Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 | // @author: Thomas Beznik <thomas.beznik@relu.eu>, with the help of Julien Finet <julien.finet@kitware.com> (https://github.com/Kitware/vtk-js/issues/1442)
// and inspired from Paul Kaplan (https://gist.github.com/paulkaplan/6d5f0ab2c7e8fdc68a61).
import { vec3 } from 'gl-matrix';
import macro from 'vtk.js/Sources/macros';
import vtkTriangle from 'vtk.js/Sources/Common/DataModel/Triangle';
import { FormatTypes } from 'vtk.js/Sources/IO/Geometry/STLWriter/Constants';
const { vtkErrorMacro } = macro;
// ----------------------------------------------------------------------------
// Global methods
// ----------------------------------------------------------------------------
function writeFloatBinary(dataView, offset, float) {
dataView.setFloat32(offset, float.toPrecision(6), true);
return offset + 4;
}
function writeVectorBinary(dataView, offset, vector) {
let off = writeFloatBinary(dataView, offset, vector[0]);
off = writeFloatBinary(dataView, off, vector[1]);
return writeFloatBinary(dataView, off, vector[2]);
}
// ----------------------------------------------------------------------------
// vtkSTLWriter methods
// ----------------------------------------------------------------------------
const binaryWriter = () => {
let offset = 0;
let dataView = null;
return {
init: (polyData) => {
const polys = polyData.getPolys().getData();
const buffer = new ArrayBuffer(80 + 4 + (50 * polys.length) / 4); // buffer for the full file; size = header (80) + num cells (4) + 50 bytes per poly
dataView = new DataView(buffer);
},
writeHeader: (polyData) => {
offset += 80; // Header is empty // TODO: could add date, version, package
// First need to write the number of cells
dataView.setUint32(offset, polyData.getNumberOfCells(), true);
offset += 4;
},
writeTriangle: (v1, v2, v3, dn) => {
offset = writeVectorBinary(dataView, offset, dn);
offset = writeVectorBinary(dataView, offset, v1);
offset = writeVectorBinary(dataView, offset, v2);
offset = writeVectorBinary(dataView, offset, v3);
offset += 2; // unused 'attribute byte count' is a Uint16
},
writeFooter: (polyData) => {},
getOutputData: () => dataView,
};
};
const asciiWriter = () => {
let file = '';
return {
init: (polyData) => {},
writeHeader: (polyData) => {
file += 'solid ascii\n';
},
writeTriangle: (v1, v2, v3, dn) => {
file += ` facet normal ${dn[0].toPrecision(6)} ${dn[1].toPrecision(
6
)} ${dn[2].toPrecision(6)}\n`;
file += ' outer loop\n';
file += ` vertex ${v1[0].toPrecision(6)} ${v1[1].toPrecision(
6
)} ${v1[2].toPrecision(6)}\n`;
file += ` vertex ${v2[0].toPrecision(6)} ${v2[1].toPrecision(
6
)} ${v2[2].toPrecision(6)}\n`;
file += ` vertex ${v3[0].toPrecision(6)} ${v3[1].toPrecision(
6
)} ${v3[2].toPrecision(6)}\n`;
file += ' endloop\n';
file += ' endfacet\n';
},
writeFooter: (polyData) => {
file += 'endsolid\n';
},
getOutputData: () => file,
};
};
function writeSTL(polyData, format = FormatTypes.BINARY, transform = null) {
let writer = null;
if (format === FormatTypes.BINARY) {
writer = binaryWriter();
} else if (format === FormatTypes.ASCII) {
writer = asciiWriter();
} else {
vtkErrorMacro('Invalid format type');
}
writer.init(polyData);
writer.writeHeader(polyData);
const polys = polyData.getPolys().getData();
const points = polyData.getPoints().getData();
const strips = polyData.getStrips() ? polyData.getStrips().getData() : null;
const n = [];
let v1 = [];
let v2 = [];
let v3 = [];
// Strips
if (strips && strips.length > 0) {
throw new Error('Unsupported strips');
}
// Polys
for (let i = 0; i < polys.length; ) {
const pointNumber = polys[i++];
if (pointNumber) {
v1 = [
points[polys[i] * 3],
points[polys[i] * 3 + 1],
points[polys[i++] * 3 + 2],
];
v2 = [
points[polys[i] * 3],
points[polys[i] * 3 + 1],
points[polys[i++] * 3 + 2],
];
v3 = [
points[polys[i] * 3],
points[polys[i] * 3 + 1],
points[polys[i++] * 3 + 2],
];
if (transform) {
vec3.transformMat4(v1, v1, transform);
vec3.transformMat4(v2, v2, transform);
vec3.transformMat4(v3, v3, transform);
}
vtkTriangle.computeNormal(v1, v2, v3, n);
writer.writeTriangle(v1, v2, v3, n);
}
}
writer.writeFooter(polyData);
return writer.getOutputData();
}
// ----------------------------------------------------------------------------
// Static API
// ----------------------------------------------------------------------------
export const STATIC = {
writeSTL,
};
// ----------------------------------------------------------------------------
// vtkSTLWriter methods
// ----------------------------------------------------------------------------
function vtkSTLWriter(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkSTLWriter');
publicAPI.requestData = (inData, outData) => {
const input = inData[0];
if (!input || input.getClassName() !== 'vtkPolyData') {
vtkErrorMacro('Invalid or missing input');
return;
}
outData[0] = writeSTL(input, model.format, model.transform);
};
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
format: FormatTypes.BINARY,
transform: null,
};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Make this a VTK object
macro.obj(publicAPI, model);
// Also make it an algorithm with one input and one output
macro.algo(publicAPI, model, 1, 1);
macro.setGet(publicAPI, model, ['format', 'transform']);
// Object specific methods
vtkSTLWriter(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(extend, 'vtkSTLWriter');
// ----------------------------------------------------------------------------
export default { newInstance, extend, ...STATIC };
|