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- <title>Blitz3D Docs</title>
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- <h1>CreateTerrain ( grid_size[,parent] )</h1>
- <h1>Parameters</h1>
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- grid_size - no of grid squares along each side of terrain, and must be a power of 2 value, e.g. 32, 64, 128, 256, 512, 1024.
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- parent (optional) - parent entity of terrain
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- <h1>Description</h1>
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- Creates a terrain entity and returns its handle.
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- The terrain extends from 0,0,0 to grid_size,1,grid_size.
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- A terrain is a special type of polygon object that uses real-time level of detail (LOD) to display landscapes which should theoretically consist of over a million polygons with only a few thousand. The way it does this is by constantly rearranging a certain amount of polygons to display high levels of detail close to the viewer and low levels further away.
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-
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- This constant rearrangement of polygons is occasionally noticeable however, and is a well-known side-effect of all LOD landscapes. This 'pop-in' effect can be reduced in lots of ways though, as the other terrain help files will go on to explain.
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- The optional parent parameter allows you to specify a parent entity for the terrain so that when the parent is moved the child terrain will move with it. However, this relationship is one way; applying movement commands to the child will not affect the parent.
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- Specifying a parent entity will still result in the terrain being created at position 0,0,0 rather than at the parent entity's position.
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- See also: LoadTerrain.
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- <h1><a href=../3d_examples/CreateTerrain.bb>Example</a></h1>
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- ; CreateTerrain Example
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- ; ---------------------
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- Graphics3D 640,480
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- SetBuffer BackBuffer()
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- camera=CreateCamera()
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- PositionEntity camera,0,1,0
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- light=CreateLight()
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- RotateEntity light,90,0,0
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- ; Create terrain
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- terrain=CreateTerrain(128)
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- ; Texture terrain
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- grass_tex=LoadTexture( "media/mossyground.bmp" )
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- EntityTexture terrain,grass_tex
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- While Not KeyDown( 1 )
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- If KeyDown( 205 )=True Then TurnEntity camera,0,-1,0
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- If KeyDown( 203 )=True Then TurnEntity camera,0,1,0
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- If KeyDown( 208 )=True Then MoveEntity camera,0,0,-0.05
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- If KeyDown( 200 )=True Then MoveEntity camera,0,0,0.05
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- RenderWorld
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- Text 0,0,"Use cursor keys to move about the terrain"
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- Flip
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- Wend
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- End
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- <a target=_top href=../index.htm>Index</a><br>
- <br>
- Click <a href=http://www.blitzbasic.co.nz/b3ddocs/command.php?name=CreateTerrain&ref=comments target=_blank>here</a> to view the latest version of this page online</body>
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