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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 | 1x 4x 12x 12x 12x 12x 12x 12x 12x 12x 12x 60x 12x 12x 4x 20x 20x 20x 4x 4x 4x 512x 4x 4x 4x 4x 1x 4x 4x 4x 4x 1x | import macro from 'vtk.js/Sources/macros';
import vtkCardinalSpline1D from 'vtk.js/Sources/Common/DataModel/CardinalSpline1D';
import vtkKochanekSpline1D from 'vtk.js/Sources/Common/DataModel/KochanekSpline1D';
import { splineKind } from 'vtk.js/Sources/Common/DataModel/Spline3D/Constants';
const { vtkErrorMacro } = macro;
// ----------------------------------------------------------------------------
// vtkSpline3D methods
// ----------------------------------------------------------------------------
function vtkSpline3D(publicAPI, model) {
// Set our classname
model.classHierarchy.push('vtkSpline3D');
// --------------------------------------------------------------------------
function computeCoefficients1D(spline, points, boundaryConditionValue) {
Iif (points.length === 0) {
vtkErrorMacro('Splines require at least one points');
}
// If we have only one point we create a spline
// which two extremities are the same point
Iif (points.length === 1) {
points.push(points[0]);
}
const size = points.length;
let work = null;
let intervals = null;
work = new Float32Array(size);
if (model.intervals.length === 0) {
intervals = new Float32Array(size);
for (let i = 0; i < intervals.length; i++) {
intervals[i] = i;
}
} else E{
intervals = model.intervals;
}
if (model.close) {
spline.computeCloseCoefficients(size, work, intervals, points);
} else E{
spline.computeOpenCoefficients(size, work, intervals, points, {
leftConstraint: model.boundaryCondition,
leftValue: boundaryConditionValue,
rightConstraint: model.boundaryCondition,
rightValue: boundaryConditionValue,
});
}
}
// --------------------------------------------------------------------------
publicAPI.computeCoefficients = (points) => {
const x = points.map((pt) => pt[0]);
const y = points.map((pt) => pt[1]);
const z = points.map((pt) => pt[2]);
computeCoefficients1D(model.splineX, x, model.boundaryConditionValues[0]);
computeCoefficients1D(model.splineY, y, model.boundaryConditionValues[1]);
computeCoefficients1D(model.splineZ, z, model.boundaryConditionValues[2]);
};
// --------------------------------------------------------------------------
publicAPI.getPoint = (intervalIndex, t) => [
model.splineX.getValue(intervalIndex, t),
model.splineY.getValue(intervalIndex, t),
model.splineZ.getValue(intervalIndex, t),
];
// --------------------------------------------------------------------------
// initialization
// --------------------------------------------------------------------------
if (model.kind === splineKind.KOCHANEK_SPLINE) {
model.splineX = vtkKochanekSpline1D.newInstance({
tension: model.tension,
continuity: model.continuity,
bias: model.bias,
});
model.splineY = vtkKochanekSpline1D.newInstance({
tension: model.tension,
continuity: model.continuity,
bias: model.bias,
});
model.splineZ = vtkKochanekSpline1D.newInstance({
tension: model.tension,
continuity: model.continuity,
bias: model.bias,
});
} else Eif (model.kind === splineKind.CARDINAL_SPLINE) {
model.splineX = vtkCardinalSpline1D.newInstance();
model.splineY = vtkCardinalSpline1D.newInstance();
model.splineZ = vtkCardinalSpline1D.newInstance();
} else {
vtkErrorMacro(`Unknown spline type ${model.kind}`);
}
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
close: false,
intervals: [],
kind: splineKind.KOCHANEK_SPLINE,
boundaryConditionValues: [0, 0, 0],
// Passed to the vtkKochanekSpline1D
tension: 0,
continuity: 0,
bias: 0,
};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Build VTK API
macro.obj(publicAPI, model);
macro.setGet(publicAPI, model, ['close', 'intervals']);
vtkSpline3D(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(extend, 'vtkSpline3D');
// ----------------------------------------------------------------------------
export default { newInstance, extend };
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