Creating Shape with Opacity Gradient

[siderealxxx]

Hi, 

I'm stuck getting this to work... I have a triangle shape which I need to fade out exactly 50% across, so it is solid for the first half, then the second half fades out to nothing. I have my shape, apply a layer mask and use the gradient tool but it's not giving the right result. Bit of a novice but I can find my way around...

Thanks! 

[c.pfaffenbichler]

Try 

Layer > New Shape Layer > Gradient 

and set the Transparency stops accordingly. 

Edit: 

[siderealxxx]

Thanks, I got there in the end!