Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: A stationary gun that players can man
//
// $NoKeywords: $
//=============================================================================//
#include "cbase.h"
#include "tf_obj_manned_plasmagun_shared.h"
#include "tf_movedata.h"
ConVar mannedgun_usethirdperson( "mannedgun_usethirdperson", "1", FCVAR_REPLICATED, "Use third person view while in manned guns built on vehicles." );
#define MANNED_PLASMAGUN_AIMING_CONE_ANGLE 45.0f // total angle of aiming
#define MANNED_PLASMAGUN_YAW_SPEED 1000.0f
#define MANNED_PLASMAGUN_MAX_PITCH 50.0f
#define MANNED_PLASMAGUN_BARREL_MAX_PITCH 30.0f
float CObjectMannedPlasmagunMovement::GetMaxYaw() const
{
return MANNED_PLASMAGUN_AIMING_CONE_ANGLE;
}
float CObjectMannedPlasmagunMovement::GetMinYaw() const
{
return -MANNED_PLASMAGUN_AIMING_CONE_ANGLE;
}
float CObjectMannedPlasmagunMovement::GetMaxPitch() const
{
return MANNED_PLASMAGUN_MAX_PITCH;
}
void CObjectMannedPlasmagunMovement::ProcessMovement( CBasePlayer *pPlayer, CMoveData *pMove )
{
CTFMoveData *pMoveData = (CTFMoveData*)pMove;
Assert( sizeof(MannedPlasmagunData_t) <= pMoveData->VehicleDataMaxSize() );
MannedPlasmagunData_t *pVehicleData = (MannedPlasmagunData_t*)pMoveData->VehicleData();
bool bSimple = (pVehicleData->m_nMoveStyle == MOVEMENT_STYLE_SIMPLE);
CBaseTFVehicle *pVehicle = pVehicleData->m_pVehicle;
// Flush caches since bone controllers might be wrong since they are not in the cache yet
pVehicle->InvalidateBoneCache();
// Get the view direction *in world coordinates*
Vector vPlayerEye = pPlayer->EyePosition();
QAngle angEyeAngles = pPlayer->LocalEyeAngles();
Vector vPlayerForward;
AngleVectors( angEyeAngles, &vPlayerForward, NULL, NULL );
// Now figure out the pitch. This is done by casting a ray to see where the player's aiming reticle is pointing.
// Then we do some trig to find out what angle the turret should point so it can see the target.
// NOTE: this is done in the tank's local space so it works when the tank is banked.
VMatrix mGunToWorld = SetupMatrixTranslation(pVehicle->GetAbsOrigin()) * SetupMatrixAngles(pVehicle->GetAbsAngles());
VMatrix mWorldToGun = mGunToWorld.InverseTR();
// First trace only on the world..
Vector start = vPlayerEye;
Vector end = start + vPlayerForward * 5000.0f;
Vector vTarget;
if ( bSimple )
{
vTarget = end;
}
else
{
trace_t trace;
UTIL_TraceLine(start, end, MASK_SOLID_BRUSHONLY, pVehicle, COLLISION_GROUP_NONE, &trace);
vTarget = trace.endpos;
if(trace.fraction == 1)
{
// It didn't hit the world, so trace on ents.
UTIL_TraceLine(start, end, MASK_PLAYERSOLID|MASK_NPCSOLID, pVehicle, COLLISION_GROUP_NONE, &trace);
vTarget = trace.endpos;
if(trace.fraction == 1)
{
// Didn't hit any ents.. just assume it's way out in front of the player's view.
vTarget = end;
}
}
}
// Transform the world position into gun space.
vTarget = mWorldToGun * vTarget;
// Compute the position of the barrel pivot point as measured in the coordinate system of the gun
Vector vTurretBase;
QAngle vTurretBaseAngles;
pVehicle->GetAttachment(pVehicleData->m_nBarrelPivotAttachment, vTurretBase, vTurretBaseAngles);
vTurretBase = mWorldToGun * vTurretBase;
// Make everything be relative to the pivot...
vTarget -= vTurretBase;
// Now we've got the target vector in local space. Now just figure out what
// the gun angles need to be to hit the target.
QAngle vWantedAngles;
VectorAngles( vTarget, vWantedAngles );
pVehicleData->m_flGunPitch = vWantedAngles[PITCH];
pVehicleData->m_flGunYaw = vWantedAngles[YAW];
// Place the player at the feet of the vehicle
Vector vStandAngles;
pVehicle->GetAttachmentLocal(pVehicleData->m_nStandAttachment, pMove->m_vecAbsOrigin, pMove->m_vecAngles);
}