ViewFinderSource

Source

index.js
import macro from 'vtk.js/Sources/macros';
import vtkMatrixBuilder from 'vtk.js/Sources/Common/Core/MatrixBuilder';
import vtkPolyData from 'vtk.js/Sources/Common/DataModel/PolyData';

function vtkViewFinderSource(publicAPI, model) {
publicAPI.requestData = (inData, outData) => {
const dataset = vtkPolyData.newInstance();

const points = macro.newTypedArray(model.pointType, 3 * 16);

points[0] = model.radius;
points[1] = model.radius / model.width;
points[2] = 0;
points[3] = model.radius + model.spacing;
points[4] = model.radius / model.width;
points[5] = 0;

points[6] = model.radius;
points[7] = (model.radius / model.width) * -1;
points[8] = 0;
points[9] = model.radius + model.spacing;
points[10] = (model.radius / model.width) * -1;
points[11] = 0;

points[12] = model.radius * -1;
points[13] = model.radius / model.width;
points[14] = 0;
points[15] = (model.radius + model.spacing) * -1;
points[16] = model.radius / model.width;
points[17] = 0;

points[18] = model.radius * -1;
points[19] = (model.radius / model.width) * -1;
points[20] = 0;
points[21] = (model.radius + model.spacing) * -1;
points[22] = (model.radius / model.width) * -1;
points[23] = 0;

points[24] = model.radius / model.width;
points[25] = model.radius;
points[26] = 0;
points[27] = model.radius / model.width;
points[28] = model.radius + model.spacing;
points[29] = 0;

points[30] = (model.radius / model.width) * -1;
points[31] = model.radius;
points[32] = 0;
points[33] = (model.radius / model.width) * -1;
points[34] = model.radius + model.spacing;
points[35] = 0;

points[36] = model.radius / model.width;
points[37] = model.radius * -1;
points[38] = 0;
points[39] = model.radius / model.width;
points[40] = (model.radius + model.spacing) * -1;
points[41] = 0;

points[42] = (model.radius / model.width) * -1;
points[43] = model.radius * -1;
points[44] = 0;
points[45] = (model.radius / model.width) * -1;
points[46] = (model.radius + model.spacing) * -1;
points[47] = 0;

// prettier-ignore
const cells = Uint8Array.from([
3, 0, 1, 2,
3, 2, 1, 3,
3, 4, 6, 5,
3, 6, 5, 7,
3, 8, 11, 9,
3, 8, 10, 11,
3, 12, 13, 15,
3, 12, 15, 14,
]);

vtkMatrixBuilder
.buildFromRadian()
.translate(...model.center)
.rotateFromDirections([1, 0, 0], model.orientation)
.apply(points);

dataset.getPoints().setData(points, 3);
dataset.getPolys().setData(cells, 1);

outData[0] = dataset;
};
}

// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
radius: 1,
spacing: 2,
width: 4,
pointType: 'Float32Array',
};

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

export function extend(publicAPI, model, initialValues = {}) {
model.center = [0, 0, 0];
model.orientation = [1, 0, 0];

Object.assign(model, DEFAULT_VALUES, initialValues);

// Build VTK API
macro.obj(publicAPI, model);
macro.setGet(publicAPI, model, ['radius', 'spacing', 'width']);
macro.setGetArray(publicAPI, model, ['center', 'orientation'], 3);
macro.algo(publicAPI, model, 0, 1);
vtkViewFinderSource(publicAPI, model);
}

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

export const newInstance = macro.newInstance(extend, 'vtkArrow2DSource');

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

export default { newInstance, extend };