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- <title>Blitz3D Docs</title>
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- <h1>EntityAlpha entity,alpha#</h1>
- <h1>Parameters</h1>
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- <td>
- Entity - entity handle
<br />
- Alpha# - alpha level of entity
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- <h1>Description</h1>
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- <td>
- Sets the entity alpha level of an entity.
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-
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- The alpha# value should be in a floating point value in the range 0-1. The default entity alpha setting is 1.
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-
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- The alpha level is how transparent an entity is. A value of 1 will mean the entity is opaque. A value of 0 will mean the entity is completely transparent, i.e. invisible. Values between 0 and 1 will cause varying amount of transparency. This is useful for imitating the look of objects such as glass and other translucent materials.
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-
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- An EntityAlpha value of 0 is especially useful as Blitz3D will not render entities with such a value, but will still involve the entities in collision tests. This is unlike HideEntity, which doesn't involve entities in collisions.
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- <h1><a href=../3d_examples/EntityAlpha.bb>Example</a></h1>
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- ; EntityAlpha 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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- camera=CreateCamera()
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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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- cube=CreateCube()
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- Back=CreateCube()
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-
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- PositionEntity cube,0,0,5
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- PositionEntity back,0,0,15
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- ScaleEntity Back,10,2,1
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- EntityColor back,255,0,0
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- ; Set initial entity color values
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- Alpha#=1
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-
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- While Not KeyDown( 1 )
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-
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- ; Change alpha value depending on key pressed
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- If alpha#<0.01 Then alpha# = 0
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- If alpha#>1 Then alpha# = 1
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- If KeyDown( 2 )=True And Alpha#>0 Then Alpha#=Alpha#-0.01
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- If KeyDown( 3 )=True And alpha#<1 Then Alpha#=Alpha#+0.01
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- ; Set entity alpha value
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- EntityAlpha cube,Alpha#
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- TurnEntity cube,0.1,0.1,0.1
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- TurnEntity back,1,0,0
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- RenderWorld
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- Text 0,0,"Press keys 1-2 to change EntityAlpha"
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- Text 0,20,"Entity Alpha: "+Alpha
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-
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- Flip
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- Wend
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- End
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- </table>
- <br>
- <a target=_top href=../index.htm>Index</a><br>
- <br>
- Click <a href=http://www.blitzbasic.co.nz/b3ddocs/command.php?name=EntityAlpha&ref=comments target=_blank>here</a> to view the latest version of this page online</body>
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