diff --git a/Source/Contents/ActorGeometry.cpp b/Source/Contents/ActorGeometry.cpp
new file mode 100644
index 0000000..dd7717a
--- /dev/null
+++ b/Source/Contents/ActorGeometry.cpp
@@ -0,0 +1,54 @@
+#include "Contents/Actors/RenderObject.h"
+#include "Utility/Math/AffineMatrix.h"
+
+#include <cmath>
+
+// FUNCTION: fn_21007
+float __stdcall CRenderObject::Heading(float x, float z, float targetX, float targetZ) {
+  const float deltaX = targetX - x;
+  const float deltaZ = targetZ - z;
+  float angle = (static_cast<float>(std::atan2(static_cast<double>(deltaX), static_cast<double>(-deltaZ))) / 3.141592f) * 180.0f;
+  if (angle >= 360.0f) {
+    angle -= 360.0f;
+  }
+
+  if (angle < 0.0f) {
+    angle += 360.0f;
+  }
+
+  return angle;
+}
+
+// FUNCTION: fn_21008
+void CRenderObject::Face(float x, float z) {
+  const float deltaX = x - this->render.position[0];
+  const float deltaZ = z - this->render.position[2];
+  if (deltaX != 0.0f || deltaZ != 0.0f) {
+    float angle = (static_cast<float>(std::atan2(static_cast<double>(deltaX), static_cast<double>(-deltaZ))) / 3.141592f) * 180.0f;
+    this->render.angle = angle;
+    if (angle >= 360.0f) {
+      angle -= 360.0f;
+      this->render.angle = angle;
+    }
+
+    if (angle < 0.0f) {
+      this->render.angle = angle + 360.0f;
+    }
+  }
+}
+
+// FUNCTION: fn_21009
+float CRenderObject::HorizontalDistance(float x, float z) const {
+  const float deltaX = x - this->render.position[0];
+  const float deltaZ = z - this->render.position[2];
+  return SquareRoot(deltaZ * deltaZ + deltaX * deltaX);
+}
+
+// FUNCTION: fn_21010
+float CRenderObject::Distance(float x, float y, float z) const {
+  const float deltaX = x - this->render.position[0];
+  const float deltaZ = z - this->render.position[2];
+  const float deltaY = y - this->render.position[1];
+  const float horizontal = SquareRoot(deltaZ * deltaZ + deltaX * deltaX);
+  return SquareRoot(horizontal * horizontal + deltaY * deltaY);
+}
diff --git a/Source/Contents/Actors/RenderObject.h b/Source/Contents/Actors/RenderObject.h
index 69ec0e5..604a97a 100644
--- a/Source/Contents/Actors/RenderObject.h
+++ b/Source/Contents/Actors/RenderObject.h
@@ -14,6 +14,10 @@ public:
   virtual void SetScreenBounds(const float* bounds, float x, float y);
 
   virtual void SetScreenPosition(float x, float y);
+  static float __stdcall Heading(float x, float z, float targetX, float targetZ);
+  void Face(float x, float z);
+  float HorizontalDistance(float x, float z) const;
+  float Distance(float x, float y, float z) const;
 
   RenderObjectState render;
 };
diff --git a/Source/Utility/Math/AffineMatrix.h b/Source/Utility/Math/AffineMatrix.h
index d517784..44c2641 100644
--- a/Source/Utility/Math/AffineMatrix.h
+++ b/Source/Utility/Math/AffineMatrix.h
@@ -8,6 +8,7 @@ float ClientCos(float radians);
 float ClientRadians(int degrees);
 float ClientSine(int degrees);
 float ClientCosine(int degrees);
+float SquareRoot(float value);
 
 struct AffineMatrix {
   float values[12];
diff --git a/compile.json b/compile.json
index 83df415..4aac58b 100644
--- a/compile.json
+++ b/compile.json
@@ -239,6 +239,7 @@
   "Source/Client/Registry.cpp": 0,
   "Source/Client/ReplayPacketRecorder.cpp": 2,
   "Source/Client/Session.cpp": 0,
+  "Source/Contents/ActorGeometry.cpp": 4,
   "Source/Contents/ActorNameCard.cpp": 4,
   "Source/Contents/ActorNameDirectory.cpp": 4,
   "Source/Contents/Actors/AttackMotion.cpp": 4,