Question

I am trying to create a mesh from an .obj file. I am doing this rather than using the obj loader because I meed to morph the shape using different sliders, select specific faces/vertices and draw a path between vertices.

I am currently getting errors when I try to render the scene and it seems to be something to do with the faces from the obj file. When I manually enter the faces I can create a triangle no problem.

Here is my code

   var camera, scene, renderer,
    geometry, material, mesh;

init();
animate();

function init() {

    var xhr = new XMLHttpRequest();
    xhr.open('GET', '/img/originalMeanModel.obj', false);
    xhr.send(null);
    var text = xhr.responseText;
    var lines = text.split("\n");
    for (i=0; i<19343; i++){
      lines[i] = lines[i].split(" ");
    }

    scene = new THREE.Scene();

    camera = new THREE.PerspectiveCamera( 1, window.innerWidth / window.innerHeight, 1, 2000 );
    camera.position.z = 20;
    scene.add( camera );

    var geometry = new THREE.Geometry()

  /* 
    geometry.vertices.push( new THREE.Vector3( -0.01,  0.01, 0 ) );
    geometry.vertices.push( new THREE.Vector3( -0.01, -0.01, 0 ) );
    geometry.vertices.push( new THREE.Vector3(  0.01, -0.01, 0 ) );
  */
    geometry.faces.push( new THREE.Face3( 0, 1, 2 ) );



    for(i=0; i<6449; i++){
      geometry.vertices.push( 
             new THREE.Vector3( 
              parseFloat(lines[i][1]),   
              parseFloat(lines[i][2]), 
              parseFloat(lines[i][3])) );
    }

    /*
    geometry.faces.push( new THREE.Face3( 0, 1, 2 ) );
    geometry.faces.push( new THREE.Face3( 600, 1, 3000 ) );
    geometry.faces.push( new THREE.Face3( 3000, 6400, 70 ) );
    */


    for(i=6449; i<19343; i++){
      geometry.faces.push( new THREE.Face3( parseInt(lines[i][1]), parseInt(lines[i][2]), parseInt(lines[i][3]) ) );
    }

    console.log(geometry.faces);
    console.log(geometry.vertices);


    material = new THREE.MeshBasicMaterial( { color: 0xff0000, wireframe: false } );
    mesh = new THREE.Mesh( geometry, material );
    scene.add( mesh );

    renderer = new THREE.CanvasRenderer();
    renderer.setSize( window.innerWidth, window.innerHeight );

    document.body.appendChild( renderer.domElement );
}

function animate() {
    // note: three.js includes requestAnimationFrame shim
    requestAnimationFrame( animate );
    render();
}

function render() {
    renderer.render( scene, camera );
}

When I inspect the console the faces and vertices have been printed out as expected. I also have this error printed out 5700+ times

Uncaught TypeError: Cannot read property 'visible' of undefined       Three.js:71
projectScene                                                          Three.js:71
render                                                               Three.js:245
render                                                          threeDemo.php:115
animate                                                         threeDemo.php:106

threeDemo.php:106 is this line of the animate function

render();

threeDemo.php:115 is this line of the render function

renderer.render( scene, camera );

Here is a link the the obj file that I am trying to create a mesh for. https://dl.dropbox.com/u/23384412/originalMeanModel.obj

Is anyone could point me in the right direction it would be really appreciated.

Thanks in advance.

Answer 1

You can use two OBJLoaders for loading each frame geometry. Then create a third Geometry and create the lines using as reference the vertices from the frame geometries.