public void ReadPosition_OutOfBoundsNegative()
{
//Create a SpringMassSystem with zero damping and stiffness.
//This should produce solution of constant velocity
SpringMassSystem sms = new SpringMassSystem(0.1, 0, 1, 0, 0, 0.1);
sms.SetInitialCondition(0, 1, 0); //should sit at x=1
//Update to t=1
sms.Update(1);
//check position at t=-2
Assert.IsNaN(sms.Position(-2));
}
public void ForwardSolveTime_viaConstructor()
{
//Create a SpringMassSystem with zero damping and stiffness.
//This should produce solution of constant velocity
SpringMassSystem sms = new SpringMassSystem(0.1, 0, 1, 0, 0, 0.2);
sms.SetInitialCondition(0, 1, 0); //should sit at x=1
//Update to t=1
sms.Update(1);
//check velocity at t=1.2
Assert.AreEqual(1, sms.Position(1.2), general_purpose_required_accuracy);
}
public void Update_reverse()
{
//Create a SpringMassSystem with zero damping and stiffness.
//This should produce solution of constant velocity
SpringMassSystem sms = new SpringMassSystem(0.1, 0, 1, 0, 0, 0.1);
sms.SetInitialCondition(0, 1, 0); //should sit at x=1
//Update to t=-1
sms.Update(-1);
//check position at t=0
Assert.AreEqual(1, sms.Position(0), general_purpose_required_accuracy);
}
public void Update_andCheckPosition_afterMoving()
{
//Create a SpringMassSystem with zero damping and stiffness.
//This should produce solution of constant velocity
SpringMassSystem sms = new SpringMassSystem(0.1, 0, 1, 0, 0, 0.1);
sms.SetInitialCondition(0, 1, 1); //should travel linearly in time
//Update to t=1
sms.Update(1);
//check velocity at t=1.
Assert.AreEqual(2, sms.Position(1), general_purpose_required_accuracy);
}
public void Update()
{
//Toggle view if requested
if (Input.GetKeyDown("h"))
{
ToggleVRView();
}
if (Input.GetKeyDown("space"))
{
if (started == 0)
{
started = 1;
InitializeSimulation();
}
else
{
pause = 1 - pause;
}
//sms.Mass = masss; //mass
//sms.Damping = friction; //friction .15f
//sms.Stiffness = stiffness; //spring stiffness
}
if (started == 1)
{
if (sms.Mass != masss)
{
sms.Mass = masss; //mass
}
if (sms.Damping != friction)
{
sms.Damping = friction; //friction .15f
}
if (sms.Stiffness != stiffness)
{
sms.Stiffness = stiffness; //spring stiffness
}
}
if (started == 1 && pause == 0)
{
time += .1f;
sms.Update(time);
//mx += velX;
velX = velX * .9f; // * ground friction
//Uncomment for sin movement
//mx = Mathf.Sin(time);
mx = System.Convert.ToSingle(sms.Position(time));
//Debug.Log(mx.ToString());
mass.transform.position = new Vector3(mx, my, mz);
spring.transform.position = new Vector3(mx / 2f - 2.5f, my, mz);
spring.transform.localScale = new Vector3(.05f, .05f, .05f - .035f * (mx - initialX + 2.5f));
float accel = mx - oldmx;
oldmx = mx;
for (int n = 0; n < numLines; n++)
{
//yCoord = Acceleration
//Updates the segY public variable in each Line GameObject
//Look at the line.cs script to see the segY variable
//and what it does.
instance[n].GetComponent <Line>().segY = accel * 20f;
}
if (Input.GetKeyDown("space"))
{
velX += .1f;
}
//Draw line at edge of updating segments
int count = instance[0].GetComponent <Line>().count;
//This is the blue line that visualizes the updating graph.
for (int i = 0; i < numLines; i++)
{
lineRenderer.SetPosition(i, new Vector3(
count * .1f - (float)numLines * .5f,
accel * 20f,
numLines * 0.5f * i));
}
}
}