animation - Animating UVs in SceneKit -

-

i'm looking way animate sprite sheets in scenekit. after research found core animation way this, perfect need control on animation possible.

i've prepared simple plane mesh, uvs limited 1 spritesheet frame's size. way i'd need animate uvs horizontally. i've found relevant element of material's contentstransform matrix m14 (the 1 responsible horizontal translation).

however, @ runtime, scenekit spits following error:

[scnkit error] geometry?.firstmaterial?.diffuse.contentstransform.m14 not animatable path

this relevant code:

let spritesheetanimation = cabasicanimation(keypath: "geometry?.firstmaterial?.diffuse.contentstransform.m14") spritesheetanimation.fromvalue = 1 - 1 / spritesheetframecount spritesheetanimation.tovalue = 0 spritesheetanimation.byvalue = 1 / spritesheetframecount spritesheetanimation.duration = 1.0 spritesheetanimation.repeatcount = float.infinity  node.geometry?.insertmaterial(material, atindex: 0) node.addanimation(spritesheetanimation, forkey: "spritesheetanimation")

anyone having experience this? don't know if there's easier way this, or if i'm looking @ wrong way or anything. so, pointers appreciated!

two problems here.

  1. coreanimation extends animatable key paths data structures can animate — is, instead of animating between 1 complete catransform3d , another, lets animate key path describes member or attribute of transform (like transform.translation.x).

    scenekit not — can animate complete structure values. is, can animate contentstransform, not contentstransform.something, , need provide complete scnmatrix4 tovalue / fromvalue of animation.

  2. kvc key paths don't have swift optionals, geometry?.firstmaterial?.diffuse.contentstransform not legal key path. lose question marks , should okay.

so, code should (untested):

let spritesheetanimation = cabasicanimation(keypath: "geometry.firstmaterial.diffuse.contentstransform") let translation = scnmatrix4maketranslation(1 - 1 / spritesheetframecount, 0, 0) spritesheetanimation.fromvalue = nsvalue(scnmatrix4: translation) spritesheetanimation.tovalue = nsvalue(scnmatrix4: scnmatrix4identity) spritesheetanimation.duration = 1.0 spritesheetanimation.repeatcount = .infinity

note need wrap scnmatrix4 in nsvalue pass fromvalue , tovalue, because swift can't automatically convert scalar numeric types.

also note can use type inference float.infinity if like.


Comments

Post a Comment

Popular posts from this blog

python - mat is not a numerical tuple : openCV error -

-
i have write down code showing error ma not getting it: please help: showing mat not numerical tuple: import cv import cv2 capture = cv2.videocapture("j.3gp") while(1): _, frame1 = capture.read() grayimage1 = cv2.cvtcolor(frame1, cv2.color_bgr2gray) _, frame2 = capture.read() grayimage2 = cv2.cvtcolor(frame2, cv2.color_bgr2gray) differenceimage = cv2.absdiff(grayimage1,grayimage2) thresholdimage = cv2.threshold(differenceimage,25,255,cv2.thresh_binary) cv2.imshow("difference image", differenceimage) cv2.imshow("threshold image", thresholdimage) cv2.imshow("image", frame1) k = cv2.waitkey(30) & 0xff error arising : ----------------------------------------------------------------------------------------- traceback (most recent call last): file "desk.py", line 15, in <module> cv2.imshow("threshold image", thresholdimage) typeerror: mat not numerical tuple ...
Read more

c# - MSAA finds controls UI Automation doesn't -

-
i'm working on automating windows application. i'm using teststack white framework. i've hit problem. program has 'window' object cannot see inside of. white shows no controls inside of it. inspect.exe shows no controls inside of either when running in ui automation mode. if switch inspect msaa see controls inside fine. there anyway me use msaa c# handle on these controls? if can identify msaa functions need, can use p/invoke call them c#. here's example article doing msaa: http://www.codeproject.com/articles/38906/ui-automation-using-microsoft-active-accessibility also, pinvoke.net can used identify iaccessible (msaa) functions: http://www.pinvoke.net/search.aspx?search=iaccessible&namespace=[all] here's answer along lines: msaa com-based? finally, alternative p/invoke, might able use tlbimp.exe create wrapper assembly oleacc.dll, , access msaa functions through it. i'm not sure if works msaa, it's worth try. as e...
Read more

wordpress - .htaccess: RewriteRule: bad flag delimiters -

-
pulling hair out on one. have following .htaccess file custom redirects in addition wordpress's default settings. when tested on local wamp server worked fine after moving production i'm not getting rewriterule: bad flag delimiters error in server log , after while site goes down internal server error any appreciated. in advance! <ifmodule mod_rewrite.c> rewriteengine on rewritebase / rewriterule ^rockford_weddings___welcome\.html$ /wedding/ [r=301,l] rewriterule ^blog/?$ /journal/ [r=301,l] rewriterule ^blog/(.*)$ /$1 [r=301,l] rewriterule ^portraitinvestment/?$ /portraitinvestment\.pdf [r=301,l] rewriterule ^weddinginvestment/?$ /weddinginvestment\.pdf [r=301,l] rewriterule ^holidaycards2014/?$ /holidaycards2014\.pdf [r=301,l] </ifmodule> # begin wordpress <ifmodule mod_rewrite.c> rewriteengine on rewritebase / rewriterule ^index\.php$ - [l] rewritecond %{request_filename} !-f rewritecond %{request_filename} !-d rewriterule . /index.php [l] </...
Read more