AmiDARK Engine - Alpha WIP - 2D Demo

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AmiDARK

Posted on: 2009/9/14 1:50 #1

Quite a regular

Hi all :)
I put a small demo showing the project progress.
It uses 2D Images ( OpenGL Textures), alpha mapping and transparency.
There are parallax and differencials scrollings.

Here is the link to Download the demo :
http://www.odyssey-creators.com/AmiDARK_Engine0.1WIP_2DDemo.rar

Here is also a snapsho made with SGrab showing the demo:
http://www.odyssey-creators.com/AmiDARKEngine0.1WIP2DDemo.png
It should be similar to this (excepted the trees and grass that should appear correctly and not like in the shot ... SGrab cause some bugs in OpenGL :( )

And now, for those that'll like to see the Demo source code, here it is :


/*********************************************************** 

** 

** AmiDARK Engine Development Project 

**------------------------------------ 

** 

** Sample : Textures/Images demonstration 

** Author : Frederic Cordier 

** Date :   2009JUI22-043821 ** 

************************************************************ 

*/ 

#!include! "AmiDARKEngine.c" 

  int ILoop; 

  float XMountain[3]; 

  float XTrees[ 4 ]; 

  float XHerbs[ 3 ]; 

  float XClouds[5][ 2 ]; 



void DarkLoop( void ){ 

  // Set display mode to 640x480 using 32bits

  DESetDisplayMode( 640, 480, 32 ); 

  // Define default images positions for all elements that'll scroll.

  // Mountains

  XMountain[ 1 ] = 0.0; 

  XMountain[ 2 ] = 512.0; 

  XMountain[ 3 ] = 1024.0; 

  // Trees.

  XTrees[ 1 ] = 0.0; 

  XTrees[ 2 ] = 512.0; 

  XTrees[ 3 ] = 1024.0; 

  XTrees[ 4 ] = 1536.0; 

  // Grass.

  XHerbs[ 1 ] = 0.0; 

  XHerbs[ 2 ] = 512.0; 

  XHerbs[ 3 ] = 1024.0; 

  // Clouds.

  XClouds[1][ 1 ] = 0.0; 

  XClouds[1][ 2 ] = 640.0; 

  XClouds[2][ 1 ] = 0.0; 

  XClouds[2][ 2 ] = 640.0; 

  XClouds[3][ 1 ] = 0.0; 

  XClouds[3][ 2 ] = 640.0; 

  XClouds[4][ 1 ] = 0.0; 

  XClouds[4][ 2 ] = 640.0; 

  XClouds[5][ 1 ] = 0.0; 

  XClouds[5][ 2 ] = 640.0; 

  // Set the amount of used textures

  DESetMaximumTextures( 13 ); 

  // Load all images. 

  DELoadImageEx( "Images/RTSky02_SunWake05.png", 1,  0 ); 

  DELoadImageEx( "Images/Mountains512.png", 2, 0); 

  DELoadImageEx( "Images/Layer_Trees512A.png", 3, 0); 

  DELoadImageEx( "Images/Layer_Trees512B.png", 4, 0); 

  DELoadImageEx( "Images/Layer_Herbs512.png", 5, 0); 

  DELoadImageEx( "Images/Layer_Water640.png", 6, 0); 

  DELoadImageEx( "Images/Layer_Cllouds4[640x12]_Alpha.png",7, 0 ); 

  DELoadImageEx( "Images/Layer_Cllouds3[640x18]_Alpha.png",8, 0 ); 

  DELoadImageEx( "Images/Layer_Cllouds2[640x38]_Alpha.png",9, 0 ); 

  DELoadImageEx( "Images/Layer_Cllouds1[640x80]_Alpha.png",10, 0 ); 

  DELoadImageEx( "Images/Layer_Cllouds0[640x42]_Alpha.png",11, 0 ); 

  DELoadImageEx( "Images/Layer_Ground[640x60].png", 12,0 ); 

  DELoadImageEx( "Images/Logo.png", 13, 0 ); 

  DECls(); 

  while( !DELoop() ){ 

    // Blue sky, Moon & Sun 

    DEPasteImage( 1, 0, 0 ); 

    // Mountains scroll 

    for ( ILoop = 1; ILoop  < 4; ILoop++ ){ 

      XMountain[ ILoop ] =  XMountain[ ILoop ] - 0.25; 

      if ( XMountain[ ILoop  ;] < -640.0 ){ 

        XMountain[ ILoop ]& nbsp;= XMountain[ ILoop ] + 640.0; 

       } 

      DEPasteImageEx( 2, (int)XMounta in[ ILoop ], 224, 1 ); 

      // Display mountains

      DEPasteImage( 6, (int)XMountain [ ILoop ], 320 ); 

     } 

    // Trees scrolling

    for ( ILoop = 1; ILoop  < 5; ILoop++ ){ 

      XTrees[ ILoop ] = XTr ees[ ILoop ] - 0.70; 

      if ( XTrees[ ILoop ]& nbsp;< -512 ){ 

        XTrees[ ILoop ]&nbs p;= XTrees[ ILoop ] + 2048.0; 

       } 

     } 

    // Clouds scrolling using 2 parallax

    for ( ILoop = 1; ILoop  < 3; ILoop++ ){ 

      XClouds[1][ ILoop ] =  ;XClouds[1][ ILoop ] - 0.15; 

      if ( XClouds[1][ ILoop&nbs p;] < -640.0 ){ 

        XClouds[1][ ILoop ]  = XClouds[1][ ILoop ] + 640.0; 

       } 

      XClouds[2][ ILoop ] =  ;XClouds[2][ ILoop ] - 0.30; 

      if ( XClouds[2][ ILoop&nbs p;] < -640.0 ){ 

        XClouds[2][ ILoop ]  = XClouds[2][ ILoop ] + 640.0; 

       } 

      XClouds[3][ ILoop ] =  ;XClouds[3][ ILoop ] - 0.45; 

      if ( XClouds[3][ ILoop&nbs p;] < -640.0 ){ 

        XClouds[3][ ILoop ]  = XClouds[3][ ILoop ] + 640.0; 

       } 

      XClouds[4][ ILoop ] =  ;XClouds[4][ ILoop ] - 0.60; 

      if ( XClouds[4][ ILoop&nbs p;] < -640.0 ){ 

        XClouds[4][ ILoop ]  = XClouds[4][ ILoop ] + 640.0; 

       } 

      XClouds[5][ ILoop ] =  ;XClouds[5][ ILoop ] - 0.75; 

      if ( XClouds[5][ ILoop&nbs p;] < -640.0 ){ 

        XClouds[5][ILoop ]  = XClouds[5][ ILoop ] + 640.0; 

       } 

     } 

    // Display all clouds

    DEPasteImageEx( 7, XClouds[1][ 1  ], 178, 1 ); 

    DEPasteImageEx( 7, XClouds[1][ 2  ], 178, 1 ); 

    DEPasteImageEx( 8, XClouds[2][ 1  ], 160, 1 ); 

    DEPasteImageEx( 8, XClouds[2][ 2  ], 160, 1 ); 

    DEPasteImageEx( 9, XClouds[3][ 1  ], 122, 1 ); 

    DEPasteImageEx( 9, XClouds[3][ 2  ], 122, 1 ); 

    DEPasteImageEx( 10, XClouds[4][ 1  ;], 42, 1 ); 

    DEPasteImageEx( 10, XClouds[4][ 2  ;], 42, 1 ); 

    DEPasteImageEx( 11, XClouds[5][ 1  ;], 0, 1 ); 

    DEPasteImageEx( 11, XClouds[5][ 2  ;], 0, 1 ); 

    // Display the trees.

    for( ILoop = 1; ILoop <&n bsp;3; ILoop++ ){ 

      DEPasteImageEx( ILoop + 2,  (int)XTrees[ ILoop ], 214, 1 ); 

      DEPasteImageEx( ILoop + 2,  (int)XTrees[ ILoop + 2 ], 214, 1 ); 

      DEPasteImage( 12, (int)XTrees[& nbsp;ILoop ], 420 ); 

      DEPasteImage( 12, (int)XTrees[& nbsp;ILoop + 2 ], 420 ); 

     } 

    // Grass scroll

    for ( ILoop = 1; ILoop  < 4; ILoop++ ){ 

      XHerbs[ ILoop ] = XHe rbs[ ILoop ] - 1.0; 

      if ( XHerbs[ ILoop ]& nbsp;< - 512 ){ 

        XHerbs[ ILoop ]&nbs p;= XHerbs[ ILoop ] + 1536.0; 

       } 

      DEPasteImageEx( 5, XHerbs[  ;ILoop ], 440, 1 ); 

     } 

    // display Demo logo

    DEPasteImageEx( 13, 64, 48, 1&nbs p;); 

    // Synchro. 

    DESync(); 

   } 

  // Erase all images from memory.

  for ( ILoop = 1; ILoop < 14;  ILoop++ ){ 

    DEDeleteImage( ILoop ); 

   } 

 }

Wow ! So similar to Basic languages :p and it's C :)
Feel free to give your opinion about this small demo.

@ +
AmiDARK

Edited by freddix on 2009/9/15 20:49:10
Edited by freddix on 2009/9/15 20:49:48

All we have to decide is what to do with the time that is given to us.

TiredOfLife

Re: AmiDARK Engine - Alpha WIP - 2D Demo

Posted on: 2009/9/14 2:22 #2

Quite a regular

@freddix

Reminds me of the Psygnosis games.

unimon

Re: AmiDARK Engine - Alpha WIP - 2D Demo

Posted on: 2009/9/15 0:37 #3

Just popping in

@freddix

Wow, very nice !! Have you been able to implement the Amos routine engine or something like that ? Or not yet ?

Anyway, thanks for keeping your work "alive".

Nic

AmiDARK

Re: AmiDARK Engine - Alpha WIP - 2D Demo

Posted on: 2009/9/15 1:03 #4

Quite a regular

@unimon:
Nothing from AMOS
Actually all is developed from scratch.
All is NEW :p

Amos compatibility will come later ;)

All we have to decide is what to do with the time that is given to us.

Hans

Re: AmiDARK Engine - Alpha WIP - 2D Demo

Posted on: 2009/9/15 5:30 #5

Home away from home

@freddix

Quote:

Here is also a snapsho made with SGrab showing the demo:
http://www.odyssey-creators.com/AmiDARKEngine0.1WIP2DDemo.png
It should be similar to this (excepted the trees and grass that should appear correctly and not like in the shot ... SGrab cause some bugs in OpenGL :( )

I'm pretty sure that the bug is in your image to texture loading code. Look up glPixelStoref(), and check your image loading code. In particular, have a look at GL_UNPACK_ALIGNMENT, and GL_UNPACK_ROW_LENGTH. Slanted textures are usually caused by getting the alignment wrong when copying an image into a texture. Notice that all images with a width of 512 are correctly aligned, but not images with a width of 640 (that includes the clouds, although it's hard to tell).

Incorrect glPixelStore settings have caught me out before too. GlPixelStore also applies to glDrawPixels()/glReadPixels().

Hans

EDIT: Correction, it looks like all of the images except for the logo are slanted.

Edited by Hans on 2009/9/15 7:59:20

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Menthos

Re: AmiDARK Engine - Alpha WIP - 2D Demo

Posted on: 2009/9/15 8:42 #6

Just popping in

@Hans

It can also be because the SGrab is not fast enough to grab the whole window in one frame.

To get correct screenshots of OpenGL it is better to write own code to dump the databuffer to disk and convert it to png.

SGrab vs. buffer dump

/Me, myself and A1G4!

AmiDARK

Re: AmiDARK Engine - Alpha WIP - 2D Demo

Posted on: 2009/9/15 9:09 #7

Quite a regular

The 2 images that are not slanted are logo and sun+moon backdrop
these 2 images does not move.
I think that the problem is the one menthos said.

Thank you for your comments.
Regards,
AmiDARK

All we have to decide is what to do with the time that is given to us.

Hans

Re: AmiDARK Engine - Alpha WIP - 2D Demo

Posted on: 2009/9/15 9:09 #8

Home away from home

@Menthos

Quote:

Menthos wrote:
@Hans

It can also be because the SGrab is not fast enough to grab the whole window in one frame.

To get correct screenshots of OpenGL it is better to write own code to dump the databuffer to disk and convert it to png.

SGrab vs. buffer dump

Possible, although I've never experienced that. I have had SGrab delay grabbing a frame because of low priority, but never had it smear the graphics.

Hans

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Hans

Re: AmiDARK Engine - Alpha WIP - 2D Demo

Posted on: 2009/9/15 9:14 #9

Home away from home

@freddix

Quote:

freddix wrote:
The 2 images that are not slanted are logo and sun+moon backdrop
these 2 images does not move.
I think that the problem is the one menthos said.

Thank you for your comments.
Regards,
AmiDARK

In that case, try raising the priority of SGrab. You may also wish to limit the frame-rate at which you're rendering. It's not necessary, but there's no point in rendering at 100+ fps when your monitor is running at 60 Hz.

Hans

Join Kea Campus' Amiga Corner and support Amiga content creation
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AmiDARK

Re: AmiDARK Engine - Alpha WIP - 2D Demo

Posted on: 2009/9/15 13:19 #10

Quite a regular

@Hans
Yes,
My demo actually run at full frame rate
I plan to add the :
Sync Rate XXX
command to allow user to define the frame rate he liked to have.

Regards,
AmiDARK.

All we have to decide is what to do with the time that is given to us.

Snuffy

Re: AmiDARK Engine - Alpha WIP - 2D Demo

Posted on: 2009/9/15 19:23 #11

Just can't stay away

Hi @Hans
#8
SGrab cause some bugs in OpenGL :( )

Possible, although I've never experienced that. I have had SGrab delay grabbing a frame because of low priority, but never had it smear the graphics.

SGrab - using JPG - will wringle with default 85% JPEG QUALITY. I use 100% for posting pictures at FLICKr. For example:
http://www.flickr.com/photos/11367727@N07/3923374742/

AmiDARK

Re: AmiDARK Engine - Alpha WIP - 2D Demo

Posted on: 2009/9/15 20:34 #12

Quite a regular

@Snuffy
You cannot compare a card game with a scrolling graphic.
Card game is static and when you take the shot, nothing move on screen (or seem to ~).

All we have to decide is what to do with the time that is given to us.

Snuffy

Re: AmiDARK Engine - Alpha WIP - 2D Demo

Posted on: 2009/9/16 21:59 #13

Just can't stay away

@freddix

Oops, I was referring to SGrab wrinkles.
...a scrolling graphic...
I know, it's called 'parallax scrolling.' I was comparing your demo to a SDLBasic demo-'Shadow of the Beast' which does 15 levels of scrolling.

BTW, my poker table is not static, it's animated. Cards, poker chips, and dealer button move around. Animation is the my current study in SDLBasic. I enjoyed looking into your demo. I'm thinking of using a couple levels of 'parallax scrolling' in my game. They're used a lot in casino games I've seen.

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