public GOWrapperSO Create(GameObject gameObj)
{
fMaterial unityMaterial = gameObj.GetMaterial();
if (unityMaterial == null)
{
AllowMaterialChanges = false;
}
else
{
SOMaterial setMaterial = new UnitySOMaterial(unityMaterial);
AssignSOMaterial(setMaterial);
}
this.parentGO = gameObj;
AppendExistingGO(gameObj);
List <GameObject> children = new List <GameObject>();
UnityUtil.CollectAllChildren(gameObj, children);
for (int i = 0; i < children.Count; ++i)
{
AppendExistingGO(children[i]);
}
return(this);
}
// extracts all MeshFilter objects from input GameObject and appends them, then passes to
// function MakeSOFunc (if null, creates basic MeshSO). Then optionally adds to Scene,
// preserving existing 3D position if desired (default true)
public static SceneObject ImportExistingUnityGO(GameObject go, FScene scene,
bool bAddToScene = true, bool bKeepWorldPosition = true, bool bRecenterFrame = true,
Func <DMesh3, SOMaterial, SceneObject> MakeSOFunc = null)
{
List <MeshFilter> filters = new List <MeshFilter>();
List <GameObject> children = new List <GameObject>()
{
go
};
UnityUtil.CollectAllChildren(go, children);
foreach (var cgo in children)
{
if (cgo.GetComponent <MeshFilter>() != null)
{
filters.Add(cgo.GetComponent <MeshFilter>());
}
}
if (filters.Count == 0)
{
throw new Exception("SceneUtil.ImportExistingUnityGO: no meshes!!");
}
DMesh3 CombineMesh = new DMesh3(MeshComponents.VertexNormals | MeshComponents.VertexColors);
MeshEditor editor = new MeshEditor(CombineMesh);
int gid = 0;
foreach (MeshFilter mesh in filters)
{
fMesh uMesh = new fMesh(mesh.sharedMesh);
using (var imesh = uMesh.CreateCachedIMesh()) {
editor.AppendMesh(imesh, ++gid);
}
}
Vector3f scale = go.GetLocalScale();
AxisAlignedBox3d bounds = CombineMesh.CachedBounds; // bounds.Center is wrt local frame of input go
// ie offset from origin in local coordinates
// if we want to move frame to center of mesh, we have to re-center it at origin
// in local coordinates
if (bRecenterFrame)
{
MeshTransforms.Translate(CombineMesh, -bounds.Center.x, -bounds.Center.y, -bounds.Center.z);
}
SceneObject newSO = (MakeSOFunc != null) ?
MakeSOFunc(CombineMesh, scene.DefaultMeshSOMaterial)
: new DMeshSO().Create(CombineMesh, scene.DefaultMeshSOMaterial);
newSO.Name = go.name;
if (bAddToScene)
{
scene.AddSceneObject(newSO, false);
}
if (bKeepWorldPosition)
{
// compute world rotation/location. If we re-centered the mesh, we need
// to offset by the transform we applied above in local coordinates
// (hence we have to rotate & scale)
if (go.transform.parent != null)
{
throw new Exception("UnitySceneUtil.ImportExistingUnityGO: Not handling case where GO has a parent transform");
}
Frame3f goFrameW = UnityUtil.GetGameObjectFrame(go, CoordSpace.WorldCoords);
Vector3f originW = goFrameW.Origin;
if (bRecenterFrame)
{
originW += goFrameW.Rotation * (scale * (Vector3f)bounds.Center); // offset initial frame to be at center of mesh
}
// convert world frame and offset to scene coordinates
Frame3f goFrameS = scene.ToSceneFrame(goFrameW);
Vector3f boundsCenterS = scene.ToSceneP(originW);
// translate new object to position in scene
Frame3f curF = newSO.GetLocalFrame(CoordSpace.SceneCoords);
curF.Origin += boundsCenterS;
newSO.SetLocalFrame(curF, CoordSpace.SceneCoords);
// apply rotation (around current origin)
curF = newSO.GetLocalFrame(CoordSpace.SceneCoords);
curF.RotateAround(curF.Origin, goFrameS.Rotation);
newSO.SetLocalFrame(curF, CoordSpace.SceneCoords);
// apply local scale
newSO.SetLocalScale(scale);
}
return(newSO);
}
