From faeb281905e3b233cd1b85e642d9cbad7c7488f0 Mon Sep 17 00:00:00 2001
From: ragnarok-clanker <ragnarok-clanker>
Date: Thu, 29 Oct 2026 18:09:08 +0000
Subject: [PATCH] Decompile 2 functions in
 Source/Contents/Effects/EffectPrimitiveMotion.cpp,
 Source/Contents/Effects/EffectPrim.h

Batch #2618 by ragnarok-clanker: 0 byte-identical, 2 confirmed by peer review.

- fn_19950 CEffectPrim::PrimFrameScroll: logic confirmed by peer review
- fn_19962 CEffectPrim::PrimFramePhase: logic confirmed by peer review

Peer-reviewed-by: youko
Reviewed-by: ragnarok-clanker
---
 Source/Contents/Effects/EffectPrim.h          |  2 +
 .../Effects/EffectPrimitiveMotion.cpp         | 48 +++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/Source/Contents/Effects/EffectPrim.h b/Source/Contents/Effects/EffectPrim.h
index 16937996..e71c5c57 100644
--- a/Source/Contents/Effects/EffectPrim.h
+++ b/Source/Contents/Effects/EffectPrim.h
@@ -51,6 +51,8 @@ struct CEffectPrim : CRenderObject {
   bool PrimTwinSpin();
   void PrimFlashFade();
   bool PrimFadeAlpha();
+  void PrimFrameScroll();
+  void PrimFramePhase();
   void Render2DCircle();
   void RenderCrossPlanes(matrix& wtm);
   void RenderPyramid(matrix& wtm);
diff --git a/Source/Contents/Effects/EffectPrimitiveMotion.cpp b/Source/Contents/Effects/EffectPrimitiveMotion.cpp
index 47fa4b7a..81811c8f 100644
--- a/Source/Contents/Effects/EffectPrimitiveMotion.cpp
+++ b/Source/Contents/Effects/EffectPrimitiveMotion.cpp
@@ -4810,3 +4810,51 @@ bool CEffectPrim::PrimFadeAlpha() {
   this->ShiftSegment();
   return this->AnimMotion();
 }
+
+// OFFSET: 0x00BE92B0
+// FUNCTION: fn_19950
+void CEffectPrim::PrimFrameScroll() {
+  this->render.position = this->state.master->render.position;
+
+  for (int index = 0; index < 4; ++index) {
+    EffectPrimitiveSlot& slot = this->state.slots[index];
+
+    if (slot.life != 1 || ++slot.process <= 0) {
+      continue;
+    }
+
+    slot.height[1] += 1.0f;
+    if (slot.height[1] >= static_cast<float>(this->state.totalTexture)) {
+      slot.height[1] = 0.0f;
+    }
+
+    slot.distance -= 1.0f;
+    if (slot.distance < 0.0f) {
+      slot.distance += slot.maxHeight;
+    }
+  }
+}
+
+// OFFSET: 0x00BEA310
+// FUNCTION: fn_19962
+void CEffectPrim::PrimFramePhase() {
+  this->render.position = this->state.master->render.position;
+
+  for (int index = 0; index < 4; ++index) {
+    EffectPrimitiveSlot& slot = this->state.slots[index];
+
+    if (slot.life != 1 || ++slot.process <= 0) {
+      continue;
+    }
+
+    slot.height[1] += 1.0f;
+    if (slot.height[1] >= static_cast<float>(this->state.totalTexture)) {
+      slot.height[1] = 0.0f;
+    }
+
+    slot.height[9] = slot.height[2] + slot.height[9];
+    if (slot.height[9] >= 1.0f) {
+      slot.height[9] -= 1.0f;
+    }
+  }
+}