Library/MapObj: Implement BackHideParts, BackHideDitherAnimator (#202)

data/odyssey_functions.csv

@@ -7385,8 +7385,8 @@ Address,Quality,Size,Name
 0x000000710012de7c,U,000036,_ZN13ImomuFunction29invalidateDepthShadowMapImomuEPN2al9LiveActorE
 0x000000710012dea0,U,000112,_ZN13ImomuFunction16setVelocityZeroHEPN2al9LiveActorE
 0x000000710012df10,U,000036,_ZN19ImomuDitherAnimatorD0Ev
-0x000000710012df34,U,000004,_ZN2al14DitherAnimator4showEv
-0x000000710012df38,U,000008,_ZNK2al14DitherAnimator15isValidNearClipEv
+0x000000710012df34,O,000004,_ZN2al14DitherAnimator4showEv
+0x000000710012df38,O,000008,_ZNK2al14DitherAnimator15isValidNearClipEv
 0x000000710012df40,U,000012,_ZNK26ImomuJointMtxControllerTmp15getCtrlTypeNameEv
 0x000000710012df4c,U,000164,
 0x000000710012dff0,U,000204,_ZN5JangoC2EPKc
@@ -30453,7 +30453,7 @@ Address,Quality,Size,Name
 0x00000071004bcd3c,U,000052,_ZN2al19createActorFunctionI8FastenerEEPNS_9LiveActorEPKc
 0x00000071004bcd70,U,000052,_ZN2al19createActorFunctionI11FastenerObjEEPNS_9LiveActorEPKc
 0x00000071004bcda4,U,000052,_ZN2al19createActorFunctionINS_21AtmosScatterRequesterEEEPNS_9LiveActorEPKc
-0x00000071004bcdd8,U,000052,_ZN2al19createActorFunctionINS_13BackHidePartsEEEPNS_9LiveActorEPKc
+0x00000071004bcdd8,O,000052,_ZN2al19createActorFunctionINS_13BackHidePartsEEEPNS_9LiveActorEPKc
 0x00000071004bce0c,U,000052,_ZN2al19createActorFunctionI17CapRotateMapPartsEEPNS_9LiveActorEPKc
 0x00000071004bce40,U,000052,_ZN2al19createActorFunctionINS_13ClockMapPartsEEEPNS_9LiveActorEPKc
 0x00000071004bce74,U,000052,_ZN2al19createActorFunctionINS_16ConveyerMapPartsEEEPNS_9LiveActorEPKc
@@ -58139,12 +58139,12 @@ Address,Quality,Size,Name
 0x0000007100910910,O,000096,_ZN2al14LiveActorGroup7killAllEv
 0x0000007100910970,O,000080,_ZN2al14LiveActorGroup17makeActorAliveAllEv
 0x00000071009109c0,O,000080,_ZN2al14LiveActorGroup16makeActorDeadAllEv
-0x0000007100910a10,U,000064,_ZN2al22BackHideDitherAnimatorC1EPNS_9LiveActorE
-0x0000007100910a50,U,000360,_ZN2al22BackHideDitherAnimator6updateEv
-0x0000007100910bb8,U,000124,_ZN2al13BackHidePartsC2EPKc
-0x0000007100910c34,U,000136,_ZN2al13BackHidePartsC1EPKc
-0x0000007100910cbc,U,000144,_ZN2al13BackHideParts4initERKNS_13ActorInitInfoE
-0x0000007100910d4c,U,000036,_ZN2al22BackHideDitherAnimatorD0Ev
+0x0000007100910a10,O,000064,_ZN2al22BackHideDitherAnimatorC1EPNS_9LiveActorE
+0x0000007100910a50,O,000360,_ZN2al22BackHideDitherAnimator6updateEv
+0x0000007100910bb8,O,000124,_ZN2al13BackHidePartsC2EPKc
+0x0000007100910c34,O,000136,_ZN2al13BackHidePartsC1EPKc
+0x0000007100910cbc,m,000144,_ZN2al13BackHideParts4initERKNS_13ActorInitInfoE
+0x0000007100910d4c,O,000036,_ZN2al22BackHideDitherAnimatorD0Ev
 0x0000007100910d70,O,000140,_ZN2al17BreakMapPartsBaseC2EPKc
 0x0000007100910dfc,O,000152,_ZN2al17BreakMapPartsBaseC1EPKc
 0x0000007100910e94,O,000464,_ZN2al17BreakMapPartsBase4initERKNS_13ActorInitInfoE

lib/al/Library/Anim/DitherAnimator.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include "Library/Nerve/NerveExecutor.h"
+
+namespace al {
+class LiveActor;
+
+class DitherAnimator : public NerveExecutor {
+public:
+    DitherAnimator(const char* name) : NerveExecutor(name) {}
+
+    virtual void update() = 0;
+
+    virtual void show() {}
+
+    virtual bool isValidNearClip() const { return false; }
+};
+}  // namespace al

lib/al/Library/MapObj/BackHideParts.cpp

@@ -0,0 +1,54 @@
+#include "Library/MapObj/BackHideParts.h"
+
+#include "Library/Camera/CameraUtil.h"
+#include "Library/LiveActor/ActorInitFunction.h"
+#include "Library/LiveActor/ActorModelFunction.h"
+#include "Library/LiveActor/ActorPoseKeeper.h"
+#include "Library/Math/MathAngleUtil.h"
+#include "Library/Math/MathLengthUtil.h"
+#include "Library/Math/MathUtil.h"
+#include "Library/Model/ModelKeeper.h"
+#include "Library/Placement/PlacementFunction.h"
+
+namespace al {
+BackHideDitherAnimator::BackHideDitherAnimator(LiveActor* actor)
+    : DitherAnimator("背面ディザアニメーター"), mActor(actor) {}
+
+void BackHideDitherAnimator::update() {
+    sead::Vector3f cameraFront;
+    calcCameraFront(&cameraFront, mActor, 0);
+
+    f32 cameraOffset = (getCameraPos(mActor, 0) - getTrans(mActor)).length();
+
+    sead::Vector3f actorFront;
+    calcFrontDir(&actorFront, mActor);
+
+    f32 angleDegree = normalize(calcAngleDegree(cameraFront, actorFront), 60.0f, 90.0f);
+    cameraOffset = normalize(cameraOffset, 10000.0f, 12000.0f);
+
+    f32 actorAlpha = sead::Mathf::clamp(lerpValue(angleDegree, 1.0f, cameraOffset), 0.0f, 1.0f);
+    setModelAlphaMask(mActor, actorAlpha);
+
+    if (isNearZero(actorAlpha, 0.001)) {
+        hideModelIfShow(mActor);
+
+        return;
+    }
+
+    showModelIfHide(mActor);
+}
+
+BackHideParts::BackHideParts(const char* name) : LiveActor(name) {}
+
+// NON_MATCHING: regswap (https://decomp.me/scratch/j5tRy)
+void BackHideParts::init(const ActorInitInfo& info) {
+    const char* suffix = nullptr;
+    tryGetStringArg(&suffix, info, "Suffix");
+    initMapPartsActor(this, info, suffix);
+
+    mBackHideDitherAnimator = new BackHideDitherAnimator(this);
+    getModelKeeper()->setDitherAnimator(mBackHideDitherAnimator);
+
+    trySyncStageSwitchAppearAndKill(this);
+}
+}  // namespace al

lib/al/Library/MapObj/BackHideParts.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include "Library/Anim/DitherAnimator.h"
+#include "Library/LiveActor/LiveActor.h"
+
+namespace al {
+class BackHideDitherAnimator : public DitherAnimator {
+public:
+    BackHideDitherAnimator(LiveActor* actor);
+
+    void update() override;
+
+private:
+    LiveActor* mActor;
+};
+
+class BackHideParts : public LiveActor {
+public:
+    BackHideParts(const char* name);
+
+    void init(const ActorInitInfo& info) override;
+
+private:
+    BackHideDitherAnimator* mBackHideDitherAnimator = nullptr;
+};
+}  // namespace al

lib/al/Library/Model/ModelKeeper.h

@@ -12,6 +12,7 @@ class AnimPlayerSimple;
 class AnimPlayerSkl;
 class AnimPlayerVis;
 class ModelCtrl;
+class DitherAnimator;
 
 class ModelKeeper : public HioNode {
 public:
@@ -22,6 +23,7 @@ public:
     void calc(const sead::Matrix34f&, const sead::Vector3f&);
     void initResource();
     void createMatAnimForProgram(s32);
+    void setDitherAnimator(DitherAnimator* ditherAnimator);
 
     ModelCtrl* getModelCtrl() const { return mModelCtrl; }
 

src/Scene/ProjectActorFactory.cpp

@@ -2,6 +2,7 @@
 
 #include "Library/Factory/Factory.h"
 #include "Library/LiveActor/CreateActorFunction.h"
+#include "Library/MapObj/BackHideParts.h"
 #include "Library/MapObj/FallMapParts.h"
 #include "Library/MapObj/FixMapParts.h"
 #include "Library/MapObj/FloaterMapParts.h"
@@ -550,7 +551,7 @@ static al::NameToCreator<al::ActorCreatorFunction> sProjectActorFactoryEntries[]
     {"Fastener", nullptr},
     {"FastenerObj", nullptr},
     {"AtmosScatterRequester", nullptr},
-    {"BackHideParts", nullptr},
+    {"BackHideParts", al::createActorFunction<al::BackHideParts>},
     {"BreakMapParts", nullptr},
     {"CapRotateMapParts", nullptr},
     {"ClockMapParts", nullptr},