private static Mesh FromAssimp(Module.Import.Assimp.Context context, aiMesh mesh_data)
{
// Create new mesh
Mesh mesh = new Mesh();
// Assimp does not support submeshes
mesh.submeshes = new SubMesh[1];
mesh.submeshes[0] = new SubMesh();
// Get material associated to this mesh
mesh.assimpMaterial = (int)mesh_data.mMaterialIndex;
// Get mesh name
using (aiString mesh_name = mesh_data.mName)
{
mesh.name = Assimp.Convert.Name(mesh_name, "mesh");
}
// Get vertices
if (mesh_data.HasPositions())
{
using (aiVector3DArray vertices = mesh_data.Vertices)
{
mesh.vertices = Assimp.Convert.AssimpToUnity.Array <aiVector3D, Vector3>(Assimp.Convert.AssimpToUnity.Vector3, vertices);
}
}
// Get normals
if (mesh_data.HasNormals())
{
using (aiVector3DArray normals = mesh_data.Normals)
{
mesh.normals = Assimp.Convert.AssimpToUnity.Array <aiVector3D, Vector3>(Assimp.Convert.AssimpToUnity.Vector3, normals);
}
}
// Get tangents
if (mesh_data.HasTangentsAndBitangents())
{
using (aiVector3DArray tangents = mesh_data.Tangents)
{
mesh.tangents = Assimp.Convert.AssimpToUnity.Array <aiVector3D, Vector4>(Assimp.Convert.AssimpToUnity.Tangent, tangents);
}
}
// Get faces
if (mesh_data.HasFaces())
{
using (aiFaceArray faces = mesh_data.Faces)
{
mesh.submeshes[0].triangles = Assimp.Convert.AssimpToUnity.Face(faces, out mesh.submeshes[0].topology);
}
}
// Get UV coords
if (mesh_data.GetNumUVChannels() > 0 && mesh_data.HasTextureCoords(0))
{
using (aiVector3DMultiArray texture_coords = mesh_data.TextureCoords)
{
using (aiVector3DArray texture_coords0 = texture_coords.Get(0))
{
mesh.uv1 = Assimp.Convert.AssimpToUnity.Array <aiVector3D, Vector2>(Assimp.Convert.AssimpToUnity.UV, texture_coords0);
}
if (mesh_data.GetNumUVChannels() > 1 && mesh_data.HasTextureCoords(1))
{
using (aiVector3DArray texture_coords1 = texture_coords.Get(1))
{
mesh.uv2 = Assimp.Convert.AssimpToUnity.Array <aiVector3D, Vector2>(Assimp.Convert.AssimpToUnity.UV, texture_coords1);
}
}
}
}
else
{
// No texture UVs. We need to generate some to avoid problems with most default unity shaders
int size = mesh.vertices.Length;
mesh.uv1 = new Vector2[size];
}
// Get vertex colors
if (mesh_data.GetNumColorChannels() > 0 && mesh_data.HasVertexColors(0))
{
using (aiColor4DMultiArray colors = mesh_data.Colors)
{
using (aiColor4DArray colors0 = colors.Get(0))
{
mesh.colors = Assimp.Convert.AssimpToUnity.Array <aiColor4D, Color>(Assimp.Convert.AssimpToUnity.Color, colors0);
}
}
}
// TODO: anims + bones
// We must dispose of the given parameter to free unused memory
mesh_data.Dispose();
context.progress.Update(ASSIMP_PROGRESS_FACTOR);
return(mesh);
}
internal static global::System.Runtime.InteropServices.HandleRef getCPtr(aiVector3DMultiArray obj)
{
return((obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtr);
}
private static void ToAssimp(Module.Export.Assimp.Context context, Scene scene, Module.Export.Assimp.Mesh mesh_indexes, aiMesh assimp_mesh)
{
Mesh mesh = scene.meshes[mesh_indexes.mesh];
assimp_mesh.mMaterialIndex = (uint)mesh_indexes.material;
using (aiString assimp_mesh_name = new aiString(mesh.name))
{
assimp_mesh.mName = assimp_mesh_name.Unmanaged();
}
if (mesh.vertices.Length > 0)
{
using (aiVector3DArray vertices = assimp_mesh.Vertices)
{
Assimp.Convert.UnityToAssimp.Array(Assimp.Convert.UnityToAssimp.Vector3, mesh.vertices, vertices);
}
}
if (mesh.normals.Length > 0)
{
using (aiVector3DArray normals = assimp_mesh.Normals)
{
Assimp.Convert.UnityToAssimp.Array(Assimp.Convert.UnityToAssimp.Vector3, mesh.normals, normals);
}
}
if (mesh.tangents.Length > 0)
{
using (aiVector3DArray tangents = assimp_mesh.Tangents)
{
Assimp.Convert.UnityToAssimp.Array(Assimp.Convert.UnityToAssimp.Tangent, mesh.tangents, tangents);
}
}
if (mesh_indexes.submesh < mesh.submeshes.Length)
{
// Support for submeshes: this mesh represent only one submesh of the original mesh
SubMesh sub_mesh = mesh.submeshes[mesh_indexes.submesh];
if (sub_mesh != null && sub_mesh.triangles != null && sub_mesh.triangles.Length > 0)
{
using (aiFaceArray faces = assimp_mesh.Faces)
{
Assimp.Convert.UnityToAssimp.Face(sub_mesh.triangles, sub_mesh.topology, faces);
}
}
}
if (mesh.uv1.Length > 0 || mesh.uv2.Length > 0)
{
using (aiVector3DMultiArray texture_coords = assimp_mesh.TextureCoords)
{
if (mesh.uv1.Length > 0)
{
using (aiVector3DArray texture_coords0 = texture_coords.Get(0))
{
Assimp.Convert.UnityToAssimp.Array(Assimp.Convert.UnityToAssimp.UV, mesh.uv1, texture_coords0);
}
}
if (mesh.uv2.Length > 0)
{
using (aiVector3DArray texture_coords1 = texture_coords.Get(1))
{
Assimp.Convert.UnityToAssimp.Array(Assimp.Convert.UnityToAssimp.UV, mesh.uv2, texture_coords1);
}
}
}
}
if (mesh.colors.Length > 0)
{
using (aiColor4DMultiArray colors = assimp_mesh.Colors)
{
using (aiColor4DArray colors0 = colors.Get(0))
{
Assimp.Convert.UnityToAssimp.Array(Assimp.Convert.UnityToAssimp.Color, mesh.colors, colors0);
}
}
}
context.progress.Update(ASSIMP_PROGRESS_FACTOR);
}
