Match FUN_1006b140() and related functions (#1623)

* Match on BETA10

* Possible improvement on Matrix4::Swap

* Document entropy build result

* Comments at at Matrix4::Invert

---------

Co-authored-by: jonschz <jonschz@users.noreply.github.com>

LEGO1/lego/legoomni/include/legoanimpresenter.h

@@ -92,7 +92,11 @@ public:
 	const char* GetActionObjectName();
 
 	void SetCurrentWorld(LegoWorld* p_currentWorld) { m_currentWorld = p_currentWorld; }
+
+	// FUNCTION: BETA10 0x1005aad0
 	void SetUnknown0x0cTo1() { m_unk0x9c = 1; }
+
+	// FUNCTION: BETA10 0x1005ab00
 	void SetUnknown0xa0(Matrix4* p_unk0xa0) { m_unk0xa0 = p_unk0xa0; }
 
 	LegoAnim* GetAnimation() { return m_anim; }