@kitware/vtk.js/Interaction/Manipulators/MouseCameraTrackballPanManipulator.js

Visualization Toolkit for the Web

import { m as macro } from '../../macros2.js';
import vtkCompositeCameraManipulator from './CompositeCameraManipulator.js';
import vtkCompositeMouseManipulator from './CompositeMouseManipulator.js';
import { j as cross } from '../../Common/Core/Math/index.js';

// ----------------------------------------------------------------------------
// vtkMouseCameraTrackballPanManipulator methods
// ----------------------------------------------------------------------------

function vtkMouseCameraTrackballPanManipulator(publicAPI, model) {
  // Set our className
  model.classHierarchy.push('vtkMouseCameraTrackballPanManipulator');
  publicAPI.onButtonDown = (interactor, renderer, position) => {
    model.previousPosition = position;
  };
  publicAPI.onMouseMove = (interactor, renderer, position) => {
    if (!position) {
      return;
    }
    const pos = position;
    const lastPos = model.previousPosition;
    model.previousPosition = position;
    const camera = renderer.getActiveCamera();
    const camPos = camera.getPosition();
    const fp = camera.getFocalPoint();
    if (camera.getParallelProjection()) {
      camera.orthogonalizeViewUp();
      const up = camera.getViewUp();
      const vpn = camera.getViewPlaneNormal();
      const right = [0, 0, 0];
      cross(vpn, up, right);

      // These are different because y is flipped.
      const height = interactor.getView().getViewportSize(renderer)[1];
      let dx = (pos.x - lastPos.x) / height;
      let dy = (lastPos.y - pos.y) / height;
      const scale = camera.getParallelScale();
      dx *= scale * 2.0;
      dy *= scale * 2.0;
      let tmp = right[0] * dx + up[0] * dy;
      camPos[0] += tmp;
      fp[0] += tmp;
      tmp = right[1] * dx + up[1] * dy;
      camPos[1] += tmp;
      fp[1] += tmp;
      tmp = right[2] * dx + up[2] * dy;
      camPos[2] += tmp;
      fp[2] += tmp;
      camera.setPosition(camPos[0], camPos[1], camPos[2]);
      camera.setFocalPoint(fp[0], fp[1], fp[2]);
    } else {
      const {
        center
      } = model;
      const style = interactor.getInteractorStyle();
      const focalDepth = style.computeWorldToDisplay(renderer, center[0], center[1], center[2])[2];
      const worldPoint = style.computeDisplayToWorld(renderer, pos.x, pos.y, focalDepth);
      const lastWorldPoint = style.computeDisplayToWorld(renderer, lastPos.x, lastPos.y, focalDepth);
      const newCamPos = [camPos[0] + (lastWorldPoint[0] - worldPoint[0]), camPos[1] + (lastWorldPoint[1] - worldPoint[1]), camPos[2] + (lastWorldPoint[2] - worldPoint[2])];
      const newFp = [fp[0] + (lastWorldPoint[0] - worldPoint[0]), fp[1] + (lastWorldPoint[1] - worldPoint[1]), fp[2] + (lastWorldPoint[2] - worldPoint[2])];
      camera.setPosition(newCamPos[0], newCamPos[1], newCamPos[2]);
      camera.setFocalPoint(newFp[0], newFp[1], newFp[2]);
    }
    renderer.resetCameraClippingRange();
    if (interactor.getLightFollowCamera()) {
      renderer.updateLightsGeometryToFollowCamera();
    }
  };
}

// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------

const DEFAULT_VALUES = {};

// ----------------------------------------------------------------------------

function extend(publicAPI, model, initialValues = {}) {
  Object.assign(model, DEFAULT_VALUES, initialValues);

  // Inheritance
  macro.obj(publicAPI, model);
  vtkCompositeCameraManipulator.extend(publicAPI, model, initialValues);
  vtkCompositeMouseManipulator.extend(publicAPI, model, initialValues);

  // Object specific methods
  vtkMouseCameraTrackballPanManipulator(publicAPI, model);
}

// ----------------------------------------------------------------------------

const newInstance = macro.newInstance(extend, 'vtkMouseCameraTrackballPanManipulator');

// ----------------------------------------------------------------------------

var vtkMouseCameraTrackballPanManipulator$1 = {
  newInstance,
  extend
};

export { vtkMouseCameraTrackballPanManipulator$1 as default, extend, newInstance };