javascript - Threejs - How to raycast and get barycentric coordinates of triangle in mesh? -


i'm using r71 , need click raycast scale three.geometry plane according user uploaded photo , barycentric coordinates of point inside clicked triangle on mesh. know there three.triangle.barycoordfrompoint (point, optionaltarget) function don't desired result guess because mesh scaled according image uploaded. 

var scaleratio = 0.1;  var loader = new three.objloader();  loader.load( 'obj/plano_tri.obj', function(object) {      var scaletexture = 1;      scalegeometryx = texture.image.width / texture.image.height ;       var desiredheight = 144 * 0.08;       if (texture.image.height > texture.image.width) {            scaletexture = desiredheight / texture.image.height;       }        var plane = object;        plane.scale.setx( scaleratio * scalegeometryx );        plane.scale.sety( scaleratio );        scene.add( plane );     });

my code attempts transform face3 indexes obtained @ raycast in triangle , call function point raycast:

raycaster.setfromcamera( mouse, camera );  intersects = raycaster.intersectobject( plane, true );  var face = plane.geometry.faces[ intersects[0].faceindex ];  var facex = plane.geometry.vertices[ face.a ];  var facey = plane.geometry.vertices[ face.b ];  var facez = plane.geometry.vertices[ face.c ];  var triangle = new three.triangle ( facex, facey, facez );  var bary = triangle.barycoordfrompoint( raycastlast[0].point ) ;

a console.log( bary ) outputs t…e.vector3 {x: 11.585726082148518, y: 27.99652418990989, z: -38.58225027205841} seems incorrect values big.

how can correct barycentric coordinates intersected point inside triangle of scaled mesh?

thank you

i managed understand how correct values. triangle uvs needed scaled also:

var facex = new three.vector3( plane.geometry.vertices[faceid.a].x  / ( 1/scaleratio ) * scalegeometryx , plane.geometry.vertices[faceid.a].y  / (1/scaleratio ) , 0    );  var facey = new three.vector3( plane.geometry.vertices[faceid.b].x  / ( 1/scaleratio ) * scalegeometryx , plane.geometry.vertices[faceid.b].y  / (1/scaleratio ) , 0    );  var facez = new three.vector3( plane.geometry.vertices[faceid.c].x  / ( 1/scaleratio ) * scalegeometryx , plane.geometry.vertices[faceid.c].y  / (1/scaleratio ) , 0   );  var triangle = new three.triangle( facex , facey , facez );  var bary = trianglebar.barycoordfrompoint (intersects[ 0 ].point);

Comments

Post a Comment

Popular posts from this blog

html - Outlook 2010 Anchor (url/address/link) -

i'm trying link specific pdf page msoutlook'10 or msword'10, #page=... anchor particularly useful , works fine elsewhere. unfortunately when click [ctr-k] in outlook or winword, links re-formatted assuming unc path. pdf file located on shared drive. using "file:" prefix links open pdf in adobe reader (outside of browser), , "http:" open inside browser. issue seem need open in browser "file:" prefix in order anchor work. know anchors work inside browser. outlook uses windows/explorer default program (based on file extension) seems open in adobe reader neglecting anchor. is aware of solution, link specific page or bookmark of shared-pdf ms outlook and/or winword link? common references: mailermailer.com/...anchor-tags-html-emails campaignmonitor.com/...anchor-links-in-email-newsletters/ stackoverflow.com/...anchor-in-pdf-document
Read more

javascript - Why does running this loop 9 times take 100x longer than running it 8 times? -

consider code: test = function() { } t = new test(); (var = 0; < 8; i++) { result = t instanceof test; } if change number of iterations 8 9 , loop take 100 times longer complete in latest version of firefox (41.0.1). tested on 2 different pcs , magic limit 8. here jsperf test used: http://jsperf.com/instanceof-8-times-vs-9-times does have idea why might happen? seems specific instanceof . not happen if else object, example check property. note: filed bugzilla bug this. jan de mooij mozilla team has posted details in bugzilla thread . here's simplistic interpretation of highly technical answers: in i < 8 case, firefox smart enough hoist result = t instanceof test; statement out of loop (according tests, doesn't seem omit altogether). in i < 9 case, apparently doesn't optimization . why? reason not clear, related fact 9 iterations threshold above function considered "hot" enough run through jit compiler. i < 8 cas...
Read more

Getting gateway time-out Rails app with Nginx + Puma running on Digital Ocean -

following this guide setup app on digital ocean droplet, not working. site not loading , it's throwing: "gateway time-out". the puma server works, since ps aux | grep puma prints: root 15878 0.0 0.4 376832 2168 ? sl 12:50 0:00 puma 2.13.4 (unix:///var/www/myapp/shared/tmp/sockets/myapp-puma.sock) [20150930164940] root 15881 0.0 0.7 903676 3692 ? sl 12:50 0:06 puma: cluster worker 0: 15878 [20150930164940] root 24654 0.0 0.1 11748 916 pts/2 s+ 18:00 0:00 grep --color=auto puma my nginx config: user root; worker_processes 1; events { worker_connections 1024; } http { upstream puma { server unix:///var/www/myapp/shared/tmp/sockets/myapp-puma.sock; } server { listen 80; server_name myapp.com; root /var/www/myapp/current/public; access_log /var/www/myapp/current/log/access.log; error_log /...
Read more