Objects

Object

An Object (represented by h2d.Object) is the base class of all 2D objects, so any thing that you can see on the screen. Therefore h2d.Object provides variables like a position (x,y), a scale (scaleX,scaleY), a rotation and methods to change them. h2d.Objects can be any visual objects in the world of the game like for instance the player, enemies, buildings, but furthermore also buttons (h2d.Interactive) or a h2d.Flow that arranges UI elements and many more.

Object trees

Objects can be added to a scene (here h2d.Scene) directly or be added to another h2d.Object creating an object tree. The child objects will inherit the transformations of the parent object they have been added to. This means whenever the parent transforms (changing the position, rotating, making it transparent or invisible etc.) these transformations also apply to all the children that have been added to this parent object.

var a = new h2d.Object();              // object not added yet
s2d.addChild(a);                       // now adding `a` to `s2d` (the currently active 2D scene)

var b = new h2d.Object( s2d );         // `b` is added directly via constructor to `s2d`
b.x = 100;

var c = new h2d.Object( b );           // `c` is added to `b` which has been added to a scene (`s2d`)
c.x = 10;                              // relative to parent `b`

trace( c.getAbsPos().getPosition() );  // the absolute x-position of `c` will be 110, because it "travels" along with its parent `b`

h2d.Object is also documented in detail in the API.