/// <summary>
/// Clears out all sub-meshes.
/// </summary>
public void ClearSubMeshes()
{
subMeshCount = 0;
triangles.Resize(0);
}
/// <summary>
/// Remove vertices and mark deleted triangles
/// </summary>
private void RemoveVertexPass(int startTrisCount, int targetTrisCount, double threshold, ResizableArray <bool> deleted0, ResizableArray <bool> deleted1, ref int deletedTris)
{
var triangles = this.triangles.Data;
int triangleCount = this.triangles.Length;
var vertices = this.vertices.Data;
Vertex v0, v1;
Vector3d p;
for (int i = 0; i < triangleCount; i++)
{
var t = triangles[i];
if (t.dirty || t.deleted || t.err3 > threshold)
{
continue;
}
t.GetErrors(errArr);
for (int j = 0; j < 3; j++)
{
if (errArr[j] > threshold)
{
continue;
}
int i0 = t[j];
int i1 = t[(j + 1) % 3];
v0 = vertices[i0];
v1 = vertices[i1];
// Border check
if (v0.border != v1.border)
{
continue;
}
// If borders should be kept
if (keepBorders && (v0.border || v1.border))
{
continue;
}
// Compute vertex to collapse to
CalculateError(i0, i1, out p);
deleted0.Resize(v0.tcount); // normals temporarily
deleted1.Resize(v1.tcount); // normals temporarily
// Don't remove if flipped
if (Flipped(p, i0, i1, ref v0, deleted0))
{
continue;
}
if (Flipped(p, i1, i0, ref v1, deleted1))
{
continue;
}
// Not flipped, so remove edge
v0.p = p;
v0.q += v1.q;
vertices[i0] = v0;
MergeVertices(i0, i1);
int tstart = refs.Length;
UpdateTriangles(i0, ref v0, deleted0, ref deletedTris);
UpdateTriangles(i0, ref v1, deleted1, ref deletedTris);
int tcount = refs.Length - tstart;
if (tcount <= v0.tcount)
{
// save ram
if (tcount > 0)
{
var refsArr = refs.Data;
Array.Copy(refsArr, tstart, refsArr, v0.tstart, tcount);
}
}
else
{
// append
vertices[i0].tstart = tstart;
}
vertices[i0].tcount = tcount;
break;
}
// Check if we are already done
if ((startTrisCount - deletedTris) <= targetTrisCount)
{
break;
}
}
}
public void Resize(int length, bool trimExess = false)
{
deltaVertices.Resize(length, trimExess);
deltaNormals.Resize(length, trimExess);
deltaTangents.Resize(length, trimExess);
}