CreateScene.cpp

bool CreateScene(FbxManager* /*pSdkManager*/, FbxScene* pScene) //pSdkManageerは使用されません
{
    int i;
    FbxTime lTime;
    FbxAnimCurveKey key;
    FbxAnimCurve* lCurve = NULL;

    // 一つ目のアニメーションの部品を作成
    FbxAnimStack* lAnimStack = FbxAnimStack::Create(pScene, "Stack001");

    // 0秒から1秒までの間のみに制限されます
    lAnimStack->LocalStop = FBXSDK_TIME_ONE_SECOND;
    lAnimStack->Description = "This is the animation stack description field.";

    // アニメーションの部品、少なくともレイヤーは必要です。
    FbxAnimLayer* lAnimLayer = FbxAnimLayer::Create(pScene, "Base Layer");	// the AnimLayer object name is "Base Layer"
    lAnimStack->AddMember(lAnimLayer);											// add the layer to the stack

    // Set and get the blend mode bypass of the layer
    bool val;
    lAnimLayer->SetBlendModeBypass(eFbxTypeCount, true);       // set the bypass to all the datatypes.
    val = lAnimLayer->GetBlendModeBypass(eFbxBool);           // val = true
    lAnimLayer->SetBlendModeBypass(eFbxBool, false);          // overwrite just for the bool datatype.
    val = lAnimLayer->GetBlendModeBypass(eFbxBool);           // val = false
    val = lAnimLayer->GetBlendModeBypass(eFbxChar);           // val = true
    val = lAnimLayer->GetBlendModeBypass(eFbxDateTime);        // val = true
    val = lAnimLayer->GetBlendModeBypass((EFbxType)-1);     // invalid type, val = false
    val = lAnimLayer->GetBlendModeBypass((EFbxType)120);    // invalid type (>MAX_TYPES), val = false


    // we want to animate the layer's weight property.レイヤーのウェイトのプロパティを描画したい場合
    FbxAnimCurveNode* wcn = lAnimLayer->CreateCurveNode(lAnimLayer->Weight);
    if (wcn)
    {
        // the curve node from the Weight property already contains 1 channel (Weight).
        i = wcn->GetChannelsCount();                            // i = 1

        // Now, let's add a second channel to the animation node. Note that this code
        // is useless and has only been provided to show the usage of the AddChannel and
        // ResetChannels
        bool ret;
        ret = wcn->AddChannel<int>("MyAddedIntChannel", 99);    // this call will succed
        i = wcn->GetChannelsCount();                            // i = 2
        ret = wcn->AddChannel<int>("MyAddedIntChannel", 10);    // this call will fail, since the channel already exists.
        i = wcn->GetChannelsCount();                            // i = 2
        wcn->ResetChannels();                                   // remove any added channels
        i = wcn->GetChannelsCount();                            // i = 1
    }

    // get the Weight curve (and create it if it does not exist, wich is the case!)
    lCurve = lAnimLayer->Weight.GetCurve(lAnimLayer, true);
    if (lCurve)
    {
        // add two keys at time 0 sec and 1 sec with values 0 and 100 respectively.
        lCurve->KeyModifyBegin();
        for (i = 0; i < 2; i++)
        {
            lTime.SetSecondDouble((float)i);
            key.Set(lTime, i*100.0f);
            lCurve->KeyAdd(lTime, key);
        }
        lCurve->KeyModifyEnd();
    }

    //
    // now create a 3 components curvenode and animate two of the three channels.
    //
    // first, we need a "dummy" property so we can call the CreateTypedCurveNode
    FbxProperty p = FbxProperty::Create(pScene, FbxDouble3DT, "Vector3Property");
    p.Set(FbxDouble3(1.1, 2.2, 3.3));
    FbxAnimCurveNode* lCurveNode = FbxAnimCurveNode::CreateTypedCurveNode(p, pScene);

    // let's make sure the curveNode is added to the animation layer.
    lAnimLayer->AddMember(lCurveNode);

    // and to the "Vector3Property" since CreateTypedCurveNode does not make any connection
    p.ConnectSrcObject(lCurveNode);
    
	//Example of channel get value:
    //double v1 = lCurveNode->GetChannelValue<double>(0U, 0.0);   // v1 = 1.1
    //float  v2 = lCurveNode->GetChannelValue<float> (1U, 0.0f);  // v2 = 2.2
    //int    v3 = lCurveNode->GetChannelValue<int>   (2U, 0);     // v3 = 3

    //
    // create two free curves (not connected to anything)
    //

    // 最初のカーブ
    lCurve = FbxAnimCurve::Create(pScene, "curve1");
    if (lCurve)
    {
        // add two keys at time 0 sec and 1 sec with values 0 and 10 respectively.
        lCurve->KeyModifyBegin();
        for (i = 0; i < 2; i++)
        {
            lTime.SetSecondDouble((float)i);
            key.Set(lTime, i*10.0f);
            lCurve->KeyAdd(lTime, key);
        }
        lCurve->KeyModifyEnd();
    }

    // 次のチャンネルに接続
    lCurveNode->ConnectToChannel(lCurve, 1);

    // 次のカーブ
    lCurve = FbxAnimCurve::Create(pScene, "curve2");
    if (lCurve)
    {
        // add three keys at time 1, 2 and 3 sec with values 3.33, 6.66 and 9.99 respectively
        lCurve->KeyModifyBegin();
        for (i = 1; i < 4; i++)
        {
            lTime.SetSecondDouble((float)i);
            key.Set(lTime, i*3.33f);
            lCurve->KeyAdd(lTime, key);
        }
        lCurve->KeyModifyEnd();
    }
    // 三番目のチャンネルに接続
    lCurveNode->ConnectToChannel(lCurve, "Z"); // for backward compatibility, string identifier are still 
    // allowed for the X,Y,Z and W components or "0", "1", ... "9", "A", "B", ... "F" for the Matrix44 datatype

    
    // ======================================================================
    //
    // FbxAnimEvaluatorを使用して次のアニメーションレイヤーを追加して評価
    //
    // ======================================================================
    lAnimLayer = FbxAnimLayer::Create(pScene, "Layer2"); 
    lAnimStack->AddMember(lAnimLayer);  

    // get the number of animation layers in the stack
    // int nbLayers = lAnimStack->GetMemberCount<FbxAnimLayer>();  // nblayers = 2
    lAnimLayer = lAnimStack->GetMember<FbxAnimLayer>(1);      // get the second layer

    // set its blend mode to Additive
    lAnimLayer->BlendMode.Set(FbxAnimLayer::eBlendAdditive);

    // Now, let's animate the first channel of the "Vector3Property" (remember, we animated the second and
    // third ones on the base layer - when we connected "curve1" and "curve2" on lCurveNode above)
    // but first, make sure the property is animatable otherwise the creation of the curveNode is prohibited.
    p.ModifyFlag(FbxPropertyFlags::eAnimatable, true);
    lCurveNode = p.GetCurveNode(lAnimLayer, true); // create it since it does not exist yet

    // use "curve2" to animate it on channel 0
    lCurveNode->ConnectToChannel(lCurve, 0U);

    // and set the other two channels values
    lCurveNode->SetChannelValue<double>(1U, 5.0);
    lCurveNode->SetChannelValue<double>(2U, 0.0);

    // evaluate the "Vector3Property" value at three different times
    // with the use of the FbxAnimEvaluator so we take into account the two layers

    // make sure the evaluator is using the correct context (context == animstack)
    pScene->SetCurrentAnimationStack(lAnimStack);
    for (i = 0; i < 3; i++)
    {
        lTime.SetSecondDouble((float)i);
		FbxDouble3 val = p.EvaluateValue<FbxDouble3>(lTime);
    }

    /* 
       基本となるレイヤーはウェイトカーブを持ちます:

              時間     |     0       |       1        |      2       |
        Weight         +-------------+----------------+--------------| 
           Base Layer  |     0.0     |     100.0%     |    (100.0%)  | 
           Layer2      |   <100.0%>  |    <100.0%>    |    <100.0%>  |
                       +-------------+----------------+--------------|
        
        () Querying values outside the first and/or last keys in a curve will return
           the first/last key defined.
        <> Since it has never been set, it defaults to the multiplication neutral element (in percent).
        
        At the specified times each channel value on their respective layers is:

             時間     |     0       |       1        |      2       |
        Channel       +-------------+----------------+--------------|
            0  Base   |     0*      |       1.1*     |    1.1*      |  
               Layer2 |    (3.33)   |      3.33      |    6.66      | (curve2)
                      +-------------+----------------+--------------|
            1  Base   |     0*      |      10.0*     |    (10.0)    | (curve1)
               Layer2 |    5.0      |       5.0      |     5.0      |
                      +-------------+----------------+--------------|
            2  Base   |     0*      |      3.3*      |    6.66*     | (curve2)
               Layer2 |    0.0      |      0.0       |    0.0       |
                      +-------------+----------------+--------------|

        * key (or property, if not animated) value multiplied by the weight.
        () same as value at time 1 since there is no key here.

        therefore, considering that the second animation layer's blend mode is set 
        to additive, the evaluated values for v at 0, 1 and 2 seconds are:
        
          time  |    0        |       1        |      2       |
       v        +-------------+----------------+--------------|
            0   |  3.33       |     4.43       |    7.76      |
            1   |  5.0        |    15.00       |   15.00      |
            2   |  0.0        |     3.33       |    6.66      |
                +-------------+----------------+--------------| 
    */          
    return true;
}