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FelipeFS
PostPosted: Sat Apr 07, 2012 6:11 pm 
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Can anyone help me with this main loop? I did it according to the tutorial that I posted before, but I'm not 100% secure. Also, I'm showing the framerate in the window title, but it's showing 31, instead of the expected 30.
Image

You can see the code here:
Spoiler: show
Code:
  BFrames := 0;
  BTimeSkip := 1000 div FFrameRate;
  BTime := GetTickCount;
  BTimeNext := GetTickCount;
  BSecCounter := 0;
 
  while (Self.FApplicationGameRunning = True) do
  begin
    BTime := GetTickCount;

    Self.ProcessMessages;
    Self.ProcessRender;

    BTimeNext := BTimeNext + BTimeSkip;
    BTimeDifference := BTimeNext - GetTickCount;
    if (BTimeDifference >= 0) then
    begin
      Sleep(BTimeDifference);
    end else
    begin
      // The processing is behind; Let it go faster;
    end;

    if (BSecCounter >= 1000) then
    begin
      Self.FForm.Caption := 'FrameRate[' + IntToStr(BFrames) + ']';
      BFrames := 0;
      BSecCounter := 0;
    end;
    BFrames := BFrames + 1;
    BTimingCounter := BTimingCounter + BTimeDifference;
  end;
 

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Alberth
PostPosted: Sat Apr 07, 2012 8:27 pm 
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Quote:
BTimeSkip := 1000 div FFrameRate;
The most likely thing I can find is this. Assuming everything is an integer, your value may get rounded down, so you wait slightly too short, and you get more frames than you expect.

Not sure how much you should try to really get 30. I'd be happy with 29 or 31.

It may not even be possible to get exactly 30, as you have to wait 33.33333333333333333333333333 milliseconds (I forgot infinitely many 3s at the end, but you get the idea :) ) then, which is an awkward value.

20 frames of 25 frames should be easier, as the 'div' works nicely with those values.


(In my project, I have the reverse problem, I wait 30 milliseconds, so my framerate is a very weird number :p ).

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FelipeFS
PostPosted: Sun Apr 08, 2012 5:40 pm 
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Thank you! I think you are right. :)

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FelipeFS
PostPosted: Thu May 17, 2012 9:09 pm 
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Boys and Girls, now Machina Engine is able to use sprites!!!!!!

Little fish inspired in E.V.O.:
Image
:rock Yeah, baby!
Most of the updates I'm posting on my blog: http://pixeldeveloper.blogspot.com.br/

Well, I was very surprised... all the process(initialize the main class, load data files, parser them, load rooms/maps inside them, load the objects inside the maps, load resource files, and load all sprites from the resource files) took only 93 milliseconds. Very fast.

This weekend will be exciting!

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Codehead
PostPosted: Fri May 18, 2012 8:05 pm 
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Nice to see this moving forward. Keep it up. 8)

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FelipeFS
PostPosted: Sat May 19, 2012 8:46 pm 
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My first video showing a small example:

http://youtu.be/YDKMPhkKHgM

The movement in the video is flickering a bit, but it is actually very smooth :yeah

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Alberth
PostPosted: Sat May 19, 2012 9:15 pm 
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Looking great!

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FelipeFS
PostPosted: Sun Jun 10, 2012 9:42 pm 
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I got a little stucked in recent days. I started to re-write the code to use XML as data files(Yeah, I envied Alberth :rofl ). I'm almost done with this conversion, and I am happy that the result has been positive. Using my parser, the code was less flexible and slower to load. To give you an idea, the same test that I have shown above now varies between 30-72 milliseconds to load. :rock
Looks little bit, but with a big data file these milliseconds could change to big amount of seconds.

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Alberth
PostPosted: Mon Jun 11, 2012 4:35 am 
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FelipeFS wrote:
I got a little stucked in recent days. I started to re-write the code to use XML as data files(Yeah, I envied Alberth :rofl ).
No need for envy, just copy approaches that work :D

FelipeFS wrote:
I'm almost done with this conversion, and I am happy that the result has been positive. Using my parser, the code was less flexible and slower to load. To give you an idea, the same test that I have shown above now varies between 30-72 milliseconds to load. :rock
Looks little bit, but with a big data file these milliseconds could change to big amount of seconds.
I think the key-phrase here is 'more flexible'. Parser speedup is nice until you go below the data-transfer limit of the hard-disk, then it's totally irrelevant (since you cannot parse data faster than it is coming in from the disk).

Nonetheless, a factor 2 is quite good :)

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FelipeFS
PostPosted: Mon Jun 11, 2012 9:12 am 
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Pheeeeeeeeeeeww... All night working, and the code was fully adapted to XML.

Unfornately, my game engine will work only for Free Pascal for a while, because Delphi uses a different library for XML parsing, and booth of the libraries(the on used by Free Pascal, and the one used by Delphi) are very hard to make work in booth IDEs.

THIS TIME, I will really implement the code to show maps.

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Mugai
PostPosted: Mon Jun 11, 2012 10:48 pm 
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FelipeFS wrote:
Pheeeeeeeeeeeww... All night working, and the code was fully adapted to XML.

Just out of curiosity Felipe, did you consider JSON for data? I tend to prefer it over XML (which is a bit unwieldy, in my personal view).

Either way is good, was just wondering if you'd looked into it. :)

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FelipeFS
PostPosted: Tue Jun 12, 2012 2:01 am 
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NEVER heard about it! I will take a look how it is. Thank you!

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FelipeFS
PostPosted: Tue Jun 12, 2012 11:23 am 
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Swim, little fish, swin for your life!
http://www.youtube.com/watch?v=tcJlSJyhNa8&feature=plcp

Physics Engine - what is working:
    [li]Force application;[/li]
    [li]Velocity;[/li]
    [li]Acceleration;[/li]
    [li]Friction(specified for an object, and uncconditional, which works every moment);[/li]

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weezl
PostPosted: Tue Jun 12, 2012 2:02 pm 
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needs a bigger fish thats hunting him :D

looks good though

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tarpeyd12
PostPosted: Fri Jun 15, 2012 5:36 am 
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weezl wrote:
needs a bigger fish thats hunting him :D


There is always a bigger fish ...

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FelipeFS
PostPosted: Fri Jun 15, 2012 6:17 am 
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tarpeyd12 wrote:
weezl wrote:
needs a bigger fish thats hunting him :D


There is always a bigger fish ...


Yeah! ahahahahahah that's way I did it! :rofl

Here is a link for download: [Link]

The files need to be extracted in "C:\", I forgot to implement to make the game search the data and resource files in another directory.

And the game is a bit slow, because the Shark(the enemy) make a math to get the angle between itself and the fish every time. Such math sould be done at a time interval, but the TimerEvent is being implemented yet.

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FelipeFS
PostPosted: Fri Jun 15, 2012 6:20 am 
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OH, yeah, and don't be scared with the console window with a lot of messages. It is for debugging.

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tarpeyd12
PostPosted: Fri Jun 15, 2012 6:37 am 
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FelipeFS wrote:
OH, yeah, and don't be scared with the console window with a lot of messages. It is for debugging.


you mean this console output?

Image

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FelipeFS
PostPosted: Fri Jun 15, 2012 6:41 am 
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Yeah =)

And... how are you running it on Ubuntu???

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tarpeyd12
PostPosted: Fri Jun 15, 2012 6:43 am 
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FelipeFS wrote:
And... how are you running it on Ubuntu???


Wine, it is a system to run windows programs on non-windows machines.

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