C++ AnimationState类代码示例

//-------------------------------------------------------------------------------------
void EntitySimple::playAnimation(Ogre::String name)
{
	if(modelName_ == "ogrehead.mesh")
		return;

	if(name != "Die" && mState == 1)
		name = "Die";

	AnimationState* astate = NULL;
	bool loopplay = true;

	if(name == "Idle")
	{
		srand((unsigned)time(NULL));

		if(mState == 3)
			astate = mAnims[ANIM_BATTLEIDLE1 + (rand() % 1)];
		else
			astate = mAnims[ANIM_IDLE_1 + (rand() % 1)];

		assert(mState != 1);
	}
	else if(name == "Die")
	{
		if(mLastAnimName == name)
			return;

		srand((unsigned)time(NULL));
		astate = mAnims[ANIM_DIE1 + (rand() % 1)];
		loopplay = false;
	}
	else if(name == "Attack")
	{
		srand((unsigned)time(NULL));
		int attackID = ANIM_ATTACK1 + (rand() % 4);
		astate = mAnims[attackID];
	}
	else
	{
		if(mLastAnimName == name)
			return;

		for (int i = 0; i < SIMPLE_NUM_ANIMS; i++)
		{
			if(name == animNames[i])
			{
				astate = mAnims[i];
				break;
			}
		}
	}
	
	if(astate == NULL)
		return;

	if(mLastAnims)
		mLastAnims->setEnabled(false);

	mLastAnimName = name;
	astate->setLoop(loopplay);
	astate->setEnabled(true);
	mLastAnims = astate;
}

void AnimationController::Update(float timeStep)
{
    // Loop through animations
    for (unsigned i = 0; i < animations_.Size();)
    {
        AnimationControl& ctrl = animations_[i];
        AnimationState* state = GetAnimationState(ctrl.hash_);
        bool remove = false;

        if (!state)
            remove = true;
        else
        {
            // Advance the animation
            if (ctrl.speed_ != 0.0f)
                state->AddTime(ctrl.speed_ * timeStep);

            float targetWeight = ctrl.targetWeight_;
            float fadeTime = ctrl.fadeTime_;

            // If non-looped animation at the end, activate autofade as applicable
            if (!state->IsLooped() && state->GetTime() >= state->GetLength() && ctrl.autoFadeTime_ > 0.0f)
            {
                targetWeight = 0.0f;
                fadeTime = ctrl.autoFadeTime_;
            }

            // Process weight fade
            float currentWeight = state->GetWeight();
            if (currentWeight != targetWeight)
            {
                if (fadeTime > 0.0f)
                {
                    float weightDelta = 1.0f / fadeTime * timeStep;
                    if (currentWeight < targetWeight)
                        currentWeight = Min(currentWeight + weightDelta, targetWeight);
                    else if (currentWeight > targetWeight)
                        currentWeight = Max(currentWeight - weightDelta, targetWeight);
                    state->SetWeight(currentWeight);
                }
                else
                    state->SetWeight(targetWeight);
            }

            // Remove if weight zero and target weight zero
            if (state->GetWeight() == 0.0f && (targetWeight == 0.0f || fadeTime == 0.0f) && ctrl.removeOnCompletion_)
                remove = true;
        }

        // Decrement the command time-to-live values
        if (ctrl.setTimeTtl_ > 0.0f)
            ctrl.setTimeTtl_ = Max(ctrl.setTimeTtl_ - timeStep, 0.0f);
        if (ctrl.setWeightTtl_ > 0.0f)
            ctrl.setWeightTtl_ = Max(ctrl.setWeightTtl_ - timeStep, 0.0f);

        if (remove)
        {
            if (state)
                RemoveAnimationState(state);
            animations_.Erase(i);
            MarkNetworkUpdate();
        }
        else
            ++i;
    }

    // Node hierarchy animations need to be applied manually
    for (Vector<SharedPtr<AnimationState> >::Iterator i = nodeAnimationStates_.Begin(); i != nodeAnimationStates_.End(); ++i)
        (*i)->Apply();
}

void SkeletalAnimation::CreateScene()
{
    ResourceCache* cache = GetSubsystem<ResourceCache>();

    scene_ = new Scene(context_);

    // Create octree, use default volume (-1000, -1000, -1000) to (1000, 1000, 1000)
    // Also create a DebugRenderer component so that we can draw debug geometry
    scene_->CreateComponent<Octree>();
    scene_->CreateComponent<DebugRenderer>();

    // Create scene node & StaticModel component for showing a static plane
    Node* planeNode = scene_->CreateChild("Plane");
    planeNode->SetScale(Vector3(100.0f, 1.0f, 100.0f));
    StaticModel* planeObject = planeNode->CreateComponent<StaticModel>();
    planeObject->SetModel(cache->GetResource<Model>("Models/Plane.mdl"));
    planeObject->SetMaterial(cache->GetResource<Material>("Materials/StoneTiled.xml"));

    // Create a Zone component for ambient lighting & fog control
    Node* zoneNode = scene_->CreateChild("Zone");
    Zone* zone = zoneNode->CreateComponent<Zone>();
    zone->SetBoundingBox(BoundingBox(-1000.0f, 1000.0f));
    zone->SetAmbientColor(Color(0.15f, 0.15f, 0.15f));
    zone->SetFogColor(Color(0.5f, 0.5f, 0.7f));
    zone->SetFogStart(100.0f);
    zone->SetFogEnd(300.0f);

    // Create a directional light to the world. Enable cascaded shadows on it
    Node* lightNode = scene_->CreateChild("DirectionalLight");
    lightNode->SetDirection(Vector3(0.6f, -1.0f, 0.8f));
    Light* light = lightNode->CreateComponent<Light>();
    light->SetLightType(LIGHT_DIRECTIONAL);
    light->SetCastShadows(true);
    light->SetShadowBias(BiasParameters(0.00025f, 0.5f));
    // Set cascade splits at 10, 50 and 200 world units, fade shadows out at 80% of maximum shadow distance
    light->SetShadowCascade(CascadeParameters(10.0f, 50.0f, 200.0f, 0.0f, 0.8f));

    // Create animated models
    const unsigned NUM_MODELS = 100;
    const float MODEL_MOVE_SPEED = 2.0f;
    const float MODEL_ROTATE_SPEED = 100.0f;
    const BoundingBox bounds(Vector3(-47.0f, 0.0f, -47.0f), Vector3(47.0f, 0.0f, 47.0f));

    for (unsigned i = 0; i < NUM_MODELS; ++i)
    {
        Node* modelNode = scene_->CreateChild("Jack");
        modelNode->SetPosition(Vector3(Random(90.0f) - 45.0f, 0.0f, Random(90.0f) - 45.0f));
        modelNode->SetRotation(Quaternion(0.0f, Random(360.0f), 0.0f));
        AnimatedModel* modelObject = modelNode->CreateComponent<AnimatedModel>();
        modelObject->SetModel(cache->GetResource<Model>("Models/Jack.mdl"));
        modelObject->SetMaterial(cache->GetResource<Material>("Materials/Jack.xml"));
        modelObject->SetCastShadows(true);

        // Create an AnimationState for a walk animation. Its time position will need to be manually updated to advance the
        // animation, The alternative would be to use an AnimationController component which updates the animation automatically,
        // but we need to update the model's position manually in any case
        Animation* walkAnimation = cache->GetResource<Animation>("Models/Jack_Walk.ani");
        AnimationState* state = modelObject->AddAnimationState(walkAnimation);
        // The state would fail to create (return null) if the animation was not found
        if (state)
        {
            // Enable full blending weight and looping
            state->SetWeight(1.0f);
            state->SetLooped(true);
            state->SetTime(Random(walkAnimation->GetLength()));
        }

        // Create our custom Mover component that will move & animate the model during each frame's update
        Mover* mover = modelNode->CreateComponent<Mover>();
        mover->SetParameters(MODEL_MOVE_SPEED, MODEL_ROTATE_SPEED, bounds);
    }

    // Create the camera. Limit far clip distance to match the fog
    cameraNode_ = scene_->CreateChild("Camera");
    Camera* camera = cameraNode_->CreateComponent<Camera>();
    camera->SetFarClip(300.0f);

    // Set an initial position for the camera scene node above the plane
    cameraNode_->SetPosition(Vector3(0.0f, 5.0f, 0.0f));
}

void AnimationController::SetNetAnimationsAttr(const PODVector<unsigned char>& value)
{
    MemoryBuffer buf(value);

    AnimatedModel* model = GetComponent<AnimatedModel>();

    // Check which animations we need to remove
    HashSet<StringHash> processedAnimations;

    unsigned numAnimations = buf.ReadVLE();
    while (numAnimations--)
    {
        String animName = buf.ReadString();
        StringHash animHash(animName);
        processedAnimations.Insert(animHash);

        // Check if the animation state exists. If not, add new
        AnimationState* state = GetAnimationState(animHash);
        if (!state)
        {
            Animation* newAnimation = GetSubsystem<ResourceCache>()->GetResource<Animation>(animName);
            state = AddAnimationState(newAnimation);
            if (!state)
            {
                URHO3D_LOGERROR("Animation update applying aborted due to unknown animation");
                return;
            }
        }
        // Check if the internal control structure exists. If not, add new
        unsigned index;
        for (index = 0; index < animations_.Size(); ++index)
        {
            if (animations_[index].hash_ == animHash)
                break;
        }
        if (index == animations_.Size())
        {
            AnimationControl newControl;
            newControl.name_ = animName;
            newControl.hash_ = animHash;
            animations_.Push(newControl);
        }

        unsigned char ctrl = buf.ReadUByte();
        state->SetLayer(buf.ReadUByte());
        state->SetLooped((ctrl & CTRL_LOOPED) != 0);
        state->SetBlendMode((ctrl & CTRL_ADDITIVE) != 0 ? ABM_ADDITIVE : ABM_LERP);
        animations_[index].speed_ = (float)buf.ReadShort() / 2048.0f; // 11 bits of decimal precision, max. 16x playback speed
        animations_[index].targetWeight_ = (float)buf.ReadUByte() / 255.0f; // 8 bits of decimal precision
        animations_[index].fadeTime_ = (float)buf.ReadUByte() / 64.0f; // 6 bits of decimal precision, max. 4 seconds fade
        if (ctrl & CTRL_STARTBONE)
        {
            StringHash boneHash = buf.ReadStringHash();
            if (model)
                state->SetStartBone(model->GetSkeleton().GetBone(boneHash));
        }
        else
            state->SetStartBone(0);
        if (ctrl & CTRL_AUTOFADE)
            animations_[index].autoFadeTime_ = (float)buf.ReadUByte() / 64.0f; // 6 bits of decimal precision, max. 4 seconds fade
        else
            animations_[index].autoFadeTime_ = 0.0f;
        
        animations_[index].removeOnCompletion_ = (ctrl & CTRL_REMOVEONCOMPLETION) != 0;
        
        if (ctrl & CTRL_SETTIME)
        {
            unsigned char setTimeRev = buf.ReadUByte();
            unsigned short setTime = buf.ReadUShort();
            // Apply set time command only if revision differs
            if (setTimeRev != animations_[index].setTimeRev_)
            {
                state->SetTime(((float)setTime / 65535.0f) * state->GetLength());
                animations_[index].setTimeRev_ = setTimeRev;
            }
        }
        if (ctrl & CTRL_SETWEIGHT)
        {
            unsigned char setWeightRev = buf.ReadUByte();
            unsigned char setWeight = buf.ReadUByte();
            // Apply set weight command only if revision differs
            if (setWeightRev != animations_[index].setWeightRev_)
            {
                state->SetWeight((float)setWeight / 255.0f);
                animations_[index].setWeightRev_ = setWeightRev;
            }
        }
    }

    // Set any extra animations to fade out
    for (Vector<AnimationControl>::Iterator i = animations_.Begin(); i != animations_.End(); ++i)
    {
        if (!processedAnimations.Contains(i->hash_))
        {
            i->targetWeight_ = 0.0f;
            i->fadeTime_ = EXTRA_ANIM_FADEOUT_TIME;
        }
    }
}