投稿時間:2022-04-30 11:18:52 RSSフィード2022-04-30 11:00 分まとめ(19件)

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ROBOT	ロボスタ	東京ガスがアクセンチュアのAIソリューションを導入　コールセンターの応答時間が短縮、緊急対応が約14%低減	https://robotstart.info/2022/04/30/accenture-tokyogas.html	東京ガスがアクセンチュアのAIソリューションを導入コールセンターの応答時間が短縮、緊急対応が約低減シェアツイートはてブ超少子高齢社会で労働生産人口が減少している日本では、個々の従業員が持つ知見やノウハウの継承と生産性の向上が多くの企業に共通する課題となっている。	2022-04-30 01:00:52
python	Pythonタグが付けられた新着投稿 - Qiita	【Django】1度のフォーム送信で複数テーブルにデータを保存する方法	https://qiita.com/kim-shun/items/04fdce686c725927d599	django	2022-04-30 10:52:10
python	Pythonタグが付けられた新着投稿 - Qiita	リストからL以上R以下を取り出す	https://qiita.com/shouki/items/5df61b85fb298e632a71	集計	2022-04-30 10:44:20
python	Pythonタグが付けられた新着投稿 - Qiita	PyLadies勉強会（OpenPyXLライブラリ研究） 参加レビュー ～ 4月29日＠飯田橋	https://qiita.com/mikako0115/items/126f62f99165055c7d36	pyladies	2022-04-30 10:15:31
js	JavaScriptタグが付けられた新着投稿 - Qiita	LightsOutゲームのプログラミング	https://qiita.com/Kai_orange4/items/bf5c953ba2e1fe126b59	doctypehtmlgtlthtmlgtlth	2022-04-30 10:43:39
js	JavaScriptタグが付けられた新着投稿 - Qiita	AppletをJSに変換してみる 前編	https://qiita.com/noty2008/items/c90820db35e2f7feabcb	applet	2022-04-30 10:43:02
Linux	Ubuntuタグが付けられた新着投稿 - Qiita	[Ubuntu] Windows 10インストール用USBメモリをUbuntu 21.04上で作成する	https://qiita.com/sengoku/items/9f9a35bbf87ac1061ed5	ubuntu	2022-04-30 10:24:05
Docker	dockerタグが付けられた新着投稿 - Qiita	[Apache Hop] Dockerで動かしてみた	https://qiita.com/Tadataka_Takahashi/items/f13161b981a8699f46ff	apachehop	2022-04-30 10:24:02
Ruby	Railsタグが付けられた新着投稿 - Qiita	[Rails]RSpecでbinding.pryがNoMethodError: undefined method `pry' for *** になるときの対処法。	https://qiita.com/hajsu00/items/03c68c8c62dfa692dfbf	bindingpr	2022-04-30 10:14:23
海外TECH	DEV Community	Trail VFX with SpriteKit	https://dev.to/johansteen/trail-vfx-with-spritekit-3dia	Trail VFX with SpriteKitVisual Effects are an important part of making pleasing effects in games Commonly VFX is used for things like bullets projectile trails magic portals and countless other things I was doing research some time ago on how to be able to replicate some common VFX techniques in SpriteKit More specifically I wanted to be able to make trailing effects to spice up the look of bullets as the player upgraded them while progressing through the game This is the kind of effect I ended up with using only the functionality provided by SpriteKit Trailing VFX BreakdownLet s start by breaking down how an effect like this is usually constructed and then we continue on how to implement those techniques using SpriteKit The effect is based on having a seamless trail texture This can be created in Photoshop quite easily with some random strokes and then matching up the edges with the offset filter to make it seamless But that s out of the scope of this article Moving the Trail IndependentlyWe are going to apply this texture on a plane which is the VFX object that we will add to and move around in our game world To make the texture feel dynamic instead of static we are going to tweak the UV coordinates which controls how the texture maps to the plane When we compress the V position of the coordinates on one edge of the UV we effectively squeeze the texture located on the opposite edge so we get a tapered effect on the texture from one edge to the other And here comes the beauty if we move this plane over the scene and at the same time we also move the U position of the texture at a different speed than the plane is using the texture comes alive and we get a sense that the texture constantly evolves and animates during its lifetime instead of just statically move over the scene Working with a UV like this the possible effects can be taken much further We could alter the UV using a curved shape instead of a linear falloff or segment it up and randomly adjust each segment s size slightly to break up the movement and move it even further away from a static texture Fading Out the Trail EdgeNext we are going to need to fade out the edge of the trail so it doesn t cut off abruptly We will do that with the help of a gradient map The gradient map is the top layer of the stack which we are using to control the opacity of the effect This layer will remain in place and not move over the UV like the trail texture does By doing a multiply blend of the top gradient layer with the layers below we end up with a nice fade out at the edge of the trail Additional TweaksTo give the trails a bit more flare and depth we are going to duplicate the trail texture two or three times and stack them on top of each other Each copy will have the texture slightly offset and move over the UV at a slightly different speed This gives us tons of dynamic variation as the effect moves over the game scene In the video of my SpriteKit effect above I ve layered the trail texture two times and each layer moves with different speed values and is then blended together And for the final touch to make it glow top it off with a bit of bloom SpriteKit ImplementationThat was it for the theory and how one would achieve this kind of effect in most graphics and game systems So let s see how we can approach this using SpriteKit and get into the nitty gritty details with some code The biggest challenge is that we don t have access to manipulate UV coordinates when we map textures to nodes in SpriteKit With SceneKit it would have been a different story but oh well As game VFX is often heavily based on manipulating UVs we have to come up with some workarounds to achieve similar outcomes The Trail SetupThe trail layer would usually rely heavily on manipulating UVs As we don t have access to UVs in SpriteKit let s see what we would need the UVs to do and then find SpriteKit solutions With UVs textures can easily be repeated so when the texture leaves the surface on one edge it wraps around and comes in on the opposite edge UVs allow us to compress and resize parts of the texture independently of how the displayed surface is sized As SKSpriteNode does not have functionality to move and wrap a texture applied to it we ll solve it by repeating the texture ourselves parent the repeated setup to a container node and then crop out the visible area We ll have to handle the wrapping ourselves We will need three repetitions of the texture which is enough no matter at what position we are observing it to have enough repeating texture on each side to always be covered This setup will allow us to move the projectile texture independently of the parent node So let s begin with setting up the trail I put this into it s own method so we can potentially create multiple layers of the same trail and stack for variation func makeTrail gt SKNode let trailC SKSpriteNode imageNamed trailTexture let trailL SKSpriteNode imageNamed trailTexture let trailR SKSpriteNode imageNamed trailTexture trailL position x trailR position x let trails SKNode trails addChild trailC trails addChild trailL trails addChild trailR return trails We simply create the three instances we need of the texture We have one centered and then we move one to the left of it and one to the right of it In the example above the texture is points wide so I ve hard coded the values and to move each segment to the left and right We could have got this value from the texture itself to make it more reusable We then parent all the segments to an SKNode and return this hierarchy This trail object is basically what we need to be able to move and wrap the trail texture independently Now we can call makeTrail whenever we need a new trail to build and layer up an effect override func didMove to view SKView Get wrapable trails let trail makeTrail let trail makeTrail Make the second trail slightly taller and change the blend mode to add trail zPosition trail yScale for child in trail children if let child child as SKSpriteNode child blendMode add Setup continues In this example we create two trail objects so we can layer them on top of each other for more variation that will help sell the effect as a non static texture The second trail object is made slightly larger by scaling it to on the y axis The second trail is placed on top of the first so each child of the second trail has its blendMode changed to add Move and Wrap the TextureTime to get the texture moving We will use the SKCropNode to get a window that we can observe our trail object through and then give the trail object that holds the texture its own movement loop The crop node can then move around on the screen while the trail texture moves and wraps independently beneath it override func didMove to view SKView Setup continued Create a huge hidden background This is explained further in the taper part We need this for the warpGeometryGrid let bg SKSpriteNode color black size init width height bg zPosition bg isHidden true Mask with the crop node let mask SKSpriteNode color red size init width height let crop SKCropNode crop maskNode mask crop addChild bg crop addChild trail crop addChild trail Setup continues The huge background we create here is a story by itself that is related to SpriteKit s geometry warping behavior So it will be explained further once we get to the taper section We add it here as it needs to be a child to the crop node SKCropNode needs a mask that defines our cropping area The mask is basically our window where we can see what s inside the crop node and the size of the mask becomes the size of our effect So the mask is of the same height as the trail texture so we can fully see it but much less wide as we will keep moving the trail texture and only want to see a part of it horizontally So after setting the mask we just keep adding children the trails and the background that we want to see through the crop node override func didMove to view SKView Setup continued Keep moving the trails through the crop node let move SKAction moveTo x duration let move SKAction moveTo x duration trail run repeatForever sequence move move let move SKAction moveTo x duration let move SKAction moveTo x duration trail run repeatForever sequence move move Setup continues We then need to move the trail texture We use SKAction moveTo x duration to add the texture movement Each trail needs two move actions The first action has a duration of as it moves the texture back to its starting position This is basically the wrap around And the second move action animates the texture to move to the other side of the visible area The duration value here sets the speed We put both move actions into a sequence that we repeat forever In this example we use two trails stacked on top of each other so we move the second trail with a different duration to get a different speed so it adds visual variation Potentially we could also offset the move x value for one of the trails for even more variation And there we have it a parent node the crop node that can be moved in the game scene while a texture moves independently inside it that wraps around This setup gives us the same behavior as the first of the two UV bullet points Fade the EdgeTo fade out the edge of the effect we will do pretty much exactly as theorized above We ll take a gradient map image and multiply it on top of the effect override func didMove to view SKView Setup continued let opacity SKSpriteNode imageNamed trailTexture gradient opacity blendMode multiplyAlpha opacity zPosition Setup continues We prepare an object with the gradient texture and set its blendMode appropriately so we can fade out the edge of the effect We will add the node to the effect hierarchy togetherwith the taper effect in the next step Another approach I ve been considering is to use an SKShader that should be able to do the same thing but which would be cleaner and more efficient Taper the TextureIt s time to deal with the tapering of the trail effect by using a SpriteKit implementation for the second bullet point from the list with UV behaviors we are trying to replicate The closest I ve got is to use an SKEffectNode with warpGeometry override func didMove to view SKView Setup continued The effect node to warp let effect SKEffectNode effect addChild crop effect addChild opacity Create the tapered coordinates let destinationPositions vector float vector float vector float vector float vector float vector float vector float vector float vector float vector float let warpGeometryGrid SKWarpGeometryGrid columns rows Apply the tapered effect effect warpGeometry warpGeometryGrid replacingByDestinationPositions positions destinationPositions Control the quality of the distortion effect effect subdivisionLevels Setup continues We distort the trail by using SKWarpGeometryGrid Basically we just create a grid of coordinates where we can squeeze the right side of the node together so when the trail moves over the effect node it gets compressed on the right side whileit spreads out and widens on the left side This approach works fine if used isolated but as with many SpriteKit things it gets a tad more complicated when combining parts together Use the subdivisionLevels property of the effect node to get rid of distortion blockiness and get a much smoother and crisper look Higher values do affect performance Do you remember this from before when we created the huge background let bg SKSpriteNode color black size init width height bg isHidden trueNow is the time to talk about it The huge hidden background is there to ensure that the warpGeometryGrid coordinates stay in put The warp does not respect the cropped area By having a larger than we need background the warp will not move around Otherwise as the trails move over the node it instead calculates the unit coordinates based on howlarge it sees all nodes added together for each frame The large background counters that behavior and helps it keep consistent It s not a pretty solution but that s how far I ve been able to take it with SpriteKit alone Using a CIFilter might be worth exploring as an alternative option a transform there might behave more consistent than using warpGeometry Talking about CIFilter as we have an effect node created already why not keep using it override func didMove to view SKView Setup continued Add an additional bloom on top of the effect let bloomFilter CIFilter name CIBloom bloomFilter setValue forKey inputRadius bloomFilter setValue forKey inputIntensity effect filter bloomFilter Setup continues The effect node can take a CIFilter among its properties so let s go ahead and use it to add a bloom filter to enhance the effect further Move the Full Trail EffectWith the entire effect layered up and organized in a hierarchy under the effect node we can now simply move the trail wherever we need it to be my moving the effect node around override func didMove to view SKView Setup continued Move the entire projectile over the screen effect run SKAction moveTo x duration effect addChild crop And that s all there is to it We start an animation where we want the projectile to go and then add it to the scene In this article I ve out of convenience just added the setup inside the didMove to method It would make more sense to have this functionality in a trailEffect gt SKNode method that would setup the trail and return its node to have it instantiated on demand The returned node can then get the appropriate movement action assigned and then added to the scene Performance wise using SKEffectNode and SKCropNode can be heavy Keeping the dimensions down on the effect should have a positive effect on performance Next StepsEven though the fact that this solution can not compete with what you can do with the modern game engines out there and also that the solution uncovers a few flaws aka bugs with SpriteKit it can still provide a lot of power and usefulness for SpriteKit projects A dynamic trail VFX can be the building block and foundation of many different effects Continuing building on the trails in this example I ll add a head to the trails using something like an animated flare On top of that a small particle emitter could be added as the final layer emitted some sparkling texture to help bring the effect to life	2022-04-30 01:31:21
海外科学	NYT > Science	Started Out as a Fish. How Did It End Up Like This?	https://www.nytimes.com/2022/04/29/science/tiktaalik-fish-fossil-meme.html	fossil	2022-04-30 01:20:54
医療系	内科開業医のお勉強日記	慢性不応性咳嗽：高次皮質脳障害との機能・構造の関連性	https://kaigyoi.blogspot.com/2022/04/blog-post_30.html	左前頭部灰白質体積の減少は、咳の持続時間の長さと関連していた。	2022-04-30 01:23:00
海外ニュース	Japan Times latest articles	U.S. and Japan defense chiefs to meet Wednesday to discuss Ukraine war and China	https://www.japantimes.co.jp/news/2022/04/30/national/nobuo-kishi-us-visit-2/	U S and Japan defense chiefs to meet Wednesday to discuss Ukraine war and ChinaRussia s invasion of Ukraine is generating renewed awareness in Japan of the need for deterrence and enhanced readiness against any possible attempt to change the	2022-04-30 10:49:42
海外ニュース	Japan Times latest articles	Rules-based order crucial amid Ukraine crisis, Kishida tells Indonesian leader	https://www.japantimes.co.jp/news/2022/04/30/national/politics-diplomacy/kishida-southeast-asia-europe/	Rules based order crucial amid Ukraine crisis Kishida tells Indonesian leaderKishida is on an eight day tour that will also take him to Vietnam and Thailand as he attempts to gain cooperation in opposing Russia s war	2022-04-30 10:30:28
海外ニュース	Japan Times latest articles	‘Bldg. N’: Paranormal scares turn plain silly	https://www.japantimes.co.jp/culture/2022/04/30/films/film-reviews/bldg-n/	Bldg N Paranormal scares turn plain sillyMinori Hagiwara s commitment to portraying a college student terrorized by ghosts and cult members isn t enough to rescue Yosuke Goto s increasingly wacky horror film	2022-04-30 10:10:38
ニュース	BBC News - Home	Ukraine war: US accuses Russia of depravity and brutality	https://www.bbc.co.uk/news/world-europe-61280409?at_medium=RSS&at_campaign=KARANGA	ukraine	2022-04-30 01:52:10
ニュース	BBC News - Home	British Virgin Islands: UK Minister dispatched for governance talks	https://www.bbc.co.uk/news/uk-61280587?at_medium=RSS&at_campaign=KARANGA	recommendations	2022-04-30 01:56:04
北海道	北海道新聞	渡辺雄太「充実したシーズン」　ラプターズ、ＮＢＡ４季目	https://www.hokkaido-np.co.jp/article/675986/	渡辺雄太	2022-04-30 10:06:00
北海道	北海道新聞	「青の洞窟」巡り営業開始　観光船「安全を最優先」　知内、福島	https://www.hokkaido-np.co.jp/article/675885/	福島町岩部	2022-04-30 10:02:42