various ways. This part gets really fun, so let's jump right to the good stuff. 为地形增加了两个或以上贴图后,就可以使用贴图画地形了.选取贴图和笔刷,用鼠标在地形上拖拽,画贴图就是如此简单.画贴图时记得使用F和Alt键,这样的效率会更高.

Select the Terrain Texture you want to use. The currently selected Terrain Texture will be highlighted in blue.

Select the Brush you want to use. The currently selected Brush will be highlighted in blue.

Select the Brush Size, Opacity, and Target Strength.

Click and drag on the terrain to draw the Terrain Texture.上图从上而下参数为:笔刷大小,透明度,笔刷强度

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