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fix(IFCImporter): optimize IFC parsing #3368

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fix(IFCImporter): optimize IFC parsing #3368

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72 changes: 38 additions & 34 deletions Sources/IO/Geometry/IFCImporter/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -45,14 +45,14 @@ function vtkIFCImporter(publicAPI, model) {
const pointValues = new Float32Array(vertices.length / 2);
const normalsArray = new Float32Array(vertices.length / 2);

for (let i = 0; i < vertices.length; i += 6) {
pointValues[i / 2] = vertices[i];
pointValues[i / 2 + 1] = vertices[i + 1];
pointValues[i / 2 + 2] = vertices[i + 2];

normalsArray[i / 2] = vertices[i + 3];
normalsArray[i / 2 + 1] = vertices[i + 4];
normalsArray[i / 2 + 2] = vertices[i + 5];
for (let i = 0, p = 0; i < vertices.length; i += 6, p += 3) {
pointValues[p] = vertices[i];
pointValues[p + 1] = vertices[i + 1];
pointValues[p + 2] = vertices[i + 2];

normalsArray[p] = vertices[i + 3];
normalsArray[p + 1] = vertices[i + 4];
normalsArray[p + 2] = vertices[i + 5];
}

const nCells = indices.length;
Expand Down Expand Up @@ -99,40 +99,44 @@ function vtkIFCImporter(publicAPI, model) {
.buildFromRadian()
.multiply3x3(mat3.fromMat4(mat3.create(), userMatrix));

for (let i = 0; i < vertices.length; i += 6) {
const point = [vertices[i], vertices[i + 1], vertices[i + 2]];
const normal = [vertices[i + 3], vertices[i + 4], vertices[i + 5]];
const point = [0, 0, 0];
const normal = [0, 0, 0];
for (let i = 0, p = 0; i < vertices.length; i += 6, p += 3) {
point[0] = vertices[i];
point[1] = vertices[i + 1];
point[2] = vertices[i + 2];
normal[0] = vertices[i + 3];
normal[1] = vertices[i + 4];
normal[2] = vertices[i + 5];

transformMatrix.apply(point);
normalMatrix.apply(normal);

pointValues[i / 2] = point[0];
pointValues[i / 2 + 1] = point[1];
pointValues[i / 2 + 2] = point[2];
pointValues[p] = point[0];
pointValues[p + 1] = point[1];
pointValues[p + 2] = point[2];

normalsArray[i / 2] = normal[0];
normalsArray[i / 2 + 1] = normal[1];
normalsArray[i / 2 + 2] = normal[2];
normalsArray[p] = normal[0];
normalsArray[p + 1] = normal[1];
normalsArray[p + 2] = normal[2];

const colorIndex = i / 2;
colorArray[colorIndex] = color.x;
colorArray[colorIndex + 1] = color.y;
colorArray[colorIndex + 2] = color.z;
colorArray[p] = color.x;
colorArray[p + 1] = color.y;
colorArray[p + 2] = color.z;
}
} else {
for (let i = 0; i < vertices.length; i += 6) {
pointValues[i / 2] = vertices[i];
pointValues[i / 2 + 1] = vertices[i + 1];
pointValues[i / 2 + 2] = vertices[i + 2];

normalsArray[i / 2] = vertices[i + 3];
normalsArray[i / 2 + 1] = vertices[i + 4];
normalsArray[i / 2 + 2] = vertices[i + 5];

const colorIndex = i / 2;
colorArray[colorIndex] = color.x;
colorArray[colorIndex + 1] = color.y;
colorArray[colorIndex + 2] = color.z;
for (let i = 0, p = 0; i < vertices.length; i += 6, p += 3) {
pointValues[p] = vertices[i];
pointValues[p + 1] = vertices[i + 1];
pointValues[p + 2] = vertices[i + 2];

normalsArray[p] = vertices[i + 3];
normalsArray[p + 1] = vertices[i + 4];
normalsArray[p + 2] = vertices[i + 5];

colorArray[p] = color.x;
colorArray[p + 1] = color.y;
colorArray[p + 2] = color.z;
}
}

Expand Down