Box2D Forums

Frank,

That's a clever idea. It works well for vertical stacks. The default pyramid test doesn't do as well. Perhaps you need to extend deferral to the position correction.

Ideally we would have a block solver that would solve the two contact points simultaneously. This would provide a symmetric result with no net torque and not be too strong. I scheduled a block solver awhile ago for 2.4.

Someone (Dirk) already implement a block solver in Box2D_Lite. If someone would like to implement this in 2.0, send me PM for the code.

I have the next installment of the fixed point implementation patch to include in the SVN code. The patch applies to Rev 132. Some of the fixes between 131 and 132 really helped the fixed point stuff!

At this point all of the joints work in the testbed. In fact, all of the demos work and react in pretty much the same way in the testbed as in the floating point code except that the pyramid takes about 30 seconds to settle versus a couple of seconds for the floating point and the shape editing demo still has an overflow due to the large mass of the shape. Pretty much all other overflows are gone. A few patches (provided) are required in the Testbed to handle fixed point stuff correctly.

I also fixed/updated the Makefiles.

At this point I am pretty happy with the performance, at least on my Linux box and my DS.

Building shared libraries and installing headers on linux. I use the attached patch to make Box2D trunk build and install to /usr/local on a debian machine.

The patch is against revision 139

A more complete autotooled build environment as well as installing a pkg-config file would probably be a better way to make it easy for distributions to package and include box2d. But this patch works for development prototyping purposes for now.

Somebody knows what compiler options to set in the actual box2d <Release> configuration in Microsoft Visual C++ 2005 ?


Thx, nimodo

The 2.0.1 project file should have C++ exceptions disabled.

Yes, this is correct, i checked twice, in all 5 projects, Enable C++ exceptions are set to no.
(I did not touch anything in the 2.0.1 download)
So this error must come from another external used MS library ? Maybe a graphics lib (opengl32,...) because HelloWorld links, and TestBed shows above error.
Is the problem only on my computer, did i miss maybe a compiler update ? Did others test the TestBed Release config ?