public DX11IndexedGeometry LoadFromMesh(Assimp.Mesh mesh, AssimpLoadInformation loadInfo, bool allowRawView = false)
{
uint[] inds = mesh.GetIndices();
if (inds.Length > 0 && mesh.VertexCount > 0)
{
int vertexsize;
var layout = mesh.InputLayout(loadInfo, out vertexsize);
BoundingBox bb;
DataStream ds = mesh.LoadVertices(loadInfo, vertexsize, out bb);
DX11IndexedGeometry geom = new DX11IndexedGeometry(device)
{
HasBoundingBox = true,
BoundingBox = bb,
IndexBuffer = DX11IndexBuffer.CreateImmutable(device, inds, allowRawView),
InputLayout = layout,
PrimitiveType = "AssimpModel",
Tag = null,
Topology = SharpDX.Direct3D.PrimitiveTopology.TriangleList,
VertexBuffer = DX11VertexBuffer.CreateImmutable(device, mesh.VertexCount, vertexsize, ds, allowRawView)
};
ds.Dispose();
return(geom);
}
return(null);
}
public List <DX11IndexedGeometry> LoadModelsFromFile(string path, AssimpLoadInformation loadInfo)
{
Assimp.AssimpImporter importer = new AssimpImporter();
Scene scene = importer.ImportFile(path, PostProcessPreset.ConvertToLeftHanded | PostProcessPreset.TargetRealTimeQuality);
List <DX11IndexedGeometry> result = new List <DX11IndexedGeometry>();
for (int j = 0; j < scene.MeshCount; j++)
{
Assimp.Mesh mesh = scene.Meshes[j];
if (mesh.HasFaces && mesh.HasVertices)
{
result.Add(this.LoadFromMesh(mesh, loadInfo));
}
}
return(result);
}
public static DataStream LoadVertices(this Assimp.Mesh mesh, AssimpLoadInformation loadInfo, int vertexsize, out BoundingBox bb)
{
bb = new BoundingBox();
bb.Maximum = new Vector3(float.MinValue, float.MinValue, float.MinValue);
bb.Minimum = new Vector3(float.MaxValue, float.MaxValue, float.MaxValue);
DataStream ds = new DataStream(mesh.VertexCount * vertexsize, true, true);
for (int i = 0; i < mesh.VertexCount; i++)
{
var vert = mesh.Vertices[i];
ds.Write <Assimp.Vector3D>(vert);
bb.Minimum.X = vert.X < bb.Minimum.X ? vert.X : bb.Minimum.X;
bb.Minimum.Y = vert.Y < bb.Minimum.Y ? vert.Y : bb.Minimum.Y;
bb.Minimum.Z = vert.Z < bb.Minimum.Z ? vert.Z : bb.Minimum.Z;
bb.Maximum.X = vert.X > bb.Maximum.X ? vert.X : bb.Maximum.X;
bb.Maximum.Y = vert.Y > bb.Maximum.Y ? vert.Y : bb.Maximum.X;
bb.Maximum.Z = vert.Z > bb.Maximum.Z ? vert.Z : bb.Maximum.Z;
if (mesh.HasNormals && loadInfo.Normals)
{
ds.Write <Assimp.Vector3D>(mesh.Normals[i]);
}
if (mesh.HasTangentBasis && loadInfo.Tangents)
{
ds.Write <Assimp.Vector3D>(mesh.Tangents[i]);
ds.Write <Assimp.Vector3D>(mesh.BiTangents[i]);
}
if (loadInfo.VertexColors)
{
for (int j = 0; j < mesh.VertexColorChannelCount; j++)
{
ds.Write <Assimp.Color4D>(mesh.GetVertexColors(j)[i]);
}
}
if (loadInfo.TexCoords)
{
for (int j = 0; j < mesh.TextureCoordsChannelCount; j++)
{
int numcomp = mesh.GetUVComponentCount(j);
if (numcomp == 1)
{
ds.Write <float>(mesh.GetTextureCoords(j)[i].X);
}
if (numcomp == 2)
{
ds.Write <float>(mesh.GetTextureCoords(j)[i].X);
ds.Write <float>(mesh.GetTextureCoords(j)[i].Y);
}
if (numcomp == 3)
{
ds.Write <Assimp.Vector3D>(mesh.GetTextureCoords(j)[i]);
}
}
}
}
return(ds);
}
public static InputElement[] InputLayout(this Assimp.Mesh mesh, AssimpLoadInformation loadInfo, out int vertexsize)
{
List <InputElement> result = new List <InputElement>();
int offset = 0;
result.Add(new InputElement("POSITION", 0, Format.R32G32B32_Float, 0, 0));
offset += 12;
if (mesh.HasNormals && loadInfo.Normals)
{
result.Add(new InputElement("NORMAL", 0, Format.R32G32B32_Float, offset, 0));
offset += 12;
}
if (mesh.HasTangentBasis && loadInfo.Tangents)
{
result.Add(new InputElement("TANGENT", 0, Format.R32G32B32_Float, offset, 0));
offset += 12;
result.Add(new InputElement("BINORMAL", 0, Format.R32G32B32_Float, offset, 0));
offset += 12;
}
if (loadInfo.VertexColors)
{
for (int i = 0; i < mesh.VertexColorChannelCount; i++)
{
result.Add(new InputElement("COLOR", i, Format.R32G32B32A32_Float, offset, 0));
offset += 16;
}
}
if (loadInfo.TexCoords)
{
for (int i = 0; i < mesh.TextureCoordsChannelCount; i++)
{
int numcomp = mesh.GetUVComponentCount(i);
int stride = 4;
Format fmt = Format.R32_Float;
if (numcomp == 2)
{
fmt = Format.R32G32_Float;
stride = 8;
}
if (numcomp == 3)
{
fmt = Format.R32G32B32_Float;
stride = 12;
}
result.Add(new InputElement("TEXCOORD", i, fmt, offset, 0));
offset += stride;
}
}
if (mesh.HasBones && loadInfo.Bones)
{
result.Add(new InputElement("BLENDINDICES", 0, Format.R32G32B32A32_Float, offset, 0));
offset += 16;
result.Add(new InputElement("BLENDWEIGHT", 0, Format.R32G32B32A32_Float, offset, 0));
offset += 16;
}
vertexsize = offset;
return(result.ToArray());
}