ZipHttpReader

Live example

Source

import 'vtk.js/Sources/favicon';
import vtkColorTransferFunction from 'vtk.js/Sources/Rendering/Core/ColorTransferFunction';
import vtkFullScreenRenderWindow from 'vtk.js/Sources/Rendering/Misc/FullScreenRenderWindow';
import vtkHttpDataSetReader from 'vtk.js/Sources/IO/Core/HttpDataSetReader';
import vtkPiecewiseFunction from 'vtk.js/Sources/Common/DataModel/PiecewiseFunction';
import vtkVolume from 'vtk.js/Sources/Rendering/Core/Volume';
import vtkVolumeMapper from 'vtk.js/Sources/Rendering/Core/VolumeMapper';
// ----------------------------------------------------------------------------
// Standard rendering code setup
// ----------------------------------------------------------------------------
const fullScreenRenderer = vtkFullScreenRenderWindow.newInstance({ background: [0, 0, 0] });
const renderer = fullScreenRenderer.getRenderer();
const renderWindow = fullScreenRenderer.getRenderWindow();
// ----------------------------------------------------------------------------
// Example code
// ----------------------------------------------------------------------------
// Server is not sending the .gz and whith the compress header
// Need to fetch the true file name and uncompress it locally
// ----------------------------------------------------------------------------
const reader = vtkHttpDataSetReader.newInstance();
const actor = vtkVolume.newInstance();
const mapper = vtkVolumeMapper.newInstance();
mapper.setSampleDistance(0.7);
actor.setMapper(mapper);
// create color and opacity transfer functions
const ctfun = vtkColorTransferFunction.newInstance();
ctfun.addRGBPoint(200.0, 0.4, 0.2, 0.0);
ctfun.addRGBPoint(2000.0, 1.0, 1.0, 1.0);
const ofun = vtkPiecewiseFunction.newInstance();
ofun.addPoint(200.0, 0.0);
ofun.addPoint(1200.0, 0.5);
ofun.addPoint(3000.0, 0.8);
actor.getProperty().setRGBTransferFunction(0, ctfun);
actor.getProperty().setScalarOpacity(0, ofun);
actor.getProperty().setScalarOpacityUnitDistance(0, 4.5);
actor.getProperty().setInterpolationTypeToLinear();
actor.getProperty().setUseGradientOpacity(0, true);
actor.getProperty().setGradientOpacityMinimumValue(0, 15);
actor.getProperty().setGradientOpacityMinimumOpacity(0, 0.0);
actor.getProperty().setGradientOpacityMaximumValue(0, 100);
actor.getProperty().setGradientOpacityMaximumOpacity(0, 1.0);
actor.getProperty().setShade(true);
actor.getProperty().setAmbient(0.2);
actor.getProperty().setDiffuse(0.7);
actor.getProperty().setSpecular(0.3);
actor.getProperty().setSpecularPower(8.0);
mapper.setInputConnection(reader.getOutputPort());
// we first load a small dataset 64x64x91
reader.setUrl('https://data.kitware.com/api/v1/file/58e79a8b8d777f16d095fcd7/download', { fullPath: true, compression: 'zip', loadData: true }).then(() => {
renderer.addVolume(actor);
renderer.resetCamera();
renderer.getActiveCamera().zoom(1.5);
renderer.getActiveCamera().elevation(70);
renderer.updateLightsGeometryToFollowCamera();
renderWindow.render();
// now that the small dataset is loaded we pull down the
// full resolution 256x256x91 dataset
reader.setUrl('https://data.kitware.com/api/v1/file/58e665158d777f16d095fc2e/download', { fullPath: true, compression: 'zip', loadData: true }).then(() => {
renderWindow.render();
});
});
// -----------------------------------------------------------
// Make some variables global so that you can inspect and
// modify objects in your browser's developer console:
// -----------------------------------------------------------
global.source = reader;
global.mapper = mapper;
global.actor = actor;
global.ctfun = ctfun;
global.ofun = ofun;
global.renderer = renderer;
global.renderWindow = renderWindow;