The source code will work for v2.3.0 of Box2D. Source code You can find the source code for all versions of b2dJson here: The Java version does not support non-human-readable floats, so all floating point numbers will be their ascii representation. writeToFile (myWorld, "myfile.json" ) Ĭurrently no consideration has been made for 64 bit.
If you do want to edit the files manually, you can set the b2dJson to use human readable values by passing true to the constructor like this: 1ī2dJson json ( true ) //enable human-readable floats This will 'paste' the fixture onto another body.Ĭustom properties will also be duplicated by this method.Īlthough the files produced by this utility are text files and are somewhat human-readable and occasionally it can be handy to delve in there and cut bits out, the intention is not to edit these files manually.īy default, floating point values are written to JSON as their hex string representation to perfectly preserve the floating point value, as opposed to writing an ascii representation which can be rounded off and must be parsed back into a float when loading. b2Body * carBody ī2dJson json b2Fixture * myFixture = json. Here is an example of setting each of these types in a body: The property types can be int, float, string, b2Vec2 or bool. You can add your own named properties to the main items: body, fixture, joint, world. It also contains the assignments which are most commonly used when starting a new project, so you can copy and paste it.
This increases performance, because the Javascript engine doesn't need to traverse the whole scope-chain when looking up your definitions.
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The code below demonstrates my recommendation how to write Javascript in general, because the global scope is not polluted. There is no way to import packages and classes in Javascript, so you have to use var assignments, if you don't want to use full addresses. You can find the documentation here: Īnyways, there are some differences which are documented on this page. For basic usage of Box2D, you should read the documentation of the original C++ version: īox2dWeb is organized the same way as Box2dFlash.
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