Xmoto for PSP

[parkermauney]

In case you havent heard of it, xmoto is an awesome gpl 2d moto cross game: http://xmoto.tuxfamily.org (http://xmoto.tuxfamily.org/)

I have attempted to do this myself, but i am severely retarded, considering the only app I've ever made was a calculator. This would be my dream homebrew port, next to airstrike (which was recently made)

[parkermauney]

keeping it alive, (sorry for double posting!) This would be awesome!

[PLZKLLME0080]

ya that would be pretty cool to have on the PSP.

[BlackShark]

I have considered doing this, I played the original version and it was Awesome I recently got the new port, Unfortunetly those physics are way to advance for me to attempt, may be a more able Coder would like to do it though.

[parkermauney]

Yeah, if I could even call myself a coder, i would at least attempt this. I'm just too damn stupid! I can't learn C to save my life!

[gambiting]

Hmmm,I've looked at it's source code and it's made using SDL so it shouldn't be very difficult to port...I will see what can be done(but don't take it as promise!I will just see if it builds)

[parkermauney]

Oh god I love you.

You may have to resize some of the sprites.

[gambiting]

If the game builds,then resizing graphics will be a piece of cake....

[parkermauney]

Yeah I figured. If I had a credit card or paypal, I would so send you money. I've always wanted an x-moto port.

[gambiting]

Thanks,but I do it only for fun,if I finish it,it will be 100% free.

[parkermauney]

You're so modest. :p

Any news?

[gambiting]

I'm trying to include everything in one makefile and make it build.I need to figure it out.Just give me some time.

[gambiting]

Uuups,I guess that we won't be able to port it-it uses ODE(open dynamics engine) to render body movements.So I would have to build this libriary for psp,or replace this physics with my own.And both tasks are VERY difficult.Building psp version of libriary is much more difficult that just porting an app.If author has used his own functions for rendering physics it would work,but as it uses external libriary....not much can be done.I will see later what is required to build that lib,and if it can be ported to psp.I will keep you updated.

[PLZKLLME0080]

aw that sucks

[gambiting]

Good news... on ps2dev forums they have told me that Anonymous Tipster has already ported ODE to the psp,so there is a hope after all....I will try to download it and build Xmoto when I have time(tommorow).

[parkermauney]

Ok, great news! I can't wait to see what you can do!

*Plays Super Paper Mario while waiting anxiously for port*

[BlackShark]

Nice, if you were to build it and release it, would it be open source?

[parkermauney]

I would hope so. I could try and tamper with it and maybe build up my coder skills! :p

[gambiting]

Allright,all libs are build and in place,now I need to make makefile work...if it builds then we will be halfway finished...will keep you updated....and yes,it will be open source(it has to be - Xmoto is licensed on gpl so I have to relase it's source code).

[parkermauney]

Great, I couldn't remember if you could sell modified code or not.

[parkermauney]

Soooo, how's it going?

[gambiting]

I'm still working....don't worry,you will be the first one to know when it's done

[parkermauney]

Alright! :D

[factor remix]

This will be great... I cant wait...

[parkermauney]

*Shakes with anticipation*

[parkermauney]

Hey, I hate to ask, but, how's it going?
:D

[gambiting]

Most of the code compiles without problems....but there are some that I don't know how to solve yet-but don't worry,I keep in touch with pspsdk developers so I will soon solve it.

[parkermauney]

K, plz don't die! :D

[PLZKLLME0080]

Omg!!!

[Buddy4point0]

this looks like its gonna be a great port

[potatoman]

cant wait!

[gambiting]

this looks like its gonna be a great port
But only if it works - don't get excited yet.

[Buddy4point0]

i sure hope it does

[parkermauney]

My dream would be very crushed if it doesn't. :(
No pressure.
LOL

[gambiting]

It will take some more time,I've just figured out that I need bz2 compressing libriary to build it,and that libriary is NOT available on psp,and I don't have any idea how to build it without it.It's the last thing that stops me from compiling xmoto for psp.Oh well,I will just have to figure it out.Will keep you updated.

[parkermauney]

OK. Keep up the good work!

[parkermauney]

Looks like things are getting along pretty good! I see you got it to compile!
http://forums.ps2dev.org/viewtopic.php?p=54367&sid=2d272dc19c526c4524ac1389f59b94b1
:D

[gambiting]

Looks like things are getting along pretty good! I see you got it to compile!
http://forums.ps2dev.org/viewtopic.php?p=54367&sid=2d272dc19c526c4524ac1389f59b94b1
:D

No,it does not compile yet,but it was the last problem I needed to solve,now I need to make some modifications in code to make it compile CORRECTLY.Again,I need some time.

[BlackShark]

X-Moto is in C++ right?

[parkermauney]

K, nevermind! But still, doing good!
BlackShark: Yes it is.

[BlackShark]

Good, i thought so

[gambiting]

Arrgh...this game is written so badly - it has c and c++ mixed together to it's a lot of work to make it build for psp....I'm still working in case you're wondering

[parkermauney]

Alright!

[parkermauney]

Just wondering, what are you planning on doing with the button scheme?

[gambiting]

I don't care about it yet.But I guess that UP/DOWN will be as normal,brake will be rectangle,and gas cross.

[SoQb0nc5r]

parkermauney please relax and allow time for gambiting to work, if I was pressured like that I wouldnt do it...

[parkermauney]

I know, but I've had like 14 seizures at the thought of it.

[gambiting]

Hi! I was playing all week with those damn c/c++ mix problems,and I solved all of them now.But now two things pops up.Everything is explained nicely here:
http://forums.ps2dev.org/viewtopic.php?p=54784#54784
If there are any skilled coders,please take a look at it and give me a helping hand,as I can't figure it out.Thanks.

[parkermauney]

Do you need to include libode0 in the makefile?

[gambiting]

Do you need to include libode0 in the makefile?

Forget about it,I'm through it.I have compiled completely xmoto,and copied eboot pbp and all needed files(textures,music,etc.) to my psp,but this game hangs just after start.I don't have any clue what's wrong,as this program does not log it's activity.I will try to figure it out,maybe with psplink and gdb.Will keep you informed.

[parkermauney]

Alright.

[gambiting]

Hmm psp-gdb prints some useless s***,but I've just noticed that xmoto needs 32mb of video ram.....which is a way to much for a psp(it has only 4mb of video ram).I will keep asking if there is any way to overcome this.

[parkermauney]

Alright. I've noticed that supertux has been ported, and it used to run even slower than xmoto on a non-gfx accelerated pc. So it seems possible, though it's written with OpenAl/Gl.

[gambiting]

Don't expect real progress for a week from now,as it's end of school year and I have to finish everything with my grades,so I won't have much time...but I promise I'll continue it when I have time.If you want I can upload a source code so you can try it for yourself.

[parkermauney]

Alright. I'll look at the source code to get familiar with it, though I probably won't be able to improve at all.

[rbervoets]

Bump, keeping it alive !

By the way i love this game!

[gambiting]

The source code is here:
http://rapidshare.com/files/36478425/src.zip

To build it you will need all dependencies(bzip2,ode,sdl) and after compilation you will need to link objects by yourself,replacing psp-gcc with psp-g++(just take last command that will appear when doing normal make - it will end with error).Then you will have normal xmoto.elf file.Strip it and pack with standard pspsdk commands.If you don't want to play with all this,there is already compiled eboot.pbp included.Just copy eboot.pbp,textures and locale folders to /psp/game/xmoto.

[parkermauney]

I get the other parts, but how do I strip elf files?
And must I compile it to create the data files? I'm sure it can't read straight code. :p

[rbervoets]

keeping alive,,,

[BlackShark]

The source code is here:
http://rapidshare.com/files/36478425/src.zip

To build it you will need all dependencies(bzip2,ode,sdl) and after compilation you will need to link objects by yourself,replacing psp-gcc with psp-g++(just take last command that will appear when doing normal make - it will end with error).Then you will have normal xmoto.elf file.Strip it and pack with standard pspsdk commands.If you don't want to play with all this,there is already compiled eboot.pbp included.Just copy eboot.pbp,textures and locale folders to /psp/game/xmoto.
Alright, Ill give it a try.

[rbervoets]

any progress?

[gambiting]

any progress?

I did not even touched it - school first.

[parkermauney]

Yes, give him at least a week.

(I know how you feel, I had exams the last 4 days of school.)

[parkermauney]

So, have you worked on it at all?

[gambiting]

After the end of school year I started debbuging it,but on monday my motherboard fried :( Luckily it was on guarantee,so I will have a new one next week.

[parkermauney]

Alrighty!

Tell us if anything changes.

[rbervoets]

Yes please tell us !

[rbervoets]

Bump...

[gambiting]

Ok,I have confirmed that my new motherboard arrives at tuesday,but as I have to reinstall everything again(it's diffrent model) I will go back to work on wednesday.Will keep you updated.

[parkermauney]

Alright, can't wait for news.

[jandujar]

I'm waiting for weeks to see xmoto for PSP.

I hope you finish the port.

Are you porting the latest 0.31? It uses SDL for graphics

[parkermauney]

Wow, 0.3.1's already out?

He's porting 0.2.7.

[gambiting]

Wow, 0.3.1's already out?

He's porting 0.2.7.

When I started the newest version availiable from sourceforge was 0.2.7.I will check out this 0.3.1 today.

[parkermauney]

Won't you have to restart all your coding though?

Did 0.2.7 not use sdl for graphics?

[jandujar]

why don't you tell us the modifications you done. Maybe we can help you.

[gambiting]

why don't you tell us the modifications you done. Maybe we can help you.

Modifications done in code itself are very minimal - I have only hardcoded few variables,that could not be resolved from psp os,like GAMEDATADIR - it's hardcoded to "ms0:/PSP/GAME/XMOTO/".I mainly focused on building Makefile to force the code to compile,in whatever state it is.I can't find bug that causes Xmoto to stop on psp by reading source code,as it wasn't me who made it.It would take weeks before I would be able to understand the code as my own.It's simplier to build it as is,and then debug it to find where exactly it stops,and then eliminate the problem.Most of the time before succesfull compilation I've spend on looking for libriaries and resolving various linking problems,not reading the code.And don't worry,I'm still working on it,and I don't plan to abandon it anytime soon.If you need any info just ask.

[parkermauney]

So, when errors come up, you can use a debugger to find exactly where the error is? Like the lua debugger?

[gambiting]

So, when errors come up, you can use a debugger to find exactly where the error is? Like the lua debugger?
No - Lua is interpreted language,and C is compiled.That means that in LUA you can see exactly where the error is,while in C you can see only assembly code with that error.Depending on that,you can't find the exact place in source code in C.You have to find out what errror means,rather than where it is.

[parkermauney]

OK, I figured that after seeing screens of psplink.

How do you decipher the problem from hex codes though?

[gambiting]

OK, I figured that after seeing screens of psplink.

How do you decipher the problem from hex codes though?

I don't read straight from hex codes - first debbuger shows me clean assembler code,and values of variables in hex codes.Of course gdb can convert them to normal values,so I can read them.By doing so,I can see what's wrong in debbuged program when it crashes - for example: program stops,when some variable value is "c:\xmoto_logo.png".It's clear that using such path in psp program is impossible,so I will have to find it in real code and change to "ms0:\psp\Xmoto\xmoto_logo.png".But normally things are not that easy :p

[parkermauney]

Oh I see. Yes, I wouldn't think the hardest part to porting apps to psp is changing C:/ to ms0:/ :p

[jandujar]

any progress?

[rbervoets]

bump

[jandujar]

please, continue with xmoto port.

Any progress?

[parkermauney]

How's it coming?

[JPJunkie]

I hope your getting on alright with it as it sounds amazing:thumbup:

[sonic3d]

im also looking forward to this!

[parkermauney]

I think he might of died. :\

[michael chan]

xD maybe... who knows..

[rbervoets]

Im guessing its dead...

[JPJunkie]

Yep he is dead

[michael chan]

MEh... i still get to play across on the dosbox emu on my psp.

[parkermauney]

lol, maybe elma could work?

[goldeneye12r]

I sent him a pm over at neoflash and this is what he said:


Hi! I was working on it,but it comes out that psp does not have enough ram to run it(it still crashes becouse of out of memory errors).Sources of version I've been working on are on the dcemu forums,so anyone can continue it.

So it looks like he isn't working on it anymore...:( Can anyone continue this?

[michael chan]

I sent him a pm over at neoflash and this is what he said:



So it looks like he isn't working on it anymore...:( Can anyone continue this?

i sure can't... but you can play Across on the dosbox emu ( the old versioon of elma )

[sneedee]

how did you get across working? for me it just freezes on the title screen. what version of dosbox are you using?

[parkermauney]

The slim has double memory.
Could it work?