UE4 SetPhysicsLinearVelocity、AddForce區(qū)別

來源： 52vr | 責(zé)任編輯：傳說的落葉 | 發(fā)布時(shí)間： 2019-06-06 08:19 | 瀏覽量：

SetPhysicsAngularVelocity：用于旋轉(zhuǎn)物體。但官方文檔建議謹(jǐn)慎使用此接口，建議用 AddTorque或者AddImpulse

AddForce用法：

			 

			mesh->AddForce(FVector::RightVector * mesh->GetBodyInstance()->GetBodyMass() * 1000);  

https://answers.unrealengine.com/questions/290824/addforceaddimpulse-wont-work.html

修改Velocity：
一般動(dòng)畫藍(lán)圖中使用Velocity來判定當(dāng)前對(duì)象的移動(dòng)速度從而來判定是否播放跑步動(dòng)畫。AddForce并不會(huì)修改Velocity值，所以如果要移動(dòng)的同時(shí)來設(shè)置Velocity，需要手動(dòng)設(shè)置：

			 

			MyChar->GetCharacterMovement()->Velocity += FVector(0,0,20000);  

https://answers.unrealengine.com/questions/27069/addimpulse-or-addforce-on-character.html

注意，如果要使用SetPhysicsLinearVelocity()，需要將SetSimulatePhysics設(shè)置為true：

			 
			MyCharacter->GetMesh()->SetSimulatePhysics(true);  

			MyCharacter->GetMesh()->SetPhysicsLinearVelocity(FVector(100.f, 100.f, 100.f));

https://answers.unrealengine.com/questions/140978/how-to-set-a-initial-velocity.html

UPrimitiveComponent::AddForce
https://docs.unrealengine.com/latest/INT/API/Runtime/Engine/Components/UPrimitiveComponent/AddForce/index.html

UPrimitiveComponent::AddImpulse

https://docs.unrealengine.com/latest/INT/API/Runtime/Engine/Components/UPrimitiveComponent/AddImpulse/index.html

UPrimitiveComponent::SetPhysicsLinearVelocity

https://docs.unrealengine.com/latest/INT/API/Runtime/Engine/Components/UPrimitiveComponent/SetPhysicsLinearVelocity/index.html

UPrimitiveComponent::SetPhysicsAngularVelocity
https://docs.unrealengine.com/latest/INT/API/Runtime/Engine/Components/UPrimitiveComponent/SetPhysicsAngularVelocity/index.html