Implement/match ObscureVantage0x58::VTable0x18 (isledecomp#203)

Author: foxtacles

LEGORacers/include/obscurevantage0x58.h

@@ -28,7 +28,7 @@ class ObscureVantage0x58 {
 	virtual void VTable0x0c(ObscureVantage0x58*);                                         // vtable+0x0c
 	virtual void VTable0x10(undefined4);                                                  // vtable+0x10
 	virtual void VTable0x14(undefined4);                                                  // vtable+0x14
-	virtual void VTable0x18(undefined4);                                                  // vtable+0x18
+	virtual undefined4 VTable0x18(undefined4);                                            // vtable+0x18
 	virtual undefined4 VTable0x1c(SilverDune0x30::Rect*, SilverDune0x30::Rect*);          // vtable+0x1c
 	virtual undefined4 VTable0x20(void*, undefined4, undefined4);                         // vtable+0x20
 	virtual undefined4 VTable0x24(OnyxCircularBuffer0x1c::Item*, undefined4, undefined4); // vtable+0x24

LEGORacers/src/obscurevantage0x58.cpp

@@ -199,11 +199,23 @@ void ObscureVantage0x58::FUN_004731b0(undefined4& p_param1, undefined4& p_param2
 	p_param2 -= m_unk0x34.m_unk0x04;
 }
 
-// STUB: LEGORACERS 0x004731d0
-void ObscureVantage0x58::VTable0x18(undefined4)
+// FUNCTION: LEGORACERS 0x004731d0
+undefined4 ObscureVantage0x58::VTable0x18(undefined4 p_unk0x04)
 {
-	// TODO
-	STUB(0x004731d0);
+	ObscureVantage0x58* child = m_unk0x08;
+	if (VTable0x3c(p_unk0x04)) {
+		return TRUE;
+	}
+
+	while (child) {
+		if (child->VTable0x18(p_unk0x04)) {
+			return TRUE;
+		}
+
+		child = child->m_unk0x14;
+	}
+
+	return FALSE;
 }
 
 // STUB: LEGORACERS 0x00473210