public IEnumerator QuaternionIntervalSnapping()
{
// Make a copy of the default quaternion elastic extent.
var snappingExtent = quatExtent;
// Set some decent snap points
snappingExtent.SnapPoints = new Vector3[]
{
new Vector3(10, 10, 10)
};
// Set a good snap radius.
snappingExtent.SnapRadius = 5f;
// Enable interval snapping.
snappingExtent.RepeatSnapPoints = true;
// Construct our system.
QuaternionElasticSystem les = new QuaternionElasticSystem(Quaternion.identity, Quaternion.identity, snappingExtent, elasticProperties);
// Loop over a range of negative and positive integer multiples of the snap interval.
for (int j = -3; j < 6; j++)
{
// Goal position for the elastic system to seek.
// We will let the system settle to right next to an integer multiple of the snap point.
var goalValue = Quaternion.Euler((snappingExtent.SnapPoints[0] * j) - (new Vector3(0.03f, 0.03f, 0.03f)));
// Let the elastic system come to an equilibrium.
// No need for yielding for new frames because the elastic system
// simulates independently from Unity's frame system.
for (int i = 0; i < 1000; i++)
{
les.ComputeIteration(goalValue, 0.05f);
}
// Get the equilibrium value from the system.
// It should be near the goal value, but slightly pulled towards the snapping point.
var equilibrium = les.GetCurrentValue();
Debug.Assert(
SignedVectorGreaterThan(equilibrium.eulerAngles, goalValue.eulerAngles),
$"Equilibrium should be slightly greater than goal value. Goal: {goalValue:F4}, Current: {equilibrium.eulerAngles:F4}"
);
Debug.Assert(
SignedVectorLessThan(equilibrium.eulerAngles, Vector3.one * 360.0f + snappingExtent.SnapPoints[0] * j),
$"Equilibrium should still be less than the snapping value."
);
}
yield return(null);
}
public IEnumerator QuaternionSnapPointSnapping()
{
// Make a copy of the default volume elastic extent.
var snappingExtent = quatExtent;
// Set some decent snap points
snappingExtent.SnapPoints = new Vector3[]
{
new Vector3(45.0f, 45.0f, 45.0f),
new Vector3(-45.0f, -45.0f, -45.0f)
};
// Construct our system.
QuaternionElasticSystem les = new QuaternionElasticSystem(Quaternion.identity, Quaternion.identity, snappingExtent, elasticProperties);
// Goal position for the elastic system to seek.
// We will let the system settle to right next to one of the snapping point.
var goalValue = Quaternion.Euler(new Vector3(40, 40, 40));
// Let the elastic system come to an equilibrium.
// No need for yielding for new frames because the elastic system
// simulates independently from Unity's frame system.
for (int i = 0; i < 1000; i++)
{
les.ComputeIteration(goalValue, 0.05f);
}
// Get the equilibrium value from the system.
// It should be near the goal value, but slightly pulled towards the snapping point.
var equilibrium = les.GetCurrentValue();
Debug.Assert(
SignedVectorGreaterThan(equilibrium.eulerAngles, goalValue.eulerAngles),
$"Equilibrium should be slightly greater than goal value. Goal: {goalValue.eulerAngles:F4}, Current: {equilibrium.eulerAngles:F4}"
);
Debug.Assert(
SignedVectorLessThan(equilibrium.eulerAngles, snappingExtent.SnapPoints[0]),
$"Equilibrium should still be less than the snapping value"
);
// Move the goal value to next to the other snapping point (-45,-45,-45)
goalValue = Quaternion.Euler(new Vector3(-35, -35, -35));
// Let the elastic system come to an equilibrium.
for (int i = 0; i < 1000; i++)
{
les.ComputeIteration(goalValue, 0.05f);
}
// Get the equilibrium value from the system.
// It should be near the goal value, but slightly pulled towards the snapping point.
equilibrium = les.GetCurrentValue();
Debug.Assert(
SignedVectorLessThan(equilibrium.eulerAngles, goalValue.eulerAngles),
$"Equilibrium should be slightly less than goal value. Goal: {goalValue.eulerAngles:F4}, Current: {equilibrium.eulerAngles:F4}"
);
Debug.Assert(
SignedVectorGreaterThan(equilibrium.eulerAngles, snappingExtent.SnapPoints[0]),
$"Equilibrium should still be greater than the snapping value"
);
yield return(null);
}