Ammo.js Typed

This project provides the Ammo.js modules with typescript definitions.

Installation

Use npm or yarn to install this version of ammojs from npm

$ npm install ammojs-typed

or from github

$ npm install github:giniedp/ammojs-typed

Usage

Ammo as window global

Configure your tsconfig.json to lookup the ambient types

  "typeRoots": ["node_modules/ammojs-typed/ammo/ambient"]

Then at some point require ammo.js (depends on your build chain)

require('ammojs-typed')

or reference the script

<script src="./ammo.js">

And use the global Ammo object

Ammo().then(() => {
  new Ammo.btVector3(1, 2, 3)
})

Ammo as es6 module import

You probably need to set the following compilerOptions in tsconfig.json

  "allowSyntheticDefaultImports": true,
  "esModuleInterop": true

Then import ammo like this

import Ammo from 'ammojs-typed'

This works but be cautious here. The default import gives you the bootstrap function. After bootstrapping the api is not available through the Ammo symbol by default.

Ammo().then(api => {
  const v1 = new api.btVector3(1, 2, 3)
  const v2 = new Ammo.btVector3(1, 2, 3) // <-- runtime error here
})

You can work around that by booting like this

Ammo(Ammo).then(() => {
  const v2 = new Ammo.btVector3(1, 2, 3) // <-- works
})

Ammo as dynamic import

Enable same compilerOptions as above

import('./ammo.js')                        // use dynamic import
  .then((Module) => Module.default())      // bootstrap ammo.js
  .then((ammo) => {
    const v1 = new ammo.btVector3(1, 2, 3) // use ammo here
  })

Since typescript 3.8 you can use type only imports. So with dynamic imports you can safely import ammo.js types, without including them in you bundle like this

import type Ammo from './ammo.js'

import('./ammo.js')                        // use dynamic import
  .then((Module) => Module.default())      // bootstrap ammo.js
  .then((ammo) => {
    let v1: Ammo.btVector3 = null
    // ...
    v1 = v
  })

Generate .d.ts files

Clone this repository and install node dependencies

git clone [email protected]:giniedp/ammojs-typed.git
cd ammojs-typed
npm install

Place the ammo.idl and ammo.js into the ./ammo folder. To download the latest version from the ammo.js repository run

$ npm run download

Make your adjustments to the IDL file if needed (see below) and run

$ npm run generate

This will parse the ./ammo/ammo.idl and generate a ./ammo/ammo.d.ts as well as ./ammo/ambient/ammo.d.ts

Manual IDL adjustments

The btVector4 implements the shape of btVector3 which causes a signature mismatch of the setValue method which typescript complains about. Add the following to the btVector4

+void setValue(float x, float y, float z);

The btDbvtBroadphase should derive from btBroadphaseInterface

-interface btDbvtBroadphase {
+interface btDbvtBroadphase: btBroadphaseInterface {

References

• https://github.com/kripken/ammo.js/issues/233
• https://github.com/microsoft/TSJS-lib-generator
• https://github.com/osman-turan/ammo.js-typings
• https://ts-ast-viewer.com