Cone

Live example

Source

import 'vtk.js/Sources/favicon';

import vtkActor from 'vtk.js/Sources/Rendering/Core/Actor';
import vtkCalculator from 'vtk.js/Sources/Filters/General/Calculator';
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 { AttributeTypes } from 'vtk.js/Sources/Common/DataModel/DataSetAttributes/Constants';
import { FieldDataTypes } from 'vtk.js/Sources/Common/DataModel/DataSet/Constants';

import controlPanel from './controller.html';

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

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

// ----------------------------------------------------------------------------
// Example code
// ----------------------------------------------------------------------------
// create a filter on the fly, sort of cool, this is a random scalars
// filter we create inline, for a simple cone you would not need
// this
// ----------------------------------------------------------------------------

const coneSource = vtkConeSource.newInstance({ height: 1.0 });
const filter = vtkCalculator.newInstance();

filter.setInputConnection(coneSource.getOutputPort());
// filter.setFormulaSimple(FieldDataTypes.CELL, [], 'random', () => Math.random());
filter.setFormula({
getArrays: (inputDataSets) => ({
input: [],
output: [
{
location: FieldDataTypes.CELL,
name: 'Random',
dataType: 'Float32Array',
attribute: AttributeTypes.SCALARS,
},
],
}),
evaluate: (arraysIn, arraysOut) => {
const [scalars] = arraysOut.map((d) => d.getData());
for (let i = 0; i < scalars.length; i++) {
scalars[i] = Math.random();
}
},
});

const mapper = vtkMapper.newInstance();
mapper.setInputConnection(filter.getOutputPort());

const actor = vtkActor.newInstance();
actor.setMapper(mapper);

renderer.addActor(actor);
renderer.resetCamera();
renderWindow.render();

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

fullScreenRenderer.addController(controlPanel);
const representationSelector = document.querySelector('.representations');
const resolutionChange = document.querySelector('.resolution');

representationSelector.addEventListener('change', (e) => {
const newRepValue = Number(e.target.value);
actor.getProperty().setRepresentation(newRepValue);
renderWindow.render();
});

resolutionChange.addEventListener('input', (e) => {
const resolution = Number(e.target.value);
coneSource.setResolution(resolution);
renderWindow.render();
});

// -----------------------------------------------------------
// Make some variables global so that you can inspect and
// modify objects in your browser's developer console:
// -----------------------------------------------------------

global.source = coneSource;
global.mapper = mapper;
global.actor = actor;
global.renderer = renderer;
global.renderWindow = renderWindow;