ios - Scene Kit: projectPoint calculated is displaced -

-

i trying draw frame on sphere on parent view of scene, reason points converted scnscene.projectpoint method displaced.

to make simple, created sphere @ center of scene 2 radius. sphere attached root node, top left corner on world coordinates @ (-2,-2,0) point.

here complete code:

func spherewithframe(){      var v1 = scnvector3(x: 0,y: 0,z: 0)     var v2 = scnvector3(x: 0,y: 0,z: 0)      let topsphere = scnsphere(radius: 2.0)     topsphere.firstmaterial!.diffuse.contents = uicolor.greencolor()       let topspherenode = scnnode(geometry: topsphere)     topspherenode.position = scnvector3make(0, 0, 0)     scene.rootnode.addchildnode(topspherenode)      topspherenode.getboundingboxmin(&v1, max: &v2)      //world coordinates     let v1w =  topspherenode.convertposition(v1, tonode: scene.rootnode)     let v2w =  topspherenode.convertposition(v2, tonode: scene.rootnode)      //projected coordinates     let v1p = scnview.projectpoint(v1w)     let v2p = scnview.projectpoint(v2w)      //frame rectangle     var rect = cgrectmake(cgfloat(v1p.x), cgfloat(v2p.y), cgfloat(v2p.x - v1p.x), cgfloat(v1p.y - v2p.y))     let rectview = uiview(frame: rect)     rectview.alpha = 0.3     rectview.backgroundcolor = uicolor.bluecolor()     scnview.addsubview(rectview)      println("v1 \(v1.tostring()), v2\(v2.tostring())")     println("v1w \(v1w.tostring()), v2w\(v2w.tostring())")     println("v1p \(v1p.tostring()), v2w\(v2p.tostring())")     println("rect\(rect)")  }

the console:

v1 x:-2.0,y:-2.0,z:-2.0, v2x:2.0,y:2.0,z:2.0 v1w x:-2.0,y:-2.0,z:-2.0, v2wx:2.0,y:2.0,z:2.0 v1p x:90.718,y:309.282,z:0.925926, v2wx:263.923,y:136.077,z:0.883838 rect(90.718, 136.077, 173.205, 173.205)

the result on screen rectangle little right should be. the result on screen

i try follow post " how find mouse point in scene using scenekit?". getting wrong?

have set z 0 on both world coordinates:

v1w.z = 0 v2w.z = 0

explaining things help


Comments

Post a Comment

Popular posts from this blog

javascript - oscilloscope of speaker input stops rendering after a few seconds -

-
the following script reads audio user's microphone , renders oscilloscope on html canvas. the source taken example of mozilla developer network: visualizations web audio api and here fiddle: http://jsfiddle.net/b7j8pktp/ mozgetusermedia (note: code has no fork mechanism different browsers: works firefox) it works fine few seconds , stops rendering. whereas works totally stable: http://mdn.github.io/voice-change-o-matic/ the problem can reduced following code. microphone activation icon (next the address bar in firefox) disappears after 5 seconds: navigator.mozgetusermedia({audio: true}, function() {}, function() {} ); ( http://jsfiddle.net/b7j8pktp/2/ ) this known bug in firefox. take stream getusermedia call , hook window so: navigator.mozgetusermedia({audio: true}, function(stream) { window.stream = stream; // rest of code }, function err() { // handle error }); hopefully can fixed soon. problem we're f
Read more

javascript - gulp-nodemon - nodejs restart after file change - Error: listen EADDRINUSE events.js:85 -

-
i'm running nodejs 0.12.3 - gulp 3.10.8 , gulp-nodemon 2.0.3. gulpfile.js : gulp.task('serve', ['build'], function() { gulp.start('fb-flo'); nodemon({ script: paths.server, env: { 'node_env': 'development' }, // env: { 'node_env': 'production' }, execmap: { 'js': 'node_modules/babel/bin/babel-node --stage 1' //es7 cote server }, delay: '0ms', watch: ['src/shared/', 'src/server/'], ignore: ['src/shared/components'], tasks: function (changedfiles) { var tasks = []; changedfiles.foreach(function (file) { if (path.extname(file) === '.jsx' && !~tasks.indexof('bundlejs')) tasks.push('bundlejs'); if (path.extname(file) === '.less' && !~tasks.indexof('compileless')) tasks.push('compileless'); }); return tasks; }
Read more

Fatal Python error: Py_Initialize: unable to load the file system codec. ImportError: No module named 'encodings' -

-
i trying make simple python program opening list of webpages user manually download reports site. don't have previous experience preparing exe files.. , i'm in learning process python coding. of done on windows 7 x64 this python code: #!c:/python34/python.exe -u splinter import * import time import os import csv #---------------------------------- raporty = [] open('../raporty.csv', newline='') csvfile: contents = csv.reader(csvfile, delimiter=' ', quotechar='|') row in contents: r = ', '.join(row) r = r.replace(',','') raporty.append(r) #--not implemented yet zmienne = [] open('../zmienne.csv', newline='') csvfile: contents = csv.reader(csvfile, delimiter=' ', quotechar='|') row in contents: r = ', '.join(row) r = r.replace(',','') zmienne.append(r) print("start") browser = browser(
Read more