Material property providing physical attributes to a Shape.
Static methods
staticwood():Material
Predefined constructor for a wood style Material.
Returns:
new Material(0.4,0.2,0.38,0.7,0.005)staticsteel():Material
Predefined constructor for a steel style Material.
Returns:
new Material(0.2,0.57,0.74,7.8,0.001)staticice():Material
Predefined constructor for a ice style Material.
Returns:
new Material(0.3,0.03,0.1,0.9,0.0001)staticrubber():Material
Predefined constructor for a rubber style Material.
Returns:
new Material(0.8,1.0,1.4,1.5,0.01)Constructor
new(elasticity:Float = 0.0, dynamicFriction:Float = 1.0, staticFriction:Float = 2.0, density:Float = 1, rollingFriction:Float = 0.001)
Construct a new Material object.
Parameters:
elasticity | The coeffecient of elasticity for material. (default 0.0) |
|---|---|
dynamicFriction | The coeffecient of dynamic friction for material. (default 1.0) |
staticFriction | The coeffecient of static friction for material. (default 2.0) |
density | The density of the shape using this material in units of g/pixel/pixel. (default 1.0) |
rollingFriction | The coeffecient of rolling friction for material used in circle friction computations. (default 0.001) |
Returns:
The constructed Material object.
Variables
read onlyuserData:Dynamic<Dynamic>
Dynamic object for user to store additional data.
This object cannot be set, only its dynamically created
properties may be set. In AS3 the type of this property is *
This object will be lazily constructed so that until accessed
for the first time, will be null internally.
read onlyshapes:ShapeList
Set of all active shapes using this object.
Activeness of a shape in the sense that the Shape's Body is inside of a Space.
This list is immutable.
elasticity:Float
Elasticity of material.
This property may take any value. Coeffecients of elasticity are combined
by taking their average, and then clamping to the range [0,1]. In this way
you may give very large values (even infinites) to this property to bias
the result of combining elasticities.
A combined, clamped value of 0 results in no bouncing whatsoever.
A combine, clamped value of 1 results in complete elasticity where if
possible, the objects will not lose any energy at all.
dynamicFriction:Float
Coeffecient of dynamic friction for material.
This property may take any zero or positive value. Coeffecients of
dynamicFriction are combined by taking the square root of their product.
The higher this value the more quickly objects will slow down from speed
when sliding.
staticFriction:Float
Coeffecient of static friction for material.
This property may take any zero or positive value. Coeffecients of
staticFriction are combined by taking the square root of their product.
The higher this value the more quickly objects will come to rest once moving
very slowly, and the harder it will be to cause the objcet to begin to slide.
density:Float
Density of Shape's using this Material.
This property has units of g/pixel/pixel, not Kg/pixel/pixel for the
simple reason that we get more reasonable values like 1 instead of 0.001
to attain reasonable mass values for Bodys.
rollingFriction:Float
Coeffecient of rolling friction for circle interactions.
This property may take any zero or positive value. Coeffecients of
staticFriction are combined by taking the square root of their product.
The higher this value, the more quickly a rolling circle - which would
otherwise roll forever ignoring drag and numerical issues - will come to
rest.