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71 lines
2.0 KiB
C++
71 lines
2.0 KiB
C++
#ifndef OPENMW_MECHANICS_OBSTACLE_H
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#define OPENMW_MECHANICS_OBSTACLE_H
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namespace MWWorld
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{
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class Ptr;
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}
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namespace MWMechanics
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{
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struct Movement;
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/// NOTE: determined empirically based on in-game behaviour
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static const float MIN_DIST_TO_DOOR_SQUARED = 128*128;
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static const int NUM_EVADE_DIRECTIONS = 4;
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/// tests actor's proximity to a closed door by default
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bool proximityToDoor(const MWWorld::Ptr& actor,
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float minSqr = MIN_DIST_TO_DOOR_SQUARED);
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/// Returns door pointer within range. No guarentee is given as too which one
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/** \return Pointer to the door, or NULL if none exists **/
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MWWorld::Ptr getNearbyDoor(const MWWorld::Ptr& actor,
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float minSqr = MIN_DIST_TO_DOOR_SQUARED);
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class ObstacleCheck
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{
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public:
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ObstacleCheck();
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// Clear the timers and set the state machine to default
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void clear();
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bool isNormalState() const;
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// Returns true if there is an obstacle and an evasive action
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// should be taken
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bool check(const MWWorld::Ptr& actor, float duration);
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// change direction to try to fix "stuck" actor
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void takeEvasiveAction(MWMechanics::Movement& actorMovement);
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private:
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// for checking if we're stuck (ignoring Z axis)
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float mPrevX;
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float mPrevY;
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// directions to try moving in when get stuck
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static const float evadeDirections[NUM_EVADE_DIRECTIONS][2];
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enum WalkState
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{
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State_Norm,
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State_CheckStuck,
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State_Evade
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};
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WalkState mWalkState;
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float mStuckDuration; // accumulate time here while in same spot
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float mEvadeDuration;
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float mDistSameSpot; // take account of actor's speed
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int mEvadeDirectionIndex;
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void chooseEvasionDirection();
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};
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}
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#endif
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