void IMeshOptimiser.Apply(float[] originalVertexBuffer, ushort[] originalIndexBuffer, MeshElement meshElement)
{
_vertexDeclaration = meshElement.VertexDeclaration;
_meshElement = meshElement;
_originalIndexBuffer = originalIndexBuffer;
unsmoothedChannels = new List<VertexChannel>();
Dictionary<int, List<int>> smoothingCandidates = new Dictionary<int, List<int>>();
foreach (VertexChannel channel in _vertexDeclaration.channels)
{
if (channel.Name != "NORMAL" && channel.Name != "TANGENT" && channel.Name != "BITANGENT")
unsmoothedChannels.Add(channel);
}
List<int> uniqueVertices = new List<int>(meshElement.VertexCount);
for (int i = 0; i < meshElement.VertexCount; ++i)
{
int matching = -1;
foreach (int j in uniqueVertices)
{
if (ChannelsMatch(i, j))
{
matching = j;
break;
}
}
if (matching >= 0)
{
if (smoothingCandidates.ContainsKey(matching))
{
smoothingCandidates[matching].Add(i);
}
else
{
smoothingCandidates.Add(matching, new List<int>());
smoothingCandidates[matching].Add(i);
}
}
else
{
uniqueVertices.Add(i);
}
}
_optimisedVertexBuffer = new float[uniqueVertices.Count * _vertexDeclaration.Stride];
_optimisedIndexBuffer = new ushort[originalIndexBuffer.Length];
for (int i = 0; i < uniqueVertices.Count; ++i)
{
MeshHelper.CopyFloatArray(originalVertexBuffer, uniqueVertices[i] * _vertexDeclaration.Stride, _optimisedVertexBuffer, i * _vertexDeclaration.Stride, _vertexDeclaration.Stride);
ChangeIndices(uniqueVertices[i], i);
if (smoothingCandidates.ContainsKey(uniqueVertices[i]))
{
foreach (int j in smoothingCandidates[uniqueVertices[i]])
{
if (meshElement.VertexDeclaration.ContainsChannel("TANGENT"))
{
float[] tangent = meshElement.ReadAttribute("TANGENT", j);
MeshHelper.AddFloatArray(tangent, 0, _optimisedVertexBuffer, i * _vertexDeclaration.Stride + _vertexDeclaration.GetChannel("TANGENT").Offset, 3);
float[] bitangent = meshElement.ReadAttribute("BITANGENT", j);
MeshHelper.AddFloatArray(bitangent, 0, _optimisedVertexBuffer, i * _vertexDeclaration.Stride + _vertexDeclaration.GetChannel("BITANGENT").Offset, 3);
}
float[] normal = meshElement.ReadAttribute("NORMAL", j);
MeshHelper.AddFloatArray(normal, 0, _optimisedVertexBuffer, i * _vertexDeclaration.Stride + _vertexDeclaration.GetChannel("NORMAL").Offset, 3);
ChangeIndices(j, i);
}
}
MeshHelper.Normalize(_optimisedVertexBuffer, i * _vertexDeclaration.Stride + _vertexDeclaration.GetChannel("NORMAL").Offset, 3);
if (meshElement.VertexDeclaration.ContainsChannel("TANGENT"))
{
MeshHelper.Normalize(_optimisedVertexBuffer, i * _vertexDeclaration.Stride + _vertexDeclaration.GetChannel("TANGENT").Offset, 3);
MeshHelper.Normalize(_optimisedVertexBuffer, i * _vertexDeclaration.Stride + _vertexDeclaration.GetChannel("BITANGENT").Offset, 3);
}
}
}
private void CreateArrays(bool generateTangents)
{
if (generateTangents && _vertexDeclaration.ContainsChannel("TEXCOORD"))
{
Console.WriteLine("generating tangent frames....");
List<VertexChannel> originalChannels = new List<VertexChannel>();
foreach (VertexChannel channel in _vertexDeclaration.channels)
{
originalChannels.Add(channel);
}
originalChannels.Add(new VertexChannel("TANGENT", _vertexDeclaration.Stride, 3));
originalChannels.Add(new VertexChannel("BITANGENT", _vertexDeclaration.Stride + 3, 3));
_vertexDeclaration = new VertexDeclaration(originalChannels);
vertexData = new float[_vertexDeclaration.Stride * tris.Length * 3];
indexData = new ushort[tris.Length * 3];
int offset = 0;
for (int i = 0; i < tris.Length; ++i)
{
for (int j = 0; j < 3; ++j)
{
tris[i][j].ToArray().CopyTo(vertexData, offset * _vertexDeclaration.Stride);
indexData[i * 3 + j] = (ushort)offset;
int tangentOffset = _vertexDeclaration.GetChannel("TANGENT").Offset;
GenerateTangents(tris[i], j).CopyTo(vertexData, (offset * _vertexDeclaration.Stride) + tangentOffset);
++offset;
}
}
}
else
{
vertexData = new float[_vertexDeclaration.Stride * tris.Length * 3];
indexData = new ushort[tris.Length * 3];
int offset = 0;
for (int i = 0; i < tris.Length; ++i)
{
for (int j = 0; j < 3; ++j)
{
tris[i][j].ToArray().CopyTo(vertexData, offset * _vertexDeclaration.Stride);
indexData[i * 3 + j] = (ushort)offset;
++offset;
}
}
}
}
