G.T.A.2 Map Editor

[Ñuño Martínez]

First, nice job. I was reading and looking the videos for a time and I like it.

I'm wondering if it can be used for games other than GTA2. I mean create new games.

[hwnd]

Thanks.

I have plan to add support for GTA1 but very few people actually play it.
But there are some other similar games.

I want to add a simple ped to map renderer and walk around on map, with collisions etc.
Just for fun. If i can get this work, i will add more things maybe. If it's not gonna be a game, then it would be like preview of map ingame that you just created, without actually running GTA2. So you can see preview of the map like in game.

But atm im taking a break from this editor project. Im not the guy who can work on one thing for very long time "in one row". I need to do some other things and then come back, everything helps, maybe even getting away from pc for a while, work on my car, just walking outside etc. I get my motivation this way.
Atm i don't have any of it to work on this editor. But i will get it back soon and then i will continue.

Instead i work on new script compiler for GTA2. It's a combination of C++ and Delphi.
Very interesting to code. And it works pretty well already, GTA2 is happy with them.
Ofc i can only compile simple scripts atm, nothing complex like IF..THEN..ELSE or WHILE etc.
Im starting with basics.

[hwnd]

I wanted to work on this thing again and once again, taking a break from project helps.
I found good tutorial and example for handling NPOT textures here:

http://lazyfoo.net/tutorials/OpenGL/...ures/index.php

So i took some NPOT textures from GTA2 and and they all are rendered correctly.
I have to use DevIL with Delphi and additional DLL's but the result is awesome.


What's even more important and awesome for me is that these are all quads rendered with OpenGL and textured with NPOT textures. This is exactly what i wanted.
And if i understand correctly they all are centered. It was very hard for me to make work, but that example solved this.

Im not sure if i can get rid of the DevIL but if yes, tell me.
I was so excited so i even didn't properly read the source and what it does exactly.
If it's possible to get rid of it, i will use nxPascal stuff.

Here are few examples

[Carver413]

in newer versions of opengl textures need not be powers of 2 to work. I create many textures on the fly and none of them are powers of 2 and they render fine.

[Rodrigo Robles]

in newer versions of opengl textures need not be powers of 2 to work. I create many textures on the fly and none of them are powers of 2 and they render fine.

I read somewhere that although non power of 2 textures are supported, the power of 2 will get better performance. I would like to know how much better performance...

[Carver413]

I read somewhere that although non power of 2 textures are supported, the power of 2 will get better performance. I would like to know how much better performance...

I read somewhere that opengl actually expands these internally so they end up as power of 2 anyway. the advantage would be in the passing of smaller texture or maybe thats where the slowdown occures. best practice of course would be to try to put them on a single texture and map them properly

[hwnd]

I have old PC with old gfx card ATI Radeon 9550. And i want to support old hw and os starting from Windows 95. Better don't ask why. I love the old stuff and software. I dunno, if nxPascal GL code supports W95, with the latest possible OpenGL dll in it. I will try with my editor. I don't use any shaders or anything in my editor and "biggest" textures are 64x64.
Just the sprites from GTA2 files are different, like 16x78, 2x28 etc. I don't use any texture atlas, they seem to be too complicated for me.

Te DevIL actually seems to have bug or im just not doing enough or doing something wrong but NPOT .bmp files are completely screwed when rendering them with same code. PNG works fine. I havent tried the pure pixels from pointer. Will do this later, hopefully it will work.

[User137]

If it's possible to get rid of it, i will use nxPascal stuff.

Yes nxPascal supports NPOT textures. There should also be demo that shows drawing 2D centered, and it allows rotation point be anywhere in (or out of) the image. Demos use POT texture sizes only because they are most compatible, but you can freely edit the images in Paint/Gimp or other and any size would work.

Also the link you gave http://lazyfoo.net/tutorials/OpenGL/...ures/index.php is not actually using NPOT but it's putting small picture into larger 1024x256 texture with black pixels outside. That's not best way to handle it, although as i have mentioned before, is also possible with nxPascal through texture options...