Fade in/out of transparent Rooftops

[Enker]

I'm looking to have the rooftops of building fade out as they character enters them on a map, with the character and the rooftop as active objects.

In this manner, currently the 'Character' overlapping the 'Rooftop' sets it to invisible whilst them not overlapping sets it visible. Which works fine.

I'm hoping to have a better fade out effect though, and ideally want the Character overlapping the rooftop to cause it to gain transparency every 0.5 seconds until it's gone, then loose transparency every 0.5 seconds when they aren't touching - which would provide a smooth fading effect.

However I can't add or subtract from the value, instead only being able to Set the Alpha-Blending Coefficient.

Does anyone know a way to do this?

[Janette5]

You set the alpha-blending co-efficient to 0 or 255 when the player overlaps. Then add 1 or subtract 1 until it reaches the other end i.e. fades out / fades in.

For example:
Player overlaps roof
+ Global Value Roof = 0
--- Set Global Value Roof = 1
--- Set Alpha-Blending co-efficient of roof to 255

Global Value Roof = 1
--- Set alpha blending co-efficient of roof = current value - 1

Alpha-Blending co-efficient of roof = 0
Global Value Roof = 1
--- Set Global Value Roof = 2

Then if the player overlaps with the global value roof = 2 - reverse the process and set the global value roof back to zero at the end of it.