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Entity - entity handle Alpha# - alpha level of entity |
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Sets the entity alpha level of an entity. The alpha# value should be in a floating point value in the range 0-1. The default entity alpha setting is 1. 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. An dxEntityAlpha 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 dxHideEntity, which doesn't involve entities in dxCollisions. |
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; dxEntityAlpha Example ; ------------------- dxGraphics3D 640,480 dxSetBuffer dxBackBuffer() camera=dxCreateCamera() light=dxCreateLight() dxRotateEntity light,90,0,0 cube=dxCreateCube() Back=dxCreateCube() dxPositionEntity cube,0,0,5 dxPositionEntity back,0,0,15 dxScaleEntity Back,10,2,1 dxEntityColor back,255,0,0 ; Set initial entity dxColor values Alpha#=1 While Not dxKeyDown( 1 ) ; Change alpha value depending on key pressed If alpha#<0.01 Then alpha# = 0 If alpha#>1 Then alpha# = 1 If dxKeyDown( 2 )=True And Alpha#>0 Then Alpha#=Alpha#-0.01 If dxKeyDown( 3 )=True And alpha#<1 Then Alpha#=Alpha#+0.01 ; Set entity alpha value dxEntityAlpha cube,Alpha# dxTurnEntity cube,0.1,0.1,0.1 dxTurnEntity back,1,0,0 dxRenderWorld dxText 0,0,"Press keys 1-2 to change dxEntityAlpha" dxText 0,20,"Entity Alpha: "+Alpha dxFlip Wend End |