Force Grab

Trying to include force grab
This commit is contained in:
Grant Bagwell 2020-11-17 18:23:33 +01:00
parent 28bd463e09
commit d1c3dbad45
2 changed files with 290 additions and 0 deletions

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/*
===========================================================================
Doom 3 BFG Edition GPL Source Code
Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company.
This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").
Doom 3 BFG Edition 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.
Doom 3 BFG Edition 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 Doom 3 BFG Edition Source Code. If not, see <http://www.gnu.org/licenses/>.
In addition, the Doom 3 BFG Edition 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 Doom 3 BFG Edition 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 id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
===========================================================================
*/
#include "sys/platform.h"
#include "framework/UsercmdGen.h"
#include "physics/Physics.h"
#include "physics/Force_Grab.h"
#include "renderer/RenderSystem.h"
CLASS_DECLARATION( idForce, idForce_Grab )
END_CLASS
/*
================
idForce_Grab::Save
================
*/
void idForce_Grab::Save( idSaveGame* savefile ) const
{
savefile->WriteFloat( damping );
savefile->WriteVec3( goalPosition );
savefile->WriteFloat( distanceToGoal );
savefile->WriteInt( id );
}
/*
================
idForce_Grab::Restore
================
*/
void idForce_Grab::Restore( idRestoreGame* savefile )
{
//Note: Owner needs to call set physics
savefile->ReadFloat( damping );
savefile->ReadVec3( goalPosition );
savefile->ReadFloat( distanceToGoal );
savefile->ReadInt( id );
}
/*
================
idForce_Grab::idForce_Grab
================
*/
idForce_Grab::idForce_Grab()
{
damping = 0.5f;
physics = NULL;
id = 0;
}
/*
================
idForce_Grab::~idForce_Grab
================
*/
idForce_Grab::~idForce_Grab()
{
}
/*
================
idForce_Grab::Init
================
*/
void idForce_Grab::Init( float damping )
{
if( damping >= 0.0f && damping < 1.0f )
{
this->damping = damping;
}
}
/*
================
idForce_Grab::SetPhysics
================
*/
void idForce_Grab::SetPhysics( idPhysics* phys, int id, const idVec3& goal )
{
this->physics = phys;
this->id = id;
this->goalPosition = goal;
}
/*
================
idForce_Grab::SetGoalPosition
================
*/
void idForce_Grab::SetGoalPosition( const idVec3& goal )
{
this->goalPosition = goal;
}
/*
=================
idForce_Grab::GetDistanceToGoal
=================
*/
float idForce_Grab::GetDistanceToGoal()
{
return distanceToGoal;
}
/*
================
idForce_Grab::Evaluate
================
*/
void idForce_Grab::Evaluate( int time )
{
if( !physics )
{
return;
}
idVec3 forceDir, v, objectCenter;
float forceAmt;
float mass = physics->GetMass( id );
objectCenter = physics->GetAbsBounds( id ).GetCenter();
if( g_grabberRandomMotion.GetBool() && !common->IsMultiplayer() )
{
// Jitter the objectCenter around so it doesn't remain stationary
float SinOffset = idMath::Sin( ( float )( gameLocal.time ) / 66.f );
float randScale1 = gameLocal.random.RandomFloat();
float randScale2 = gameLocal.random.CRandomFloat();
objectCenter.x += ( SinOffset * 3.5f * randScale1 ) + ( randScale2 * 1.2f );
objectCenter.y += ( SinOffset * -3.5f * randScale1 ) + ( randScale2 * 1.4f );
objectCenter.z += ( SinOffset * 2.4f * randScale1 ) + ( randScale2 * 1.6f );
}
forceDir = goalPosition - objectCenter;
distanceToGoal = forceDir.Normalize();
float temp = distanceToGoal;
if( temp > 12.f && temp < 32.f )
{
temp = 32.f;
}
forceAmt = ( 1000.f * mass ) + ( 500.f * temp * mass );
if( forceAmt / mass > 120000.f )
{
forceAmt = 120000.f * mass;
}
physics->AddForce( id, objectCenter, forceDir * forceAmt );
if( distanceToGoal < 196.f )
{
v = physics->GetLinearVelocity( id );
physics->SetLinearVelocity( v * damping, id );
}
if( distanceToGoal < 16.f )
{
v = physics->GetAngularVelocity( id );
if( v.LengthSqr() > Square( 8 ) )
{
physics->SetAngularVelocity( v * 0.99999f, id );
}
}
}
/*
================
idForce_Grab::RemovePhysics
================
*/
void idForce_Grab::RemovePhysics( const idPhysics* phys )
{
if( physics == phys )
{
physics = NULL;
}
}

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/*
===========================================================================
Doom 3 BFG Edition GPL Source Code
Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company.
This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").
Doom 3 BFG Edition 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.
Doom 3 BFG Edition 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 Doom 3 BFG Edition Source Code. If not, see <http://www.gnu.org/licenses/>.
In addition, the Doom 3 BFG Edition 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 Doom 3 BFG Edition 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 id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
===========================================================================
*/
#ifndef __FORCE_GRAB_H__
#define __FORCE_GRAB_H__
#include "physics/Force.h"
/*
===============================================================================
Drag force
===============================================================================
*/
class idForce_Grab : public idForce
{
public:
CLASS_PROTOTYPE( idForce_Grab );
void Save( idSaveGame* savefile ) const;
void Restore( idRestoreGame* savefile );
idForce_Grab();
virtual ~idForce_Grab();
// initialize the drag force
void Init( float damping );
// set physics object being dragged
void SetPhysics( idPhysics* physics, int id, const idVec3& goal );
// update the goal position
void SetGoalPosition( const idVec3& goal );
public: // common force interface
virtual void Evaluate( int time );
virtual void RemovePhysics( const idPhysics* phys );
// Get the distance from object to goal position
float GetDistanceToGoal();
private:
// properties
float damping;
idVec3 goalPosition;
float distanceToGoal;
// positioning
idPhysics* physics; // physics object
int id; // clip model id of physics object
};
#endif /* !__FORCE_GRAB_H__ */