Cant see imported mesh

[br4tp1t]

Hi,

 

im trying to show imported mesh but nothing appears, my code looks like this:

canvas = document.getElementById("3dcanvas");    engine = new BABYLON.Engine(canvas, true);    var createScene = function () {        var scene = new BABYLON.Scene(engine);        scene.clearColor = new BABYLON.Color3(0, 0, 0);        var camera = new BABYLON.FreeCamera("camera1", new BABYLON.Vector3(0, 5, -10), scene);        camera.setTarget(BABYLON.Vector3.Zero());        camera.attachControl(canvas, false);        var light = new BABYLON.HemisphericLight("light1", new BABYLON.Vector3(0, 1, 0), scene);        light.intensity = .5;        //var sphere = BABYLON.Mesh.CreateSphere("sphere1", 16, 2, scene);        //sphere.position.y = 1;        var ground = BABYLON.Mesh.CreateGround("ground1", 6, 6, 2, scene);        BABYLON.SceneLoader.ImportMesh("rack_hp", "./", "rack_hp.babylon", scene, function (newMeshes) {            alert(newMeshes[0].id);            newMeshes[0].position = new BABYLON.Vector3(0,0,0);            camera.target = newMeshes[0];        });        return scene;    };    var scene = createScene();    engine.runRenderLoop(function () {        scene.render();    });

i can see that mine http server sended the rack_hp.babylon file, also the alert with "newMeshes[0].id" is showing, i was trying also to change position of this mesh and change camera.target but nothing helped

 

here are mine files(im sending also obj file that ive converted with blender to babylon):

 

https://www.dropbox.com/s/gkgh1m7o1jnmbsq/rack_hp.mtl?dl=0

https://www.dropbox.com/s/wsgq88rxmejg75w/rack_hp.obj?dl=0

https://www.dropbox.com/s/llhw5zahezuu9rm/rack_intrapp.babylon?dl=0

 

Regards,

Piotr

[RaananW]

Hey, can you show us a demo of this scene somewhere? Will be easier to debug.

[br4tp1t]

Hey, you mean how this mesh looks like in blender or what do you mean by demo of this scene?

[RaananW]

this javascript code running somewhere online. Will help us help you :-)

[br4tp1t]

http://bcagroup.pl/babylon/

[gryff]

Hi Piotr, welcome to the babylon forum

 

I think your problem lies with the object you are exporting.

 

The object is huge and even though the origin of the object is at (0,0,0) (yellow dot, A in image below) the closest faces are a long way from that origin point (see B and C in image below).

 

If you are making the camera look at the origin - probably does not see the actual mesh.

 

cheers, gryff

 

 

[RaananW]

Hey, a quick look at your object - it is not centered at 0,0,0 , so setting its position at 0,0,0 is not going to work :-)

 

Try doing that (after loading the mesh):

newMeshes[0].position = newMeshes[0].getBoundingInfo().boundingBox.center.clone().negate()

and back away a bit, you will see the object.

[RaananW]

And gryff explained how to fix it :-) perfect

[gryff]

And gryff explained how to fix it

 

Well not really RaananW - just the problem ;-)

 

One fix Piotr is :

 

1. In Object Mode in Blender, select the object, then go Object->Transform->Geometry To Origin.

2. Now re-export the mesh

3. Because the object is so large,  and your camera settings are:

var camera = new BABYLON.FreeCamera("camera1", new BABYLON.Vector3(0, 5, -10), scene);

it means you are likely to be inside the object

 

To fix this, will have to:

 

1. Scale down the object or

2. Move the camera so that its Z position is is perhaps ~ -150 to -200 units

3. And possibly set the maxZ value of the camera to perhaps 500

 

cheers, gryff

[br4tp1t]

ok i can see mine mesh, but dont have any idea how to move it corectly to center view, or how to export it corectly, because im not familiar with bledner etc

[RaananW]

And NOW gryff explained how to fix it :-) 

[br4tp1t]

ok really thanks for help, ive exported once again the mesh but now ive scaled it down in blender and moved to center position it works like a charm Thanks guys

 

 

but now ive got second question, what is the best way to clone mine mesh because i need to make like 200 of them in one scene, and all of them need its own unique id so i can identify them, is there a way to save custom variables to mesh? so when i click them ill get mine variable/variables?

[gryff]

but dont have any idea how to move it corectly to center view

 

As I said above Piotr, "In Object Mode in Blender, select the object, then go Object->Transform->Geometry To Origin."

 

You can select an object by right clicking on it.

 

Then see image below for the "Object->Transform->Geometry To Origin." part.

 

cheers, gryff

[gryff]

best way to clone mine mesh because i need to make like 200 of them in one scene

 

Piotr, I'm not sure using mesh.clone() will be the way to go as your mesh has 42,000+ tris. And that would leave you with 8 million+ tris in your scene. This might be an alternative:

 

Instances

 

However, with "Instances" you can only vary certain properties of the meshes (see the link)

 

cheers, gryff

[br4tp1t]

instances are perfect cheers again