implement/match CalcLocalTransform (#241)

* implement/match CalcLocalTransform

* fix odd build error

* address feedback

move vec.h to thirdparty folder
update vec.h
move all realtime code to realtime folder
move calclocaltransform out of legoutil and into realtime
cast shift to MxS32
add additional unroll hack to CalcLocalTransform to prevent msvc entropy

LEGO1/realtime/realtimeview.cpp

@@ -0,0 +1,46 @@
+#include "realtimeview.h"
+#include <math.h>
+
+// 0x10109598
+float g_userMaxLodPower;
+
+// 0x10101044
+float g_userMaxBase = 4.0f;
+
+// 0x10101048
+float g_userMaxLod = 3.6f;
+
+// 0x1010104c
+float g_partsThreshold = 1000.0f;
+
+// OFFSET: LEGO1 0x100a5e00
+float RealtimeView::GetUserMaxLOD()
+{
+  // TODO
+  return 0;
+}
+
+// OFFSET: LEGO1 0x100a5e10
+float RealtimeView::GetPartsThreshold()
+{
+  return g_partsThreshold;
+}
+
+// OFFSET: LEGO1 100a5e20
+void RealtimeView::UpdateMaxLOD()
+{
+  g_userMaxLodPower = pow(g_userMaxBase, -g_userMaxLod);
+}
+
+// OFFSET: LEGO1 0x100a5de0
+void RealtimeView::SetUserMaxLOD(float p_lod)
+{
+  g_userMaxLod = p_lod;
+  UpdateMaxLOD();
+}
+
+// OFFSET: LEGO1 0x100a5df0
+void RealtimeView::SetPartsThreshold(float p_threshold)
+{
+  g_partsThreshold = p_threshold;
+}