Returned faces not on surface

[RichardFoss]

Hi, thank you for your code!
I have been using it to create a convex hull for speakers in an immersive sound system. I have given the relevant code below, and also the DBG output - apologies for the long listing. My concern is that triangles, indicated by the indices, are often not on the surface of the hull. Could I be doing something wrong? Speaker coords are in meters.

In header:
QuickHull<float> qh; std::vector<Vector3<float>> vertices; ConvexHull<FloatType> faces;

Part of code:
` for (int i = 0; i < noSpeakers; i++) {
vertices.emplace_back(speakers[i]->x, speakers[i]->y, speakers[i]->z);
}
DBG("Speakers";
for (int i = 0; i < noSpeakers; i++) {
DBG(i);
DBG(vertices[i].x);
DBG(vertices[i].y);
DBG(vertices[i].z);
}

DBG("size of vertices");
DBG(vertices.size());
faces = qh.getConvexHull(vertices, true, false);
const auto& indexBuffer = faces.getIndexBuffer();
const auto& vertexBuffer = faces.getVertexBuffer();

DBG("Index Buffer");
for (int i = 0; i < indexBuffer.size(); i=(i+3)) {
    DBG(indexBuffer[i]);
    DBG(indexBuffer[i+1]);
    DBG(indexBuffer[i+2]);
    DBG(" ");
}`

Speakers
Speaker:
0
4
1.77
Speaker:
9.60067e-09
3.89018
4.14666
Speaker:
-2
3.46
1.77
Speaker:
2
3.46
1.77
Speaker:
-1.94509
3.36489
4.14666
Speaker:
1.94509
3.36489
4.14666
Speaker:
-3.76
-1.37
1.77
Speaker:
3.76
-1.37
1.77
Speaker:
-3.6568
-1.33244
4.14666
Speaker:
3.6568
-1.33244
4.14666
Speaker:
2
-3.46
1.77
Speaker:
-2
-3.46
1.77
Speaker:
0
0.27
4.2
size of vertices
13
Index Buffer
0
2
1

1
2
3

3
2
4

2
5
4

5
6
4

6
3
4

6
7
3

7
1
3

7
0
1

0
7
8

8
7
9

7
6
9

9
6
10

6
5
10

5
11
10

11
9
10

11
8
9

8
11
12

11
0
12

0
8
12

0
11
2

2
11
5