ARCoreの導入から応用まで @ABC 2018 autumn

by Kenichi Takahashi

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"3$PSFͷಋೖ͔ΒԠ༻·Ͱ !"#$BVUVNO גࣜձࣾΧϒΫߴڮݑҰ

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@ken1_taka ktaka גࣜձࣾΧϒΫιϑτ΢ΣΞΤϯδχΞ ߴڮݑҰ w ܞଳ޲͚%άϥϑΟΫεΤϯδϯ΍ɺੲ͋ͬ ͨ๭"3ΞϓϦͷ։ൃʹܞΘΔ w ݱࡏ͸ΧϒΫͰ%άϥϑΟΫεͷϨϯμϦϯ ά͓ΑͼղੳΤϯδϯͷ࣮૷Λ୲౰ w ݸਓత׆ಈͱͯ͠"373ͷ࣮ݧΛ͢Δ๣Β຋ ༁ຊΛग़ͨ͠Γɺٕज़ܥࡶࢽ΁ͷղઆهࣄΛد ߘ͢ΔͳͲ͍ͯ͠Δ

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6OJUZʹΑΔʙຊͷ຋༁

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ࠓ೔ͷ಺༰ w "3$PSFʹ͍͓ͭͯ͞Β͍ w جຊػೳ w "3$PSFҎ߱Ͱ௥Ճ͞Εͨ৽ػೳ w ։ൃํ๏ w +BWB 4DFOFGPSN w 6OJUZ

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"3$PSFʹ͍͓ͭͯ͞Β͍

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"3$PSFͱ͸ w "OESPJEͰ"3ΞϓϦΛ࣮ݱ͢ΔͨΊͷ(PPHMF७ਖ਼ϥΠϒϥϦ w "OESPJEεέʔϧͰ޿͘ීٴΛ໨ࢦ͢ NJMMJPO

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"3$PSFͷجຊػೳ

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.PUJPOUSBDLJOHʢϞʔγϣϯτϥοΩϯάʣ IUUQTEFWFMPQFSTHPPHMFDPNBSEJTDPWFSDPODFQUT$$#:

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ϞʔγϣϯτϥοΩϯά w "3$PSF΍"3,JUΛ࢖͑ΔΑ͏ ʹͳͬͯҰ൪خ͍͠ͷ͸ʜ͜ Μͳ෩ʹճΓࠐΊΔ͜ͱ

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&OWJSPONFOUBMVOEFSTUBOEJOHʢ؀ڥೝࣝʣ IUUQTEFWFMPQFSTHPPHMFDPNBSEJTDPWFSDPODFQUT$$#:

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ฏ໘ͷݕग़ w ਫฏͱਨ௚ͷฏ໘Λೝࣝ w ͔Βਨ௚໘΋Մೳʹ

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0SJFOUFE1PJOUT ʢํ޲Λ͍࣋ͬͯΔ఺ʣ w ฏ໘ͱͯ͠ݕग़Ͱ͖Δͷ͸ਫ ฏ͓Αͼਨ௚ͷ໘ w ͨͩ͠ɺಛ௃఺ͱͯ͠ݕग़͠ ͨ఺ͷํ޲Λऔಘ͢Δ͜ͱ͸ Ͱ͖Δ w ಛ௃఺͕ີू͍ͯ͠ΔΑ͏ͳ ৔ॴͩͱݕग़͠΍͍͢ʣ

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-JHIUFTUJNBUJPOʢޫݯਪఆʣ IUUQTEFWFMPQFSTHPPHMFDPNBSEJTDPWFSDPODFQUT$$#:

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ޫݯਪఆ w पғͷ໌Δ͞ͷมԽ͔Βޫ ͷڧ͞Λਪఆ w ޫͷ౰ͨΔํ޲͸औಘͰ͖ ͳ͍

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"3$PSFҎ߱ Ͱ௥Ճ͞Εͨػೳ

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$MPVE"ODIPST w ෳ਺୺຤Ͱಉ͡"3ۭؒΛڞ༗ w ͭͷ୺຤͔ΒΫϥ΢υΛ௨͡ ͯଞͷ୺຤ʹڞ༗ w "ODIPSΦϒδΣΫτ w पลͷಛ௃఺ w "OESPJE͚ͩͰͳ͘J04ͱ΋ڞ ༗ w J04༻ͷ4%,΋͋Δ

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+VTUB-JOF w (PPHMF੡ͷ"3ۭؒʹམॻ͖ Ͱ͖ΔΞϓϦ w "OESPJE൛ͱJ04൛͕͋Δ w /FBSCZͰϖΞϦϯάͯ͠୆ Ͱ"3ۭؒΛڞ༗ w ιʔε͸ެ։͞Ε͍ͯΔ IUUQTHJUIVCDPNHPPHMFDSFBUJWFMBCKVTUBMJOFBOESPJE

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+VTUB-JOF w (PPHMF੡ͷ"3ۭؒʹམॻ͖ Ͱ͖ΔΞϓϦ w "OESPJE൛ͱJ04൛͕͋Δ w /FBSCZͰϖΞϦϯάͯ͠୆ Ͱ"3ۭؒΛڞ༗ w ιʔε͸ެ։͞Ε͍ͯΔ IUUQTHJUIVCDPNHPPHMFDSFBUJWFMBCKVTUBMJOFBOESPJE

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$MPVE"ODIPSTͷେࣄͳ͜ͱ w ໘౗Λݟͯ͘ΕΔͷ͸Ґஔͱ޲͖ͷΈ w ͦΕΛݩʹ։ൃऀ͕ػೳΛ࣮૷͢Δඞཁ͋Γ w ڞ༗͢Δ"ODIPSͷ৘ใ͸'JSFCBTF΍/FBSCZ౳Λ࢖ͬ ͯ౉͢

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͜ͷ͋ͱͷίʔυϥϘͰ ମݧͰ͖·͢ w $MPVE"ODIPSTͰυϩΠυ܅ ͷ഑ஔ৘ใΛڞ༗ w ΞϯΧʔͷ*%͸'JSFCBTFΛ࢖ͬ ͯଞͷ୺຤ͱڞ༗ w +BWBΛ࢖༻ IUUQTDPEFMBCTEFWFMPQFSTHPPHMFDPNDPEFMBCTBSDPSFDMPVEBODIPST

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"VHNFOUFE*NBHFT w ࢦఆͨ͠ը૾Λೝࣝͯ͠ɺҐ ஔͱ࢟੎ΛτϥοΩϯά͢Δ

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ରԠ୺຤ w ݱࡏͷ"3$PSFͷόʔδϣϯ͸ w όʔδϣϯΛॏͶΔ͝ͱʹର Ԡ୺຤΋͍ͩͿ૿͑·ͨ͠ w 9QFSJB9; w (BMBYZ" " " /PUF 4 4 4 w -(( )VBXFJ1౳ IUUQTEFWFMPQFSTHPPHMFDPNBSEJTDPWFSTVQQPSUFEEFWJDFT

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։ൃํ๏ +BWB $ /%, 6OJUZ 6OSFBM&OHJOF 8FCͷԿΕͰ΋Մೳ

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+BWBͰͷ։ൃ 4DFOFGPSNʹ͍ͭͯ

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4DFOFGPSNͱ͸ w %ϞσϧͷΠϯϙʔτπʔϧɺ"3γʔϯ΁ͷ૊ΈࠐΈ ͕؆୯ʹͰ͖ΔϥΠϒϥϦ w "OESPJE4UVEJPͰ+BWBͰ։ൃͰ͖·͢

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https://developers.google.com/ar/develop/java/sceneform/ l"OESPJE։ൃऀʹ%άϥϑΟΫεͱ0QFO(-Λ ֶͿ͜ͱͳ͠ʹ"3$PSFΛۦ࢖͢ΔྗΛ༩͑Δz

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࠷΋جຊతͳखॱ

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"OESPJE4UVEJPʹ ϓϥάΠϯΛΠϯετʔϧ͢Δ w 1SFGFSFODFTˠ1MVHJOT <#SPXTFSFQPTJUPSJFT>Λԡ͠ ͯ w (PPHMF4DFOFGPSN5PPMT #FUB ΛΠϯετʔϧ

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1PMZ͔Β%ϞσϧΛ μ΢ϯϩʔυ͢Δ w IUUQTQPMZHPPHMFDPN͔ Β%ϞσϧΛμ΢ϯϩʔυ w ओʹ"3ͱ73Ͱͷ׆༻Λ໨త ͱͨ͠%Ϟσϧڞ༗αΠτ w $$#:Ͱ࢖༻Ͱ͖Δ΋ͷ͕ଟ ͍

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%ϞσϧΛϓϩδΣΫτʹ Πϯϙʔτ w μ΢ϯϩʔυͨ͠ w YYYQOH w YYYNUM w YYYPCK w Λ4BNQMFEBUBʹίϐʔ

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%ϞσϧΛϓϩδΣΫτʹ Πϯϙʔτ̎ w YYYPCKΛӈΫϦοΫ ˠ/FXˠ4DFOFGPSN"TTFU ͷॱʹબ୒ w 'JOJTIΛԡ͢

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%ϞσϧΛϓϩδΣΫτʹ Πϯϙʔτ w YYYTGB YYYTGCͱ͍͏ϑΝΠ ϧ͕࡞੒͞ΕΔ w %ϞσϧͷϓϨϏϡʔ͕දࣔ ͞ΕΔ w TGCͷํ͸BTTFUTͷԼʹஔ͔Ε Δ

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ίʔυ্ʹϩʔυ͢Δ ϑΝΠϧΛهड़͢Δ w BTTFUTͷԼͷTGCϑΝΠϧΛ ࢦఆ͢Δ

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Ϗϧυ࣮ͯ͠ߦ w ฏ໘Λλοϓͯ͠%ϞσϧΛ ഑ஔ͢ΔͨΊʹඞཁͳػೳ͕ ͜Ε͚ͩͰҰ௨Γ׬੒ʂ

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4DFOFGPSNͷߏ੒ཁૉ w "S'SBHNFOU w 3FOEFSBCMF w .PEFM3FOEFSBCMF w 7JFX3FOEFSBCMF

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"S'SBHNFOU w ୺຤Λಈ͔͢͜ͱΛଅ͢6*  w ೝࣝฏ໘Λࣔ͢6*  w ฏ໘Λλοϓͨ͠ࡍͷMJTUOFS  w ฏ໘ʹӨΛམͱ͢ 

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.PEFM3FOEFSBCMF w %ϞσϧΛѻ͏

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7JFX3FOEFSBCMF "OESPJE։ൃऀʹ͸͓ͳ͡ΈͷMBZPVUͷYNMΛ"3্ۭؒʹු͔Ϳ7JFX ͱͯ͠࡞੒Ͱ͖Δʂ

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7JFX3FOEFSBCMF࡞੒खॱ 7JFX3FOEFSBCMFCVJMEFS TFU7JFX UIJT 3MBZPVUTPMBS@DPOUSPMT CVJME CBDLHSPVOE ʢؙ֯ɺ൒ಁ໌ͷ੨ʣ MBZPVUYNM "1*

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͜ͷ͋ͱͷίʔυϥϘͰ ମݧͰ͖·͢ w 4DFOFGPSNΛ࢖ͬͯछྨͷ% ϞσϧΛ഑ஔ w ࣸਅΛࡱͬͯอଘ w ͓·͚ͷ՝୊ w ೚ҙͷจࣈྻΛ 7JFX3FOEFSBCMFͰ഑ஔ w IUUQCJUMZ+#PJ2# IUUQTDPEFMBCTEFWFMPQFSTHPPHMFDPNDPEFMBCTTDFOFGPSNJOUSP

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4DFOFGPSNͷ ϨϯμϦϯάΤϯδϯ w ෺ཧϕʔεͷϨϯμϦϯάΤϯ δϯ w ϥΠςΟϯάͷޮՌͳͲ͕ लҳ w Φʔϓϯιʔε w IUUQTHJUIVCDPN HPPHMFpMBNFOU

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4DFOFGPSNͷ௥Ճػೳ w HM5'Λ௚઀ϩʔυ w HM5'ʜωοτܦ༝Ͱͷ%Ϟσϧͷ ΍ΓऔΓͰඪ४తͳҐஔΛ֫ಘͭ͠ ͭ͋Δ w "OESPJE4UVEJPͷϓϥάΠϯͰͷ ม׵͕ෆཁ

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΋ͬͱݱ࣮Λ֦ு͍ͨ͠ʜ ͦΜͳ࣌ʹཔΓʹͳΔͷ͸ 6OJUZ

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͜ͷ͋ͱͷίʔυϥϘ 6OJUZฤ Ͱ࡞Δ΋ͷ IUUQTDPEFMBCTEFWFMPQFSTHPPHMFDPNDPEFMBCTBSDPSFJOUSP

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ྫ6OJUZͰ$MPVE"ODIPSTΛ࢖ͬͯ ෳ਺ਓͰϓϨΠ͢Δαϯϓϧ w -JHIU#PBSE w Φʔϓϯιʔε w IUUQTHJUIVCDPN HPPHMFTBNQMFTBSDPSF MJHIUCPBSE

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ྫɿ"3ۭؒͰϖοτΛࣂ͏ w ඞཁͳཁૉ w Ξχϝʔγϣϯ͢Δ%Ωϟ ϥ w ෺ཧΤϯδϯ w ஄ΉϘʔϧ w ϘʔϧΛ௓Ͷฦ͢চ໘ w ஫໨ͯ͠΄͍͠΋ͷʹ޲͚Δ

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Ξχϝʔγϣϯ͢Δ%Ωϟϥ w "TTFU4UPSF͔ΒΠϯϙʔτͯ͠"OEZͱஔ͖׵͑Ͱ0,

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෺ཧΤϯδϯͷ׆༻ w ෺ཧ๏ଇʹԊͬͨৼΔ෣͍Λ ͢ΔϘʔϧ w ϘʔϧΛ௓Ͷฦ͢ฏ໘

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෺ཧ๏ଇʹԊͬͨৼΔ෣͍Λ͢ ΔϘʔϧ w 4QIFSF$PMMJEFS w #PVODZ w 3JHJECPEZ w .BTT w 6TF(SBWJUZ

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ϘʔϧΛ௓Ͷฦ͢ฏ໘ w .FTI3FOEFSFS w .BUFSJBMʹ4%,ʹ͋Δ 1MBOF(SJEΛઃఆ

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ϘʔϧΛ౤͛Δίʔυ ΦϒδΣΫτΛλοϓͨ࣌͠

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ϘʔϧΛ౤͛Δίʔυ ΦϒδΣΫτΛυϥοάʢϑϦοΫʣ։࢝

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ϘʔϧΛ౤͛Δίʔυ ΦϒδΣΫτΛυϥοά͍ͯ͠Δؒ

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ϘʔϧΛ౤͛Δίʔυ ΦϒδΣΫτͷυϥοάऴྃʢࢦΛ཭ͨ͠ʣ

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%ΦϒδΣΫτͱΧϝϥ ͷҐஔؔ܎ ᶃೣͷݱࡏҐஔ ᶄΧϝϥͷݱࡏҐஔ ᶅೣͷσϑΥϧτํ޲ͷϕΫτ ϧʢ9 : ;Ͱද͢ͱ ʣ ᶆೣ͔ΒΧϝϥ΁ͷํ޲ͷϕΫ τϧ ᶇΧϝϥͷํʹ޲͔ͤΔͨΊͷ ճస

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ΦϒδΣΫτΛΧϝϥͷํ޲ʹ ޲͚Δࡍͷճస Vector3 GetLookVector () { Vector3 lookVector = Camera.main.transform.position - hitTransform.transform.position; lookVector.y = 0.0f; // Y軸の差分は無視する lookVector.Normalize (); return lookVector; } hitTransform.transform.rotation = Quaternion.LookRotation (GetLookVector());

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ྫ%ϓϦϯτ෩ΤϑΣΫτ ࢦఆͨ͠:࠲ඪͷ9;ฏ໘ͰΫϦοϐϯά͢ΔγΣʔμʔͷهड़ͱɺͦͷ:࠲ඪͷ஋ ΛϑϨʔϜ͝ͱʹҠಈͤ͞ΔεΫϦϓτͷ૊Έ߹ΘͤͰ࣮ݱ

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௥Ճ͢ΔγΣʔμʔͷϓϩύςΟ w @$POTUSVDU: w ΫϦοϐϯά͢Δ:࠲ඪͷ஋ w @$POTUSVDU(BQ w ੵ૚͍ͯ͘͠ࡍʹ৭Λม͑Δڥ քͷߴ͞ w @$POTUSVDU$PMPS w ੵ૚͍ͯ͘͠ࡍͷڥքͷ৭ ৄࡉ͸IUUQTXXXLBCVLVDPKQEFWFMPQFSTBSE@QSJOU

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γΣʔμʔͷίʔυ if(IN.worldPos.y > _ConstructY + _ConstructGap) { discard; } ඳը͞Εͳ͍Α͏ΫϦοϐϯά͢ΔॲཧͰ͢ɻ ϐΫηϧͷϫʔϧυҐஔͷ:࠲ඪͷ஋͕ʮΫϦοϐϯά͢Δ:࠲ඪڥ քͷߴ͞ʯΑΓେ͖͍ʢΫϦοϐϯά͢ΔҐஔΑΓߴ͍Ґஔʹ͋Δʣ৔ ߹ɺEJTDBSEͯ͠ඳը͠ͳ͍Α͏ʹ͠·͢ɻ

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γΣʔμʔͷίʔυ if(IN.worldPos.y < _ConstructY) { ﬁxed4 c = tex2D(_MainTex, IN.uv_MainTex); o.Albedo = c.rgb; o.Alpha = c.a; } else { o.Albedo = _ConstructColor.rgb; o.Alpha = _ConstructColor.a; } ϐΫηϧͷϫʔϧυҐஔͷ:࠲ඪͷ஋͕ΫϦοϐϯά͢Δ:࠲ඪΑΓখ͍͞৔ ߹ɺ௨ৗඳըͷର৅ͱͯ͠ςΫενϟ͔Βͷ৭Λ൓ө͠·͢ɻ:࠲ඪͷ஋Ҏ্ ͷ৔߹ɺڥք෦෼ͷඳըର৅ͱͯ͠ڥքͷ৭Λ൓ө͠·͢ɻ

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࠷ޙʹʜ ೔ຊޠͰ࣭໰ɺ૬ஊͰ͖ΔϑΥʔϥϜ IUUQCJUMZWSBS@KB ͥͻ͝ొ࿥͍ͩ͘͞ʂ ೔ຊޠͰؾܰʹ࣭໰ɺ૬ ஊͰ͖ΔΑ͏ʹཱͯͯΈ ·ͨ͠ (PPHMFΞΧ΢ϯτ͕͋Ε ͹ԿํͰ΋ࢀՃՄೳͰ͢