Irrlicht Engine

If you're vaguely familiar with writing shaders...

Yep. No problem.

By "pre-multiplied" alpha you mean setting the alpha in the diffuse color and it gets multiplied with the texture alpha so you can fade things in and out?

I mean the rgb*alpha calculation is "premultiplied" in the texture (e ...

Wow, that's much quicker than I expected!

And it works -- almost ;-). Actually I oversimplified and didn't tell you that I'm actually using pre-multiplied alpha. Specifically...


psnode->setMaterialType(irr::video::EMT_ONETEXTURE_BLEND);
psnode->getMaterial(0).MaterialTypeParam = irr::video ...

Thanks for your reply BlindSide. Your timing is perfect -- I'd just finished trying all of the things you suggest, and was stuck, having just failed to get the depth buffer to stay valid, like this...


... in EffectHandler::update(), about to do light modulation ...

driver->setRenderTarget ...

What is the best way to use particles with XEffects? I have some explosion particles using additive blending and they're getting shadowed. In fact they get dimmed when they're in front of any darkened area and not just in shadow. You can see this effect on the animated sphere in XEffects Example2 ...

I'm wondering if it would be possible for me to hack my copy of Irrlicht to make it right-handed.

Other tools and libraries that I'm using are right-handed, and RH + Z-up makes more sense for my application. Having to switch my brain between systems is becoming tiresome.

So, how far-reaching is ...

In case others find it useful, here's what I came up with. It uses boost::iterator_facade to take care of the boilerplate and provide a fully standard-compliant iterator.

Firstly it needs the following patch to irrList.h to make the dereference operators const. (This is against the 1.5 release ...

Well, I'm not sure about "easily" but yes, that's probably what I'll do. I just wanted to save myself the trouble if somebody else has done it already.

Is there an iterator hidden somewhere that traverses the whole scene graph? I'd like to use some of the standard C++ algorithms and maybe BOOST_FOREACH on it. For example: