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- <title>Blitz3D Docs</title>
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- <h1>ModifyTerrain terrain,grid_x,grid_z,height#[,realtime]</h1>
- <h1>Parameters</h1>
- <table>
- <tr>
- <td>
- terrain - terrain handle
<br />
- grid_x - grid x coordinate of terrain
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- grid_y - grid y coordinate of terrain
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- height# - height of point on terrain. Should be in the range 0-1.
<br />
- realtime (optional) - True to modify terrain immediately. False to modify terrain when RenderWorld in next called. Defaults to False.
- </td>
- </tr>
- </table>
- <h1>Description</h1>
- <table>
- <tr>
- <td>
- Sets the height of a point on a terrain.
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- </tr>
- </table>
- <h1><a href=../3d_examples/ModifyTerrain.bb>Example</a></h1>
- <table>
- <tr>
- <td>
- ; ModifyTerrain Example
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- ; ---------------------
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-
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- Graphics3D 640,480
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- SetBuffer BackBuffer()
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-
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- terra_size=32 ; initial size of terrain, and no. of grids segments, along each side
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- x_scale=10 ; x scale of terrain
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- y_scale=50 ; y scale of terrain
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- z_scale=10 ; z scale of terrain
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- marker_x=terra_size/2 ; initial x position of marker
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- marker_z=terra_size/2 ; initial z position of marker
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-
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- camera=CreateCamera()
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- PositionEntity camera,(terra_size*x_scale)/2,50,0 ; position wherever; just try and get good view of terrain!
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- RotateEntity camera,30,0,0 ; again, try and get good view of terrain
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-
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- light=CreateLight()
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- RotateEntity light,90,0,0
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-
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- ; Create terrain
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- terra=CreateTerrain(terra_size)
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- ScaleEntity terra,x_scale,y_scale,z_scale
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-
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- ; Texture terrain
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- grass_tex=LoadTexture("media/mossyground.bmp")
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- EntityTexture terra,grass_tex
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-
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- ; Create marker
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- marker=CreateSphere()
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- ScaleEntity marker,1,1,1
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- EntityColor marker,255,0,0
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-
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- While Not KeyDown(1)
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-
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- ; Change marker position values depending on cursor key pressed
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- If KeyHit(205)=True Then marker_x=marker_x+1
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- If KeyHit(203)=True Then marker_x=marker_x-1
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- If KeyHit(208)=True Then marker_z=marker_z-1
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- If KeyHit(200)=True Then marker_z=marker_z+1
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-
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- ; Get terrain height at marker position
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- marker_y#=TerrainHeight(terra,marker_x,marker_z)
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-
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- ; If A pressed then increase marker_y value and modify terrain
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- If KeyDown(30)=True
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- If marker_y#<1 Then marker_y#=marker_y#+0.005
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- ModifyTerrain terra,marker_x,marker_z,marker_y#
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- EndIf
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-
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- ; If Z pressed then decrease marker_y value and modify terrain
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- If KeyDown(44)=True
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- If marker_y#>0 Then marker_y#=marker_y#-0.005
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- ModifyTerrain terra,marker_x,marker_z,marker_y#
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- EndIf
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-
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- ; Position marker, taking into account x, y and z scales of terrain
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- PositionEntity marker,marker_x*x_scale,marker_y#*y_scale,marker_z*z_scale
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-
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- RenderWorld
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-
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- Text 0,0,"Use cursor keys to move marker over the terrain"
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- Text 0,20,"Press A or Z to alter height of terrain at marker's position"
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- Text 0,40,"Terrain Height: "+marker_y#
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-
<br />
- Flip
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-
<br />
- Wend
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-
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- End
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- </tr>
- </table>
- <br>
- <a target=_top href=../index.htm>Index</a><br>
- <br>
- Click <a href=http://www.blitzbasic.co.nz/b3ddocs/command.php?name=ModifyTerrain&ref=comments target=_blank>here</a> to view the latest version of this page online</body>
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