buildNodeHierarchy method

dynamic buildNodeHierarchy(dynamic nodeId, dynamic parentObject, dynamic json, dynamic parser,)

Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#scenes @param {number} sceneIndex @return {Promise

Implementation

buildNodeHierarchy(nodeId, parentObject, json, parser) async {
  Map<String, dynamic> nodeDef = json["nodes"][nodeId];

  var node = await parser.getDependency('node', nodeId);

  if (nodeDef["skin"] != null) {
    // build skeleton here as well

    var skinEntry;

    var skin = await parser.getDependency('skin', nodeDef["skin"]);
    skinEntry = skin;

    var jointNodes = [];

    for (var i = 0, il = skinEntry["joints"].length; i < il; i++) {
      var node = await parser.getDependency('node', skinEntry["joints"][i]);

      jointNodes.add(node);
    }

    node.traverse((mesh) {
      if (mesh is SkinnedMesh) {
        List<Bone> bones = [];
        List<Matrix4> boneInverses = [];

        for (var j = 0, jl = jointNodes.length; j < jl; j++) {
          var jointNode = jointNodes[j];

          if (jointNode != null) {
            bones.add(jointNode);

            var mat = Matrix4();

            if (skinEntry["inverseBindMatrices"] != null) {
              mat.fromArray(skinEntry["inverseBindMatrices"].array, j * 16);
            }

            boneInverses.add(mat);
          } else {
            print('THREE.GLTFLoader: Joint "%s" could not be found. ${skinEntry["joints"][j]}');
          }
        }

        mesh.bind(Skeleton(bones, boneInverses), mesh.matrixWorld);
      }
    });
  }

  // build node hierachy

  parentObject.add(node);

  if (nodeDef["children"] != null) {
    var children = nodeDef["children"];

    for (var i = 0, il = children.length; i < il; i++) {
      var child = children[i];
      await buildNodeHierarchy(child, node, json, parser);
    }
  }
}