WIP Air Hockey (need help)

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omundodogabriel
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WIP Air Hockey (need help)

Post by omundodogabriel » Wed Apr 10, 2013 1:38 am

Image
This is my second try at the Pong source. This time i decided to modify the engine a bit and make a air hockey game. Remember the table Air Hockey games? Yeah, now you can play on the Uzebox too... :D

This is the first Beta, i have some problems with the game right now, and need some help to fix.
First, the game have slowdowns during gameplay, and sometimes de sprites flicker too. I think is a kernel related problem, anyone know how to fix? Or maybe Uzebox is too weak to handle this?

Controls:
Start - Will start the game
Select - Go back to menu when is ingame
B - Move fast

The first player to score 7 points win!

Like always, sorry for my bad english...
DOWNLOAD Beta 1 and sources
Attachments
Air Hockey_src.zip
(128.85 KiB) Downloaded 142 times
AirHockey.hex
(72.31 KiB) Downloaded 186 times

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uze6666
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Re: WIP Air Hockey (need help)

Post by uze6666 » Wed Apr 10, 2013 2:57 am

Nice, Air Hockey!

Hmmm...you have no WaitVsync(1); in you main loop and code run way too often and, ironically, this will slowdown the game. There's is no point in running the main loop more than 60hz, the screen refresh rate. So fix this with:

Code: Select all

		}else{
			WaitVsync(1);
			ProcessScore();
			ProcessControls();
			ProcessPaddles();
			ProcessBall();
			MoveSprites();
		}
As for the flickers this is caused by not having allocated enough ramtiles. Your sprites are 2x2 which means at most 9 ramtiles are required depending of the x/y offset of the sprite. 9 ramtiles x 3 moving objects means you need 27 ramtiles to avoid flickers.

Here's a hex with the fixes:
AirHockey.hex
(71.25 KiB) Downloaded 177 times
Looking forward the final release! :)

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Kilo
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Re: WIP Air Hockey (need help)

Post by Kilo » Wed Apr 10, 2013 7:42 am

wow, nice!!! Air Hockey!
I guess it's for two players, right?
The last digit of Pi is 7! I calculated this, as I counted to infinity yesterday!

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omundodogabriel
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Re: WIP Air Hockey (need help)

Post by omundodogabriel » Wed Apr 10, 2013 7:25 pm

uze, the hex you provided is running smooth :D thanks....
But i'm having problems trying to implement the changes you say, i changed de -DRAM_TILES_COUNT on kernel flags to 27, and added the WaitVsync(1); to the main loop, but now the game is crashing every time, and random bugs like color changes and duplicated sprites is ocurring :(

I attached the hex that I compiled with these changes ...

Can you upload your modified code please?
Attachments
AirHockey_bug.hex
(72.32 KiB) Downloaded 149 times

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uze6666
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Re: WIP Air Hockey (need help)

Post by uze6666 » Wed Apr 10, 2013 10:05 pm

Weird, those issues are typical when you use too much ram. I'll send the code tonight. In the mean time, can't you post your platform and gcc version. Also if you can post a dump of the build log, specially the part about memory use, that would help.

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omundodogabriel
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Re: WIP Air Hockey (need help)

Post by omundodogabriel » Wed Apr 10, 2013 10:21 pm

uze6666 wrote:Weird, those issues are typical when you use too much ram. I'll send the code tonight. In the mean time, can't you post your platform and gcc version. Also if you can post a dump of the build log, specially the part about memory use, that would help.
Okey ;)

Memory usage:

Code: Select all

AVR Memory Usage
----------------
Device: atmega644
Program:   26324 bytes (40.2% Full)
(.text + .data + .bootloader)
Data:       3783 bytes (92.4% Full)
(.data + .bss + .noinit)
Using: WinAVR-20100110 + Atmel STUDIO 6 on Windows 7, gcc 4.3.2
uzem v1.15

The memory usage is almost full, the extra ramtiles made RAM overflow? :?

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uze6666
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Re: WIP Air Hockey (need help)

Post by uze6666 » Wed Apr 10, 2013 11:32 pm

Here's the project.

Interestingly, the memory stats are different on my side, and I use more RAM! Same WinAVR version. :shock:

Code: Select all

AVR Memory Usage
----------------
Device: atmega644

Program:   25010 bytes (38.2% Full)
(.text + .data + .bootloader)

Data:       3944 bytes (96.3% Full)
(.data + .bss + .noinit)
Attachments
AirHockey.zip
(216.8 KiB) Downloaded 130 times

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omundodogabriel
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Re: WIP Air Hockey (need help)

Post by omundodogabriel » Wed Apr 10, 2013 11:43 pm

Compiled the sources with your modifications, i just modified the kernel path, and still with the bug :( But i think i found the bug, you changed the kernel path, your kernel is probably another version? I will try with the original kernel and see what happens... :?

Edit:
Just used the old kernel from the pong sources and the game worked just fine :D The problem was the last kernel i updated...

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uze6666
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Re: WIP Air Hockey (need help)

Post by uze6666 » Wed Apr 10, 2013 11:55 pm

Oh yes, kernel version..should have asked. I used the latest version from the trunk. It is very stable and the most optimized so far, I'd recommend you use this one if it doesn't cause problems.

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omundodogabriel
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Re: WIP Air Hockey (need help)

Post by omundodogabriel » Thu Apr 11, 2013 12:20 am

uze6666 wrote:Oh yes, kernel version..should have asked. I used the latest version from the trunk. It is very stable and the most optimized so far, I'd recommend you use this one if it doesn't cause problems.
I thought the version that was in "uzebox_src_3.3" was the last, but I found that not. I downloaded the latest SVN version and is working perfectly. I even recovered a lot of ram! Thanks Uze! Tomorrow I'll continue working on AI and improving the title screen.

look the new memory usage:

Code: Select all

		AVR Memory Usage
		----------------
		Device: atmega644
		Program:   25928 bytes (39.6% Full)
		(.text + .data + .bootloader)
		Data:       3234 bytes (79.0% Full)
		(.data + .bss + .noinit)
Thanks!!!

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