/// <summary>
/// Creates a preview of the given <see cref="Unreal.Classes.SkeletalMesh"/>.
/// </summary>
/// <param name="Device">The Direct3D device to use for buffer creation.</param>
/// <param name="m">The mesh to generate a preview for.</param>
/// <param name="texcache">The texture cache for loading textures.</param>
public ModelPreview(Device Device, Unreal.Classes.SkeletalMesh m, PreviewTextureCache texcache)
{
// STEP 1: MATERIALS
Materials = new Dictionary <string, ModelPreviewMaterial>();
foreach (Unreal.Classes.MaterialInstanceConstant mat in m.MatInsts)
{
ModelPreviewMaterial material;
// TODO: pick what material class best fits based on what properties the
// MaterialInstanceConstant mat has.
// For now, just use the default material.
material = new TexturedPreviewMaterial(texcache, mat);
AddMaterial(material.Properties["Name"], material);
}
// STEP 2: LODS
LODs = new List <ModelPreviewLOD>();
foreach (Unreal.Classes.SkeletalMesh.LODModelStruct lodmodel in m.LODModels)
{
// Vertices
List <WorldVertex> vertices = new List <WorldVertex>();
foreach (Unreal.Classes.SkeletalMesh.GPUSkinVertexStruct vertex in lodmodel.VertexBufferGPUSkin.Vertices)
{
// NOTE: note the switched Y and Z coordinates. Unreal seems to think that Z is up.
vertices.Add(new WorldVertex(new Vector3(-vertex.Position.X, vertex.Position.Z, vertex.Position.Y), Vector3.Zero, new Vector2(HalfToFloat(vertex.U), HalfToFloat(vertex.V))));
}
// Triangles
List <Triangle> triangles = new List <Triangle>();
for (int i = 0; i < lodmodel.IndexBuffer.Indexes.Count; i += 3)
{
triangles.Add(new Triangle(lodmodel.IndexBuffer.Indexes[i], lodmodel.IndexBuffer.Indexes[i + 1], lodmodel.IndexBuffer.Indexes[i + 2]));
}
WorldMesh mesh = new WorldMesh(Device, triangles, vertices);
// Sections
List <ModelPreviewSection> sections = new List <ModelPreviewSection>();
foreach (Unreal.Classes.SkeletalMesh.SectionStruct section in lodmodel.Sections)
{
if (section.MaterialIndex < Materials.Count)
{
sections.Add(new ModelPreviewSection(Materials.Keys.ElementAt(section.MaterialIndex), (uint)section.BaseIndex, (uint)section.NumTriangles));
}
}
LODs.Add(new ModelPreviewLOD(mesh, sections));
}
}
/// <summary>
/// Creates a preview of the given <see cref="Unreal.Classes.SkeletalMesh"/>.
/// </summary>
/// <param name="Device">The Direct3D device to use for buffer creation.</param>
/// <param name="m">The mesh to generate a preview for.</param>
/// <param name="texcache">The texture cache for loading textures.</param>
public ModelPreview(Device Device, Unreal.Classes.SkeletalMesh m, PreviewTextureCache texcache)
{
// STEP 1: MATERIALS
for (int i = 0; i < m.Materials.Count; i++)
{
Unreal.Classes.MaterialInstanceConstant mat = m.MatInsts[i];
if (mat == null && m.Materials[i] < 0)
{
// The material instance is an import!
ImportEntry matImport = m.Export.FileRef.GetImport(m.Materials[i]);
var externalAsset = FindExternalAsset(matImport, texcache.cache.Select(x => x.TextureExport).ToList());
if (externalAsset != null)
{
mat = new MaterialInstanceConstant(externalAsset);
}
}
if (mat != null)
{
ModelPreviewMaterial material;
// TODO: pick what material class best fits based on what properties the
// MaterialInstanceConstant mat has.
// For now, just use the default material.
material = new TexturedPreviewMaterial(texcache, mat);
AddMaterial(material.Properties["Name"], material);
}
}
// STEP 2: LODS
foreach (Unreal.Classes.SkeletalMesh.LODModelStruct lodmodel in m.LODModels)
{
// Vertices
List <WorldVertex> vertices = new List <WorldVertex>();
if (m.Export.Game == MEGame.ME1)
{
foreach (Unreal.Classes.SkeletalMesh.GPUSkinVertexStruct vertex in lodmodel.VertexBufferGPUSkin.Vertices)
{
vertices.Add(new WorldVertex(new Vector3(-vertex.Position.X, vertex.Position.Z, vertex.Position.Y), Vector3.Zero, new Vector2(vertex.UFullPrecision, vertex.VFullPrecision)));
}
}
else
{
foreach (Unreal.Classes.SkeletalMesh.GPUSkinVertexStruct vertex in lodmodel.VertexBufferGPUSkin.Vertices)
{
// NOTE: note the switched Y and Z coordinates. Unreal seems to think that Z is up.
vertices.Add(new WorldVertex(new Vector3(-vertex.Position.X, vertex.Position.Z, vertex.Position.Y), Vector3.Zero, new Vector2(HalfToFloat(vertex.U), HalfToFloat(vertex.V))));
}
}
// Triangles
List <Triangle> triangles = new List <Triangle>();
for (int i = 0; i < lodmodel.IndexBuffer.Indexes.Count; i += 3)
{
triangles.Add(new Triangle(lodmodel.IndexBuffer.Indexes[i], lodmodel.IndexBuffer.Indexes[i + 1], lodmodel.IndexBuffer.Indexes[i + 2]));
}
WorldMesh mesh = new WorldMesh(Device, triangles, vertices);
// Sections
List <ModelPreviewSection> sections = new List <ModelPreviewSection>();
foreach (Unreal.Classes.SkeletalMesh.SectionStruct section in lodmodel.Sections)
{
if (section.MaterialIndex < Materials.Count)
{
sections.Add(new ModelPreviewSection(Materials.Keys.ElementAt(section.MaterialIndex), (uint)section.BaseIndex, (uint)section.NumTriangles));
}
}
LODs.Add(new ModelPreviewLOD(mesh, sections));
}
}
