// Simulates the frisbee with empirically based model in the z and y-axis, and simple constant velocity on the x-axis
void simulateFrisbee()
{
FrisbeeLocation cutoff = null;
int cutoffIndex = 0;
//Find a cutoff point where the frisbee is likely to still be in mid-flight
foreach (FrisbeeLocation loc in throwBuffer)
{
//cutoff default simulationBegin is 0.7 times the travel distance from throw start to throw end
if (loc.pos.z - throwBuffer[0].pos.z > simulationBegin * (throwBuffer[throwBuffer.Count - 1].pos.z - throwBuffer[0].pos.z))
{
cutoff = loc;
break;
}
cutoffIndex++;
}
if (cutoff != null)
{
//Calculate the velocities and angle to ground plane
FrisbeeLocation prevLoc = throwBuffer[cutoffIndex - 4];
double vz0 = (cutoff.pos.z - prevLoc.pos.z) / (cutoff.time - prevLoc.time);
double vy0 = (cutoff.pos.y - prevLoc.pos.y) / (cutoff.time - prevLoc.time);
double vx0 = (cutoff.pos.x - prevLoc.pos.x) / (cutoff.time - prevLoc.time);
Vector3 forwardDirection = cutoff.pos - prevLoc.pos;
forwardDirection.Normalize();
float pitch = Vector3.Angle(forwardDirection, Vector3.ProjectOnPlane(forwardDirection, Vector3.up));
//window of numerical integration is set to 0.001s
List <FrisbeeLocation> simulated = pred.simulate3D(cutoff.pos.x, cutoff.pos.y, cutoff.pos.z, vx0, vy0, vz0, pitch, 0.001F);
//debug
/*Debug.Log("Simulation len: " + simulated.Count);
* Debug.Log("ThrowBuffer len: " + throwBuffer.Count);
* Debug.Log("Cutoff and prev y-pos: " + cutoff.pos.y + " " + prevLoc.pos.y);
* Debug.Log("Cutoff and prevloc timestamps" + cutoff.time + " " + prevLoc.time);
* Debug.Log("Simulation parameters: " + cutoff.pos.y + " " + vz0 + " " + vy0 + " " + pitch);*/
simulationTrail.Create(simulated);
endingSpeedText.text = "Ending speed before simulation: " + cutoff.forwardSpeed.ToString("F1") + " m/s";
}
}
// called every frame
void Update()
{
//playback speed control
if (Input.GetKeyDown("g"))
{
if (speed >= 1.0F)
{
speed = 0.0F;
}
if (speed < 1.0F)
{
speed = speed + 0.25F;
}
}
// Copy throwbuffer from ThrowController
// Detects when we need to initialize
if ((throwController.InPlayback() || throwController.WaitingForThrow()) && !initPlayback)
{
throwBuffer = throwController.getThrowBuffer();
if (throwBuffer != null)
{
initPlayback = true;
transitioningToThrow = true;
frisbeeMeshRenderer.sharedMaterial = playMaterial;
// deprecated
//trail.Deactivate();
//Debug.Log("Detached trail!");
// Create actual trail of the throw in the beginning of playback loop
trail.Create(throwBuffer);
//Simulate the frisbee and create simulated trail
simulateFrisbee();
updateGreenPercentage();
}
//Debug.Log("Init playback!");
pauseUntil = Time.time + 1.5F; //Slight pause before starting playback
}
else if (throwController.Throwing())
{
if (transitioningToThrow)
{
transitioningToThrow = false;
trail.Reset(); // clear trail for new throw
simulationTrail.Reset(); // clear simulation trail
// deprecated previous implementation using Unity builtin Trail
//trail.Activate();
//Debug.Log("Attached trail!");
}
initPlayback = false;
frisbeeMeshRenderer.sharedMaterial = recMaterial;
frisbeeModel.transform.localRotation = throwController.getCurrentRot();
frisbeeModel.transform.localPosition = throwController.getCurrentPos();
}
else if (initPlayback && (Time.time > pauseUntil))
{
UpdatePositionFromList();
}
}