private int[] GetMeshTriangles(Mesh meshData, uint vertCount)
{
IndexFormat format = GetIndexFormat(meshData);
int[] indices = new int[meshData.IndexCount];
switch (format)
{
case IndexFormat.UInt16:
for (int i = 0; i < meshData.IndexCount; i++)
{
// We reverse the indices otherwise our normals will be inverted.
indices[meshData.IndexCount - 1 - i] = Convert.ToInt32(vertCount + BitConverter.ToUInt16(meshData.IndexData, i * 2));
}
break;
case IndexFormat.UInt32:
for (int i = 0; i < meshData.IndexCount; i++)
{
// We reverse the indices otherwise our normals will be inverted.
indices[meshData.IndexCount - 1 - i] = Convert.ToInt32(vertCount + BitConverter.ToUInt32(meshData.IndexData, i * 4));
}
break;
default:
throw new ArgumentOutOfRangeException();
}
return indices;
}
private Material CreateMeshMaterial(Mesh mesh)
{
Texture2D diffuseTex = textureManager.GetTexture(mesh.BaseDiffuse);
Texture2D packedSpecTex = textureManager.GetTexture(mesh.SpecMap);
Texture2D normalTex = textureManager.GetTexture(mesh.BumpMap);
Material material = new Material(source);
if (diffuseTex != null)
{
material.SetTexture("_MainTex", diffuseTex);
material.SetTextureScale("_MainTex", new Vector2(1, -1));
}
if (packedSpecTex != null)
{
material.SetTexture("_PackedSpecular", packedSpecTex);
material.SetTextureScale("_PackedSpecular", new Vector2(1, -1));
}
if (normalTex != null)
{
material.SetTexture("_BumpMap", normalTex);
material.SetTextureScale("_BumpMap", new Vector2(1, -1));
}
return(material);
}
private void ReadVertexStream(Vector2[] targetArray, int arrayPos, Mesh meshData, VertexLayout.EntryInfo info)
{
Mesh.VertexStream stream = meshData.VertexStreams[info.streamIndex];
for (int i = 0; i < meshData.VertexCount; i++)
{
targetArray[i + arrayPos] = ReadVector2(info.offset, stream, i, info.dataType);
}
}
/// <summary>
/// Imports the mesh's vertex data.
/// </summary>
private void GetMeshVerts(Vector3[] verts, int arrayPos, Mesh meshData, VertexLayout vertexLayout)
{
VertexLayout.EntryInfo info;
bool vertsExist = vertexLayout.GetEntryInfo(VertexLayout.Entry.DataUsages.Position, 0, out info);
Assert.IsTrue(vertsExist);
ReadVertexStream(verts, arrayPos, meshData, info);
}
private void ProcessMesh(int arrayPos, Dme modelData, Mesh meshData, Vector3[] verts, Vector2[] uvs)
{
uint materialHash = modelData.Materials[(int)meshData.MaterialIndex].MaterialDefinitionHash;
MaterialDefinition materialDefinition = materialDefinitionManager.GetMaterial(materialHash);
uint vertexLayoutHash = materialDefinition.DrawStyles[DRAWSTYLE_INDEX].VertexLayoutNameHash;
VertexLayout vertexLayout = materialDefinitionManager.GetVertexLayout(vertexLayoutHash);
GetMeshVerts(verts, arrayPos, meshData, vertexLayout);
GetMeshUVs(uvs, arrayPos, meshData, vertexLayout);
}
private void GetMeshNormals(Vector3[] normals, int arrayPos, Mesh meshData, VertexLayout vertexLayout)
{
VertexLayout.EntryInfo info;
bool normalExists = vertexLayout.GetEntryInfo(VertexLayout.Entry.DataUsages.Normal, 0, out info);
if (normalExists)
{
ReadVertexStream(normals, arrayPos, meshData, info);
}
}
/// <summary>
/// Imports the mesh's texture coordinates.
/// </summary>
private void GetMeshUVs(Vector2[] uvs, int offset, Mesh meshData, VertexLayout vertexLayout)
{
VertexLayout.EntryInfo info;
bool uvsExist = vertexLayout.GetEntryInfo(VertexLayout.Entry.DataUsages.Texcoord, 0, out info);
if (uvsExist)
{
ReadVertexStream(uvs, offset, meshData, info);
}
}
private IndexFormat GetIndexFormat(Mesh meshData)
{
switch (meshData.IndexSize)
{
case 2:
return IndexFormat.UInt16;
case 4:
return IndexFormat.UInt32;
default:
throw new ArgumentOutOfRangeException("Unknown Index Format/Size: " + meshData.IndexSize);
}
}
public MeshData GenerateMeshData(Dme modelData)
{
MeshData meshData = new MeshData();
uint totalVerts = 0;
// Verts and UVs
foreach (Mesh mesh in modelData.Meshes)
{
totalVerts += mesh.VertexCount;
}
meshData.verts = new Vector3[totalVerts];
meshData.uvs = new Vector2[totalVerts];
int arrayPos = 0;
foreach (Mesh mesh in modelData.Meshes)
{
ProcessMesh(arrayPos, modelData, mesh, meshData.verts, meshData.uvs);
arrayPos += (int)mesh.VertexCount;
}
// Triangles
meshData.triangles = new int[modelData.Meshes.Count][];
uint vertCount = 0;
for (int i = 0; i < modelData.Meshes.Count; i++)
{
Mesh mesh = modelData.Meshes[i];
meshData.triangles[i] = GetMeshTriangles(mesh, vertCount);
vertCount += mesh.VertexCount;
}
meshData.IndexFormat = GetIndexFormat(modelData.Meshes[0]);
return meshData;
}
