/// <summary>
/// Inserts a new mesh and returns its index in MeshPointers.
/// </summary>
public static int InsertMesh(TR2Level level, TRMesh newMesh)
{
//get the final mesh we currently have
TRMesh lastMesh = level.Meshes[level.Meshes.Length - 1];
//new mesh pointer will be the current final mesh's pointer plus its length
newMesh.Pointer = lastMesh.Pointer + (uint)lastMesh.Serialize().Length;
List <TRMesh> meshes = level.Meshes.ToList();
meshes.Add(newMesh);
level.Meshes = meshes.ToArray();
List <uint> pointers = level.MeshPointers.ToList();
pointers.Add(newMesh.Pointer);
level.MeshPointers = pointers.ToArray();
level.NumMeshPointers++;
//NumMeshData needs the additional mesh size added
level.NumMeshData += (uint)newMesh.Serialize().Length / 2;
//the pointer index will be the final index in the array
return(level.MeshPointers.Length - 1);
}
/// <summary>
/// Duplicates the data from one mesh to another and ensures that the contents
/// of MeshPointers remains consistent with respect to the mesh lengths.
/// </summary>
public static void DuplicateMesh(TR2Level level, TRMesh originalMesh, TRMesh replacementMesh)
{
int oldLength = originalMesh.Serialize().Length;
originalMesh.Centre = replacementMesh.Centre;
originalMesh.CollRadius = replacementMesh.CollRadius;
originalMesh.ColouredRectangles = replacementMesh.ColouredRectangles;
originalMesh.ColouredTriangles = replacementMesh.ColouredTriangles;
originalMesh.Lights = replacementMesh.Lights;
originalMesh.Normals = replacementMesh.Normals;
originalMesh.NumColouredRectangles = replacementMesh.NumColouredRectangles;
originalMesh.NumColouredTriangles = replacementMesh.NumColouredTriangles;
originalMesh.NumNormals = replacementMesh.NumNormals;
originalMesh.NumTexturedRectangles = replacementMesh.NumTexturedRectangles;
originalMesh.NumTexturedTriangles = replacementMesh.NumTexturedTriangles;
originalMesh.NumVertices = replacementMesh.NumVertices;
originalMesh.TexturedRectangles = replacementMesh.TexturedRectangles;
originalMesh.TexturedTriangles = replacementMesh.TexturedTriangles;
originalMesh.Vertices = replacementMesh.Vertices;
// The length will have changed so all pointers above the original one will need adjusting
int lengthDiff = originalMesh.Serialize().Length - oldLength;
List <uint> pointers = level.MeshPointers.ToList();
int pointerIndex = pointers.IndexOf(originalMesh.Pointer);
for (int i = pointerIndex + 1; i < pointers.Count; i++)
{
if (pointers[i] > 0)
{
int newPointer = (int)pointers[i] + lengthDiff;
pointers[i] = (uint)newPointer;
}
}
level.MeshPointers = pointers.ToArray();
int numMeshData = (int)level.NumMeshData + lengthDiff / 2;
level.NumMeshData = (uint)numMeshData;
}