static Texture LoadTexture(Assimp.Material M)
{
Texture Result = null;
var textures = M.GetAllMaterialTextures();
foreach (var tex in textures)
{
var path = tex.FilePath;
if (path != "")
{
try
{
int id = (path.IndexOf("./"));
if (id >= 0)
{
path = path.Remove(id, 2);
}
path = System.IO.Path.GetFileName(path);
Result = new Texture();
Result.LoadFromFile(BaseDir + "\\" + path);
}
catch (Exception E)
{
System.Windows.Forms.MessageBox.Show(E.Message);
}
}
}
return(Result);
}
private static Material CreateMaterialFromAiMaterial(Ai.Material aiMaterial, TextureSet textureSet, string texturesDirectoryPath)
{
var material = new Material {
Name = aiMaterial.Name
};
foreach (string shaderName in Material.ShaderNames)
{
if (material.Name.IndexOf(shaderName, StringComparison.OrdinalIgnoreCase) == -1)
{
continue;
}
material.ShaderName = shaderName == "CHARA" ? "SKIN" : shaderName;
break;
}
material.Diffuse = aiMaterial.HasColorDiffuse ? aiMaterial.ColorDiffuse.ToMML() : material.Diffuse;
material.Ambient = aiMaterial.HasColorAmbient ? aiMaterial.ColorAmbient.ToMML() : material.Ambient;
material.Specular = aiMaterial.HasColorSpecular ? aiMaterial.ColorSpecular.ToMML() : material.Specular;
material.Emission = aiMaterial.HasColorEmissive ? aiMaterial.ColorEmissive.ToMML() : material.Emission;
material.Shininess = aiMaterial.HasShininess ? aiMaterial.Shininess : material.Shininess;
if (material.ShaderName == "HAIR")
{
material.AnisoDirection = AnisoDirection.V;
}
material.DoubleSided = aiMaterial.HasTwoSided ? aiMaterial.IsTwoSided : material.DoubleSided;
foreach (var aiTextureSlot in aiMaterial.GetAllMaterialTextures())
{
CreateMaterialTextureFromAiTextureSlot(aiTextureSlot, aiMaterial, material, textureSet, texturesDirectoryPath);
}
if (material.Flags.HasFlag(MaterialFlags.Normal))
{
material.BumpMapType = material.Flags.HasFlag(MaterialFlags.Environment) ? BumpMapType.Env : BumpMapType.Dot;
}
if (material.Flags.HasFlag(MaterialFlags.Specular))
{
material.LineLight = 5;
}
if (material.Flags.HasFlag(MaterialFlags.Environment))
{
material.Flags |= MaterialFlags.ColorL1Alpha | MaterialFlags.ColorL2Alpha | MaterialFlags.OverrideIBL;
}
// HAIR without normal map causes the whole screen to become black.
// TODO: Automatically add a flat normal map in this case.
if (material.ShaderName == "HAIR" && !material.Flags.HasFlag(MaterialFlags.Normal))
{
material.ShaderName = "BLINN";
}
material.SortMaterialTextures();
return(material);
}
public Model Load(AssetManager assetManager, RenderContext renderContext, Stream stream, string sourcePath)
{
Scene scene = Importer.ImportFile(sourcePath, PostProcessSteps.Triangulate | PostProcessSteps.FlipUVs);
if (scene == null || scene.SceneFlags.HasFlag(SceneFlags.Incomplete) || scene.RootNode == null)
{
throw new Exception("Assimp Error.");
}
var meshes = new List <Mesh>();
string directory = Path.GetDirectoryName(sourcePath);
Texture2D LoadFromTextureSlot(TextureSlot textureSlot, TextureType textureType)
{
var texture = assetManager.Load <Texture2D>(Path.Combine(directory, textureSlot.FilePath));
texture.SetInfoFromTextureSlot(renderContext, ref textureSlot);
texture.SetMinFilter(renderContext, TextureMinFilter.NearestMipmapLinear);
return(texture);
}
List <Texture2D> LoadMaterialTextures(AssimpMaterial material, TextureType textureType)
{
List <Texture2D> textures = new List <Texture2D>();
for (int i = 0; i < material.GetMaterialTextureCount(textureType); i++)
{
material.GetMaterialTexture(textureType, i, out var textureSlot);
if (textureSlot.FilePath != null)
{
if (textureSlot.FilePath.Contains("*"))
{
throw new InvalidOperationException();
}
var texture = assetManager.Load <Texture2D>(Path.Combine(directory, textureSlot.FilePath));
texture.SetInfoFromTextureSlot(renderContext, ref textureSlot);
textures.Add(texture);
}
}
return(textures);
}
Mesh ProcessMesh(AssimpMesh mesh, System.Numerics.Matrix4x4 transformMatrix)
{
VertexPositionNormalTexture[] vertices = new VertexPositionNormalTexture[mesh.VertexCount];
List <uint> indices = new List <uint>();
// Process vertices
for (int i = 0; i < mesh.VertexCount; i++)
{
Vector3D position = mesh.Vertices[i];
vertices[i].Position = Unsafe.As <Vector3D, Vector3>(ref position);
Vector3D normal = mesh.Normals[i];
vertices[i].Normal = Unsafe.As <Vector3D, Vector3>(ref normal);
if (mesh.HasTextureCoords(0))
{
Vector3D texCoord = mesh.TextureCoordinateChannels[0][i];
vertices[i].TexCoord = new Vector2(texCoord.X, 1 - texCoord.Y);
}
}
// Process indices
for (int i = 0; i < mesh.FaceCount; i++)
{
AssimpFace face = mesh.Faces[i];
for (int j = 0; j < face.IndexCount; j++)
{
indices.Add((uint)face.Indices[j]);
}
}
Mesh.MeshTextureInfo textures = new Mesh.MeshTextureInfo();
// Process Material
if (mesh.MaterialIndex >= 0)
{
AssimpMaterial material = scene.Materials[mesh.MaterialIndex];
var texturezzz = material.GetAllMaterialTextures();
texturezzz = texturezzz.Where(x => x.FilePath != null).ToArray();
if (material.HasTextureDiffuse)
{
textures.Diffuse = LoadFromTextureSlot(material.TextureDiffuse, TextureType.Diffuse);
}
if (material.HasTextureSpecular)
{
textures.Specular = LoadFromTextureSlot(material.TextureSpecular, TextureType.Specular);
}
if (material.HasTextureLightMap)
{
textures.MetallicRoughness = LoadFromTextureSlot(material.TextureLightMap, TextureType.Lightmap);
}
}
return(new Mesh(renderContext, vertices, indices.ToArray(), textures, transformMatrix));
}
void ProcessNode(Node node, System.Numerics.Matrix4x4 transform)
{
var t = node.Transform;
var thisTransform = Unsafe.As <Matrix4x4, System.Numerics.Matrix4x4>(ref t);
// Process all of the node's meshes
for (int i = 0; i < node.MeshCount; i++)
{
AssimpMesh mesh = scene.Meshes[node.MeshIndices[i]];
meshes.Add(ProcessMesh(mesh, transform * thisTransform));
}
// Recurse
for (int i = 0; i < node.ChildCount; i++)
{
ProcessNode(node.Children[i], transform * thisTransform);
}
}
ProcessNode(scene.RootNode, System.Numerics.Matrix4x4.Identity);
return(new Model(meshes.ToArray()));
}
private static SystemMaterial ConvertMaterial(AssimpMaterial aMaterial, string path)
{
MaterialGroup material = new MaterialGroup();
if (aMaterial.HasColorDiffuse)
{
material.Children.Add(new DiffuseMaterial(new SolidColorBrush(
ConvertColor(aMaterial.ColorDiffuse, aMaterial))));
}
if (aMaterial.HasColorEmissive)
{
material.Children.Add(new EmissiveMaterial(new SolidColorBrush(
ConvertColor(aMaterial.ColorEmissive, aMaterial))));
}
if (aMaterial.HasColorSpecular)
{
material.Children.Add(new SpecularMaterial(new SolidColorBrush(
ConvertColor(aMaterial.ColorSpecular, aMaterial)), aMaterial.Shininess));
}
// Textures
TextureSlot[] textures = aMaterial.GetAllMaterialTextures();
foreach (TextureSlot texture in textures)
{
string imageFile = Path.Combine(path, texture.FilePath);
if (File.Exists(imageFile))
{
//material.Children.Clear();
ImageBrush brush = new ImageBrush(new BitmapImage(new Uri(imageFile)));
brush.ViewportUnits = BrushMappingMode.Absolute;
material.Children.Add(new DiffuseMaterial(brush));
}
}
if (material.Children.Count <= 0)
{
// paranoia: no material defined
// -> add default-material
material.Children.Add(new DiffuseMaterial(Brushes.DarkGray));
}
return material;
}