work with obj or stl loaded geometry

[tarasprystavskyj]

whant to use that lib with obj or stl or other files loaded through three.js.

now lib shows me error "the geometry is not supported"

How can I do it with this lib?

[tarasprystavskyj]

here is script I whant to make working
http://188.226.157.20/3d/canvas_page_for_obj_model.html
there you can see obj file type

Here is code I need to get working.
` var loader = new THREE.OBJMTLLoader();
loader.load( 'obj/shell_nte3.obj', 'obj/shell_nte3.mtl', function ( object ) {
object.children.forEach (function(child) {
});
var objectBSP = new ThreeBSP( object );
var materialNormal = new THREE.MeshNormalMaterial();

var sphereGeometry = new THREE.SphereGeometry( 60, 32, 32 );
var sphereMesh = new THREE.Mesh( sphereGeometry );
var sphereBSP = new ThreeBSP( sphereMesh );

var newBSP = sphereBSP.intersect( objectBSP ); //objectBSP //cubeBSP
var newMesh = newBSP.toMesh( materialNormal );
newMesh.position.set(-70, 60, -120);
scene.add( newMesh );

            } );`

[tarasprystavskyj]

solved this isue. Can now provide fix to your lib.

object.traverse( function ( child ) {

                        if ( child.geometry !== undefined ) {
                            console.log( "found object.geometry" );
                            geometry = child.geometry;


                        }

                    } );

and then we can make ThreeBSP object of it
objectBSP = new ThreeBSP( geometry );

And whole code will look like this

var loader = new THREE.OBJMTLLoader();
                    loader.load( 'obj/'+filename+'.obj', 'obj/'+filename+'.mtl', function ( object ) {
                    var geometry;
                    var objectBSP;

                    object.traverse( function ( child ) {

                        if ( child.geometry !== undefined ) {
                            console.log( "found object.geometry" );
                            geometry = child.geometry;

                        }

                    } );

                    /*object.children.forEach (function(child) {
                        child.material.specular.setHex (0x595959);
                        child.material.color.setHex (0x959595);
                        child.material.ambient.setHex (0x959595);
                    });*/
                    //object.position.y = 0;
//                  object.position.x = 0;
//                  object.position.z = 0;
                    objects.push( mesh );

    function add_intersect(geometry)
    {
    objectBSP = new ThreeBSP( geometry );                
    var materialNormal = new THREE.MeshNormalMaterial();


    var sphereGeometry = new THREE.SphereGeometry( 15, 15, 15 );
    var sphereMesh = new THREE.Mesh( sphereGeometry );
    var sphereBSP = new ThreeBSP( sphereMesh );

    // Example #4 - Cube intersect Sphere
    //var newBSP = sphereBSP.intersect( objectBSP ); //objectBSP //cubeBSP
    var newMesh = newBSP.toMesh( materialNormal );
    newMesh.position.set(-70, 60, -120);


    //scene.add( sphereMesh  );
    //scene.add( object );
scene.add( newMesh );

    }   

    add_intersect(geometry);

[scotmos]

Does this also work with JSON FIles using THREE.ObjectLoader();?

[tarasprystavskyj]

I suppose yes. Don't remember the details of case now. But as I understand three.js stores all loaded models in object with same semantics.

Besides now I can also say that these lib (threeBSP) is not the slowest way to intersect small file even for production. Compared results with compiled app - openscad.

[msahli2]

Hi
it seems that ThreeCSG does not work with complex geometry loaded with neither ObjectLoader nor PlyLoader !
may I ask you what kind of OBJMTL are loading , and if you have some demo about , because the link above seems to be dead
Thanks

[liangchaob]

Does it support stl file?

[msahli2]

Hi
This Works
var loader = new THREE.OBJLoader();
loader.load('https://anyfile.obj', function(obj) {
obj.traverse( function (child) { if (child instanceof THREE.Mesh) geometry = child.geometry; child.material = Shipmaterial; });

//Geo1 for  CGS  boolean Manipulation   we bave to Convert from BufferGeometry to geometry to allow boolean operations
	var geo = new THREE.Geometry().fromBufferGeometry( geometry );
	Geo1 = new THREE.Mesh( geo,  material1   );		
	Geo1 .rotation.x = -Math.PI/2 ; Geo1 .position.set(-x,0,0);  Geo1.renderOrder = 5;
            Geo1.updateMatrixWorld(true);

           //--------------boolean operations here--------------------
    }

[liangchaob]

Hi
This Works
var loader = new THREE.OBJLoader();
loader.load('https://anyfile.obj', function(obj) {
obj.traverse( function (child) { if (child instanceof THREE.Mesh) geometry = child.geometry; child.material = Shipmaterial; });

//Geo1 for  CGS  boolean Manipulation   we bave to Convert from BufferGeometry to geometry to allow boolean operations
	var geo = new THREE.Geometry().fromBufferGeometry( geometry );
	Geo1 = new THREE.Mesh( geo,  material1   );		
	Geo1 .rotation.x = -Math.PI/2 ; Geo1 .position.set(-x,0,0);  Geo1.renderOrder = 5;
            Geo1.updateMatrixWorld(true);

           //--------------boolean operations here--------------------
    }

Thanks, it Works for the simple geometry!
But my Chrome stuck when obj faces too much, how to solve

[msahli2]

This may work (I hope so) 1. download Meshlab (it's free) 2. open anyfile.obj 3. try to simplify the mesh 4. save to anyfile2.obj 5. Run the procedure with the later file Le mer. 27 janv. 2021 à 01:58, liangchao <[email protected]> a écrit :

…

Hi This Works var loader = new THREE.OBJLoader(); loader.load('https://anyfile.obj', function(obj) { obj.traverse( function (child) { if (child instanceof THREE.Mesh) geometry = child.geometry; child.material = Shipmaterial; }); //Geo1 for CGS boolean Manipulation we bave to Convert from BufferGeometry to geometry to allow boolean operations var geo = new THREE.Geometry().fromBufferGeometry( geometry ); Geo1 = new THREE.Mesh( geo, material1 ); Geo1 .rotation.x = -Math.PI/2 ; Geo1 .position.set(-x,0,0); Geo1.renderOrder = 5; Geo1.updateMatrixWorld(true); //--------------boolean operations here-------------------- } Thanks, it Works for the simple geometry! But my Chrome stuck when obj faces too much, how to solve <https://camo.githubusercontent.com/c5ecf5e6cae9c7fdb2e4b5028a82b22a35de2f330ea17173192c45b3afdc1a6c/687474703a2f2f697069632e6c69616e676368616f2e736974652f696d6167652e706e67> — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#25 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACW6XDNLQOITPN6ZVG2GPXDS35QKTANCNFSM4B46L7OA> .