広大なフィールドを気持ちよく駆け抜けるための技術.pdf

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広⼤なフィールドを   気持ちよく駆け抜けるための技術 Akatsuki Games / Client Engineer ⽩狐 (WhiteFox)

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Self Introduction )/നޅ ͼΌͬ͜   ଔΫϥΠΞϯτΤϯδχΞ झຯ   λΠϐϯάʢΨν੎ɺಛʹ೔ຊޠϩʔϚࣈʣ   ฏۉLFZTɺτοϓεϐʔυLFZT   ๭େձͰ༏উ͠จ෦Պֶେਉ৆ड৆ͨ͜͠ͱ΋͋Δ Իήʔ   ΞʔέʔυԻήʔ͕޷͖ʢࣗ୐؀ڥ͋Γʣ ͓͍͍͠৯΂෺Λ୳͢   ͝൧԰͞ΜɺεΠʔπళΛ։୓͢Δͷ͕޷͖ ˛ຖ೥มΘΔࣗ࡞ΞΠίϯ   ΠϥετɺΩϟϥσβ΋   झຯͰ΍ͬͯΔ ˛ݚमͰΧδϡΞϧͳ   %ήʔϜ੍࡞ʹॳ௅ઓ

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Φʔϓϯϫʔϧυʂ ΦʔϓϯϫʔϧυྲྀߦΓͰ͢ΑͶʂ   Φʔϓϯϫʔϧυͷఆٛ͸ׂͱᐆດ   ։͔ΕͨϚοϓɺγʔϜϨεͳϚοϓ͙Β͍ͷҙຯͰଊ͍͑ͯͩ͘͞ ࠷ۙ͸ϞόΠϧ୺຤ͷεϖοΫͰ΋   ϦονͳάϥϑΟοΫͰ༡΂Δ   ΞΧπΩήʔϜεͷࠓ೥ͷ৽ଔݚमͰ͸ʜʜ 514 5IJSE1FSTPO4IPPUJOH Λ   ʙਓνʔϜͰिؒఔ౓Ͱ࡞੒   ˠ࣮ࡍʹઌഐΤϯδχΞʹ༡ΜͰ͍͍ͨͩͨ ࠓճ͸ݚम౰࣌ʹ࣮ࡍʹࢼͨ͠   άϥϑΟοΫෛՙܰݮͷํ๏Λ͍͔ͭ͘঺հ͠·͢ʂ ˛514࡞੒ͷ࣮ࡍͷը໘ɻ6*ʹ6OJUZष͞͸࢒͕ͬͨ   ɹͪΌΜͱ༡΂ͨ

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४උ ϑΟʔϧυͷ࡞੒   6OJUZͷ5FSSBJOΛ࢖͏   ى෬ͷ͋Δ஍ܗʹ໦Λͨ͘͞Μੜ΍͢   ໦͸l4UBOEBSE"TTFUTzʹೖ͍ͬͯͨ#SPBEMFBG ϓϨΠϠʔ͕ૢ࡞Ͱ͖ΔΩϟϥΫλʔΛ༻ҙ   l4UBSUFS"TTFUT5IJSE1FSTPO$IBSBDUFS$POUSPMMFSz   ͱ͍͏'3&&ͷΞηοτΛར༻ ຊεϥΠυͰ͸͜ͷ޻෉͕΄΅ͳ͍ঢ়ଶΛ   ʮॳظঢ়ଶʯͱݺͿ͜ͱʹ     ϑϥελϜΧϦϯάͷΈద༻͞Ε͍ͯ·͢ʢઆ໌͸ޙड़ʣ

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ॳظঢ়ଶͰεϚϗͰςετϓϨΠ ݕূ୺຤ "OESPJE ͱ   നޅͷJ1IPOF9ͰςετϓϨΠ   ʢ"OESPJEͷεϖοΫ͸ׂͱऑ͍ʣ 1SP fi MFSͰύϑΥʔϚϯεΛܭଌ   "OESPJEGQTલޙ   J1IPOF9GQTʙGQTఔ౓ ؾ࣋ͪΑ͘ۦ͚ൈ͚ΔͲ͜ΖͰ͸ͳ͍

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ಈ࡞͕ॏ͍ཧ༝ ϙϦΰϯͷඳը͕ଟ͗͢Δʂ   ˞ϙϦΰϯ͜͜Ͱ͸ɺ%ΦϒδΣΫτΛߏ੒͢Δʮ໘ʯ   ʢྫཱํମ͸ਖ਼ํܗͷϙϦΰϯ͕ͭʣ   ࠓճͷ৔߹ɺओʹʮ໦ʯͷϙϦΰϯ͕ଟ͍ 7FSUT   ը໘ʹඳը͞ΕΔΦϒδΣΫτͷ௖఺ͷ߹ܭ਺   ࠓճ͸ສఔ౓     5SJT   ௖఺Ͱߏ੒͞Εͨࡾ֯ܗͷϙϦΰϯͷ߹ܭ਺   ࠓճ͸ສఔ౓ 1$ͩͱ͍͚Δ͕ɺϞόΠϧ୺຤Ͱ͸ݫ͍͠

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ղܾࡦ ɾ-0%   ɾΧϦϯά ࠓճ͸6OJUZଆͰઃఆͰ͖Δͪ͜ΒͷೋͭΛ঺հ͠·͢ʂ ˞%ϞσϧΛ௚઀͍͡ΔΞϓϩʔν΋ɺ΋ͪΖΜ༗ޮͰ͢   ɹݚमͰ͸#MFOEFSͰϞσϧΛ͍ͬͯ͡ϙϦΰϯ਺ܰݮͱ͔΋΍Γ·͕ͨ͠ɺ   ɹΤϯδχΞͷٕज़ͱ͍͏ΑΓΞʔςΟετ͞ΜدΓͷ࿩ͳͷͰׂѪ͠·͢

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LOD (Level of Detail)

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-0% -FWFMPG%FUBJM Χϝϥ͔Βͷڑ཭ʹΑͬͯϞσϧͦͷ΋ͷΛมߋ   Χϝϥ͔Βԕ͍ΦϒδΣΫτ΄Ͳૈ͍ΦϒδΣΫτΛදࣔ ࣗಈతʹૈ͘දࣔͯ͘͠ΕΔΘ͚Ͱ͸ͳࣗ͘લͰϞσϧΛ༻ҙ͢Δ

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-0% -FWFMPG%FUBJM 4UBOEBSE"TTFUTʹ͋ͬͨ#SPBEMFBGͷ   σϑΥϧτઃఆͷ-0%Ϟσϧͱ   ύϥϝʔλΛར༻   Ϟσϧ਺͸ʢ඼࣭ߴɺதɺ௿ɺۃ௿ʣ ॳظঢ়ଶ͔Β-0%Λద༻ͨ͠ͱ͜Ζ   ϙϦΰϯ਺͕ສˠສʙສ·Ͱ   ࡟ݮʂ "OESPJEGQTˠGQTʙGQTલޙ   J1IPOF9GQTୡ੒ʂʂ    

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-0%ద༻લޙͷϓϨʔը໘ #FGPSF "GUFS ໨ΛڽΒͤ͹"GUFSͷํ͸ૈ͍ඳ͕ࣸ͋ΔͱΘ͔Δ΋ͷͷ   ϓϨʔʹເதͩͱؾʹͳΒͳͦ͞͏

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ΧϦϯά(Culling )

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ϑϥελϜΧϦϯά 6OJUZͷΧϝϥʢϑϥελϜ<ਲ਼ମ>ΧϦϯάʣ   Χϝϥͷਖ਼໘ํ޲ʹਲ਼ମ͕ݱΕΔ   ͜ͷਲ਼ମͷ಺෦ͷΦϒδΣΫτ͚ͩඳը͠ɺ   ͦͷ֎෦ʹ͋ΔΦϒδΣΫτ͸શ෦ඳըΛ͠ͳ͍     ਲ਼ମͷܗ͸ઃఆͰมߋՄೳ     ϑϥελϜΧϦϯά͸   6OJUZଆͰσϑΥϧτͰ΍ͬͯ͘ΕΔʂ

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ΦΫϧʔδϣϯΧϦϯά ΦΫϧʔδϣϯΧϦϯά   Χϝϥ಺ʢਲ਼ମ಺෦ʣͷΦϒδΣΫτͷ͏ͪ   खલͷΦϒδΣΫτʹ׬શʹӅΕ͍ͯΔ΋ͷ͸   ඳը͠ͳ͍     ద༻ͯ͠΋ϓϨΠϠʔ͔Β͸ݟͨ໨ʹมԽ͸ͳ͍

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ΦΫϧʔδϣϯΧϦϯάద༻ޙ ॳظঢ়ଶʢϑϥελϜΧϦϯάͷΈʣ͔Β   ΦΫϧʔδϣϯΧϦϯάΛద༻   -0%͸ద༻͠ͳ͍   ΦΫϧʔδϣϯσʔλͱݺ͹ΕΔσʔλΛੜ੒͢Δࡍͷ   ύϥϝʔλ͸σϑΥϧτ ϙϦΰϯ਺͸   ສˠສʙສఔ౓ʹ "OESPJEGQTˠGQTʙGQT   J1IPOF9GQTʙGQTʹ   Χϝϥͷํ޲ʹΑͬͯඳը͞ΕΔΦϒδΣΫτͷ਺͕   มΘΔͨΊ͔ͳΓ͹Β͖ͭ͸͋Δ   (16ෛՙ͸ݮΔ͕ɺःṭ൑ఆܭࢉͰ$16ෛՙ͸૿͑Δ

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஫ҙ ύϑΥʔϚϯε͸͔֬ʹେࣄ͕ͩΞʔςΟετ͞Μͱͷ࿈ܞ΋ඞཁ   ˠΤϯδχΞ͕উखʹΦϒδΣΫτͷݟͨ໨ͷ඼࣭Λམͱ͍͍ͯ͠΋ͷͰ͸ͳ͍   ˠݟͨ໨ͱύϑΥʔϚϯεΛཱ྆Ͱ͖Δ͍͍Ԙകͷͱ͜ΖΛ୳͢

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·ͱΊ ৽ଔݚमͰ514Λ࡞ͬͨ ΤϯδχΞ໨ઢͰΦʔϓϯϫʔϧυ࣮૷࣌ʹ࢖͑Δٕज़Λ঺հ ࣮ࡍʹϑΟʔϧυΛ࡞੒͠ɺඳըͷෛՙ͕ܰݮ͞Εͨ͜ͱΛ֬ೝͨ͠

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͓·͚ɿΤϯδχΞͷੈք΋Φʔϓϯϫʔϧυ ֶशϧʔτ͕ଟ༷   ɾࠃՈࢼݧͳͲͷΑ͏ʹඞͣ௨Βͳ͚Ε͹͍͚ͳ͍ϙΠϯτ͸͋·Γͳ͍   ɾܾΊΒΕͨγφϦΦ͕ͳ͍͔ΒΈΜͳ͍࣋ͬͯΔٕज़͸༷ʑ ࣗΒΞΫγϣϯΛى͜͢΄Ͳੈք͕޿͕͍ͬͯ͘   ɾಡॻͰ஌ࣝ΍ٕज़Λशಘ   ɾେֶͷߨٛɾ࣮शɾ5"ɾ0"   ɾίϯϐϡʔλؔ܎ͷαʔΫϧɺίϛϡχςΟ׆ಈʢϦϞʔτͰ0,ʣ   ɾڝϓϩ   ɾ։ൃίϯϖʢϦϞʔτͰ0,ʣ   ɾػցֶशϋοΧιϯ   ɾਓPSগਓ਺νʔϜͰήʔϜɺΞϓϦͳͲΛ։ൃͯ͠ϦϦʔε   ͳͲͳͲʜ   ˠͪΐͬͱͨ͠ҰาͰʮ΍Γ͍ͨ͜ͱʯʮಌΕͷਓʯ͕ݟ͔ͭΔ͔΋   ˠίϩφՒͰ΋ϦϞʔτͷΠϕϯτʹੵۃతʹࢀՃ