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SceneKitでふんわりした影を描画する/potatotips58
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noppefoxwolf
January 28, 2019
Programming
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SceneKitでふんわりした影を描画する/potatotips58
noppefoxwolf
January 28, 2019
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Transcript
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ϥΠϒ৴ΞϓϦ1PDPDIB IUUQTNFEJVNDPNQPDPDIBFOHJOFFSJOH
OPQQF !OPQQFGPYXPMG ! 1PDPDIBJ04ΤϯδχΞ " ͖ͭͶ͔Θ͍͍ # J04%$ͰඳըपΓͷΛͨ͠ $ ࠷ۙ"3ʹڵຯ͋Γ
ϥΠϒ৴ΞϓϦ
J04͔ΒVTE[Λαϙʔτ VTE["QQMFͱ1JYFSͰڞಉ։ൃͨ͠%ϑΝΠϧϑΥʔ Ϛοτ
'JMFͰϓϨϏϡʔ "3ஔՄೳ
'JMFͷϓϨϏϡʔͷ Өʹ
88%$Ͱ$POUBDU4IBEPXͱදݱ IUUQTEFWFMPQFSBQQMFDPNWJEFPTQMBZXXED UJNF
$POUBDU4IBEPXʢ ৮Өʣͱ ײɾॏͳΓײΛग़ͨ͢Ίͷ ͷ IUUQTUXJUUFSDPNVOSFBMFOHJOFKQTUBUVT
$POUBDU4IBEPXͬͯΈ͍ͨʂ
4DFOF,JUͰӨΛ͚ͭͯΈΔ w 4$/-JHIUͷDBTUT4IBEPXΛ0/ʹ͢Δ w EJSFDUJPOBM͔ɺTQPUλΠϓΛ͏ IUUQTEFWFMPQFSBQQMFDPNEPDVNFOUBUJPOTDFOFLJUTDOMJHIU DBTUTTIBEPX
// ΦϒδΣΫτ let scene = SCNScene(named: "stratocaster.scn")! // ϥΠτ let
light = SCNLight() light.type = .directional light.castsShadow = true let lightNode = SCNNode() lightNode.light = light // চ let floor = SCNFloor() ...
4$/-JHIUͰ͖ͬΓͨ͠Өʹ ͳͬͯ͠·͏ɻ
ҰԠ4IEBPX3BEJVT͋Δ͕ɺϘ Χ͠ํ͕ࡶ lightNode.light!.shadowRadius = 16 lightNode.light!.shadowSampleCount = 16
άά͍ͬͯΔͱɺήʔϜͷهࣄ͕ώοτ IUUQCMPHTJNPOSPESJHVF[GSBSUJDMFTBGFXTDOUFDIOJRVFFYBNQMFTIUNM
TDSFFOTQBDFBNCJFOUPDDMVTJPO ମ͕ۙͯ͠ڱ͘ͳͬͨͱ͜Ζ෦ͷ۱ͳͲʹɺपғͷޫʢڥ ޫʣ͕ःΒΕΔ͜ͱʹΑͬͯӨ͕ݱΕΔݱΛΞϯϏΤϯτɾΦΫ ϧʔδϣϯʢڥःṭڥด࠹ɺӳBNCJFOUPDDMVTJPOʣͱݺ Ϳɻ44"0%ը໘ͷϨϯμϦϯά݁ՌʹޙॲཧΛ͔͚ΔϙετΤ ϑΣΫτͷҰछͰ͋ΓɺٖࣅతͳϨϯμϦϯά݁ՌʹՃ͢ΔͷͰ ͋Δɻ IUUQTKBXJLJQFEJBPSHXJLJ44"0
44"0 camera?.screenSpaceAmbientOcclusionIntensity = 5 camera?.screenSpaceAmbientOcclusionNormalThreshold = 0.1 camera?.screenSpaceAmbientOcclusionDepthThreshold = 0.08
camera?.screenSpaceAmbientOcclusionBias = 0.33 camera?.screenSpaceAmbientOcclusionRadius = 3.0
໘Ҏ֎ͷՕॴͷӨ͋Δ
;ΜΘΓͨ͠ӨࣗલͰඳը͠ͳ͍ ͱμϝͦ͏
4$/5FDIOJRVF w ϚϧνύεϨϯμϦϯάͷͨΊͷΫϥε ը໘̍ճͷߋ৽ͷؒʹɺҟͳΔγʔϯΛෳճϨϯ μϦϯάͯ͠߹ͨ݁͠ՌΛදࣔ͢Δػೳɻ .FUBM0QFO(-&4ͰγΣʔμΛॻ͘ࣄ͕ग़དྷΔɻ ೖྗʹγʔϯͷ৭ใਂใ͕͑Δ
ͬͯΈͨ ΧϝϥΛೋͭஔͯ͠ɺԼ͔ΒͷೖྗΛਂʹม͠ ͯϒϥʔΛ͔͚Δɻ
IUUQCMPHTJNPOSPESJHVF[GSBSUJDMFTBGFXTDOUFDIOJRVFFYBNQMFTIUNM
Ө͚ͩ࡞ͬͯΈͨ w Α͘ΈΔͱϞΞϨʢࣶ༷ʣ ͕ʜ w ͦͦΧϝϥஔ͘ͷʜ w γΣʔμਅ໘ʹॻ͜͏ͱ͢Δ ͱαΫοͱग़དྷͳͦ͏
ସҊΛ୳͢
HPCP 4$/-JHIUͷӨΛࣗલͷը૾Ͱඳ ը͢Δػೳ ӨΛൃࣹ͢ΔϥΠτ ϦΞϧλΠϜͰߋ৽ग़དྷͳ͍
HPCP w 4$/5FDIOJRVFͰਂը૾ʹม w 4$/7JFXͷTOBQTIPUͰ6**NBHFΛऔಘ w $*'JMUFSͰϒϥʔΛ͔͚Δ w 4$/-JHIUͷHPCPʹը૾Ληοτ
݁Ռ
՝ w Өͷೱ୶ͳͲ·ͩ'JMFͷදݱʹୡ͍ͯ͠ͳ͍ w 4$/5FDIOJRVFͰશͯ݁ग़དྷΔ͔ w TIBEFS.PEJpFSTͰϥΠςΟϯάγΣʔμ͕࿔ΕΔ
͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ