124 lines
3.6 KiB
C#
124 lines
3.6 KiB
C#
// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
|
|
|
|
using System;
|
|
using System.Collections;
|
|
using System.Collections.Generic;
|
|
|
|
namespace FlaxEngine
|
|
{
|
|
/// <summary>
|
|
/// Contains a collision information passed to the OnCollisionEnter/OnCollisionExit events.
|
|
/// </summary>
|
|
unsafe partial struct Collision : IEnumerable<ContactPoint>
|
|
{
|
|
private class ContactsEnumerator : IEnumerator<ContactPoint>
|
|
{
|
|
private Collision _c;
|
|
private int _index;
|
|
|
|
public ContactsEnumerator(ref Collision c)
|
|
{
|
|
_c = c;
|
|
_index = 0;
|
|
}
|
|
|
|
public bool MoveNext()
|
|
{
|
|
if (_index == _c.ContactsCount - 1)
|
|
return false;
|
|
_index++;
|
|
return true;
|
|
}
|
|
|
|
public void Reset()
|
|
{
|
|
_index = 0;
|
|
}
|
|
|
|
ContactPoint IEnumerator<ContactPoint>.Current
|
|
{
|
|
get
|
|
{
|
|
if (_index == _c.ContactsCount)
|
|
throw new InvalidOperationException("Enumeration ended.");
|
|
fixed (ContactPoint* ptr = &_c.Contacts0)
|
|
return ptr[_index];
|
|
}
|
|
}
|
|
|
|
public object Current
|
|
{
|
|
get
|
|
{
|
|
if (_index == _c.ContactsCount)
|
|
throw new InvalidOperationException("Enumeration ended.");
|
|
fixed (ContactPoint* ptr = &_c.Contacts0)
|
|
return ptr[_index];
|
|
}
|
|
}
|
|
|
|
public void Dispose()
|
|
{
|
|
_c = new Collision();
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// The contacts locations.
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// This property allocates an array of contact points.
|
|
/// </remarks>
|
|
public ContactPoint[] Contacts
|
|
{
|
|
get
|
|
{
|
|
var result = new ContactPoint[ContactsCount];
|
|
fixed (ContactPoint* ptr = &Contacts0)
|
|
{
|
|
for (int i = 0; i < ContactsCount; i++)
|
|
result[i] = ptr[i];
|
|
}
|
|
return result;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// The relative linear velocity of the two colliding objects.
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// Can be used to detect stronger collisions.
|
|
/// </remarks>
|
|
public Vector3 RelativeVelocity
|
|
{
|
|
get
|
|
{
|
|
Vector3.Subtract(ref ThisVelocity, ref OtherVelocity, out var result);
|
|
return result;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// The first collider (this instance). It may be null if this actor is not the <see cref="Collider"/> (eg. <see cref="Terrain"/>).
|
|
/// </summary>
|
|
public Collider ThisCollider => ThisActor as Collider;
|
|
|
|
/// <summary>
|
|
/// The second collider (other instance). It may be null if this actor is not the <see cref="Collider"/> (eg. <see cref="Terrain"/>).
|
|
/// </summary>
|
|
public Collider OtherCollider => OtherActor as Collider;
|
|
|
|
/// <inheritdoc />
|
|
IEnumerator<ContactPoint> IEnumerable<ContactPoint>.GetEnumerator()
|
|
{
|
|
return new ContactsEnumerator(ref this);
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
IEnumerator IEnumerable.GetEnumerator()
|
|
{
|
|
return new ContactsEnumerator(ref this);
|
|
}
|
|
}
|
|
}
|