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import vtkDataArray from 'vtk.js/Sources/Common/Core/DataArray';
import * as vtkMath from 'vtk.js/Sources/Common/Core/Math';
import vtkPolyData from 'vtk.js/Sources/Common/DataModel/PolyData';
const { vtkErrorMacro } = macro;
// ----------------------------------------------------------------------------
// vtkTextureMapToSphere methods
// ----------------------------------------------------------------------------
function vtkTextureMapToSphere(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkTextureMapToSphere');
publicAPI.requestData = (inData, outData) => {
Iif (model.deleted) {
return;
}
const input = inData[0];
const nbPoints = input.getPoints().getNumberOfPoints();
Iif (nbPoints <= 1) {
vtkErrorMacro("Can't generate texture coordinates without points");
return;
}
const piOverTwo = Math.PI / 2;
const x = [];
const points = input.getPoints();
if (model.automaticSphereGeneration) {
model.center = [0, 0, 0];
for (let i = 0; i < nbPoints; i++) {
points.getPoint(i, x);
model.center[0] += x[0];
model.center[1] += x[1];
model.center[2] += x[2];
}
model.center[0] /= nbPoints;
model.center[1] /= nbPoints;
model.center[2] /= nbPoints;
}
let rho = 0;
let diff = 0;
let phi = 0;
const tc = [0, 0];
let r = 0;
let thetaX = 0;
let thetaY = 0;
const tcoordsData = [];
for (let i = 0; i < nbPoints; i++) {
points.getPoint(i, x);
rho = Math.sqrt(vtkMath.distance2BetweenPoints(x, model.center));
if (rho !== 0) {
diff = x[2] - model.center[2];
Iif (Math.abs(diff) > rho) {
phi = 0;
if (diff > 0) {
tc[1] = 0;
} else {
tc[1] = 1;
}
} else {
phi = Math.acos(diff / rho);
tc[1] = phi / Math.PI;
}
} else E{
tc[1] = 0;
}
r = rho * Math.sin(phi);
if (r !== 0) {
diff = x[0] - model.center[0];
Iif (Math.abs(diff) > r) {
if (diff > 0) {
thetaX = 0;
} else {
thetaX = Math.PI;
}
} else {
thetaX = Math.acos(diff / r);
}
diff = x[1] - model.center[1];
Iif (Math.abs(diff) > r) {
if (diff > 0) {
thetaY = piOverTwo;
} else {
thetaY = -piOverTwo;
}
} else {
thetaY = Math.asin(diff / r);
}
} else E{
thetaX = 0;
thetaY = 0;
}
if (model.preventSeam) {
tc[0] = thetaX / Math.PI;
} else E{
tc[0] = thetaX / (2 * Math.PI);
if (thetaY < 0) {
tc[0] = 1 - tc[0];
}
}
tcoordsData.push(...tc);
}
const tCoords = vtkDataArray.newInstance({
name: 'Texture Coordinates',
numberOfComponents: 2,
size: nbPoints,
values: tcoordsData,
});
const output = vtkPolyData.newInstance();
output
.getPoints()
.setData(new Float32Array(input.getPoints().getData()), 3);
output.getPolys().setData(new Uint32Array(input.getPolys().getData()));
output.getPointData().setTCoords(tCoords);
// Update output
outData[0] = output;
};
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
center: [0, 0, 0],
automaticSphereGeneration: 1,
preventSeam: 1,
};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Build VTK API
macro.obj(publicAPI, model);
macro.setGetArray(publicAPI, model, ['center'], 3);
macro.setGet(publicAPI, model, ['automaticSphereGeneration', 'preventSeam']);
macro.algo(publicAPI, model, 1, 1);
vtkTextureMapToSphere(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(extend, 'vtkTextureMapToSphere');
// ----------------------------------------------------------------------------
export default { newInstance, extend };
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