constructor()

in modules/core/src/lib/deck.js [143:222]

• 63 lines of code
• 7 McCabe index (conditional complexity)

  constructor(props) {
    props = Object.assign({}, defaultProps, props);
    this.props = {};

    this.width = 0; // "read-only", auto-updated from canvas
    this.height = 0; // "read-only", auto-updated from canvas

    // Maps view descriptors to vieports, rebuilds when width/height/viewState/views change
    this.viewManager = null;
    this.layerManager = null;
    this.effectManager = null;
    this.deckRenderer = null;
    this.deckPicker = null;

    this._needsRedraw = true;
    this._pickRequest = {};
    // Pick and store the object under the pointer on `pointerdown`.
    // This object is reused for subsequent `onClick` and `onDrag*` callbacks.
    this._lastPointerDownInfo = null;

    this.viewState = null; // Internal view state if no callback is supplied
    this.interactiveState = {
      isDragging: false // Whether the cursor is down
    };

    // Bind methods
    this._onEvent = this._onEvent.bind(this);
    this._onPointerDown = this._onPointerDown.bind(this);
    this._onPointerMove = this._onPointerMove.bind(this);
    this._pickAndCallback = this._pickAndCallback.bind(this);
    this._onRendererInitialized = this._onRendererInitialized.bind(this);
    this._onRenderFrame = this._onRenderFrame.bind(this);
    this._onViewStateChange = this._onViewStateChange.bind(this);
    this._onInteractiveStateChange = this._onInteractiveStateChange.bind(this);

    if (props.viewState && props.initialViewState) {
      log.warn(
        'View state tracking is disabled. Use either `initialViewState` for auto update or `viewState` for manual update.'
      )();
    }
    if (getBrowser() === 'IE') {
      log.warn('IE 11 support will be deprecated in v8.0')();
    }

    if (!props.gl) {
      // Note: LayerManager creation deferred until gl context available
      if (typeof document !== 'undefined') {
        this.canvas = this._createCanvas(props);
      }
    }
    this.animationLoop = this._createAnimationLoop(props);

    this.stats = new Stats({id: 'deck.gl'});
    this.metrics = {
      fps: 0,
      setPropsTime: 0,
      updateAttributesTime: 0,
      framesRedrawn: 0,
      pickTime: 0,
      pickCount: 0,
      gpuTime: 0,
      gpuTimePerFrame: 0,
      cpuTime: 0,
      cpuTimePerFrame: 0,
      bufferMemory: 0,
      textureMemory: 0,
      renderbufferMemory: 0,
      gpuMemory: 0
    };
    this._metricsCounter = 0;

    this.setProps(props);

    // UNSAFE/experimental prop: only set at initialization to avoid performance hit
    if (props._typedArrayManagerProps) {
      typedArrayManager.setProps(props._typedArrayManagerProps);
    }

    this.animationLoop.start();
  }