#pragma hdrstop
#include "precompiled.h"

#include "NAV_local.h"
#include "../Game_local.h"
#include "NAVCallback_FindAttackPosition.h"

/*
============
idNAVFindAttackPosition::idNAVFindAttackPosition
============
*/
idNAVFindAttackPosition::idNAVFindAttackPosition(const idAI* self, const idMat3& gravityAxis, idEntity* target, const idVec3& targetPos, const idVec3& fireOffset) {
	int	numPVSAreas;

	this->target = target;
	this->targetPos = targetPos;
	this->fireOffset = fireOffset;
	this->self = self;
	this->gravityAxis = gravityAxis;

	excludeBounds = idBounds(idVec3(-64.0, -64.0f, -8.0f), idVec3(64.0, 64.0f, 64.0f));
	excludeBounds.TranslateSelf(self->GetPhysics()->GetOrigin());

	// setup PVS
	idBounds bounds(targetPos - idVec3(16, 16, 0), targetPos + idVec3(16, 16, 64));
	numPVSAreas = gameLocal.pvs.GetPVSAreas(bounds, PVSAreas, idEntity::MAX_PVS_AREAS);
	targetPVS = gameLocal.pvs.SetupCurrentPVS(PVSAreas, numPVSAreas);
}

/*
============
idNAVFindAttackPosition::~idNAVFindAttackPosition
============
*/
idNAVFindAttackPosition::~idNAVFindAttackPosition() {
	gameLocal.pvs.FreeCurrentPVS(targetPVS);
}

/*
============
idNAVFindAttackPosition::TestArea
============
*/
bool idNAVFindAttackPosition::AreaIsGoal(const idNAV* aas, int areaNum) {
	idVec3	dir;
	idVec3	local_dir;
	idVec3	fromPos;
	idMat3	axis;
	idVec3	areaCenter;
	int		numPVSAreas;
	int		PVSAreas[idEntity::MAX_PVS_AREAS];

	areaCenter = aas->AreaCenter(areaNum);
	areaCenter[2] += 1.0f;

	if (excludeBounds.ContainsPoint(areaCenter)) {
		// too close to where we already are
		return false;
	}

	numPVSAreas = gameLocal.pvs.GetPVSAreas(idBounds(areaCenter).Expand(16.0f), PVSAreas, idEntity::MAX_PVS_AREAS);
	if (!gameLocal.pvs.InCurrentPVS(targetPVS, PVSAreas, numPVSAreas)) {
		return false;
	}

	// calculate the world transform of the launch position
	dir = targetPos - areaCenter;
	gravityAxis.ProjectVector(dir, local_dir);
	local_dir.z = 0.0f;
	local_dir.ToVec2().Normalize();
	axis = local_dir.ToMat3();
	fromPos = areaCenter + fireOffset * axis;

	return self->GetAimDir(fromPos, target, self, dir);
}