How to make the billboard disappear gradually?

[charlie]

I want to make a Counting down animation---3 2 1 go! (just like the animation at the beginning of the racing game)

So I created a billboard and tied it at the front of the camera,zhen add a texture animator (3 2 1 go) to the bill board ;

But I don't know how to make the billboard disppear gradually(decrease its alpha smoothly)

need your help

[charlie]

simply
How to change the transparence of the billboard little by little?

[Strong99]

something like this:
billboard->setMaterialFlag(EMF_TRANSPARENT_ALPHA_COLOR)

like the other scenenodes
and than you can give a TRANSPARANT parameter some where between 0 and 255

[charlie]

but how can I change the Transparent value of the texture by my programme Dynamicly?

I can't find the parameter.
I am sorry

[Luben]

from SMaterial.h

Code: Select all

		//! Free parameter dependend on the material type.
		/** Mostly ignored, used for example in EMT_PARALLAX_MAP_SOLID
		and EMT_TRANSPARENT_ALPHA_CHANNEL. */
		f32 MaterialTypeParam;

So set the material.MaterialTypeParam to change transparency.