public void Update(float dt, AccelFunc accelFunc)
{
var accel = accelFunc(this.position, this.velocity);
this.position += this.velocity * dt;
this.velocity += accel * dt;
}
void StartSpringDumper()
{
_accelFunc = AccelFuncSpringDumper;
_positionFunc = PositionFuncSpringDumper;
_energyFunc = EnergyFuncSpring;
ResetStates();
}
public void Set(Vector2 position, Vector2 velocity, float dt, AccelFunc accelFunc)
{
_prevPosition = position;
this.velocity = velocity;
var accel = accelFunc(position, velocity);
this.position = _prevPosition + (velocity * dt) + (accel * (0.5f * dt * dt));
}
public void Update(float dt, AccelFunc accelFunc)
{
this.position += (this.velocity * dt) + (_accel * (0.5f * dt * dt));
var newAccel = accelFunc(this.position, this.velocity); // 速度が近似なのでこの加速度計算の速度による項はウソ。
this.velocity += (_accel + newAccel) * (0.5f * dt);
_accel = newAccel;
}
public void Update(float dt, AccelFunc accelFunc)
{
var accel = accelFunc(this.position, this.velocity); // 速度が近似なのでこの加速度計算の速度による項はウソ。
var newPosition = (this.position * 2f) - _prevPosition + (accel * (dt * dt));
_prevPosition = this.position;
this.position = newPosition;
this.velocity = (this.position - _prevPosition) / dt; // この速度は近似値。正しい計算には次の位置が必要。
}
void StartSpringDumper()
{
var position = new Vector2(300f, 0f);
var velocity = Vector2.zero;
_accelFunc = AccelFuncSpringDumper;
_positionFunc = PositionFuncSpringDumper;
_energyFunc = EnergyFuncSpring;
_eulerState.Set(position, velocity, Time.fixedDeltaTime, _accelFunc);
_semiImplicitEulerState.Set(position, velocity, Time.fixedDeltaTime, _accelFunc);
_verletState.Set(position, velocity, Time.fixedDeltaTime, _accelFunc);
}
public void Set(Vector2 position, Vector2 velocity, float dt, AccelFunc accelFunc)
{
this.position = position;
this.velocity = velocity;
Update(dt, accelFunc);
}
public void Set(Vector2 position, Vector2 velocity, float dt, AccelFunc accelFunc)
{
this.position = position;
this.velocity = velocity;
_accel = accelFunc(position, velocity);
}
