//========= 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