Simulation2D class

A wrapper class that combines two simulations to create 2D motion.

Simulation2D allows you to specify separate physics simulations or curves for X and Y coordinates. Both coordinates must use the same type - either both PhysicsSimulation or both regular non-simulation Curve.

// Using physics simulations
final physics2D = Simulation2D(
  Spring.elegant, // X-axis uses elegant spring motion
  Spring.swift,   // Y-axis uses swift spring motion
);

// Using standard curves
final curves2D = Simulation2D(
  Curves.easeOut, // X-axis eases out
  Curves.easeIn,  // Y-axis eases in
);

When using physics simulations, the simulation provides additional methods for velocity and position calculations in 2D space.

Inheritance

Constructors

Simulation2D(Physics _x, Physics _y)
Creates a 2D simulation using separate simulations for x and y coordinates. Simulation2D allows you to specify separate physics simulations or curves for X and Y coordinates. Both coordinates must use the same type - either both PhysicsSimulation or both regular non-simulation Curve.
const

Properties

hashCode → int
The hash code for this object.
no setteroverride
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
samplingSeed → int
Returns a seed value used by generateSamples to seed a random number generator to avoid sample aliasing.
no setterinherited
xPhysics → Curve
Returns the physics simulation for the X axis.
no setter
yPhysics → Curve
Returns the physics simulation for the Y axis.
no setter

Methods

dx(double time) → Offset
Returns the velocity of the 2D simulation at the given time.
findInverse(double x) → double
Returns the parameter t that corresponds to the given x value of the spline.
inherited
generateSamples({double start = 0.0, double end = 1.0, double tolerance = 1e-10}) → Iterable<Curve2DSample>
Generates a list of samples with a recursive subdivision until a tolerance of tolerance is reached.
inherited
isDone(double time) → bool
Returns true if both simulations are done at the given time.
isPhysicsBased() → bool
Returns true if both simulations are physics-based, ie. both are of type PhysicsSimulation.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
override
transform(double t) → Offset
Returns the value of the curve at point t.
override
transformInternal(double t) → Offset
Returns the value of the curve at point t.
inherited
x(double time) → Offset
Returns the position of the 2D simulation at the given time.

Operators

operator ==(Object other) → bool
The equality operator.
override