ue4-中动画控制，利用conduit节点

分类于

Actor的动画状态可能有几种idle，run，walk，skill，而skill中由又有几种不同的技能动作，要做进步一控制，这里只是提供一种思路，利用动画蓝图里的 conduit 节点，减少大量重复性的 state（比如某一状态到n种技能状态的切换）。

先来看看总体的动画蓝图(Animation Blueprint)

1、先写个继承自 UAnimInstance 的基类 UMyAnimInstance

UMyAnimInstance.h

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#include "../CharTypes.h"
#include "../Skill/SkillTypes.h"
#include "MyAnimInstance.generated.h"

class AMyChar;
class USkillTemplate;
class UMyAnimInstance;

DECLARE_DELEGATE_OneParam(FStateNotify, CharState); 

UCLASS()
class UMyAnimInstance : public UAnimInstance
{
	GENERATED_BODY()

public:
	UMyAnimInstance();
	virtual ~UMyAnimInstance();

	UFUNCTION(BlueprintCallable, Category = "UMyAnimInstance")
		AMyChar* GetOwnerChar();

	virtual	void NativeUpdateAnimation(float DeltaSeconds) override;
public:
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "UMyAnimInstance")
		AMyChar*	mOwnerChar;
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "UMyAnimInstance")
		float		mSpeed;
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "UMyAnimInstance")
		CharState	mCharState; //控制角色动画的枚举
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "UMyAnimInstance")
		EAnimType	mAnimType; //各种技能动画的枚举，在技能状态下细分各种技能

	FStateNotify	mStateDlg;
};

UMyAnimInstance.cpp

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UMyAnimInstance::UMyAnimInstance()
{
	mOwnerChar = nullptr;
	mSpeed = 0.f;
	mCharState = CharState::IdleRun;
	mAnimType = EAnimType::None;

	mStateDlg.BindLambda([&](CharState _state)->void {
		mCharState = _state;
	});
}

UMyAnimInstance::~UMyAnimInstance()
{

}

AMyChar* UMyAnimInstance::GetOwnerChar()
{
	if (!mOwnerChar)
	{
		APawn* owner = TryGetPawnOwner();
		mOwnerChar = owner ? Cast<AMyChar>(owner) : nullptr;
	}
	return mOwnerChar;
}

void UMyAnimInstance::NativeUpdateAnimation(float DeltaSeconds)
{
	Super::NativeUpdateAnimation(DeltaSeconds);

	if (mOwnerChar == nullptr)
	{
		mOwnerChar = GetOwnerChar();
	}

	if (mOwnerChar != nullptr)
	{	//TODO: 待优化，不变时不需要去get
		mSpeed = mOwnerChar->GetVelocity().Size(); //设置速度

		USkillFunction* skillFunc = mOwnerChar->GetUsingSkill(); //正在使用的技能
		USkillTemplate* skillTemp = skillFunc != nullptr ? skillFunc->GetSkillTemplate() : nullptr;
		mAnimType = skillTemp != nullptr ? skillTemp->mAnimType : EAnimType::None; //设置动画类型
	}
}

2、创建个 蓝图对象 继承自 UMyAnimInstance

选择父类 MyAnimInstance，(u是命名规则被省去了)，选择 fbx 动画

3、动画蓝图的各种状态描述，只要是使用conduit这个节点

4、然后就可以通过这两个变量来控制动画

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CharState	mCharState;
EAnimType	mAnimType;

具体看上面的代码，在这个函数里

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void UMyAnimInstance::NativeUpdateAnimation(float DeltaSeconds)