createCamera method

dynamic createCamera(dynamic relationships)

Implementation

createCamera(relationships) {
  var model;
  var cameraAttribute;

  relationships.children.forEach((child) {
    var attr = fbxTree.Objects["NodeAttribute"][child["ID"]];

    if (attr != null) {
      cameraAttribute = attr;
    }
  });

  if (cameraAttribute == null) {
    model = new Object3D();
  } else {
    var type = 0;
    if (cameraAttribute.CameraProjectionType != null &&
        cameraAttribute.CameraProjectionType.value == 1) {
      type = 1;
    }

    var nearClippingPlane = 1;
    if (cameraAttribute.NearPlane != null) {
      nearClippingPlane = cameraAttribute.NearPlane.value / 1000;
    }

    var farClippingPlane = 1000;
    if (cameraAttribute.FarPlane != null) {
      farClippingPlane = cameraAttribute.FarPlane.value / 1000;
    }

    var width = innerWidth;
    var height = innerHeight;

    if (cameraAttribute.AspectWidth != null &&
        cameraAttribute.AspectHeight != null) {
      width = cameraAttribute.AspectWidth.value;
      height = cameraAttribute.AspectHeight.value;
    }

    var aspect = width / height;

    var fov = 45;
    if (cameraAttribute.FieldOfView != null) {
      fov = cameraAttribute.FieldOfView.value;
    }

    var focalLength = cameraAttribute.FocalLength
        ? cameraAttribute.FocalLength.value
        : null;

    switch (type) {
      case 0: // Perspective
        model = new PerspectiveCamera(
            fov, aspect, nearClippingPlane, farClippingPlane);
        if (focalLength != null) model.setFocalLength(focalLength);
        break;

      case 1: // Orthographic
        model = new OrthographicCamera(-width / 2, width / 2, height / 2,
            -height / 2, nearClippingPlane, farClippingPlane);
        break;

      default:
        print('THREE.FBXLoader: Unknown camera type ${type}.');
        model = new Object3D();
        break;
    }
  }

  return model;
}