ForceSimulation class
Force simulation for laying out network graphs.
Constructors
-
ForceSimulation({required List<
NetworkNode> nodes, required List<NetworkLink> links, double alpha = 1.0, double alphaMin = 0.001, double alphaDecay = 0.0228, double alphaTarget = 0, double velocityDecay = 0.4, List<Force> ? forces, void onTick()?, void onEnd()?}) -
ForceSimulation.withDefaults({required List<
NetworkNode> nodes, required List<NetworkLink> links, double centerX = 0, double centerY = 0, double chargeStrength = -30, double linkDistance = 30, void onTick()?, void onEnd()?}) -
Creates a simulation with default forces.
factory
Properties
- alpha ↔ double
-
Simulation alpha (temperature).
getter/setter pair
- alphaDecay ↔ double
-
Alpha decay rate per tick.
getter/setter pair
- alphaMin ↔ double
-
Minimum alpha before simulation stops.
getter/setter pair
- alphaTarget ↔ double
-
Target alpha for reheating.
getter/setter pair
-
forces
→ List<
Force> -
Forces applied to the simulation.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- isRunning → bool
-
Whether the simulation is currently running.
no setter
-
links
→ List<
NetworkLink> -
Links in the simulation.
final
-
nodes
→ List<
NetworkNode> -
Nodes in the simulation.
final
- onEnd ↔ void Function()?
-
Callback when simulation ends.
getter/setter pair
- onTick ↔ void Function()?
-
Callback when simulation ticks.
getter/setter pair
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- velocityDecay ↔ double
-
Velocity decay (friction).
getter/setter pair
Methods
-
addForce(
Force force) → void - Adds a force to the simulation.
-
findNode(
double x, double y, {double radius = double.infinity}) → NetworkNode? - Finds the node closest to a point.
-
getNode(
String id) → NetworkNode? - Gets a node by ID.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
removeForce(
Force force) → void - Removes a force from the simulation.
-
restart(
) → void - Reheats the simulation.
-
start(
) → void - Starts the simulation.
-
stop(
) → void - Stops the simulation.
-
tick(
) → void - Runs a single tick of the simulation.
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited