@kitware/vtk.js/Widgets/Widgets3D/ImageCroppingWidget/state.js

Visualization Toolkit for the Web

import vtkStateBuilder from '../../Core/StateBuilder.js';
import { AXES, handleTypeFromName } from './helpers.js';

function build() {
  // create our state builder
  var builder = vtkStateBuilder.createBuilder(); // add image data description fields

  builder.addField({
    name: 'indexToWorldT',
    initialValue: Array(16).fill(0)
  }).addField({
    name: 'worldToIndexT',
    initialValue: Array(16).fill(0)
  }); // make cropping planes a sub-state so we can listen to it
  // separately from the rest of the widget state.

  var croppingState = vtkStateBuilder.createBuilder().addField({
    name: 'planes',
    // index space
    initialValue: [0, 1, 0, 1, 0, 1]
  }).build(); // add cropping planes state to our primary state

  builder.addStateFromInstance({
    labels: ['croppingPlanes'],
    name: 'croppingPlanes',
    instance: croppingState
  }); // add all handle states
  // default bounds is [-1, 1] in all dimensions

  for (var i = -1; i < 2; i++) {
    for (var j = -1; j < 2; j++) {
      for (var k = -1; k < 2; k++) {
        // skip center of box
        if (i !== 0 || j !== 0 || k !== 0) {
          var name = AXES[i + 1] + AXES[j + 1] + AXES[k + 1];
          var type = handleTypeFromName(name); // since handle states are rendered via vtkSphereHandleRepresentation,
          // we can dictate the handle origin, size (scale1), color, and visibility.

          builder.addStateFromMixin({
            labels: ['handles', name, type],
            mixins: ['name', 'origin', 'color', 'scale1', 'visible', 'manipulator'],
            name: name,
            initialValues: {
              scale1: 30,
              origin: [i, j, k],
              visible: true,
              name: name
            }
          });
        }
      }
    }
  }

  return builder.build();
}

export { build as default };