public static bool ExportMesh(AssetItem item, string exportPath)
{
var m_Mesh = (Mesh)item.Asset;
if (m_Mesh.m_VertexCount <= 0)
{
return(false);
}
if (!TryExportFile(exportPath, item, ".obj", out var exportFullPath))
{
return(false);
}
var sb = new StringBuilder();
sb.AppendLine("g " + m_Mesh.m_Name);
#region Vertices
if (m_Mesh.m_Vertices == null || m_Mesh.m_Vertices.Length == 0)
{
return(false);
}
var c = 3;
if (m_Mesh.m_Vertices.Length == m_Mesh.m_VertexCount * 4)
{
c = 4;
}
for (var v = 0; v < m_Mesh.m_VertexCount; v++)
{
sb.AppendFormat("v {0} {1} {2}\r\n", -m_Mesh.m_Vertices[v * c], m_Mesh.m_Vertices[v * c + 1],
m_Mesh.m_Vertices[v * c + 2]);
}
#endregion
#region UV
if (m_Mesh.m_UV0?.Length > 0)
{
if (m_Mesh.m_UV0.Length == m_Mesh.m_VertexCount * 2)
{
c = 2;
}
else if (m_Mesh.m_UV0.Length == m_Mesh.m_VertexCount * 3)
{
c = 3;
}
for (var v = 0; v < m_Mesh.m_VertexCount; v++)
{
sb.AppendFormat("vt {0} {1}\r\n", m_Mesh.m_UV0[v * c], m_Mesh.m_UV0[v * c + 1]);
}
}
#endregion
#region Normals
if (m_Mesh.m_Normals?.Length > 0)
{
if (m_Mesh.m_Normals.Length == m_Mesh.m_VertexCount * 3)
{
c = 3;
}
else if (m_Mesh.m_Normals.Length == m_Mesh.m_VertexCount * 4)
{
c = 4;
}
for (var v = 0; v < m_Mesh.m_VertexCount; v++)
{
sb.AppendFormat("vn {0} {1} {2}\r\n", -m_Mesh.m_Normals[v * c], m_Mesh.m_Normals[v * c + 1],
m_Mesh.m_Normals[v * c + 2]);
}
}
#endregion
#region Face
var sum = 0;
for (var i = 0; i < m_Mesh.m_SubMeshes.Length; i++)
{
sb.AppendLine($"g {m_Mesh.m_Name}_{i}");
var indexCount = (int)m_Mesh.m_SubMeshes[i].indexCount;
var end = sum + indexCount / 3;
for (var f = sum; f < end; f++)
{
sb.AppendFormat("f {0}/{0}/{0} {1}/{1}/{1} {2}/{2}/{2}\r\n", m_Mesh.m_Indices[f * 3 + 2] + 1,
m_Mesh.m_Indices[f * 3 + 1] + 1, m_Mesh.m_Indices[f * 3] + 1);
}
sum = end;
}
#endregion
sb.Replace("NaN", "0");
File.WriteAllText(exportFullPath, sb.ToString());
return(true);
}
public static bool ExportTexture2D(AssetItem item, string exportPath)
{
var m_Texture2D = (Texture2D)item.Asset;
if (Properties.Settings.Default.convertTexture)
{
var bitmap = m_Texture2D.ConvertToBitmap(true);
if (bitmap == null)
{
return(false);
}
ImageFormat format = null;
var ext = Properties.Settings.Default.convertType;
var tga = false;
switch (ext)
{
case "BMP":
format = ImageFormat.Bmp;
break;
case "PNG":
format = ImageFormat.Png;
break;
case "JPEG":
format = ImageFormat.Jpeg;
break;
case "TGA":
tga = true;
break;
}
if (!TryExportFile(exportPath, item, "." + ext.ToLower(), out var exportFullPath))
{
return(false);
}
if (tga)
{
var file = new TGA(bitmap);
file.Save(exportFullPath);
}
else
{
try
{
bitmap.Save(exportFullPath, format);
bitmap.Dispose();
}
catch (ExternalException)
{
return(ExportTexture2D(item, exportPath));
}
}
return(true);
}
else
{
if (!TryExportFile(exportPath, item, ".tex", out var exportFullPath))
{
return(false);
}
File.WriteAllBytes(exportFullPath, m_Texture2D.image_data.GetData());
return(true);
}
}
private static bool TryExportFile(string dir, AssetItem item, string extension, out string fullPath)
{
return(TryExportFile(dir, item, extension, out fullPath, true));
}