www.digitalmars.com         C & C++   DMDScript  

digitalmars.D.announce - GDC 2006 2D Physics Demo for D

reply clayasaurus <clayasaurus gmail.com> writes:
After quite a conversion process, I've successfully converted the c++ 
GDC 2006 2D Physics demo to D.

Original:
http://www.gphysics.com/archives/18

D Version: 
http://www.dsource.org/projects/arcgames/browser/trunk/physics/demo.zip?format=raw

Use keys 1-9 to switch through demo, and space bar to launch the 'bomb'.

It also comes with a public domain red black tree implementation that 
seems to work. The author of 
http://eternallyconfuzzled.com/tuts/redblack.html told me he is going to 
add a license page that says all the code on his pages are in public 
domain.

Special thanks to Christian Kamm for helping me track done a bug.

~ Clay
Oct 30 2006
next sibling parent reply "Jarrett Billingsley" <kb3ctd2 yahoo.com> writes:
"clayasaurus" <clayasaurus gmail.com> wrote in message 
news:ei67hf$2dgi$1 digitaldaemon.com...

 After quite a conversion process, I've successfully converted the c++ GDC 
 2006 2D Physics demo to D.

 Original:
 http://www.gphysics.com/archives/18

 D Version: 
 http://www.dsource.org/projects/arcgames/browser/trunk/physics/demo.zip?format=raw

 Use keys 1-9 to switch through demo, and space bar to launch the 'bomb'.

 It also comes with a public domain red black tree implementation that 
 seems to work. The author of 
 http://eternallyconfuzzled.com/tuts/redblack.html told me he is going to 
 add a license page that says all the code on his pages are in public 
 domain.

 Special thanks to Christian Kamm for helping me track done a bug.

 ~ Clay



Sweet, but it runs at about 3000 FPS, and so is nearly impossible to see 
anything running except the pyramid demo.  I see some kind of delta timing 
with the "dt" global in main.d, but it's set to a constant 1/60, and in 
windowed mode on Windows, it'll try to update the screen as fast as 
possible, so the frame time will be something other than 1/60 of a second.

Is there maybe a way to force it to run in fullscreen, so it's limited to 
the refresh rate?  I'd recompile it but I don't have Derelict, so..
Oct 30 2006
parent reply clayasaurus <clayasaurus gmail.com> writes:
Jarrett Billingsley wrote:

 "clayasaurus" <clayasaurus gmail.com> wrote in message 
 news:ei67hf$2dgi$1 digitaldaemon.com...

 After quite a conversion process, I've successfully converted the c++ GDC 
 2006 2D Physics demo to D.

 Original:
 http://www.gphysics.com/archives/18

 D Version: 
 http://www.dsource.org/projects/arcgames/browser/trunk/physics/demo.zip?format=raw

 Use keys 1-9 to switch through demo, and space bar to launch the 'bomb'.

 It also comes with a public domain red black tree implementation that 
 seems to work. The author of 
 http://eternallyconfuzzled.com/tuts/redblack.html told me he is going to 
 add a license page that says all the code on his pages are in public 
 domain.

 Special thanks to Christian Kamm for helping me track done a bug.

 ~ Clay



 Sweet, but it runs at about 3000 FPS, and so is nearly impossible to see 
 anything running except the pyramid demo.  I see some kind of delta timing 
 with the "dt" global in main.d, but it's set to a constant 1/60, and in 
 windowed mode on Windows, it'll try to update the screen as fast as 
 possible, so the frame time will be something other than 1/60 of a second.
 
 Is there maybe a way to force it to run in fullscreen, so it's limited to 
 the refresh rate?  I'd recompile it but I don't have Derelict, so.. 
 



Derelict comes with the demo.zip package along with SDL.dll. If you have 
the D compiler and build, all you need to do is 'build main.d -Rn -full 
-release -O' to build it.

Throw in an SDL_Delay(40) in the main while loop if you want a quick 
solution, or add a 'flags = SDL_OPENGL | SDL_FULLSCREEN' to the SDL 
video flags for fullscreen in main.d around line 668.

Within the next year or so I'm going to integrate this into my 2D game 
library ( http://arcgames.dsource.org/arc/arc/time.html ) which has a 
delay timer that will delay the main loop as needed to keep a constant 
frame rate.

I need to figure out how to add circle shapes and eventually polygon 
shapes, however the author says at GDC 2007 he'll put more shapes in his 
demo. There is also a java port that supports circle and line shapes 
http://code.google.com/p/phys2d/
Oct 30 2006
next sibling parent reply "Jarrett Billingsley" <kb3ctd2 yahoo.com> writes:
"clayasaurus" <clayasaurus gmail.com> wrote in message 
news:ei6dp6$2i50$1 digitaldaemon.com...

 Derelict comes with the demo.zip package along with SDL.dll. If you have 
 the D compiler and build, all you need to do is 'build 
 main.d -Rn -full -release -O' to build it.

 Throw in an SDL_Delay(40) in the main while loop if you want a quick 
 solution, or add a 'flags = SDL_OPENGL | SDL_FULLSCREEN' to the SDL video 
 flags for fullscreen in main.d around line 668.



Ahh, great, that worked :)  So much cooler when it's running at a reasonable 
speed.  Though strangely putting it in fullscreen didn't help.  Apparently, 
there's a way to make SDL wait until a vertical retrace until it updates the 
screen, using SDL_DOUBLEBUF for the video flags and SDL_Flip() at the end of 
the loop, but I tried that and that didn't help either.
Oct 30 2006
parent reply Olli Aalto <oaalto gmail.com> writes:
Jarrett Billingsley wrote:

 "clayasaurus" <clayasaurus gmail.com> wrote in message 
 news:ei6dp6$2i50$1 digitaldaemon.com...

 Derelict comes with the demo.zip package along with SDL.dll. If you have 
 the D compiler and build, all you need to do is 'build 
 main.d -Rn -full -release -O' to build it.

 Throw in an SDL_Delay(40) in the main while loop if you want a quick 
 solution, or add a 'flags = SDL_OPENGL | SDL_FULLSCREEN' to the SDL video 
 flags for fullscreen in main.d around line 668.



 Ahh, great, that worked :)  So much cooler when it's running at a reasonable 
 speed.  Though strangely putting it in fullscreen didn't help.  Apparently, 
 there's a way to make SDL wait until a vertical retrace until it updates the 
 screen, using SDL_DOUBLEBUF for the video flags and SDL_Flip() at the end of 
 the loop, but I tried that and that didn't help either. 
 
 



The SDL_DOUBLEBUF and SDL_Flip() are not used in OpenGL mode. The 
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1) and SDL_GL_SwapBuffers() are 
used instead respectively. I haven't looked at the code yet, but I 
believe those are used there.

As what comes to the vsync you could try 
SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, 1)[1]. Put it before the call 
to SDL_SetVideoMode().

O.

1. http://www.libsdl.org/cgi/docwiki.cgi/SDL_5fGL_5fSetAttribute
    http://www.libsdl.org/cgi/docwiki.cgi/SDL_5fGLattr
Oct 31 2006
parent reply "Jarrett Billingsley" <kb3ctd2 yahoo.com> writes:
"Olli Aalto" <oaalto gmail.com> wrote in message 
news:ei7088$2vl4$1 digitaldaemon.com...

 The SDL_DOUBLEBUF and SDL_Flip() are not used in OpenGL mode. The 
 SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1) and SDL_GL_SwapBuffers() are 
 used instead respectively. I haven't looked at the code yet, but I believe 
 those are used there.

 As what comes to the vsync you could try 
 SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, 1)[1]. Put it before the call to 
 SDL_SetVideoMode().



Crap!  The version of SDL that Derelict (or at least the Derelict that comes 
with Clay's demo) is 1.2.0, and SDL_GL_SWAP_CONTROL is only available 
starting with 1.2.10.  Have to do some more fiddling this afternoon..
Oct 31 2006
parent reply Mike Parker <aldacron71 yahoo.com> writes:
Jarrett Billingsley wrote:

 "Olli Aalto" <oaalto gmail.com> wrote in message 
 
 Crap!  The version of SDL that Derelict (or at least the Derelict that comes 
 with Clay's demo) is 1.2.0, and SDL_GL_SWAP_CONTROL is only available 
 starting with 1.2.10.  Have to do some more fiddling this afternoon.. 
 



Actually, the version of Derelict with the demo should support SDL 
1.2.10 (as defined in sdlversion.d). The missing enum was a bug. It was 
also missing SDL_GL_ACCELERATED_VISUAL. The Derelict trunk has been 
updated with the fix.
Oct 31 2006
parent Mike Parker <aldacron71 yahoo.com> writes:
Mike Parker wrote:

 Jarrett Billingsley wrote:

 "Olli Aalto" <oaalto gmail.com> wrote in message
 Crap!  The version of SDL that Derelict (or at least the Derelict that 
 comes with Clay's demo) is 1.2.0, and SDL_GL_SWAP_CONTROL is only 
 available starting with 1.2.10.  Have to do some more fiddling this 
 afternoon..



 Actually, the version of Derelict with the demo should support SDL 
 1.2.10 (as defined in sdlversion.d). The missing enum was a bug. It was 
 also missing SDL_GL_ACCELERATED_VISUAL. The Derelict trunk has been 
 updated with the fix.



Correction -- the trunk is being updated with the fix. I keep timing 
out. I'll post on the Derelict forums when it succeeds.
Oct 31 2006
prev sibling parent Lucas Goss <lgoss007 gmail.com> writes:
clayasaurus wrote:

 Within the next year or so I'm going to integrate this into my 2D game 
 library ( http://arcgames.dsource.org/arc/arc/time.html ) which has a 
 delay timer that will delay the main loop as needed to keep a constant 
 frame rate.



I think it would be better to use frame rate independence. By delaying 
the main loop some input can become jagged and seem unresponsive (mouse 
jumping places). I know I've seen some articles on gamedev.net, now 
where were they...

http://www.gamedev.net/reference/articles/article1604.asp
http://www.gamedev.net/reference/articles/article1382.asp

lucas
Oct 31 2006
prev sibling next sibling parent Hasan Aljudy <hasan.aljudy gmail.com> writes:
wow .. just amazing!!

clayasaurus wrote:

 After quite a conversion process, I've successfully converted the c++ 
 GDC 2006 2D Physics demo to D.
 
 Original:
 http://www.gphysics.com/archives/18
 
 D Version: 
 http://www.dsource.org/projects/arcgames/browser/trunk/physics
demo.zip?format=raw 
 
 
 Use keys 1-9 to switch through demo, and space bar to launch the 'bomb'.
 
 It also comes with a public domain red black tree implementation that 
 seems to work. The author of 
 http://eternallyconfuzzled.com/tuts/redblack.html told me he is going to 
 add a license page that says all the code on his pages are in public 
 domain.
 
 Special thanks to Christian Kamm for helping me track done a bug.
 
 ~ Clay
Oct 30 2006
prev sibling parent reply Walter Bright <newshound digitalmars.com> writes:
clayasaurus wrote:

 After quite a conversion process, I've successfully converted the c++ 
 GDC 2006 2D Physics demo to D.
 
 Original:
 http://www.gphysics.com/archives/18
 
 D Version: 
 http://www.dsource.org/projects/arcgames/browser/trunk/physics
demo.zip?format=raw 



Could you please put some sort of descriptive page about it on dsource 
so one can see what it is without needing to download and unzip it?


 It also comes with a public domain red black tree implementation that 
 seems to work. The author of 
 http://eternallyconfuzzled.com/tuts/redblack.html told me he is going to 
 add a license page that says all the code on his pages are in public 
 domain.



Thanks for taking care of this.
Oct 31 2006
parent reply clayasaurus <clayasaurus gmail.com> writes:
Walter Bright wrote:

 clayasaurus wrote:

 After quite a conversion process, I've successfully converted the c++ 
 GDC 2006 2D Physics demo to D.

 Original:
 http://www.gphysics.com/archives/18

 D Version: 
 http://www.dsource.org/projects/arcgames/browser/trunk/physics
demo.zip?format=raw 



 
 Could you please put some sort of descriptive page about it on dsource 
 so one can see what it is without needing to download and unzip it?
 



Here you go

http://svn.dsource.org/projects/arcgames/trunk/physics/html/index.html
Oct 31 2006
parent reply Walter Bright <newshound digitalmars.com> writes:
clayasaurus wrote:

 Walter Bright wrote:

 clayasaurus wrote:

 After quite a conversion process, I've successfully converted the c++ 
 GDC 2006 2D Physics demo to D.

 Original:
 http://www.gphysics.com/archives/18

 D Version: 
 http://www.dsource.org/projects/arcgames/browser/trunk/physics
demo.zip?format=raw 





 Could you please put some sort of descriptive page about it on dsource 
 so one can see what it is without needing to download and unzip it?



 Here you go
 
 http://svn.dsource.org/projects/arcgames/trunk/physics/html/index.html



That's a great start. But please include the links, the title, and the 
dscription you put in the original post!
Oct 31 2006
parent reply clayasaurus <clayasaurus gmail.com> writes:
Walter Bright wrote:

 clayasaurus wrote:

 Walter Bright wrote:

 clayasaurus wrote:

 After quite a conversion process, I've successfully converted the 
 c++ GDC 2006 2D Physics demo to D.

 Original:
 http://www.gphysics.com/archives/18

 D Version: 
 http://www.dsource.org/projects/arcgames/browser/trunk/physics
demo.zip?format=raw 






 Could you please put some sort of descriptive page about it on 
 dsource so one can see what it is without needing to download and 
 unzip it?



 Here you go

 http://svn.dsource.org/projects/arcgames/trunk/physics/html/index.html



 That's a great start. But please include the links, the title, and the 
 dscription you put in the original post!



Done.

~ Clay
Oct 31 2006
parent Walter Bright <newshound digitalmars.com> writes:
clayasaurus wrote:

 Walter Bright wrote:

 clayasaurus wrote:

 Here you go

 http://svn.dsource.org/projects/arcgames/trunk/physics/html/index.html



 That's a great start. But please include the links, the title, and the 
 dscription you put in the original post!



 Done.
 
 ~ Clay



Much better!
Oct 31 2006