Upgrade Bullet to version 2.83.

I tried to carefully preserve all patches since the last upgrade.

Improves T47195, cloth collision detection bug.

Differential Revision: https://developer.blender.org/D1739

1 files changed, 34 insertions, 10 deletions

diff --git a/extern/bullet2/src/BulletCollision/CollisionDispatch/btCollisionObject.h b/extern/bullet2/src/BulletCollision/CollisionDispatch/btCollisionObject.h
index 89cad168210..c68402418f7 100644
--- a/extern/bullet2/src/BulletCollision/CollisionDispatch/btCollisionObject.h
+++ b/extern/bullet2/src/BulletCollision/CollisionDispatch/btCollisionObject.h
@@ -92,11 +92,10 @@ protected:
 	int				m_internalType;
 
 	///users can point to their objects, m_userPointer is not used by Bullet, see setUserPointer/getUserPointer
-	union
-	{
-		void*			m_userObjectPointer;
-		int	m_userIndex;
-	};
+
+    void*			m_userObjectPointer;
+    
+    int	m_userIndex;
 
 	///time of impact calculation
 	btScalar		m_hitFraction; 
@@ -110,13 +109,11 @@ protected:
 	/// If some object should have elaborate collision filtering by sub-classes
 	int			m_checkCollideWith;
 
+	btAlignedObjectArray<const btCollisionObject*> m_objectsWithoutCollisionCheck;
+
 	///internal update revision number. It will be increased when the object changes. This allows some subsystems to perform lazy evaluation.
 	int			m_updateRevision;
 
-	virtual bool	checkCollideWithOverride(const btCollisionObject* /* co */) const
-	{
-		return true;
-	}
 
 public:
 
@@ -225,7 +222,34 @@ public:
 		return m_collisionShape;
 	}
 
-	
+	void	setIgnoreCollisionCheck(const btCollisionObject* co, bool ignoreCollisionCheck)
+	{
+		if (ignoreCollisionCheck)
+		{
+			//We don't check for duplicates. Is it ok to leave that up to the user of this API?
+			//int index = m_objectsWithoutCollisionCheck.findLinearSearch(co);
+			//if (index == m_objectsWithoutCollisionCheck.size())
+			//{
+			m_objectsWithoutCollisionCheck.push_back(co);
+			//}
+		}
+		else
+		{
+			m_objectsWithoutCollisionCheck.remove(co);
+		}
+		m_checkCollideWith = m_objectsWithoutCollisionCheck.size() > 0;
+	}
+
+	virtual bool	checkCollideWithOverride(const btCollisionObject*  co) const
+	{
+		int index = m_objectsWithoutCollisionCheck.findLinearSearch(co);
+		if (index < m_objectsWithoutCollisionCheck.size())
+		{
+			return false;
+		}
+		return true;
+	}
+