internal static Mesh FromAssimp(Assimp.Mesh mesh)
{
Mesh newMesh = new Mesh();
newMesh.Indices = mesh.GetUnsignedIndices();
bool hasTexCoords = mesh.HasTextureCoords(0);
List <Assimp.Vector3D> uvs = hasTexCoords ? mesh.TextureCoordinateChannels[0] : null;
// bounding box values
float min_x, max_x, min_y, max_y, min_z, max_z;
min_x = max_x = mesh.Vertices[0].X;
min_y = max_y = mesh.Vertices[0].Y;
min_z = max_z = mesh.Vertices[0].Z;
Vertex[] vertices = new Vertex[mesh.VertexCount];
for (int i = 0; i < vertices.Length; i++)
{
Vector3 vec = mesh.Vertices[i].ToNumeric();
Vector3 norm = mesh.Normals[i].ToNumeric();
if (hasTexCoords)
{
Assimp.Vector3D uv = uvs[i];
vertices[i] = new Vertex(vec, new Vector2(uv.X, 1.0f - uv.Y), norm);
}
else
{
vertices[i] = new Vertex(vec, Vector2.Zero, norm);
}
if (vec.X < min_x)
{
min_x = vec.X;
}
if (vec.X > max_x)
{
max_x = vec.X;
}
if (vec.Y < min_y)
{
min_y = vec.Y;
}
if (vec.Y > max_y)
{
max_y = vec.Y;
}
if (vec.Z < min_z)
{
min_z = vec.Z;
}
if (vec.Z > max_z)
{
max_z = vec.Z;
}
}
newMesh.BoundingBox = new BoundingBox(new Vector3(min_x, min_y, min_z), new Vector3(max_x, max_y, max_z));
newMesh.Vertices = vertices;
return(newMesh);
}
