API: Physics (r1)

This API is for Three.js Worlds with physics using the Physijs library. It has no Ancient Brain framework. Anything written in Three.js and Physijs should run using this API without change.

This API has the following features:

• Includes Three.js release 80.
  • See Three.js documentation.
• Includes the following libraries for loading 3D models:
  • OBJLoader
  • MTLLoader
  • TGALoader
• Includes Physics support with the Physijs library.
  • This uses the Physijs 2015 commit.
  • The previous uses a 2015 build of ammo.js.
  • You do not configure the Physijs.scripts.worker and Physijs.scripts.ammo parameters. These are built-in to point to the right files.
  • See Physijs documentation.
• Includes jQuery 1.12.4.
• Loads up lots of CSS - all the CSS used on the AB login pages. At the risk of conflict with user CSS. (Later APIs load up minimal CSS.)

• No Ancient Brain framework.
• World has to do everything. It has to make its own canvas. It has to do its own camera control.
• Run header on RHS. Many JS worlds use fixed small dimension canvas, which will go in top LHS. So this API puts run header on RHS.
• If World uses Minds, World author must call the Mind themselves:

   AB.mind.getAction ( state );  

---

Templates

• World with no Mind

• World with Mind
• Mind

ABWorld

This API defines a global variable called "ABWorld" with not much in it:

 

 ABWorld;                 // instance of class ABWorldClass  
 

 ABWorld.canvas;          // a variable to point to the canvas   		
 
 // When making a screenshot, Ancient Brain will search for the canvas.
 // If it cannot find the canvas, set this variable to point to it.
 
 
 ABWorld.fullwidth();     // return full width of window on desktop / screen on mobile 
 ABWorld.fullheight();    // return full height of window on desktop / screen on mobile

Custom renderer: preserveDrawingBuffer

In this API you make your own renderer.
Here is an important note to make sure your World can generate screenshots.

We need to allow runs to generate a World image screenshot from the canvas.
To allow this, the API sets the THREE.WebGLRenderer property "preserveDrawingBuffer" to true by default. The API takes care of this for you.
When you make your own renderer, you need to consider "preserveDrawingBuffer". If you create the renderer like the following, then your World cannot have a screenshot:

 
renderer = new THREE.WebGLRenderer ( { preserveDrawingBuffer: false } );

To solve this, you can make preserveDrawingBuffer always true, or make it true only on screenshot runs:

 

if ( AB.isScreenshotRun() )
	renderer = new THREE.WebGLRenderer ( { preserveDrawingBuffer : true } );
else                       
	renderer = new THREE.WebGLRenderer ( { preserveDrawingBuffer : false } );

Examples

Examples of Worlds that use this API: