Another WIP using G3D9

[EdwardP]

Got an implementation of the 3D radar like the one implemented in the original Elite working this evening. It was really pretty straightforward thanks to G3D::CoordinateFrame doing all the hard work for me!

Thought some might be interested: http://www.youtube.com/watch?v=L9O8RUk4CLk

Cheers

E

[Morgan McGuire]

Nice. I like the radar and the lighting.

-m

Prof. Morgan McGuire
Computer Science Department
Williams College
http://cs.williams.edu/~morgan

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[EdwardP]

Thanks Morgan, the lighting is currently just the default one I've set up for the base GameScreen class, but it is based on this article from the lead XNA developer:

http://blogs.msdn.com/b/shawnhar/archive/2007/04/09/the-standard-lighting-rig.aspx

If others are interested, the code is:

void GameScreen::CreateDefaultLighting(int brightness_factor)

{

   // Key light

   m_lighting->lightArray.append(Light::directional("key", Vector3(1.5, 2, 1), Color3::fromARGB(0xFFB2D1DC) * (float)brightness_factor, false));

   // Fill light

   m_lighting->lightArray.append(Light::directional("fill", Vector3(-1.5, -2, 1), Color3::fromARGB(0xFFe0cc9b) * (float)brightness_factor, false));

   // Back light

   m_lighting->lightArray.append(Light::directional("back", Vector3(0, -0.5, -1), Color3::fromARGB(0xFFB2D1DC) * (float)brightness_factor, false));

}

you'll notice that I have added a 'brightness_factor' to multiply-up the colour values. I found I need to do this in pretty much all cases to get the models lit adequately - is this something you'd expect, or is it (as I suspect) a problem with my model material definitions? The thing is that my models have come from a variety of sources and I would be surprised if they were all wrong?

E

[Morgan McGuire]

G3D's lighting model is physically based, so there's no reason to
think that "1 W/m^2" is a good value to avoid saturating or
underexposing the image. I think that it happens to work out so that
is actually a reasonable value, but I'm not sure. It might just be
that your textures are too dark or that you don't have a bright enough
environment map.

I've switch to almost always using spot lights instead of directional
lights. There I have some intuition for the values (which are in
watts) and they tend to act more predictably in hybrid renderers. For
a space game, the lighting has to be all fake anyway (things are too
bright or too dark in real outer space) so what you're doing is
probably the best design.

-m

Prof. Morgan McGuire
Computer Science Department
Williams College
http://cs.williams.edu/~morgan

[bmbsage]

Morgan Great job on your work in G3d....!!

I wish i had the time to put together something like this magnitude..

I'm really thinking about leveraging it for a project I'm working on...

Have you tried porting it to Android yet?

Brian