1 files changed, 61 insertions, 0 deletions
diff --git a/game/server/ai_routedist.h b/game/server/ai_routedist.h
new file mode 100644
index 0000000..4820539
--- /dev/null
+++ b/game/server/ai_routedist.h
@@ -0,0 +1,61 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose:
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef AI_ROUTEDIST_H
+#define AI_ROUTEDIST_H
+
+#include "ai_navtype.h"
+
+#if defined( _WIN32 )
+#pragma once
+#endif
+
+// ----------------------------------------------------------------------------
+// Computes the route distance + route direction based on nav type
+// FIXME: Where should this go? 
+// ----------------------------------------------------------------------------
+inline float ComputePathDistance( Navigation_t navType, const Vector &start, const Vector &end )
+{
+	if (navType == NAV_GROUND)
+	{
+		return (end - start).Length2D();
+	}
+	else
+	{
+		return (end - start).Length();
+	}
+}
+
+inline void ComputePathVector( Navigation_t navType, const Vector &start, const Vector &end, Vector *pDelta )
+{
+	if (navType == NAV_GROUND)
+	{
+		Vector2DSubtract( end.AsVector2D(), start.AsVector2D(), pDelta->AsVector2D() );
+		pDelta->z = 0.0f;
+	}
+	else
+	{
+		VectorSubtract( end, start, *pDelta );
+	}
+}
+
+inline float ComputePathDirection( Navigation_t navType, const Vector &start, const Vector &end, Vector *pDirection )
+{
+	if (navType == NAV_GROUND)
+	{
+		VectorSubtract( end, start, *pDirection );
+		pDirection->z = 0.0f;
+		return Vector2DNormalize( pDirection->AsVector2D() );
+	}
+	else
+	{
+		VectorSubtract( end, start, *pDirection );
+		return VectorNormalize( *pDirection );
+	}
+}
+
+#endif // AI_ROUTEDIST_H