DoomRTX/neo/doom3/game/ai/NAV.cpp

/*
===========================================================================

IceTech GPL Source Code
Copyright (C) 2026 Justin Marshall 

This file is part of the IceTech GPL Source Code (?IceTech Source Code?).  

IceTech Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

IceTech Source Code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with IceTech Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the IceTech Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the IceTech Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing Justin Marshall, justinmarshall20@gmail.com

===========================================================================
*/

#include "precompiled.h"
#pragma hdrstop

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

/*
============
idNAV::Alloc
============
*/
idNAV *idNAV::Alloc( void ) {
	return new idNAVLocal;
}

/*
============
idNAV::~idNAV
============
*/
idNAV::~idNAV( void ) {
}

/*
============
idNAVLocal::idNAVLocal
============
*/
idNAVLocal::idNAVLocal( void ) {
	file = NULL;
}

/*
============
idNAVLocal::~idNAVLocal
============
*/
idNAVLocal::~idNAVLocal( void ) {
	Shutdown();
}

/*
============
idNAVLocal::Init
============
*/
bool idNAVLocal::Init( const idStr &mapName, unsigned int mapFileCRC ) {
	const idStr navName = idRecastNavMesh::NavFileNameForMapName( mapName );
	if ( recastNavMesh.IsLoaded() && mapName.Icmp( name ) == 0 ) {
		common->Printf( "Keeping %s\n", navName.c_str() );
		recastNavMesh.RemoveAllObstacles();
		return true;
	}

	if ( recastNavMesh.Load( mapName, navName, mapFileCRC ) ) {
		if ( file ) {
			for ( int i = 0; i < obstacleList.Num(); i++ ) {
				delete obstacleList[i];
			}
			obstacleList.Clear();
			ShutdownRouting();
			AASFileManager->FreeAAS( file );
			file = NULL;
		}
		name = mapName;
		common->Printf( "Loaded Recast navmesh: %s\n", navName.c_str() );
		return true;
	}

	if ( file && mapName.Icmp( file->GetName() ) == 0 && mapFileCRC == file->GetCRC() ) {
		common->Printf( "Keeping %s\n", file->GetName() );
		RemoveAllObstacles();
	}
	else {
		Shutdown();

		file = AASFileManager->LoadAAS( mapName, mapFileCRC );
		if ( !file ) {
			common->DWarning( "Couldn't load NAV file: '%s'", mapName.c_str() );
			return false;
		}
		SetupRouting();
	}
	return true;
}

/*
============
idNAVLocal::Shutdown
============
*/
void idNAVLocal::Shutdown( void ) {
	recastNavMesh.Shutdown();
	if ( file ) {
		ShutdownRouting();
		RemoveAllObstacles();
		AASFileManager->FreeAAS( file );
		file = NULL;
	}
}

/*
============
idNAVLocal::Stats
============
*/
void idNAVLocal::Stats( void ) const {
	if ( recastNavMesh.IsLoaded() ) {
		recastNavMesh.Stats();
		return;
	}
	if ( !file ) {
		return;
	}
	common->Printf( "[%s]\n", file->GetName() );
	file->PrintInfo();
	RoutingStats();
}

/*
============
idNAVLocal::GetSettings
============
*/
const idAASSettings *idNAVLocal::GetSettings( void ) const {
	if ( recastNavMesh.IsLoaded() ) {
		return recastNavMesh.GetSettings();
	}
	if ( !file ) {
		return NULL;
	}
	return &file->GetSettings();
}

/*
============
idNAVLocal::PointAreaNum
============
*/
int idNAVLocal::PointAreaNum( const idVec3 &origin ) const {
	if ( recastNavMesh.IsLoaded() ) {
		return recastNavMesh.PointAreaNum( origin );
	}
	if ( !file ) {
		return 0;
	}
	return file->PointAreaNum( origin );
}

/*
============
idNAVLocal::PointReachableAreaNum
============
*/
int idNAVLocal::PointReachableAreaNum( const idVec3 &origin, const idBounds &searchBounds, const int areaFlags ) const {
	if ( recastNavMesh.IsLoaded() ) {
		return recastNavMesh.PointReachableAreaNum( origin, searchBounds, areaFlags );
	}
	if ( !file ) {
		return 0;
	}

	return file->PointReachableAreaNum( origin, searchBounds, areaFlags, TFL_INVALID );
}

/*
============
idNAVLocal::BoundsReachableAreaNum
============
*/
int idNAVLocal::BoundsReachableAreaNum( const idBounds &bounds, const int areaFlags ) const {
	if ( recastNavMesh.IsLoaded() ) {
		return recastNavMesh.BoundsReachableAreaNum( bounds, areaFlags );
	}
	if ( !file ) {
		return 0;
	}
	
	return file->BoundsReachableAreaNum( bounds, areaFlags, TFL_INVALID );
}

/*
============
idNAVLocal::PushPointIntoAreaNum
============
*/
void idNAVLocal::PushPointIntoAreaNum( int areaNum, idVec3 &origin ) const {
	if ( recastNavMesh.IsLoaded() ) {
		recastNavMesh.PushPointIntoAreaNum( areaNum, origin );
		return;
	}
	if ( !file ) {
		return;
	}
	file->PushPointIntoAreaNum( areaNum, origin );
}

/*
============
idNAVLocal::AreaCenter
============
*/
idVec3 idNAVLocal::AreaCenter( int areaNum ) const {
	if ( recastNavMesh.IsLoaded() ) {
		return recastNavMesh.AreaCenter( areaNum );
	}
	if ( !file ) {
		return vec3_origin;
	}
	return file->GetArea( areaNum ).center;
}

/*
============
idNAVLocal::AreaFlags
============
*/
int idNAVLocal::AreaFlags( int areaNum ) const {
	if ( recastNavMesh.IsLoaded() ) {
		return recastNavMesh.AreaFlags( areaNum );
	}
	if ( !file ) {
		return 0;
	}
	return file->GetArea( areaNum ).flags;
}

/*
============
idNAVLocal::AreaTravelFlags
============
*/
int idNAVLocal::AreaTravelFlags( int areaNum ) const {
	if ( recastNavMesh.IsLoaded() ) {
		return recastNavMesh.AreaTravelFlags( areaNum );
	}
	if ( !file ) {
		return 0;
	}
	return file->GetArea( areaNum ).travelFlags;
}

/*
============
idNAVLocal::Trace
============
*/
bool idNAVLocal::Trace( aasTrace_t &trace, const idVec3 &start, const idVec3 &end ) const {
	if ( recastNavMesh.IsLoaded() ) {
		return recastNavMesh.Trace( trace, start, end );
	}
	if ( !file ) {
		trace.fraction = 0.0f;
		trace.lastAreaNum = 0;
		trace.numAreas = 0;
		return true;
	}
	return file->Trace( trace, start, end );
}

/*
============
idNAVLocal::GetPlane
============
*/
const idPlane &idNAVLocal::GetPlane( int planeNum ) const {
	if ( !file ) {
		static idPlane dummy;
		return dummy;
	}
	return file->GetPlane( planeNum );
}

/*
============
idNAVLocal::GetEdgeVertexNumbers
============
*/
void idNAVLocal::GetEdgeVertexNumbers( int edgeNum, int verts[2] ) const {
	if ( !file ) {
		verts[0] = verts[1] = 0;
		return;
	}
	const int *v = file->GetEdge( abs(edgeNum) ).vertexNum;
	verts[0] = v[INTSIGNBITSET(edgeNum)];
	verts[1] = v[INTSIGNBITNOTSET(edgeNum)];
}

/*
============
idNAVLocal::GetEdge
============
*/
void idNAVLocal::GetEdge( int edgeNum, idVec3 &start, idVec3 &end ) const {
	if ( !file ) {
		start.Zero();
		end.Zero();
		return;
	}
	const int *v = file->GetEdge( abs(edgeNum) ).vertexNum;
	start = file->GetVertex( v[INTSIGNBITSET(edgeNum)] );
	end = file->GetVertex( v[INTSIGNBITNOTSET(edgeNum)] );
}


/*
============
idNAVLocal::AdjustPositionAndGetArea
============
*/
int idNAVLocal::AdjustPositionAndGetArea(idVec3& origin)
{
	int area = PointReachableAreaNum(origin, DefaultSearchBounds(), AREA_REACHABLE_WALK);
	PushPointIntoAreaNum(area, origin);
	return area;
}