private void AddTriangleToGroup(MeshBasedBakeGroup group, int triangleIndex)
{
group.triangleIndices.Add(triangleIndex);
triangleIndex *= 3;
group.vertexIndices.Add(triangles[triangleIndex++]);
group.vertexIndices.Add(triangles[triangleIndex++]);
group.vertexIndices.Add(triangles[triangleIndex]);
}
private int[] RetriveTrianglesFromGroup(MeshBasedBakeGroup group)
{
var triangles = this.triangles.ToArray();
int numberOfTriangles = group.triangleIndices.Count;
int resultSize = numberOfTriangles * 3;
var result = new int[resultSize];
int i = 0;
foreach (int triangleIndex in group.triangleIndices)
{
System.Array.Copy(triangles, 3 * triangleIndex, result, i, 3);
i += 3;
}
return(result);
}
/// <summary>
/// Splits result triangles into groups by their connections.
/// </summary>
/// <returns>The result triangles splited into groups.</returns>
public int[][] GroupTrianglesByConnection()
{
var groups = new HashSet <MeshBasedBakeGroup>();
int numberOfTriangles = triangles.Count / 3;
for (int t = 0; t < numberOfTriangles; t++)
{
var connectedGroups = FindConnectedGroups(t, groups);
if (connectedGroups.Count == 0)
{
var group = new MeshBasedBakeGroup();
AddTriangleToGroup(group, t);
groups.Add(group);
}
else if (connectedGroups.Count == 1)
{
foreach (var connectedGroup in connectedGroups)
{
AddTriangleToGroup(connectedGroup, t);
}
}
else
{
var group = new MeshBasedBakeGroup();
AddTriangleToGroup(group, t);
foreach (var connectedGroup in connectedGroups)
{
groups.Remove(connectedGroup);
group.vertexIndices.UnionWith(connectedGroup.vertexIndices);
group.triangleIndices.UnionWith(connectedGroup.triangleIndices);
}
groups.Add(group);
}
}
return(GrupsToArray(groups));
}
