vtk.js

PolyLineWidget

Live example

Source

import 'vtk.js/Sources/favicon';

// Load the rendering pieces we want to use (for both WebGL and WebGPU)
import 'vtk.js/Sources/Rendering/Profiles/Geometry';
import 'vtk.js/Sources/Rendering/Profiles/Glyph';

import vtkActor from 'vtk.js/Sources/Rendering/Core/Actor';
import vtkConeSource from 'vtk.js/Sources/Filters/Sources/ConeSource';
import vtkFullScreenRenderWindow from 'vtk.js/Sources/Rendering/Misc/FullScreenRenderWindow';
import vtkMapper from 'vtk.js/Sources/Rendering/Core/Mapper';
import vtkPolyLineWidget from 'vtk.js/Sources/Widgets/Widgets3D/PolyLineWidget';
import vtkWidgetManager from 'vtk.js/Sources/Widgets/Core/WidgetManager';

import controlPanel from './controlPanel.html';

// ----------------------------------------------------------------------------
// Standard rendering code setup
// ----------------------------------------------------------------------------

const fullScreenRenderer = vtkFullScreenRenderWindow.newInstance({
  background: [0, 0, 0],
});
const renderer = fullScreenRenderer.getRenderer();

const cone = vtkConeSource.newInstance();
const mapper = vtkMapper.newInstance();
const actor = vtkActor.newInstance();

actor.setMapper(mapper);
mapper.setInputConnection(cone.getOutputPort());
actor.getProperty().setOpacity(0.5);

renderer.addActor(actor);

// ----------------------------------------------------------------------------
// Widget manager
// ----------------------------------------------------------------------------

const widgetManager = vtkWidgetManager.newInstance();
widgetManager.setRenderer(renderer);

const widget = vtkPolyLineWidget.newInstance();
widget.placeWidget(cone.getOutputData().getBounds());

widgetManager.addWidget(widget);

renderer.resetCamera();
widgetManager.enablePicking();
widgetManager.grabFocus(widget);

// -----------------------------------------------------------
// UI control handling
// -----------------------------------------------------------

fullScreenRenderer.addController(controlPanel);

document.querySelector('button').addEventListener('click', () => {
  widgetManager.grabFocus(widget);
});

document
  .querySelector('input[type=checkbox]')
  .addEventListener('change', (ev) => {
    widgetManager.setUseSvgLayer(ev.target.checked);
  });