public override Assimp.Node assimpExport(ref Assimp.Scene scn, ref Dictionary <int, int> meshImportStatus)
{
Assimp.Mesh amesh = new Assimp.Mesh();
Assimp.Node node;
amesh.Name = name;
int meshHash = meshVao.GetHashCode();
//TESTING
if (scn.MeshCount > 20)
{
node = base.assimpExport(ref scn, ref meshImportStatus);
return(node);
}
if (!meshImportStatus.ContainsKey(meshHash))
//if (false)
{
meshImportStatus[meshHash] = scn.MeshCount;
int vertcount = metaData.vertrend_graphics - metaData.vertrstart_graphics + 1;
MemoryStream vms = new MemoryStream(gobject.meshDataDict[metaData.Hash].vs_buffer);
MemoryStream ims = new MemoryStream(gobject.meshDataDict[metaData.Hash].is_buffer);
BinaryReader vbr = new BinaryReader(vms);
BinaryReader ibr = new BinaryReader(ims);
//Initialize Texture Component Channels
if (gobject.bufInfo[1] != null)
{
List <Assimp.Vector3D> textureChannel = new List <Assimp.Vector3D>();
amesh.TextureCoordinateChannels.Append(textureChannel);
amesh.UVComponentCount[0] = 2;
}
//Generate bones only for the joints related to the mesh
Dictionary <int, Assimp.Bone> localJointDict = new Dictionary <int, Assimp.Bone>();
//Export Bone Structure
if (Skinned)
//if (false)
{
for (int i = 0; i < meshVao.BoneRemapIndicesCount; i++)
{
int joint_id = meshVao.BoneRemapIndices[i];
//Fetch name
Joint relJoint = null;
foreach (Joint jnt in parentScene.jointDict.Values)
{
if (jnt.jointIndex == joint_id)
{
relJoint = jnt;
break;
}
}
//Generate bone
Assimp.Bone b = new Assimp.Bone();
if (relJoint != null)
{
b.Name = relJoint.name;
b.OffsetMatrix = MathUtils.convertMatrix(relJoint.invBMat);
}
localJointDict[i] = b;
amesh.Bones.Add(b);
}
}
//Write geometry info
vbr.BaseStream.Seek(0, SeekOrigin.Begin);
for (int i = 0; i < vertcount; i++)
{
Assimp.Vector3D v, vN;
for (int j = 0; j < gobject.bufInfo.Count; j++)
{
bufInfo buf = gobject.bufInfo[j];
if (buf is null)
{
continue;
}
switch (buf.semantic)
{
case 0: //vPosition
{
switch (buf.type)
{
case VertexAttribPointerType.HalfFloat:
uint v1 = vbr.ReadUInt16();
uint v2 = vbr.ReadUInt16();
uint v3 = vbr.ReadUInt16();
uint v4 = vbr.ReadUInt16();
//Transform vector with worldMatrix
v = new Assimp.Vector3D(Utils.Half.decompress(v1), Utils.Half.decompress(v2), Utils.Half.decompress(v3));
break;
case VertexAttribPointerType.Float: //This is used in my custom vbos
float f1 = vbr.ReadSingle();
float f2 = vbr.ReadSingle();
float f3 = vbr.ReadSingle();
//Transform vector with worldMatrix
v = new Assimp.Vector3D(f1, f2, f3);
break;
default:
throw new Exception("Unimplemented Vertex Type");
}
amesh.Vertices.Add(v);
break;
}
case 1: //uvPosition
{
Assimp.Vector3D uv;
uint v1 = vbr.ReadUInt16();
uint v2 = vbr.ReadUInt16();
uint v3 = vbr.ReadUInt16();
uint v4 = vbr.ReadUInt16();
//uint v4 = Convert.ToUInt16(vbr.ReadUInt16());
uv = new Assimp.Vector3D(Utils.Half.decompress(v1), Utils.Half.decompress(v2), 0.0f);
amesh.TextureCoordinateChannels[0].Add(uv); //Add directly to the first channel
break;
}
case 2: //nPosition
case 3: //tPosition
{
switch (buf.type)
{
case (VertexAttribPointerType.Float):
float f1, f2, f3;
f1 = vbr.ReadSingle();
f2 = vbr.ReadSingle();
f3 = vbr.ReadSingle();
vN = new Assimp.Vector3D(f1, f2, f3);
break;
case (VertexAttribPointerType.HalfFloat):
uint v1, v2, v3;
v1 = vbr.ReadUInt16();
v2 = vbr.ReadUInt16();
v3 = vbr.ReadUInt16();
vN = new Assimp.Vector3D(Utils.Half.decompress(v1), Utils.Half.decompress(v2), Utils.Half.decompress(v3));
break;
case (VertexAttribPointerType.Int2101010Rev):
int i1, i2, i3;
uint value;
byte[] a32 = new byte[4];
a32 = vbr.ReadBytes(4);
value = BitConverter.ToUInt32(a32, 0);
//Convert Values
i1 = _2sComplement.toInt((value >> 00) & 0x3FF, 10);
i2 = _2sComplement.toInt((value >> 10) & 0x3FF, 10);
i3 = _2sComplement.toInt((value >> 20) & 0x3FF, 10);
//int i4 = _2sComplement.toInt((value >> 30) & 0x003, 10);
float norm = (float)Math.Sqrt(i1 * i1 + i2 * i2 + i3 * i3);
vN = new Assimp.Vector3D(Convert.ToSingle(i1) / norm,
Convert.ToSingle(i2) / norm,
Convert.ToSingle(i3) / norm);
//Debug.WriteLine(vN);
break;
default:
throw new Exception("UNIMPLEMENTED NORMAL TYPE. PLEASE REPORT");
}
if (j == 2)
{
amesh.Normals.Add(vN);
}
else if (j == 3)
{
amesh.Tangents.Add(vN);
amesh.BiTangents.Add(new Assimp.Vector3D(0.0f, 0.0f, 1.0f));
}
break;
}
case 4: //bPosition
vbr.ReadBytes(4); // skip
break;
case 5: //BlendIndices + BlendWeights
{
int[] joint_ids = new int[4];
float[] weights = new float[4];
for (int k = 0; k < 4; k++)
{
joint_ids[k] = vbr.ReadByte();
}
for (int k = 0; k < 4; k++)
{
weights[k] = Utils.Half.decompress(vbr.ReadUInt16());
}
if (Skinned)
//if (false)
{
for (int k = 0; k < 4; k++)
{
int joint_id = joint_ids[k];
Assimp.VertexWeight vw = new Assimp.VertexWeight();
vw.VertexID = i;
vw.Weight = weights[k];
localJointDict[joint_id].VertexWeights.Add(vw);
}
}
break;
}
case 6:
break; //Handled by 5
default:
{
throw new Exception("UNIMPLEMENTED BUF Info. PLEASE REPORT");
break;
}
}
}
}
//Export Faces
//Get indices
ibr.BaseStream.Seek(0, SeekOrigin.Begin);
bool start = false;
int fstart = 0;
for (int i = 0; i < metaData.batchcount / 3; i++)
{
int f1, f2, f3;
//NEXT models assume that all gstream meshes have uint16 indices
f1 = ibr.ReadUInt16();
f2 = ibr.ReadUInt16();
f3 = ibr.ReadUInt16();
if (!start && this.type != TYPES.COLLISION)
{
fstart = f1; start = true;
}
else if (!start && this.type == TYPES.COLLISION)
{
fstart = 0; start = true;
}
int f11, f22, f33;
f11 = f1 - fstart;
f22 = f2 - fstart;
f33 = f3 - fstart;
Assimp.Face face = new Assimp.Face();
face.Indices.Add(f11);
face.Indices.Add(f22);
face.Indices.Add(f33);
amesh.Faces.Add(face);
}
scn.Meshes.Add(amesh);
}
node = base.assimpExport(ref scn, ref meshImportStatus);
node.MeshIndices.Add(meshImportStatus[meshHash]);
return(node);
}
protected override void ConvertGeometry(IGeometry iGeometry, ref Matrix4x4 nodeWorldTransform)
{
if (iGeometry.Format != GeometryFormat.Basic && iGeometry.Format != GeometryFormat.BasicDX)
{
throw new InvalidOperationException();
}
var geometry = ( Geometry )iGeometry;
var materialIndexMap = new int[Math.Max(1, geometry.Materials.Length)];
if (geometry.HasMaterials)
{
for (var i = 0; i < geometry.Materials.Length; i++)
{
// Convert material
var material = geometry.Materials[i];
if (!mConvertedMaterialCache.TryGetValue(material, out var aiMaterialIndex))
{
var textureName = material.UseTexture ? FormatTextureName(material.TextureId) : null;
var aiMaterial = CreateMaterial(material.Diffuse, material.Specular, Color.Gray, textureName, material.ClampU,
material.ClampV, material.FlipU, material.FlipV, material.UseAlpha);
aiMaterialIndex = Scene.MaterialCount;
Scene.Materials.Add(aiMaterial);
mConvertedMaterialCache[material] = aiMaterialIndex;
}
materialIndexMap[i] = aiMaterialIndex;
}
}
else
{
materialIndexMap[0] = GetNoMaterialMaterialIndex();
}
foreach (var mesh in geometry.Meshes)
{
var aiMesh = new Assimp.Mesh();
// Convert mesh
var hasNormals = geometry.HasNormals || mesh.HasNormals;
var triangleIndices = mesh.ToTriangles();
var vertices = new List <Vertex>();
for (var i = 0; i < triangleIndices.Length; i += 3)
{
var aiFace = new Assimp.Face();
for (int j = 0; j < 3; j++)
{
var index = triangleIndices[i + j];
var vertex = new Vertex {
Position = geometry.VertexPositions[index.VertexIndex]
};
if (hasNormals)
{
vertex.Normal = geometry.HasNormals ? geometry.VertexNormals[index.VertexIndex] : index.Normal;
}
if (mesh.HasColors)
{
vertex.Color = index.Color;
}
if (mesh.HasUVs)
{
vertex.UV = UVCodec.Decode255(index.UV);
}
var vertexIndex = vertices.IndexOf(vertex);
if (vertexIndex == -1)
{
vertexIndex = vertices.Count;
vertices.Add(vertex);
}
aiFace.Indices.Add(vertexIndex);
}
aiMesh.Faces.Add(aiFace);
}
aiMesh.Vertices.AddRange(vertices.Select(x => ToAssimp(x.Position)));
if (hasNormals)
{
aiMesh.Normals.AddRange(vertices.Select(x => ToAssimp(x.Normal)));
}
if (mesh.HasColors)
{
aiMesh.VertexColorChannels[0].AddRange(vertices.Select(x => ToAssimp(x.Color)));
}
if (mesh.HasUVs)
{
aiMesh.TextureCoordinateChannels[0].AddRange(vertices.Select(x => ToAssimp(x.UV)));
}
// Set mesh material index
aiMesh.MaterialIndex = materialIndexMap[Math.Min(mesh.MaterialId, materialIndexMap.Length - 1)];
// Add mesh to scene
Scene.Meshes.Add(aiMesh);
}
}
private void ConvertMeshes(List <Mesh> meshes, VertexPositionBuffer positionBuffer, VertexNormalBuffer normalBuffer, VertexColorBuffer colorBuffer, VertexUVBuffer uvBuffer)
{
var state = new MeshRenderState();
for (var i = 0; i < meshes.Count; i++)
{
var mesh = meshes[i];
if (mesh.Parameters != null && mesh.Parameters.Count > 0)
{
ProcessMeshParameters(mesh.Parameters, ref state);
}
var stateCopy = state;
stateCopy.TextureId = 0;
stateCopy.TileMode = 0;
//stateCopy.IndexFlags = 0;
stateCopy.AmbientColor = new Color();
sUniqueStates.Add(stateCopy);
var aiMesh = new Assimp.Mesh();
var vertexCache = new List <Vertex>();
Debug.Assert(state.IndexFlags.HasFlag(IndexAttributeFlags.HasPosition) ? positionBuffer != null : true);
Debug.Assert(state.IndexFlags.HasFlag(IndexAttributeFlags.HasNormal) ? normalBuffer != null : true);
Debug.Assert(state.IndexFlags.HasFlag(IndexAttributeFlags.HasColor) ? colorBuffer != null : true);
Debug.Assert(state.IndexFlags.HasFlag(IndexAttributeFlags.HasUV) ? uvBuffer != null : true);
// Extract all vertices used by the triangles, and build a new vertex list
// with each vertex attribute clumped together
var aiFace = new Assimp.Face();
foreach (var index in mesh.DisplayLists.SelectMany(x => x.ToTriangles()))
{
var vertex = new Vertex();
if (state.IndexFlags.HasFlag(IndexAttributeFlags.HasPosition))
{
vertex.Position = positionBuffer.Elements[index.PositionIndex];
}
if (state.IndexFlags.HasFlag(IndexAttributeFlags.HasNormal))
{
vertex.Normal = normalBuffer.Elements[index.NormalIndex];
}
if (state.IndexFlags.HasFlag(IndexAttributeFlags.HasColor))
{
vertex.Color = colorBuffer.Elements[index.ColorIndex];
}
if (state.IndexFlags.HasFlag(IndexAttributeFlags.HasUV))
{
vertex.UV = uvBuffer.Elements[index.UVIndex];
}
// Find index of this vertex in the list in case it already exists
var vertexIndex = vertexCache.IndexOf(vertex);
if (vertexIndex == -1)
{
vertexIndex = vertexCache.Count;
vertexCache.Add(vertex);
}
aiFace.Indices.Add(vertexIndex);
if (aiFace.IndexCount == 3)
{
// Done with this face, move on to the next one
aiMesh.Faces.Add(aiFace);
aiFace = new Assimp.Face();
}
}
// Convert vertices
aiMesh.Vertices.AddRange(vertexCache.Select(x => ToAssimp(x.Position)));
if (state.IndexFlags.HasFlag(IndexAttributeFlags.HasNormal))
{
aiMesh.Normals.AddRange(vertexCache.Select(x => ToAssimp(x.Normal)));
}
if (state.IndexFlags.HasFlag(IndexAttributeFlags.HasUV))
{
aiMesh.TextureCoordinateChannels[0].AddRange(vertexCache.Select(x => ToAssimp(UVCodec.Decode1023(x.UV))));
}
if (state.IndexFlags.HasFlag(IndexAttributeFlags.HasColor))
{
aiMesh.VertexColorChannels[0].AddRange(vertexCache.Select(x => ToAssimp(x.Color)));
}
// Convert material
if (!mConvertedMaterialCache.TryGetValue(state, out var aiMaterialIndex))
{
// Not in cache, so create a new one and add it
aiMaterialIndex = Scene.MaterialCount;
Scene.Materials.Add(CreateMaterial(Color.Gray, Color.Gray, Color.Gray, FormatTextureName(state.TextureId), false, false,
state.TileMode.HasFlag(TileMode.MirrorU),
state.TileMode.HasFlag(TileMode.MirrorV),
state.BlendAlphaFlags.HasFlag(BlendAlphaFlags.UseAlpha)));
mConvertedMaterialCache[state] = aiMaterialIndex;
}
aiMesh.MaterialIndex = aiMaterialIndex;
// Add mesh to scene.
Scene.Meshes.Add(aiMesh);
}
}
public static Assimp.Scene ToAssimpScene(RwClumpNode clumpNode)
{
// Scene
var aiScene = new Assimp.Scene();
// RootNode
var rootFrame = clumpNode.FrameList[0];
var aiRootNode = new Assimp.Node("RootNode", null);
aiRootNode.Transform = new Assimp.Matrix4x4(rootFrame.Transform.M11, rootFrame.Transform.M21, rootFrame.Transform.M31, rootFrame.Transform.M41,
rootFrame.Transform.M12, rootFrame.Transform.M22, rootFrame.Transform.M32, rootFrame.Transform.M42,
rootFrame.Transform.M13, rootFrame.Transform.M23, rootFrame.Transform.M33, rootFrame.Transform.M43,
rootFrame.Transform.M14, rootFrame.Transform.M24, rootFrame.Transform.M34, rootFrame.Transform.M44);
aiScene.RootNode = aiRootNode;
for (int i = 1; i < clumpNode.FrameList.Count; i++)
{
var frame = clumpNode.FrameList[i];
var frameName = "_" + frame.HAnimFrameExtensionNode.NameId;
Assimp.Node aiParentNode = null;
if (frame.Parent != null)
{
string parentName = "RootNode";
if (frame.Parent.HasHAnimExtension)
{
parentName = "_" + frame.Parent.HAnimFrameExtensionNode.NameId;
}
aiParentNode = aiRootNode.FindNode(parentName);
}
var aiNode = new Assimp.Node(frameName, aiParentNode);
aiNode.Transform = new Assimp.Matrix4x4(frame.Transform.M11, frame.Transform.M21, frame.Transform.M31, frame.Transform.M41,
frame.Transform.M12, frame.Transform.M22, frame.Transform.M32, frame.Transform.M42,
frame.Transform.M13, frame.Transform.M23, frame.Transform.M33, frame.Transform.M43,
frame.Transform.M14, frame.Transform.M24, frame.Transform.M34, frame.Transform.M44);
aiParentNode.Children.Add(aiNode);
}
// Meshes, Materials
for (int atomicIndex = 0; atomicIndex < clumpNode.Atomics.Count; atomicIndex++)
{
var atomic = clumpNode.Atomics[atomicIndex];
var geometry = clumpNode.GeometryList[atomic.GeometryIndex];
var frame = clumpNode.FrameList[atomic.FrameIndex];
var aiNodeName = $"Atomic{atomicIndex}";
var aiNode = new Assimp.Node(aiNodeName, aiScene.RootNode);
var frameWorldTransform = frame.WorldTransform;
aiNode.Transform = new Assimp.Matrix4x4(frameWorldTransform.M11, frameWorldTransform.M21, frameWorldTransform.M31, frameWorldTransform.M41,
frameWorldTransform.M12, frameWorldTransform.M22, frameWorldTransform.M32, frameWorldTransform.M42,
frameWorldTransform.M13, frameWorldTransform.M23, frameWorldTransform.M33, frameWorldTransform.M43,
frameWorldTransform.M14, frameWorldTransform.M24, frameWorldTransform.M34, frameWorldTransform.M44);
aiScene.RootNode.Children.Add(aiNode);
bool hasVertexWeights = geometry.SkinNode != null;
for (int meshIndex = 0; meshIndex < geometry.MeshListNode.MaterialMeshes.Length; meshIndex++)
{
var mesh = geometry.MeshListNode.MaterialMeshes[meshIndex];
var aiMesh = new Assimp.Mesh($"Atomic{atomicIndex}_Geometry{atomic.GeometryIndex}_Mesh{meshIndex}", Assimp.PrimitiveType.Triangle);
// get triangle list indices
int[] indices;
if (geometry.MeshListNode.PrimitiveType == RwPrimitiveType.TriangleList)
{
indices = mesh.Indices;
}
else
{
indices = MeshUtilities.ToTriangleList(mesh.Indices, false);
}
// Faces
for (int i = 0; i < indices.Length; i += 3)
{
var faceIndices = new[] { i, i + 1, i + 2 };
var aiFace = new Assimp.Face(faceIndices);
aiMesh.Faces.Add(aiFace);
}
// TextureCoordinateChannels, VertexColorChannels, Vertices, MaterialIndex, Normals
for (int triIdx = 0; triIdx < indices.Length; triIdx += 3)
{
for (int triVertIdx = 0; triVertIdx < 3; triVertIdx++)
{
int vertexIndex = indices[triIdx + triVertIdx];
// TextureCoordinateChannels
if (geometry.HasTextureCoordinates)
{
for (int channelIdx = 0; channelIdx < geometry.TextureCoordinateChannelCount; channelIdx++)
{
var textureCoordinate = geometry.TextureCoordinateChannels[channelIdx][vertexIndex];
var aiTextureCoordinate = new Assimp.Vector3D(textureCoordinate.X, textureCoordinate.Y, 0f);
aiMesh.TextureCoordinateChannels[channelIdx].Add(aiTextureCoordinate);
}
}
// VertexColorChannels
if (geometry.HasColors)
{
var color = geometry.Colors[vertexIndex];
var aiColor = new Assimp.Color4D(color.R / 255f, color.G / 255f, color.B / 255f, color.A / 255f);
aiMesh.VertexColorChannels[0].Add(aiColor);
}
// Vertices
if (geometry.HasVertices)
{
var vertex = geometry.Vertices[vertexIndex];
var aiVertex = new Assimp.Vector3D(vertex.X, vertex.Y, vertex.Z);
aiMesh.Vertices.Add(aiVertex);
}
// Normals
if (geometry.HasNormals)
{
var normal = geometry.Normals[vertexIndex];
var aiNormal = new Assimp.Vector3D(normal.X, normal.Y, normal.Z);
aiMesh.Normals.Add(aiNormal);
}
}
}
// Bones
if (hasVertexWeights)
{
var skinNode = geometry.SkinNode;
var aiBoneMap = new Dictionary <int, Assimp.Bone>();
for (int i = 0; i < indices.Length; i++)
{
var vertexIndex = indices[i];
int realVertexIndex = i;
for (int j = 0; j < 4; j++)
{
var boneIndex = skinNode.VertexBoneIndices[vertexIndex][j];
var boneWeight = skinNode.VertexBoneWeights[vertexIndex][j];
if (boneWeight == 0.0f)
{
continue;
}
if (!aiBoneMap.Keys.Contains(boneIndex))
{
var aiBone = new Assimp.Bone();
var boneFrame = clumpNode.FrameList.GetFrameByHierarchyIndex(boneIndex);
aiBone.Name = boneFrame.HasHAnimExtension ? "_" + boneFrame.HAnimFrameExtensionNode.NameId : "RootNode";
aiBone.VertexWeights.Add(new Assimp.VertexWeight(realVertexIndex, boneWeight));
Matrix4x4.Invert(frame.WorldTransform, out Matrix4x4 invertedFrameWorldTransform);
Matrix4x4.Invert(boneFrame.WorldTransform * invertedFrameWorldTransform, out Matrix4x4 offsetMatrix);
aiBone.OffsetMatrix = new Assimp.Matrix4x4(offsetMatrix.M11, offsetMatrix.M21, offsetMatrix.M31, offsetMatrix.M41,
offsetMatrix.M12, offsetMatrix.M22, offsetMatrix.M32, offsetMatrix.M42,
offsetMatrix.M13, offsetMatrix.M23, offsetMatrix.M33, offsetMatrix.M43,
offsetMatrix.M14, offsetMatrix.M24, offsetMatrix.M34, offsetMatrix.M44);
aiBoneMap[boneIndex] = aiBone;
}
if (!aiBoneMap[boneIndex].VertexWeights.Any(x => x.VertexID == realVertexIndex))
{
aiBoneMap[boneIndex].VertexWeights.Add(new Assimp.VertexWeight(realVertexIndex, boneWeight));
}
}
}
aiMesh.Bones.AddRange(aiBoneMap.Values);
}
else
{
var aiBone = new Assimp.Bone();
// Name
aiBone.Name = frame.HasHAnimExtension ? "_" + frame.HAnimFrameExtensionNode.NameId : "RootNode";
// VertexWeights
for (int i = 0; i < aiMesh.Vertices.Count; i++)
{
var aiVertexWeight = new Assimp.VertexWeight(i, 1f);
aiBone.VertexWeights.Add(aiVertexWeight);
}
// OffsetMatrix
/*
* Matrix4x4.Invert( frame.WorldTransform, out Matrix4x4 offsetMatrix );
* aiBone.OffsetMatrix = new Assimp.Matrix4x4( offsetMatrix.M11, offsetMatrix.M21, offsetMatrix.M31, offsetMatrix.M41,
* offsetMatrix.M12, offsetMatrix.M22, offsetMatrix.M32, offsetMatrix.M42,
* offsetMatrix.M13, offsetMatrix.M23, offsetMatrix.M33, offsetMatrix.M43,
* offsetMatrix.M14, offsetMatrix.M24, offsetMatrix.M34, offsetMatrix.M44 );
*/
aiBone.OffsetMatrix = Assimp.Matrix4x4.Identity;
aiMesh.Bones.Add(aiBone);
}
var material = geometry.Materials[mesh.MaterialIndex];
var aiMaterial = new Assimp.Material();
if (material.IsTextured)
{
// TextureDiffuse
var texture = material.TextureReferenceNode;
aiMaterial.TextureDiffuse = new Assimp.TextureSlot(
texture.Name + ".png", Assimp.TextureType.Diffuse, 0, Assimp.TextureMapping.FromUV, 0, 0, Assimp.TextureOperation.Add, Assimp.TextureWrapMode.Wrap, Assimp.TextureWrapMode.Wrap, 0);
}
// Name
aiMaterial.Name = material.Name ?? $"Geometry{atomic.GeometryIndex}_Material{mesh.MaterialIndex}";
if (material.IsTextured && material.Name == null)
{
aiMaterial.Name = material.TextureReferenceNode.Name;
}
aiMaterial.ShadingMode = Assimp.ShadingMode.Phong;
// Add mesh to meshes
aiScene.Meshes.Add(aiMesh);
// Add material to materials
aiScene.Materials.Add(aiMaterial);
// MaterialIndex
aiMesh.MaterialIndex = aiScene.Materials.Count - 1;
// Add mesh index to node
aiNode.MeshIndices.Add(aiScene.Meshes.Count - 1);
}
}
return(aiScene);
}
public void ExportCollada(string filepath)
{
var aiScene = AssimpHelper.CreateDefaultScene();
foreach (var geometry in Geometries)
{
for (var meshIndex = 0; meshIndex < geometry.Meshes.Count; meshIndex++)
{
var aiMeshNode = new Assimp.Node(geometry.Meshes.Count > 1 ? $"{geometry.Name}_mesh_{meshIndex}" : geometry.Name,
aiScene.RootNode);
aiScene.RootNode.Children.Add(aiMeshNode);
var mesh = geometry.Meshes[meshIndex];
var aiMesh = new Assimp.Mesh();
var aiMaterial = new Assimp.Material
{
Name = mesh.Material.Name,
//ColorDiffuse = AssimpHelper.ToAssimp( mesh.Material.Diffuse ),
//ColorSpecular = AssimpHelper.ToAssimp( mesh.Material.Specular ),
//ColorAmbient = AssimpHelper.ToAssimp( mesh.Material.Ambient ),
Shininess = 0,
ShininessStrength = 0,
Reflectivity = 0,
TextureDiffuse = new Assimp.TextureSlot
{
TextureType = Assimp.TextureType.Diffuse,
FilePath = mesh.Material.TextureName,
WrapModeU = Assimp.TextureWrapMode.Wrap,
WrapModeV = Assimp.TextureWrapMode.Wrap,
}
};
aiMesh.MaterialIndex = aiScene.MaterialCount;
aiScene.Materials.Add(aiMaterial);
foreach (var vertex in mesh.Vertices)
{
aiMesh.Vertices.Add(AssimpHelper.ToAssimp(vertex.Position));
aiMesh.Normals.Add(AssimpHelper.ToAssimp(vertex.Normal));
aiMesh.VertexColorChannels[0].Add(AssimpHelper.ToAssimp(vertex.Color));
aiMesh.TextureCoordinateChannels[0].Add(AssimpHelper.ToAssimp(vertex.UV));
}
for (int i = 0; i < mesh.Indices.Length; i += 3)
{
var aiFace = new Assimp.Face();
for (int j = 0; j < 3; j++)
{
aiFace.Indices.Add(mesh.Indices[i + j]);
}
aiMesh.Faces.Add(aiFace);
}
aiMeshNode.MeshIndices.Add(aiScene.MeshCount);
aiScene.Meshes.Add(aiMesh);
}
}
AssimpHelper.ExportCollada(aiScene, filepath);
}
