ddnet/src/game/server/entities/laser.cpp

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// copyright (c) 2007 magnus auvinen, see licence.txt for more info
#include <game/generated/protocol.h>
#include <game/server/gamecontext.h>
#include "laser.h"
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CLaser::CLaser(CGameWorld *pGameWorld, vec2 Pos, vec2 Direction, float StartEnergy, int Owner)
: CEntity(pGameWorld, NETOBJTYPE_LASER)
{
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m_Pos = Pos;
m_Owner = Owner;
m_Energy = StartEnergy;
m_Dir = Direction;
m_Bounces = 0;
m_EvalTick = 0;
GameWorld()->InsertEntity(this);
DoBounce();
}
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bool CLaser::HitCharacter(vec2 From, vec2 To)
{
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vec2 At;
CCharacter *OwnerChar = GameServer()->GetPlayerChar(m_Owner);
CCharacter *Hit = GameServer()->m_World.IntersectCharacter(m_Pos, To, 0.f, At, OwnerChar);
if(!Hit)
return false;
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m_From = From;
m_Pos = At;
m_Energy = -1;
Hit->TakeDamage(vec2(0.f, 0.f), GameServer()->Tuning()->m_LaserDamage, m_Owner, WEAPON_RIFLE);
return true;
}
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void CLaser::DoBounce()
{
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m_EvalTick = Server()->Tick();
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if(m_Energy < 0)
{
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GameServer()->m_World.DestroyEntity(this);
return;
}
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vec2 To = m_Pos + m_Dir * m_Energy;
vec2 OrgTo = To;
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if(GameServer()->Collision()->IntersectLine(m_Pos, To, 0x0, &To))
{
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if(!HitCharacter(m_Pos, To))
{
// intersected
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m_From = m_Pos;
m_Pos = To;
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vec2 TempPos = m_Pos;
vec2 TempDir = m_Dir * 4.0f;
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GameServer()->Collision()->MovePoint(&TempPos, &TempDir, 1.0f, 0);
m_Pos = TempPos;
m_Dir = normalize(TempDir);
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m_Energy -= distance(m_From, m_Pos) + GameServer()->Tuning()->m_LaserBounceCost;
m_Bounces++;
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if(m_Bounces > GameServer()->Tuning()->m_LaserBounceNum)
m_Energy = -1;
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GameServer()->CreateSound(m_Pos, SOUND_RIFLE_BOUNCE);
}
}
else
{
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if(!HitCharacter(m_Pos, To))
{
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m_From = m_Pos;
m_Pos = To;
m_Energy = -1;
}
}
}
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void CLaser::Reset()
{
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GameServer()->m_World.DestroyEntity(this);
}
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void CLaser::Tick()
{
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if(Server()->Tick() > m_EvalTick+(Server()->TickSpeed()*GameServer()->Tuning()->m_LaserBounceDelay)/1000.0f)
DoBounce();
}
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void CLaser::Snap(int SnappingClient)
{
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if(NetworkClipped(SnappingClient))
return;
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CNetObj_Laser *pObj = static_cast<CNetObj_Laser *>(Server()->SnapNewItem(NETOBJTYPE_LASER, m_Id, sizeof(CNetObj_Laser)));
pObj->m_X = (int)m_Pos.x;
pObj->m_Y = (int)m_Pos.y;
pObj->m_FromX = (int)m_From.x;
pObj->m_FromY = (int)m_From.y;
pObj->m_StartTick = m_EvalTick;
}