JavascriptGraphicsAPI

Cross thread communication from Physics and Networking to graphics

Objects are sent across the thread barrier to alter the current scene graph being displayed

Creating a new graphics object

{
 msg:"Create"
 id:"f47ac10b-58cc-4372-a567-0e02b2c3d479"
 pos:[1,2,3],
 vel:[.25,0,0],
 orient:[.5,0,0,.5]
 rotaxis:[0,0,1]
 rotvel:.25,
 parent:"c46ac00b-58cc-4372-a567-0e02b2c3d479"//<-- optional
}

Moving a graphics object

{
  msg:"Move"
  id:"f47ac10b-58cc-4372-a567-0e02b2c3d479"
  pos:[1,2,3],
  vel:[.25,0,0],
  orient:[.5,0,0,.5]
  rotaxis:[0,0,1]
  rotvel:.25,
  parent:"c46ac00b-58cc-4372-a567-0e02b2c3d479"//<-- optional
}

Adding/changing light property for an object

{
  msg:"Light"
  id:"f47ac10b-58cc-4372-a567-0e02b2c3d479"
  diffuse_color:[.25,.5,1],
  specular_color: [.2,1,.5],
  power=1.0: //exponent on the light
  ambient_color: [0,0,0],
  light_range: 1.0e5
  constant_falloff: 0.5,
  linear_falloff: 0.2,
  quadratic_falloff: 0.1,
  cone_inner_radians: 0,
  cone_outer_radians: 0,
  cone_falloff: 0.5,
  type: "POINT",//options include "SPOTLIGHT" or "DIRECTIONAL"
  casts_shadow: true
}

//This message is from a space to an object updating its position and orientation
//If sent in response to a LocRequest, the information must be valid.
{
timestamp: new Date().getTime(), // ????? Should we only use extrapolated positions
position: [1,2,3],
orientation: [.5,0,0,.867],
velocity: [1,1,1],
rotational_axis: [0,1,0],
angular_speed: 1.0,
forced_update: false, // if we do extrapolation

}

Destroying a graphics object

{
   msg:"Destroy"
   id:"f47ac10b-58cc-4372-a567-0e02b2c3d479"
}