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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | import macro from 'vtk.js/Sources/macros'; import vtkImageData from 'vtk.js/Sources/Common/DataModel/ImageData'; import vtkDataArray from 'vtk.js/Sources/Common/Core/DataArray'; // ---------------------------------------------------------------------------- // Global methods // ---------------------------------------------------------------------------- function generateCoordinates(origin, dimensions, spacing) { const coordinates = new Float64Array( dimensions[0] * dimensions[1] * dimensions[2] * 3 ); let offset = 0; for (let k = 0; k < dimensions[2]; k++) { const z = origin[2] + spacing[2] * k; for (let j = 0; j < dimensions[1]; j++) { const y = origin[1] + spacing[1] * j; for (let i = 0; i < dimensions[0]; i++) { const x = origin[0] + spacing[0] * i; coordinates[offset++] = x; coordinates[offset++] = y; coordinates[offset++] = z; } } } return coordinates; } // ---------------------------------------------------------------------------- // vtkSLICSource methods // ---------------------------------------------------------------------------- function vtkSLICSource(publicAPI, model) { // Set our className model.classHierarchy.push('vtkSLICSource'); publicAPI.addCluster = ( centerX, centerY, centerZ, fnConst, fnDfDx, fnDfDy, fnDfDz ) => { const id = model.clusters.length; model.clusters.push( new Float64Array([ centerX, centerY, centerZ, fnConst, fnDfDx, fnDfDy, fnDfDz, ]) ); publicAPI.modified(); return id; }; publicAPI.removeCluster = (id) => { model.clusters.splice(id, 1); publicAPI.modified(); }; publicAPI.removeAllClusters = () => { model.clusters = []; publicAPI.modified(); }; publicAPI.updateCluster = ( id, centerX, centerY, centerZ, fnConst, fnDfDx, fnDfDy, fnDfDz ) => { if (!model.clusters[id]) { model.clusters[id] = new Float64Array(7); } model.clusters[id][0] = centerX; model.clusters[id][1] = centerY; model.clusters[id][2] = centerZ; model.clusters[id][3] = fnConst; model.clusters[id][4] = fnDfDx; model.clusters[id][5] = fnDfDy; model.clusters[id][6] = fnDfDz; publicAPI.modified(); }; publicAPI.getNumberOfClusters = () => model.clusters.length; publicAPI.requestData = (inData, outData) => { if (model.deleted) { return; } const dataSize = model.dimensions[0] * model.dimensions[1] * model.dimensions[2]; const imageData = vtkImageData.newInstance(); imageData.setSpacing(...model.spacing); imageData.setExtent( 0, model.dimensions[0] - 1, 0, model.dimensions[1] - 1, 0, model.dimensions[2] - 1 ); imageData.setOrigin(...model.origin); // Pixel centers const centers = generateCoordinates( model.origin, model.dimensions, model.spacing ); // Fill clusterIdxValues const nbBytes = (model.clusters.length < 256 ? 8 : 0) || (model.clusters.length < 65536 ? 16 : 32); const clusterIdxValues = macro.newTypedArray( `Uint${nbBytes}Array`, dataSize ); for (let i = 0; i < dataSize; i++) { let clusterDistance = Number.MAX_VALUE; model.clusters.forEach((cluster, idx) => { const dist = (cluster[0] - centers[i * 3]) * (cluster[0] - centers[i * 3]) + (cluster[1] - centers[i * 3 + 1]) * (cluster[1] - centers[i * 3 + 1]) + (cluster[2] - centers[i * 3 + 2]) * (cluster[2] - centers[i * 3 + 2]); if (dist < clusterDistance) { clusterDistance = dist; clusterIdxValues[i] = idx; } }); } const clusters = vtkDataArray.newInstance({ name: model.clusterArrayName, numberOfComponents: 1, values: clusterIdxValues, }); imageData.getPointData().addArray(clusters); // Fill scalarValues const scalarValues = new Float32Array(dataSize); for (let i = 0; i < dataSize; i++) { const cluster = model.clusters[clusterIdxValues[i]]; scalarValues[i] = cluster[3] + cluster[4] * (centers[i * 3 + 0] - cluster[0]) + cluster[5] * (centers[i * 3 + 1] - cluster[1]) + cluster[6] * (centers[i * 3 + 2] - cluster[2]); } const scalars = vtkDataArray.newInstance({ name: model.scalarArrayName, numberOfComponents: 1, values: scalarValues, }); imageData.getPointData().addArray(scalars); // Update output outData[0] = imageData; }; } // ---------------------------------------------------------------------------- // Object factory // ---------------------------------------------------------------------------- const DEFAULT_VALUES = { clusters: [], spacing: [1.0, 1.0, 1.0], origin: [0.0, 0.0, 0.0], dimensions: [10, 10, 10], clusterArrayName: 'cluster', scalarArrayName: 'field', }; // ---------------------------------------------------------------------------- export function extend(publicAPI, model, initialValues = {}) { Object.assign(model, DEFAULT_VALUES, initialValues); // Build VTK API macro.obj(publicAPI, model); macro.setGet(publicAPI, model, ['clusterArrayName', 'scalarArrayName']); macro.setGetArray(publicAPI, model, ['origin', 'spacing', 'dimensions'], 3); macro.algo(publicAPI, model, 0, 1); vtkSLICSource(publicAPI, model); } // ---------------------------------------------------------------------------- export const newInstance = macro.newInstance(extend, 'vtkSLICSource'); // ---------------------------------------------------------------------------- export default { newInstance, extend }; |