80 replies to this topic

[them4n!ac]

3. 0.038849 (sin float) + 0.038351 (cos float) = 0.0772
0.055449 (tan float)
so, 0.055449 / 0.0772 = 0.71825 = 28% faster.
Similar result I told in previous post.

1. you forgot float division, that's a heavy cpu instruction too
2. GM uses doubles and converts them to floats for Direct3D, that is one of the reasons GM is slow.
3. you said:

It speeds up around 25% instead of using tan

quite different.
But at least you know how it is really, and that's good

btw, Box2D is easy to learn.
//somewhere
b2World* world;
//creation
world = new b2World( worldAABB, gravity, true );
//step
world.Step( timeDelta, iteration_count );

Edited by them4n!ac, 25 September 2008 - 02:37 PM.

[Billyro]

This is very good!
But I guess it would be very difficult to make a fighting game with this...
But fun to play with!

Edited by Billyro, 15 October 2008 - 06:54 AM.

[GearGOD]

GM uses doubles and converts them to floats for Direct3D, that is one of the reasons GM is slow

No it isn't. The cast is negligible.

[TheMagicNumber]

To use a double as a float in Delphi, I think you just need to round it.

I agree that someone should make a Dox2D DLL but it would be extraordinarily hard, Box2D would need to be rewritten or coded so well that it would work.

Box2D uses OOP and is static, it may be impossible to just wrap the functions unless you add more. The types prevent a lot too, you'd need to use an array and return index numbers. It gets hard.

It's easier to use Allegro (Graphics) with Box2D in C++.

[them4n!ac]

No it isn't. The cast is negligible.

oh, I said wrong. I just looked at the test results with my barely opened eyes..
I looked at one book now and did some tests, that's right, they are very fast.

Edited by them4n!ac, 18 October 2008 - 11:01 AM.

[coolsmile]

It just takes up a whole bunch of memory >_<
This is pretty interesting, I think it would be fun to create a dll from Box2D

[them4n!ac]

Ok ok, but let's not spam the topic. If someone tries to make something with Box2D, he will make another topic.

[heyufool1]

I realize that this is an old topic and i'm sorry for bringing it back, but i'm using this DLL right now, and sometimes doing the smallest change in code make the game come up with an error saying "unknown variable (global.)_002". I have the physx_start and everything but i don't know what's happening. Even when i change the code back to how it was i get the same error. Anyone know why? Thanks!

EDIT: I found out that even i declared global._002 in the create event of an object it still says that it's an unknown variable. So what could be causing this?
EDIT 2: I also just found that if i put the physx_start and the physx_world_set_gravity lines in the object that first causes the error it works. But i would still like to know why this is happening

Edited by heyufool1, 04 May 2009 - 02:25 AM.

[fhd]

Is there any update for GM7 ?

Edited by fhd, 20 August 2009 - 01:48 PM.

[posva]

i noticed that set_rotation make an unexpected error appear or an acces violation or freez game...
can you fix that?

[SerMSYS]

Make sure that World_Create returns a double so that it works in GM7

[posva]

im in GM6.1 ...

[wituz]

Your ridid_bodies.gmk does not work .. Unexpected error while running the game ..

[tomster1996]

Does this work in GM8?

[Keth]

Make sure that World_Create returns a double so that it works in GM7

Thanks. You saved me time
New version up supporting Gamemaker 7 and 8.

[Lbckf]

COMPILATION ERROR in code action
Error in code at line 2:
h = physx_body_create(x,y,density,SHAPE_BOX,32,32,0);
^
at position 6: Unknown function or script: physx_body_create

[Keth]

COMPILATION ERROR in code action
Error in code at line 2:
h = physx_body_create(x,y,density,SHAPE_BOX,32,32,0);
^
at position 6: Unknown function or script: physx_body_create

You need to install the GEX if you're using GM7 or GM8.

Edited by Keth, 05 May 2010 - 11:59 AM.

[Consoft]

Does this have support for concave bodies?

[Exylex]

I like this, physx_body_get_vspeed() is broken though.

Edited by Exylex, 24 May 2010 - 09:20 PM.

[Keth]

I like this, physx_body_get_vspeed() is broken though.

This is going to be fixed in the upcoming version.
Documentation video (progress of the engine so far): http://www.youtube.c...h?v=BIjSvkT8nKk
Stress test of fluid: http://www.youtube.c...h?v=yoV9N8Yw3pI
Follow progress on Twitter: http://twitter.com/GMODE_Physics

Edited by Keth, 06 June 2010 - 08:59 PM.