@thewtex/vtk.js-esm/Interaction/Manipulators/MouseCameraSliceManipulator.js

Visualization Toolkit for the Web

import macro from '../../macro.js';
import vtkCompositeCameraManipulator from './CompositeCameraManipulator.js';
import vtkCompositeMouseManipulator from './CompositeMouseManipulator.js';
import { r as radiansFromDegrees } from '../../Common/Core/Math/index.js';

// vtkMouseCameraSliceManipulator methods
// ----------------------------------------------------------------------------

function vtkMouseCameraSliceManipulator(publicAPI, model) {
  // Set our className
  model.classHierarchy.push('vtkMouseCameraSliceManipulator');

  publicAPI.onButtonDown = function (interactor, renderer, position) {
    model.previousPosition = position;
  };

  publicAPI.onMouseMove = function (interactor, renderer, position) {
    if (!position) {
      return;
    }

    var dy = position.y - model.previousPosition.y;
    var camera = renderer.getActiveCamera();
    var range = camera.getClippingRange();
    var distance = camera.getDistance(); // scale the interaction by the height of the viewport

    var viewportHeight = 0.0;

    if (camera.getParallelProjection()) {
      viewportHeight = camera.getParallelScale();
    } else {
      var angle = radiansFromDegrees(camera.getViewAngle());
      viewportHeight = 2.0 * distance * Math.tan(0.5 * angle);
    }

    var size = interactor.getView().getViewportSize(renderer);
    var delta = dy * viewportHeight / size[1];
    distance += delta; // clamp the distance to the clipping range

    if (distance < range[0]) {
      distance = range[0] + viewportHeight * 1e-3;
    }

    if (distance > range[1]) {
      distance = range[1] - viewportHeight * 1e-3;
    }

    camera.setDistance(distance);
    model.previousPosition = position;
  };

  publicAPI.onScroll = function (interactor, renderer, delta) {
    if (!delta) {
      return;
    }

    var scrollDelta = 1.0 - delta;
    scrollDelta *= 25; // TODO: expose factor?

    var camera = renderer.getActiveCamera();
    var range = camera.getClippingRange();
    var distance = camera.getDistance();
    distance += scrollDelta; // clamp the distance to the clipping range

    if (distance < range[0]) {
      distance = range[0];
    }

    if (distance > range[1]) {
      distance = range[1];
    }

    camera.setDistance(distance);
  };
} // ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------


var DEFAULT_VALUES = {}; // ----------------------------------------------------------------------------

function extend(publicAPI, model) {
  var initialValues = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
  Object.assign(model, DEFAULT_VALUES, initialValues); // Inheritance

  macro.obj(publicAPI, model);
  vtkCompositeCameraManipulator.extend(publicAPI, model, initialValues);
  vtkCompositeMouseManipulator.extend(publicAPI, model, initialValues); // Object specific methods

  vtkMouseCameraSliceManipulator(publicAPI, model);
} // ----------------------------------------------------------------------------

var newInstance = macro.newInstance(extend, 'vtkMouseCameraSliceManipulator'); // ----------------------------------------------------------------------------

var vtkMouseCameraSliceManipulator$1 = {
  newInstance: newInstance,
  extend: extend
};

export default vtkMouseCameraSliceManipulator$1;
export { extend, newInstance };