// Calculates the displacement required in order not to be in a world collider
private Vector3 ResolveCollisions(ref Vector3 playerVelocity)
{
// Get nearby colliders
Physics.OverlapSphereNonAlloc(transform.position, Radius + 0.1f,
_overlappingColliders, ~_excludedLayers);
var totalDisplacement = Vector3.zero;
var checkedColliderIndices = new HashSet <int>();
Vector3 velocityBeforeCrop = playerVelocity;
// If the player is intersecting with that environment collider, separate them
for (var i = 0; i < _overlappingColliders.Length; i++)
{
// Two player colliders shouldn't resolve collision with the same environment collider
if (checkedColliderIndices.Contains(i))
{
continue;
}
var envColl = _overlappingColliders[i];
// Skip empty slots
if (envColl == null)
{
continue;
}
Vector3 collisionNormal;
float collisionDistance;
if (Physics.ComputePenetration(
_collisionVolume, _collisionVolume.transform.position, _collisionVolume.transform.rotation,
envColl, envColl.transform.position, envColl.transform.rotation,
out collisionNormal, out collisionDistance))
{
// Ignore very small penetrations
// Required for standing still on slopes
// ... still far from perfect though
if (collisionDistance < 0.015)
{
continue;
}
checkedColliderIndices.Add(i);
// Get outta that collider!
totalDisplacement += collisionNormal * collisionDistance;
// Crop down the velocity component which is in the direction of penetration
playerVelocity -= Vector3.Project(playerVelocity, collisionNormal);
}
}
// It's better to be in a clean state in the next resolve call
for (var i = 0; i < _overlappingColliders.Length; i++)
{
_overlappingColliders[i] = null;
}
// Landing fx
if (totalDisplacement.magnitude > 0.0001 && // There is some displacement
Vector3.Dot(totalDisplacement.normalized, Gravity.Down) < -0.9f) // That displacement is against gravity
{
float verticalVelocity = Vector3.Dot(velocityBeforeCrop, Gravity.Down);
const float differentSfxVelocityLimit = 25f;
if (verticalVelocity > differentSfxVelocityLimit)
{
_sfx.LandFromHeight();
}
else
{
_sfx.Land();
}
}
return(totalDisplacement);
}