From 191913568220e659eb4c1c3c6d8fdd210c5594f0 Mon Sep 17 00:00:00 2001
From: Christian Semmler <mail@csemmler.com>
Date: Fri, 20 Oct 2023 09:23:04 -0400
Subject: [PATCH] Implement remaining functions

---
 LEGO1/mxregion.cpp | 57 ++++++++++++++++++++++++++++++++++++++--------
 LEGO1/mxregion.h   |  3 ++-
 2 files changed, 49 insertions(+), 11 deletions(-)

diff --git a/LEGO1/mxregion.cpp b/LEGO1/mxregion.cpp
index e95f7cf3..b15f310e 100644
--- a/LEGO1/mxregion.cpp
+++ b/LEGO1/mxregion.cpp
@@ -14,23 +14,25 @@ MxRegion::MxRegion()
   m_rect.SetSize(MxSize32(-1, -1));
 }
 
-// OFFSET: LEGO1 0x100c3660 STUB
+// OFFSET: LEGO1 0x100c3660
 MxBool MxRegion::vtable20()
 {
-  // TODO
-  return FALSE;
+  return m_list->GetCount() == 0;
 }
 
-// OFFSET: LEGO1 0x100c3690 STUB
+// OFFSET: LEGO1 0x100c3690
 MxRegion::~MxRegion()
 {
-  // TODO
+  if (m_list)
+    delete m_list;
 }
 
-// OFFSET: LEGO1 0x100c3700 STUB
+// OFFSET: LEGO1 0x100c3700
 void MxRegion::Reset()
 {
-  // TODO
+  m_list->DeleteAll();
+  m_rect.SetPoint(MxPoint32(INT_MAX, INT_MAX));
+  m_rect.SetSize(MxSize32(-1, -1));
 }
 
 // OFFSET: LEGO1 0x100c3750
@@ -100,10 +102,29 @@ void MxRegion::vtable18(MxRect32 &p_rect)
   m_rect.m_bottom = m_rect.m_bottom <= p_rect.m_bottom ? p_rect.m_bottom : m_rect.m_bottom;
 }
 
-// OFFSET: LEGO1 0x100c3e20 STUB
-void MxRegion::vtable1c()
+// OFFSET: LEGO1 0x100c3e20
+MxBool MxRegion::vtable1c(MxRect32 &p_rect)
 {
-  // TODO
+  if (m_rect.m_left < p_rect.m_right &&
+      p_rect.m_left < m_rect.m_right &&
+      (m_rect.m_top < p_rect.m_bottom &&
+       p_rect.m_top < m_rect.m_bottom)) {
+    MxRegionListCursor cursor(m_list);
+    MxRegionTopBottom *topBottom;
+  
+    do {
+      do {
+        if (!cursor.Next(topBottom))
+          return FALSE;
+        if (topBottom->m_top >= p_rect.m_bottom)
+          return FALSE;
+      } while (topBottom->m_bottom <= p_rect.m_top);
+    } while (!topBottom->FUN_100c57b0(p_rect));
+
+    return TRUE;
+  }
+
+  return FALSE;
 }
 
 // OFFSET: LEGO1 0x100c4c90
@@ -186,4 +207,20 @@ MxRegionTopBottom *MxRegionTopBottom::Clone()
     clone->m_leftRightList->Append(leftRight->Clone());
 
   return clone;
+}
+
+// OFFSET: LEGO1 0x100c57b0
+MxBool MxRegionTopBottom::FUN_100c57b0(MxRect32 &p_rect)
+{
+  MxRegionLeftRightListCursor cursor(m_leftRightList);
+  MxRegionLeftRight *leftRight;
+
+  do {
+    if (!cursor.Next(leftRight))
+      return FALSE;
+    if (p_rect.m_right <= leftRight->m_left)
+      return FALSE;
+  } while (leftRight->m_right <= p_rect.m_left);
+
+  return TRUE;
 }
\ No newline at end of file
diff --git a/LEGO1/mxregion.h b/LEGO1/mxregion.h
index 1c7a0716..0b1ef186 100644
--- a/LEGO1/mxregion.h
+++ b/LEGO1/mxregion.h
@@ -14,6 +14,7 @@ struct MxRegionTopBottom
 
   MxRegionTopBottom *Clone();
   void FUN_100c5280(MxS32 p_left, MxS32 p_right);
+  MxBool FUN_100c57b0(MxRect32 &p_rect);
 
   MxS32 m_top;
   MxS32 m_bottom;
@@ -48,7 +49,7 @@ public:
 
   virtual void Reset();
   virtual void vtable18(MxRect32 &p_rect);
-  virtual void vtable1c();
+  virtual MxBool vtable1c(MxRect32 &p_rect);
   virtual MxBool vtable20();
 
   inline MxRect32 &GetRect() { return this->m_rect; }