Progress on my 3D engine

[Ernst Blofeld]

Since lockdown 2 I've been working on a 3D engine in C, and for no other reason than that I'm pleased with myself I'd like to show the progress to date:



As you can see, I have aircraft, tanks, buildings, runways, and they have shadows. There is a sun in the sky that you can't see unless you look up.

The plane is as close as I could get to a Eurofighter Typhoon, the tank is a Challenger 2. The tank would look better if I had more colours, it's not as blob-like as it appears there.

It's all written in C, with the only assembly language being some multiplication of pairs of numbers that doesn't really fit into the C way of doing maths. I don't plan on adding any more assembly language until I'm satisfied with everything else.

[manossg]

Looks great, I love that low-poly aesthetic!

[grond]

That looks very nice! I personally prefer the looks of a more complex flat-shaded 3D engine over those of a low-poly and low-fps texture-mapping engine.

Any info on fps?

[Ernst Blofeld]

Originally Posted by grond

any info on fps?

2.

[Adrian Browne]

Nice- will you make a game or create a reusable 3d game engine to make various types of games/genres or? Anyhow, good work- looks interesting.

[Ernst Blofeld]

Originally Posted by Adrian Browne

Nice- will you make a game or create a reusable 3d game engine to make various types of games/genres or? Anyhow, good work- looks interesting.

I haven't decided yet, but I think I want to add some physics to it so things move in a natural way, then see what happens. It will need a lot of improving before it can be used as for a game.

[Adrian Browne]

Originally Posted by Ernst Blofeld

I haven't decided yet, but I think I want to add some physics to it so things move in a natural way, then see what happens. It will need a lot of improving before it can be used as for a game.

Fair enough. Hope you finish it. New 3d stuff on amigas is a cool thing.

[Ami]

I love low-poly 3D engines.

Originally Posted by Ernst Blofeld

2.

On which CPU?

[Ernst Blofeld]

Originally Posted by Ami

I love low-poly 3D engines.



On which CPU?

Standard 68000, which is all I ever had.

[nikosidis]

Looking great! Why not make a scene, Amiga intro or demo as a start?
Could be released at some party or uploaded to pouet.net so people can download it and make comments.

[Ernst Blofeld]

Originally Posted by nikosidis

Looking great! Why not make a scene, Amiga intro or demo as a start?
Could be released at some party or uploaded to pouet.net so people can download it and make comments.

I'd need to get it to more than 2fps first.

[lmimmfn]

That looks gorgeous, great work, i think folk here would be well able to help you to optimize it.

[Tigerskunk]

Love the flat shaded look as well..
Hopefully you can get the FPS up a bit..

Maybe have a look at Deimos' 3D thread that's hanging around here somewhere..

He worked a lot on these topics already.

[Ernst Blofeld]

Originally Posted by Steril707

Maybe have a look at Deimos' 3D thread that's hanging around here somewhere.

I have read those threads, and there's one optimisation explained in them that I still need to do, but I think my slow fps is mostly down to trying to do too much, both my tank and jet have over 50 polygons each, I need to cut that down a lot.

* If I turn the camera to stare at the sun so that none of the other objects are visible, I get 6fps, so I know it's the drawing part that needs work rather than the calculating part.

[grond]

What's the FPS if you remove the shadows? That could easily be an option for faster CPUs, I guess.

[Ernst Blofeld]

Originally Posted by grond

What's the FPS if you remove the shadows? That could easily be an option for faster CPUs, I guess.

The plane shadows do take some effort, removing them changes the fps from 2 to 2.5. The problem with the plane shadows is that almost every polygon that makes up the could potentially be casting a shadow. It's not as bad as drawing a whole plane as I only need to draw to one bitplane to draw a shadow, but there's a lot of drawing shadow over pixels that have already been drawn as shadow.

The tank and control tower shadows are super quick as they are just an extra couple of polygons that get drawn first and into that one bitplane.

[roondar]

Your engine does look rather nice. And quite the challenge too for it to be aimed at a base level 68000!

[khph_re]

Are you planning on hidden face removal or LOD's? Or have you got that far already?

Also, you could add A cockpit, that would reduce the area you need to draw.


Looks great though!

[Ernst Blofeld]

Originally Posted by khph_re

Are you planning on hidden face removal or LOD's? Or have you got that far already?

Also, you could add A cockpit, that would reduce the area you need to draw.


Looks great though!

I have simple hiddden surface removal with a BSP tree per object.

What's a LOD?

[roondar]

LOD = Level Of Detail
I.E. have several different models of decreasing complexity and show progressively simpler ones as the object is farther and farther away from the camera.