ksys/phys: Move Constraint stuff to a separate folder

src/KingSystem/ActorSystem/actPhysicsConstraints.cpp

@@ -1,5 +1,5 @@
 #include "KingSystem/ActorSystem/actPhysicsConstraints.h"
-#include "KingSystem/Physics/System/physConstraint.h"
+#include "KingSystem/Physics/Constraint/physConstraint.h"
 
 namespace ksys::act {
 

src/KingSystem/Physics/CMakeLists.txt

@@ -4,6 +4,9 @@ target_sources(uking PRIVATE
   Cloth/physClothResource.cpp
   Cloth/physClothResource.h
 
+  Constraint/physConstraint.cpp
+  Constraint/physConstraint.h
+
   Ragdoll/physRagdollConfig.cpp
   Ragdoll/physRagdollConfig.h
   Ragdoll/physRagdollControllerKeyList.h
@@ -102,8 +105,6 @@ target_sources(uking PRIVATE
   System/physCharacterControllerParam.h
   System/physCollisionInfo.cpp
   System/physCollisionInfo.h
-  System/physConstraint.cpp
-  System/physConstraint.h
   System/physContactInfoParam.cpp
   System/physContactInfoParam.h
   System/physContactLayerCollisionInfo.cpp

src/KingSystem/Physics/Constraint/physConstraint.cpp

@@ -1,10 +1,9 @@
-#include "KingSystem/Physics/System/physConstraint.h"
+#include "KingSystem/Physics/Constraint//physConstraint.h"
 
 namespace ksys::phys {
 
 void Constraint::destroy(Constraint* instance) {
-    if (instance)
-        delete instance;
+    delete instance;
 }
 
 }  // namespace ksys::phys