如何使用Three.js定位Blender动画导出

Question

我已经使用Three.js导出实用程序从Blender成功导出动画，并可以将其添加到Three.js场景：

http://jsfiddle.net/frogt/6HxRP/1/

但是，一旦我将对象添加到我的场景中，我似乎无法手动定位它。 这是我用来从Blender导出创建网格和动画的代码：

var callback = function (geometry, materials) {

        var skinnedMesh = new THREE.Mesh(geometry, new THREE.MeshPhongMaterial({
            color: 'green'
        }));
        skinnedMesh.receiveShadow = true;

        THREE.AnimationHandler.add(skinnedMesh.geometry.animation);

        var animation = new THREE.Animation(skinnedMesh,
                "ArmatureAction",
                THREE.AnimationHandler.CATMULLROM
        );

        animation.interpolationType = THREE.AnimationHandler.CATMULLROM_FORWARD;

        // This positioning doesn't work....
        skinnedMesh.position.y = 50;
        skinnedMesh.position.x = 50;
        skinnedMesh.position.z = 50;

        animation.play();

        scene.add(skinnedMesh);

    };

这是Blender导出中的动画：

"animation": {
    "name": "ArmatureAction",
    "fps": 24,
    "length": 4.125,
    "hierarchy": [{
        "parent": -1,
        "keys": [{
            "time": 0,
            "pos": [0, -0.998347, -0],
            "rot": [0, 0, -0, 1],
            "scl": [1, 1, 1]
        }, {
            "time": 2,
            "pos": [0, 3.92237, -0],
            "rot": [0, 0, -0, 1]
        }, {
            "time": 4.125,
            "pos": [0, -0.667432, 1.77636e-15],
            "rot": [0, 0, -0, 1],
            "scl": [1, 1, 1]
        }]
    }]

动画的位置似乎被锁定到导出动画中的“pos”数组。

我的问题是：一旦添加到我的Three.js场景，我怎样才能手动定位（和移动）动画？

我使用的是Three.js r67

Answer 1

我设法通过修改Three.js源找到了解决方案。 我更换了THREE.Animation.prototype.update（）方法

vector.x = vector.x + ( currentPoint[ 0 ] - vector.x ) * proportionalWeight;
vector.y = vector.y + ( currentPoint[ 1 ] - vector.y ) * proportionalWeight;
vector.z = vector.z + ( currentPoint[ 2 ] - vector.z ) * proportionalWeight;

同

var xOrig = this.root.position.x;
var yOrig = this.root.position.y;
var zOrig = this.root.position.z;

vector.x = (vector.x + ( currentPoint[ 0 ] - vector.x ) * proportionalWeight) + xOrig;
vector.y = (vector.y + ( currentPoint[ 1 ] - vector.y ) * proportionalWeight);
vector.z = (vector.z + ( currentPoint[ 2 ] - vector.z ) * proportionalWeight) + zOrig;

这仅适用于X轴和Z轴，这是我特定应用所需的全部内容。 但是，这似乎不是解决问题的“正确”方法。