saving and loading meshes

[vahith]

hi all,
i can achieve the scene saving and loading, but what i expecting is i want to save the single mesh and its child instead of saving all the scene.then i want to load the saved mesh. how i can achieve this.kindly suggest me some eg and method to achieve



thanks
vahi

[JohnK]

Cannot help you with saving individual meshes but can with loading them.

 

BABYLON.SceneLoader.ImportMesh(....) will load a list of individual meshes.

 

Had problem with this but RanaanW sorted it out.

 

See this topic.

[RaananW]

Hi vahith,

 

 

The SceneSerializer doesn't have this functionality. Adding it should not be a problem - but! we are in a code freeze for version 2.1. So, no new features :-)

What you can do however is use the scene serializer, then iterate through all of the meshes and remove the ones you don't need.

If you are looking for a way to load a single mesh, JohnK gave you the best answer - ImportMesh of the scne loader will load a single mesh from an entire babylon file.

I will keep that as a feature for 2.2. Maybe more people are interested in such a functionality.

[JohnK]

@RaananW true to your word I see you have added SerializeMesh to 2.2. Unfortunately I am having problems getting it to work.

 

Using testsave.html I used console.log() to output and copy the JSON string and copied it to testbox.babylon. The using testload.html I tried using ImportMesh to load the mesh and just got a blankscreen.

 

When I modified testsave.html by changing

var serializedMesh = BABYLON.SceneSerializer.SerializeMesh(box);

to saving the whole scene

var serializedMesh = BABYLON.SceneSerializer.Serialize(scene);

and copied the resulting JSON string into testboxscene.babylon and then used testload.html (changing the filename) I obtained the correct mesh.

 

 

Any help would be much appreciated.

 

Over the last few weeks I have been plodding on with my project and have just got to the part when I want to save and open particular meshes so the SerializeMesh function is just what I want, well nearly - but one thing at a time.

[RaananW]

Hi John,

 

I will look into that! Should be working, but hey, we are programmers and we like saying "should be working"...

[RaananW]

Hmmm.... Ok, Problem found.I just pushed a fix, it will soon be updated in the playground and in the main JS file.

Silly thing - if you want a very quick fix, just add

multiMaterials: []

to the scene file. Or check this pull request https://github.com/Cubees/Cubees.github.io/pull/1 :-)

[JohnK]

@Ranaan thank you for that - now the cheeky bit. I am creating "models" which are combinations of one or more meshes. So for me it would be very useful if SerializeMesh could take as its first parameter not only a single mesh but also an array of meshes in the same way that ImportMesh can take a single mesh name or an array of mesh names.

 

Would that be too much of a problem?

[RaananW]

Shouldn't be a problem.

I'll look into that and update here.

[JCPalmer]

Raanan,

I have edits to FileLoader for: Mesh.FreezeWorldMatrix(), Material.checkReadyOnlyOnce, & Camera.setCameraRigMode().  Also AbstractMesh for _waitingFreezeWorldMatrix.

 

Just updated for your MultiMaterials check.  Are you planning to update these in the next day or so?  If so, I probably should PR what I have so far, even without testing yet.  These are new .babylon fields & it is early in alpha, so errors unlikely to impact others.

 

Jeff

[RaananW]

I already pushed the changes, I'm not sure when dk will update the playground. The only thing that I changed was one line of code in the import mesh function on the loader.

[JCPalmer]

Yes, I got that, just was not sure if the 'update' below included those files.

 

Shouldn't be a problem.
I'll look into that and update here.

[RaananW]

Ah, sorry :-)

Well, I haven't checked yet. I will wait for your update before I start.

If you commit your changes to a branch in your repo, I can make sure we are not conflicting before committing.

[RaananW]

Hey Jeff, is the last PR the one you referred to? Or are there other changes to expect? Give me a heads up here when I can make the changes.

[JCPalmer]

Yep, that was it

[JohnK]

@RaananW

 

I might be a bit slow but I get there in the end. I have worked out how to use SerializeMesh to save an array of meshes.

       var serializedMesh;       var meshes_to_save = {                        "materials": [],                        "geometries":    {    "boxes":[],                                            "spheres":[],                                            "cylinders":[],                                            "toruses":[],                                            "grounds":[],                                            "planes":[],                                            "torusKnots":[],                                            "vertexData":[]                        },                        "meshes": []            };        for(var i = 0; i<meshesArray.length; i++) {            serializedMesh = BABYLON.SceneSerializer.SerializeMesh(meshesArray[i]);                       meshes_to_save["materials"].push(serializedMesh["materials"][0]);            meshes_to_save["geometries"]["vertexData"].push(serializedMesh["geometries"]["vertexData"][0]);            meshes_to_save["meshes"].push(serializedMesh["meshes"][0]);        }        var strMesh = JSON.stringify(meshes_to_save);

[RaananW]

Hi John,

 

I have already implemented a solution, but I am not happy with the result, mainly due to one (silly!) little thing - the name of the function, SerializeMesh hints (clearly :-) ) that it serializes a single mesh. So a new functions should be implemented, SerialzeMeshes. but this is just semantics!... The ImportMesh does exactly the same thing - it can load a few meshes or just one single mesh. It is still called ImportMesh and not ImportMeshes... 

In my new implementation the serialize mesh function accepts either a mesh or an array of meshes. I just need to mentally accept it :-)

I will soon push my changes, I guess later on today.

[JohnK]

@Raanan well done and thank you again. I've accepted that ImportMesh can import multiple meshes and that's been around a while so think SerializeMesh is fully compatible.

[RaananW]

Hi John, I just pushed a new version of the SerializeMesh function, extending its functionality. It no accepts either an array of meshes or a single mesh. There is also a flag - withParents (boolean) to add the meshes' parents to the serialization party.

Wait a bit until it is integrated into the main js file and play with it, let me know if its working as you wanted.

[JohnK]

SerializeMesh( meshes_array)  works just as I needed thank you very much. Will be trying out the setting parents option in the next few days when I get to that bit in my project.

 

Thank you again.

Cannot set your previous post as the answer as I did not start the thread.

[masterdon]

Hi everyone, so whats the syntax for serializing all the meshes for saving and then loading them again in scene?

[RaananW]

I assume you are looking for the scene serializer? http://doc.babylonjs.com/classes/3.0/sceneserializer#static-serialize-scene-rarr-any