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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef PATH_CONTROLLER_H
#define PATH_CONTROLLER_H
#include "System/float3.h"
class CUnit;
class CFeature;
struct MoveDef;
// provides control inputs for a ground-unit following a path
//
// inputs are not required to obey a unit's "physical" limits
// (but doing so is a good idea because they are NOT clamped
// before being applied)
//
// TODO: for crowds, track units with the same move order
class IPathController {
public:
static IPathController* GetInstance(CUnit* owner);
static void FreeInstance(IPathController* instance);
// if a unit has a path to follow (and is not stunned,
// being built, etc) this gets called every sim-frame
virtual float GetDeltaSpeed(
unsigned int pathID,
float targetSpeed, // max. speed <owner> is ALLOWED to be moving at
float currentSpeed, // speed <owner> is currently moving at
float maxAccRate,
float maxDecRate,
bool wantReverse,
bool isReversing
) const = 0;
// if a unit has a path to follow (and is not stunned,
// being built, etc) this gets called every sim-frame
#if 1
virtual short GetDeltaHeading(
unsigned int pathID,
short newHeading,
short oldHeading,
float maxTurnRate
) const = 0;
#endif
virtual short GetDeltaHeading(
unsigned int pathID,
short newHeading,
short oldHeading,
float maxTurnSpeed,
float maxTurnAccel,
float turnBrakeDist,
float* curTurnSpeed
) const = 0;
virtual bool AllowSetTempGoalPosition(unsigned int pathID, const float3& pos) const = 0;
virtual void SetTempGoalPosition(unsigned int pathID, const float3& pos) = 0;
virtual void SetRealGoalPosition(unsigned int pathID, const float3& pos) = 0;
virtual bool IgnoreTerrain(const MoveDef& md, const float3& pos) const = 0;
// if these return true, the respective collisions are NOT handled
virtual bool IgnoreCollision(const CUnit* collider, const CUnit* collidee) const = 0;
virtual bool IgnoreCollision(const CUnit* collider, const CFeature* collidee) const = 0;
protected:
IPathController(CUnit* owner_): owner(owner_) {}
virtual ~IPathController() {}
CUnit* owner;
};
class GMTDefaultPathController: public IPathController {
public:
GMTDefaultPathController(CUnit* owner_): IPathController(owner_) {}
float GetDeltaSpeed(
unsigned int pathID,
float targetSpeed,
float currentSpeed,
float maxAccRate,
float maxDecRate,
bool wantReverse,
bool isReversing
) const;
#if 1
short GetDeltaHeading(
unsigned int pathID,
short newHeading,
short oldHeading,
float maxTurnRate
) const;
#endif
short GetDeltaHeading(
unsigned int pathID,
short newHeading,
short oldHeading,
float maxTurnSpeed,
float maxTurnAccel,
float turnBrakeDist,
float* curTurnSpeed
) const;
bool AllowSetTempGoalPosition(unsigned int pathID, const float3& pos) const { return true; }
void SetTempGoalPosition(unsigned int pathID, const float3& pos) { realGoalPos = pos; }
void SetRealGoalPosition(unsigned int pathID, const float3& pos) { tempGoalPos = pos; }
bool IgnoreTerrain(const MoveDef& md, const float3& pos) const;
bool IgnoreCollision(const CUnit* collider, const CUnit* collidee) const { return false; }
bool IgnoreCollision(const CUnit* collider, const CFeature* collidee) const { return false; }
private:
float3 realGoalPos; // where <owner> ultimately wants to go (its final waypoint)
float3 tempGoalPos; // where <owner> currently wants to go (its next waypoint)
};
#endif
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