private void LoadFromNode(Assimp.Scene _scene, Assimp.Node _node, GraphicsDevice _device, SharpDX.Toolkit.Content.ContentManager _content, Matrix _transform)
{
// Sum up transformations recursively
_transform = FromMatrix(_node.Transform) * _transform;
Matrix transformInvTr = Helpers.CreateInverseTranspose(ref _transform);
// Recursive load from scene
if (_node.HasChildren)
{
foreach (Assimp.Node node in _node.Children)
{
LoadFromNode(_scene, node, _device, _content, _transform);
}
}
if (_node.HasMeshes)
{
foreach (int meshIndex in _node.MeshIndices)
{
Assimp.Mesh mesh = _scene.Meshes[meshIndex];
ModelMesh modelMesh = new ModelMesh();
// if mesh has a diffuse texture extract it
Assimp.Material material = _scene.Materials[mesh.MaterialIndex];
if (material != null && material.GetTextureCount(TextureType.Diffuse) > 0)
{
TextureSlot texture = material.GetTexture(TextureType.Diffuse, 0);
// Create new texture for mesh
var dxtexture = _content.Load <Texture2D>(texture.FilePath);
modelMesh.DiffuseTexture = dxtexture;
}
// Position is mandarory
if (!mesh.HasVertices)
{
throw new Exception("Model::Model(): Model has no vertices.");
}
// Determine the elements in the vertex
bool hasTexCoords = mesh.HasTextureCoords(0);
bool hasColors = mesh.HasVertexColors(0);
bool hasNormals = mesh.HasNormals;
bool hasTangents = mesh.Tangents != null;
bool hasBitangents = mesh.BiTangents != null;
int numElements = 1 + (hasTexCoords ? 1 : 0) + (hasColors ? 1 : 0) + (hasNormals ? 1 : 0) + (hasTangents ? 1 : 0) + (hasBitangents ? 1 : 0);
// Create vertex element list: Here starts the section of creating SharpDX stuff
VertexElement[] vertexElements = new VertexElement[numElements];
uint elementIndex = 0;
vertexElements[elementIndex++] = new VertexElement("POSITION", 0, SharpDX.DXGI.Format.R32G32B32_Float, 0);
int vertexSize = Utilities.SizeOf <Vector3>();
if (hasColors)
{
vertexElements[elementIndex++] = new VertexElement("COLOR", 0, SharpDX.DXGI.Format.R8G8B8A8_UInt, vertexSize);
vertexSize += Utilities.SizeOf <Color>();
}
if (hasNormals)
{
vertexElements[elementIndex++] = new VertexElement("NORMAL", 0, SharpDX.DXGI.Format.R32G32B32_Float, vertexSize);
vertexSize += Utilities.SizeOf <Vector3>();
}
if (hasTangents)
{
vertexElements[elementIndex++] = new VertexElement("TANGENT", 0, SharpDX.DXGI.Format.R32G32B32_Float, vertexSize);
vertexSize += Utilities.SizeOf <Vector3>();
}
if (hasBitangents)
{
vertexElements[elementIndex++] = new VertexElement("BITANGENT", 0, SharpDX.DXGI.Format.R32G32B32_Float, vertexSize);
vertexSize += Utilities.SizeOf <Vector3>();
}
if (hasTexCoords)
{
vertexElements[elementIndex++] = new VertexElement("TEXCOORD", 0, SharpDX.DXGI.Format.R32G32_Float, vertexSize);
vertexSize += Utilities.SizeOf <Vector2>();
}
// Set the vertex elements and size
modelMesh.InputLayout = VertexInputLayout.New(VertexBufferLayout.New(0, vertexElements));
modelMesh.VertexSize = vertexSize;
// Determine primitive type
switch (mesh.PrimitiveType)
{
case Assimp.PrimitiveType.Point: modelMesh.PrimitiveTopology = SharpDX.Toolkit.Graphics.PrimitiveType.PointList; break;
case Assimp.PrimitiveType.Line: modelMesh.PrimitiveTopology = SharpDX.Toolkit.Graphics.PrimitiveType.LineList; break;
case Assimp.PrimitiveType.Triangle: modelMesh.PrimitiveTopology = SharpDX.Toolkit.Graphics.PrimitiveType.TriangleList; break;
default: throw new Exception("Model::Model(): Unknown primitive type");
}
// Create data stream for vertices
//System.IO.MemoryStream vertexStream = new System.IO.MemoryStream(mesh.VertexCount * vertexSize);
DataStream vertexStream = new DataStream(mesh.VertexCount * vertexSize, true, true);
for (int i = 0; i < mesh.VertexCount; i++)
{
vertexStream.Write <Vector3>(Helpers.Transform(FromVector(mesh.Vertices[i]), ref _transform));
if (hasColors)
{
vertexStream.Write <Color>(FromColor(mesh.GetVertexColors(0)[i]));
}
if (hasNormals)
{
vertexStream.Write <Vector3>(Helpers.Transform(FromVector(mesh.Normals[i]), ref transformInvTr));
}
if (hasTangents)
{
vertexStream.Write <Vector3>(Helpers.Transform(FromVector(mesh.Tangents[i]), ref transformInvTr));
}
if (hasBitangents)
{
vertexStream.Write <Vector3>(Helpers.Transform(FromVector(mesh.BiTangents[i]), ref transformInvTr));
}
if (hasTexCoords)
{
vertexStream.Write <Vector2>(new Vector2(mesh.GetTextureCoords(0)[i].X, mesh.GetTextureCoords(0)[i].Y));
}
}
vertexStream.Position = 0;
// Create new vertex buffer
var vertexBuffer = SharpDX.Toolkit.Graphics.Buffer.Vertex.New(_device, vertexStream);
// Add it to the mesh
modelMesh.VertexBuffer = vertexBuffer;
modelMesh.VertexCount = mesh.VertexCount;
modelMesh.PrimitiveCount = mesh.FaceCount;
// Create new index buffer
var indexBuffer = SharpDX.Toolkit.Graphics.Buffer.Index.New(_device, mesh.GetIndices());
// Add it to the mesh
modelMesh.IndexBuffer = indexBuffer;
modelMesh.IndexCount = mesh.GetIndices().GetLength(0);
m_meshes.Add(modelMesh);
}
}
}
private void Load(AssetLoadContext context, Scene scene)
{
Node[] nodes = new[] { scene.RootNode };
if (scene.RootNode.ChildCount > 0)
{
nodes = scene.RootNode.Children;
}
List <ModelMesh> meshList = new List <ModelMesh>();
for (int i = 0; i < nodes.Length; i++)
{
Node node = nodes[i];
if (!node.HasMeshes)
{
continue;
}
for (int j = 0; j < node.MeshCount; j++)
{
Mesh mesh = scene.Meshes[node.MeshIndices[j]];
Vertex[] vertices = new Vertex[mesh.VertexCount];
Assimp.Material assimpMaterial = null;
Texture2D diffuseTexture = null;
Texture2D specularTexture = null;
Texture2D emissiveTexture = null;
Texture2D normalMap = null;
if (scene.HasMaterials && mesh.MaterialIndex >= 0)
{
assimpMaterial = scene.Materials[mesh.MaterialIndex];
diffuseTexture = LoadTexture(context, assimpMaterial.GetTexture(Assimp.TextureType.Diffuse, 0));
specularTexture = LoadTexture(context, assimpMaterial.GetTexture(Assimp.TextureType.Specular, 0));
emissiveTexture = LoadTexture(context, assimpMaterial.GetTexture(Assimp.TextureType.Emissive, 0));
bool usedSRGB = Texture.UseSRGB;
Texture.UseSRGB = false; // We need "default" texture loading because normal maps are already linear space
normalMap = LoadTexture(context, assimpMaterial.GetTexture(Assimp.TextureType.Normals, 0));
Texture.UseSRGB = usedSRGB;
}
Vector3D[] texcoord0 = null;
Vector3D[] texcoord1 = null;
if (mesh.HasTextureCoords(0))
{
texcoord0 = mesh.GetTextureCoords(0);
}
if (mesh.HasTextureCoords(1))
{
texcoord1 = mesh.GetTextureCoords(1);
}
uint[] indices = mesh.GetIndices();
for (int k = 0; k < mesh.VertexCount; k++)
{
Vertex vertex = new Vertex();
vertex.Position = new Vector3(
mesh.Vertices[k].X,
mesh.Vertices[k].Y,
mesh.Vertices[k].Z);
if (mesh.HasNormals)
{
vertex.Normal = new Vector3(
mesh.Normals[k].X,
mesh.Normals[k].Y,
mesh.Normals[k].Z);
}
if (texcoord0 != null)
{
vertex.UV = new Vector2(
texcoord0[k].X,
texcoord0[k].Y);
}
if (texcoord1 != null)
{
vertex.UV2 = new Vector2(
texcoord1[k].X,
texcoord1[k].Y);
}
if (mesh.HasTangentBasis)
{
vertex.Tangent = new Vector3(
mesh.Tangents[k].X,
mesh.Tangents[k].Y,
mesh.Tangents[k].Z);
vertex.BiTangent = new Vector3(
mesh.BiTangents[k].X,
mesh.BiTangents[k].Y,
mesh.BiTangents[k].Z);
}
vertices[k] = vertex;
}
OpenGL.Invoke(() =>
{
ModelMesh modelMesh = new ModelMesh(indices, vertices);
modelMesh.DiffuseTexture = diffuseTexture;
modelMesh.SpecularTexture = specularTexture;
modelMesh.EmissiveTexture = emissiveTexture;
modelMesh.NormalMap = normalMap;
meshList.Add(modelMesh);
});
}
}
this.meshes = meshList.ToArray();
}