javascript - Issue with custom geometry and face normal -


i'm quite new threejs , have small issue (probably wrong usage). i'm trying create custom geometry , define faces normals myself.

i create 1 normal in 1 direction , other 1 in opposite direction, mesh not 2 sided expect see 1 of face, can see both of them... idea of i'm doing wrong ?

thanks!

<body>      <script src="../build/three.js"></script>      <script src="js/stats.js"></script>      <script>         var container, stats;          var camera, scene, renderer;               container = document.createelement( 'div' );             document.body.appendchild( container );              scene = new three.scene();              camera = new three.perspectivecamera( 45, window.innerwidth / window.innerheight, 1, 2000 );             camera.up.x = 0;             camera.up.y = 0;             camera.up.z = 1;              camera.position.x = 300;             camera.position.y = -1000;             camera.position.z = 1000;              camera.lookat(new three.vector3(300, 250, 0));             scene.add( camera );              var light, geometry, material;              scene.add( new three.ambientlight( 0x404040 ) );              light = new three.directionallight( 0xffffff );             light.position.set( 0, 1, 0 );             scene.add( light );              material = new three.meshbasicmaterial( { color: 0xffff00, wireframe: false, transparent: false, opacity: 1 } );              geometry = new three.geometry();             geometry.vertices.push(new three.vector3(0,0,0));             geometry.vertices.push(new three.vector3(600,0,0));             geometry.vertices.push(new three.vector3(0,-500,0));             geometry.vertices.push(new three.vector3(600,-500,0));             var face;              face = new three.face3(0,2,1);             face.normal.set(0,0,-1);             geometry.faces.push(face);             face = new three.face3(2,3,1);             face.normal.set(0,0,1);             geometry.faces.push(face);              geometry.computecentroids();             //geometry.computefacenormals();             //geometry.computetangents();              var mesh = new three.mesh(geometry, material);              scene.add(mesh);              renderer = new three.webglrenderer( { antialias: true } );             renderer.setsize( window.innerwidth, window.innerheight );              container.appendchild( renderer.domelement );              renderer.render( scene, camera );       </script>  </body>

webglrenderer uses vertex order in created face defining orientation instead of normal. try doing this:

face = new three.face3(2,1,3);

Comments

Post a Comment

Popular posts from this blog

java - Play! framework 2.0: How to display multiple image? -

i need display gallery of photos. here template: @(photos: list[photo]) @title = { <bold>gallery</bold> } @main(title,"photo"){ <ul class="thumbnails"> @for(photo <- photos) { <li class="span3"> <a href="#" class="thumbnail"> <img src="@photo.path" alt=""> </a> </li> } </ul> } and here controller method: public static result getphotos() { return ok(views.html.photo.gallery.render(photo.get())); } and here photo bean : @entity public class photo extends model { @id public long id; @required public string label; public string path; public photo(string path, string label) { this.path = path; this.label = label; } private static finder<long, photo> find = new finder<long, photo>( long.class, photo.class); public static list<phot...
Read more

gmail - Is there any documentation for read-only access to the Google Contacts API? -

i want read-only access user's google contacts. there stackoverflow member wanted this, , received following answer : yes, there is, use https://www.googleapis.com/auth/contacts.readonly scope , "view contacts". this exchange reference read-only access google contacts can find using google. simply using access token obtained attempt read usual google contacts api (i.e. https://www.google.com/m8/feeds ) fails insufficient permissions. similarly, using google contacts api on new target fails 404 errors (for example https://www.googleapis.com/auth/contacts.readonly/default/full ). is there documentation anywhere on how use api, or permissible way access google contacts api full read-write access?
Read more

php - Controller/JToolBar not working in Joomla 2.5 -

relevant code: jtoolbarhelper::custom('savecategories', 'save', '', 'save', false, false); ... <input type="hidden" name="controller" value="easyblogcontroller"> according can dig docs , own previous questions, should call savecategories() function in easyblogcontroller . i've tried setting value easyblog , easyblog.php (file name) current easyblogcontroller (class name). clicking on save button refreshes page. not redirect, echo or var_dump test code put in savecategories() function. var_dump ing jrequest::getvar('controller') , 'task' return correct values. creating controller object , using $controller->execute('task'); works. the values going depend on location of controller trying call, , have couple options here. typically there controller in base folder of component (likely components/com_easyblog) in file called controller.php , class name inside ...
Read more