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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 | 534x 534x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 524x 4386x 4386x 31216x 31216x 31216x 31216x 31216x 31216x 31216x 31216x 31216x 31216x 31216x 31216x 31216x 31216x 524x 524x 524x 524x 4386x 4386x 4386x 4386x 524x 524x 524x 4386x 4386x 4386x 4386x 524x 4386x 26830x 26830x 26830x 26830x 26830x 26830x 26830x 26830x 26830x 26830x 26830x 26830x 524x 524x 524x 524x 524x 524x 524x 524x 1x 534x 534x 534x 534x 534x 534x 1x | import macro from 'vtk.js/Sources/macros'; import vtkPolyData from 'vtk.js/Sources/Common/DataModel/PolyData'; import vtkDataArray from 'vtk.js/Sources/Common/Core/DataArray'; // ---------------------------------------------------------------------------- // vtkSphereSource methods // ---------------------------------------------------------------------------- function vtkSphereSource(publicAPI, model) { // Set our className model.classHierarchy.push('vtkSphereSource'); publicAPI.requestData = (inData, outData) => { Iif (model.deleted) { return; } let dataset = outData[0]; const pointDataType = dataset ? dataset.getPoints().getDataType() : model.pointType; dataset = vtkPolyData.newInstance(); // ---------------------------------------------------------------------- let numPoles = 0; // Check data, determine increments, and convert to radians let { thetaResolution } = model; let startTheta = model.startTheta < model.endTheta ? model.startTheta : model.endTheta; startTheta *= Math.PI / 180.0; let endTheta = model.endTheta > model.startTheta ? model.endTheta : model.startTheta; endTheta *= Math.PI / 180.0; let startPhi = model.startPhi < model.endPhi ? model.startPhi : model.endPhi; startPhi *= Math.PI / 180.0; let endPhi = model.endPhi > model.startPhi ? model.endPhi : model.startPhi; endPhi *= Math.PI / 180.0; Iif (Math.abs(startTheta - endTheta) < 2.0 * Math.PI) { ++thetaResolution; } const deltaTheta = (endTheta - startTheta) / model.thetaResolution; const jStart = model.startPhi <= 0.0 ? 1 : 0; const jEnd = model.phiResolution + (model.endPhi >= 180.0 ? -1 : 0); const numPts = model.phiResolution * thetaResolution + 2; const numPolys = model.phiResolution * 2 * model.thetaResolution; // Points let pointIdx = 0; let points = macro.newTypedArray(pointDataType, numPts * 3); // Normals let normals = new Float32Array(numPts * 3); // Cells let cellLocation = 0; let polys = new Uint32Array(numPolys * 5); // Create north pole if needed if (model.startPhi <= 0.0) { points[pointIdx * 3 + 0] = model.center[0]; points[pointIdx * 3 + 1] = model.center[1]; points[pointIdx * 3 + 2] = model.center[2] + model.radius; normals[pointIdx * 3 + 0] = 0; normals[pointIdx * 3 + 1] = 0; normals[pointIdx * 3 + 2] = 1; pointIdx++; numPoles++; } // Create south pole if needed if (model.endPhi >= 180.0) { points[pointIdx * 3 + 0] = model.center[0]; points[pointIdx * 3 + 1] = model.center[1]; points[pointIdx * 3 + 2] = model.center[2] - model.radius; normals[pointIdx * 3 + 0] = 0; normals[pointIdx * 3 + 1] = 0; normals[pointIdx * 3 + 2] = -1; pointIdx++; numPoles++; } const phiResolution = model.phiResolution - numPoles; const deltaPhi = (endPhi - startPhi) / (model.phiResolution - 1); // Create intermediate points for (let i = 0; i < thetaResolution; i++) { const theta = startTheta + i * deltaTheta; for (let j = jStart; j < jEnd; j++) { const phi = startPhi + j * deltaPhi; const radius = model.radius * Math.sin(phi); normals[pointIdx * 3 + 0] = radius * Math.cos(theta); normals[pointIdx * 3 + 1] = radius * Math.sin(theta); normals[pointIdx * 3 + 2] = model.radius * Math.cos(phi); points[pointIdx * 3 + 0] = normals[pointIdx * 3 + 0] + model.center[0]; points[pointIdx * 3 + 1] = normals[pointIdx * 3 + 1] + model.center[1]; points[pointIdx * 3 + 2] = normals[pointIdx * 3 + 2] + model.center[2]; let norm = Math.sqrt( normals[pointIdx * 3 + 0] * normals[pointIdx * 3 + 0] + normals[pointIdx * 3 + 1] * normals[pointIdx * 3 + 1] + normals[pointIdx * 3 + 2] * normals[pointIdx * 3 + 2] ); norm = norm === 0 ? 1 : norm; normals[pointIdx * 3 + 0] /= norm; normals[pointIdx * 3 + 1] /= norm; normals[pointIdx * 3 + 2] /= norm; pointIdx++; } } // Generate mesh connectivity const base = phiResolution * thetaResolution; Iif (Math.abs(startTheta - endTheta) < 2.0 * Math.PI) { --thetaResolution; } // around north pole if (model.startPhi <= 0.0) { for (let i = 0; i < thetaResolution; i++) { polys[cellLocation++] = 3; polys[cellLocation++] = phiResolution * i + numPoles; polys[cellLocation++] = ((phiResolution * (i + 1)) % base) + numPoles; polys[cellLocation++] = 0; } } // around south pole if (model.endPhi >= 180.0) { const numOffset = phiResolution - 1 + numPoles; for (let i = 0; i < thetaResolution; i++) { polys[cellLocation++] = 3; polys[cellLocation++] = phiResolution * i + numOffset; polys[cellLocation++] = numPoles - 1; polys[cellLocation++] = ((phiResolution * (i + 1)) % base) + numOffset; } } // bands in-between poles for (let i = 0; i < thetaResolution; i++) { for (let j = 0; j < phiResolution - 1; j++) { const a = phiResolution * i + j + numPoles; const b = a + 1; const c = ((phiResolution * (i + 1) + j) % base) + numPoles + 1; if (!model.latLongTessellation) { polys[cellLocation++] = 3; polys[cellLocation++] = a; polys[cellLocation++] = b; polys[cellLocation++] = c; polys[cellLocation++] = 3; polys[cellLocation++] = a; polys[cellLocation++] = c; polys[cellLocation++] = c - 1; } else E{ polys[cellLocation++] = 4; polys[cellLocation++] = a; polys[cellLocation++] = b; polys[cellLocation++] = c; polys[cellLocation++] = c - 1; } } } // Squeeze points = points.subarray(0, pointIdx * 3); dataset.getPoints().setData(points, 3); normals = normals.subarray(0, pointIdx * 3); const normalArray = vtkDataArray.newInstance({ name: 'Normals', values: normals, numberOfComponents: 3, }); dataset.getPointData().setNormals(normalArray); polys = polys.subarray(0, cellLocation); dataset.getPolys().setData(polys, 1); // Update output outData[0] = dataset; }; } // ---------------------------------------------------------------------------- // Object factory // ---------------------------------------------------------------------------- const DEFAULT_VALUES = { radius: 0.5, latLongTessellation: false, thetaResolution: 8, startTheta: 0.0, endTheta: 360.0, phiResolution: 8, startPhi: 0.0, endPhi: 180.0, center: [0, 0, 0], pointType: 'Float64Array', }; // ---------------------------------------------------------------------------- export function extend(publicAPI, model, initialValues = {}) { Object.assign(model, DEFAULT_VALUES, initialValues); // Build VTK API macro.obj(publicAPI, model); macro.setGet(publicAPI, model, [ 'radius', 'latLongTessellation', 'thetaResolution', 'startTheta', 'endTheta', 'phiResolution', 'startPhi', 'endPhi', ]); macro.setGetArray(publicAPI, model, ['center'], 3); macro.algo(publicAPI, model, 0, 1); vtkSphereSource(publicAPI, model); } // ---------------------------------------------------------------------------- export const newInstance = macro.newInstance(extend, 'vtkSphereSource'); // ---------------------------------------------------------------------------- export default { newInstance, extend }; |