OutlineContextRepresentation

Source

index.js
import macro from 'vtk.js/Sources/macro';
import vtkActor from 'vtk.js/Sources/Rendering/Core/Actor';
import vtkContextRepresentation from 'vtk.js/Sources/Widgets/Representations/ContextRepresentation';
import vtkMapper from 'vtk.js/Sources/Rendering/Core/Mapper';
import vtkPolyData from 'vtk.js/Sources/Common/DataModel/PolyData';
import vtkBoundingBox from 'vtk.js/Sources/Common/DataModel/BoundingBox';

import {
BOUNDS_MAP,
LINE_ARRAY,
} from 'vtk.js/Sources/Filters/General/OutlineFilter';

// ----------------------------------------------------------------------------
// vtkOutlineContextRepresentation methods
// ----------------------------------------------------------------------------

// Represents a box outline given 8 points as corners.
// Does not work with an arbitrary set of points. An oriented bounding box
// algorithm may be implemented in the future.
function vtkOutlineContextRepresentation(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkOutlineContextRepresentation');

// internal bounding box
model.bbox = vtkBoundingBox.newInstance();

// --------------------------------------------------------------------------
// Internal polydata dataset
// --------------------------------------------------------------------------

model.internalPolyData = vtkPolyData.newInstance({ mtime: 0 });
model.points = new Float32Array(8 * 3);
model.internalPolyData.getPoints().setData(model.points, 3);
model.internalPolyData.getLines().setData(Uint16Array.from(LINE_ARRAY));

// --------------------------------------------------------------------------
// Generic rendering pipeline
// --------------------------------------------------------------------------

model.mapper = vtkMapper.newInstance({
scalarVisibility: false,
});
model.actor = vtkActor.newInstance();
model.actor.getProperty().setEdgeColor(...model.edgeColor);
model.mapper.setInputConnection(publicAPI.getOutputPort());
model.actor.setMapper(model.mapper);

model.actors.push(model.actor);

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

publicAPI.requestData = (inData, outData) => {
const list = publicAPI.getRepresentationStates(inData[0]);
model.bbox.reset();

for (let i = 0; i < list.length; i++) {
const pt = list[i].getOrigin();
model.bbox.addPoint(...pt);
}

const bounds = model.bbox.getBounds();

// BOUNDS_MAP.length should equal model.points.length
for (let i = 0; i < BOUNDS_MAP.length; i++) {
model.points[i] = bounds[BOUNDS_MAP[i]];
}

model.internalPolyData.getPoints().modified();
model.internalPolyData.modified();

outData[0] = model.internalPolyData;
};
}

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

const DEFAULT_VALUES = {
edgeColor: [1, 1, 1],
};

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

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

vtkContextRepresentation.extend(publicAPI, model, initialValues);
macro.setGetArray(publicAPI, model, ['edgeColor'], 3);
macro.get(publicAPI, model, ['mapper', 'actor']);

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

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

export const newInstance = macro.newInstance(
extend,
'vtkOutlineContextRepresentation'
);

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

export default { newInstance, extend };