private static uint CountNodes(aiNode node)
{
uint result = 1;
using (aiNodeArray children = node.Children)
{
uint children_size = children.Size();
for (uint i = 0; i < children_size; i++)
{
using (aiNode child = children.Get(i))
{
result += CountNodes(child);
}
}
}
return(result);
}
internal static global::System.Runtime.InteropServices.HandleRef getCPtr(aiNodeArray obj)
{
return((obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtr);
}
public aiNode ToAssimp(Module.Export.Assimp.Context context, Scene scene, aiNode parent)
{
uint index = 0;
aiNode node_object = new aiNode(name);
// Set parent
node_object.mParent = parent;
// Set transform
using (aiVector3D assimp_scale = Assimp.Convert.UnityToAssimp.Vector3(scale))
{
using (aiQuaternion assimp_rotation = Assimp.Convert.UnityToAssimp.Quaternion(rotation))
{
using (aiVector3D assimp_position = Assimp.Convert.UnityToAssimp.Vector3(position))
{
using (aiMatrix4x4 matrix = new aiMatrix4x4(assimp_scale, assimp_rotation, assimp_position))
{
node_object.mTransformation = matrix.Unmanaged();
}
}
}
}
// Parse the children nodes
if (children != null && children.Length > 0)
{
using (aiNodeArray assimp_children = node_object.Children)
{
assimp_children.Reserve((uint)children.Length, true);
index = 0;
foreach (Node child in children)
{
using (aiNode assimp_child = child.ToAssimp(context, scene, node_object))
{
if (assimp_child != null)
{
assimp_children.Set(index++, assimp_child.Unmanaged());
}
}
}
}
}
// Parse the mesh objects
if (meshes != null && meshes.Length > 0)
{
using (aiUIntArray assimp_meshes = node_object.Meshes)
{
assimp_meshes.Reserve((uint)meshes.Length, true);
index = 0;
foreach (GraphicMesh graphic_mesh in meshes)
{
Mesh mesh = scene.meshes[graphic_mesh.meshIndex];
int nb_materials = (graphic_mesh.materialsIndexes != null ? graphic_mesh.materialsIndexes.Length : 0);
// Handle unity submeshes by creating new meshes for each submesh
for (int i = 0; i < mesh.SubMeshesCount; i++)
{
// Assimp meshes can only have one material. Therefore, mutliple instances of one mesh
// using different materials must be detected and replaced by different output meshes.
uint assimp_mesh_index;
int mat_index = (i < nb_materials ? graphic_mesh.materialsIndexes[i] : 0 /*Assimp default*/);
Module.Export.Assimp.Mesh key = new Module.Export.Assimp.Mesh(graphic_mesh.meshIndex, i, mat_index);
if (!context.meshes.TryGetValue(key, out assimp_mesh_index))
{
assimp_mesh_index = (uint)context.meshes.Count;
context.meshes.Add(key, assimp_mesh_index);
}
assimp_meshes.Set(index++, assimp_mesh_index);
}
}
}
}
// Parse the node metadata
if (components != null)
{
foreach (UnityComponent component in components)
{
aiMetadata assimp_meta = component.ToAssimpMetadata();
if (assimp_meta != null)
{
node_object.mMetaData = assimp_meta.Unmanaged();
break;
}
}
}
context.progress.Update(ASSIMP_PROGRESS_FACTOR);
return(node_object);
}
public static Node FromAssimp(Module.Import.Assimp.Context context, aiScene scene, aiNode assimp_node)
{
// Create new node object
Node node = new Node();
// Get node ID
node.id = context.id++;
// Get node name
node.name = Assimp.Convert.Name(assimp_node.mName, "node");
// Get node metadata
using (aiMetadata meta = assimp_node.mMetaData)
{
UnityComponent metadata = UnityComponent.FromAssimpMetadata(meta);
if (metadata != null)
{
node.components = new UnityComponent[] { metadata };
}
}
// Parse children recursively
using (aiNodeArray children = assimp_node.Children)
{
uint children_size = children.Size();
if (children_size > 0)
{
node.children = new Node[children_size];
for (uint i = 0; i < children_size; i++)
{
aiNode child = children.Get(i);
// ParseNode must dispose of the given node afterward
// We must use a proxy method for saving the result into the array because the index i is captured by the lambda otherwise and it's value is indefinite across multiple threads.
context.threads.ExecAndSaveToArray(node.children, (int)i, () => FromAssimp(context, scene, child));
}
}
}
// Parse meshes associated to this node
using (aiUIntArray meshes = assimp_node.Meshes)
{
uint meshes_size = meshes.Size();
if (meshes_size > 0)
{
int global_meshes_size = (int)scene.Meshes.Size();
node.meshes = new GraphicMesh[meshes_size];
for (uint j = 0; j < meshes_size; j++)
{
node.meshes[j] = new GraphicMesh();
if (j < global_meshes_size)
{
uint mesh_index = meshes.Get(j);
node.meshes[j].meshIndex = (int)mesh_index;
}
}
}
}
// Get the transform of this node
using (aiVector3D position = new aiVector3D())
{
using (aiVector3D scaling = new aiVector3D())
{
using (aiQuaternion rotation = new aiQuaternion())
{
assimp_node.mTransformation.Decompose(scaling, rotation, position);
node.position = Assimp.Convert.AssimpToUnity.Vector3(position);
node.rotation = Assimp.Convert.AssimpToUnity.Quaternion(rotation);
node.scale = Assimp.Convert.AssimpToUnity.Vector3(scaling);
}
}
}
// We must dispose of the given parameter to avoid memory leaks
assimp_node.Dispose();
context.progress.Update(ASSIMP_PROGRESS_FACTOR);
return(node);
}
