Method RenderProjectile

src/game/client/components/items.cpp:22–137

#include <game/mapitems.h>

void CItems::RenderProjectile(const CProjectileData *pCurrent, int ItemId)
{
	int CurWeapon = std::clamp(pCurrent->m_Type, 0, NUM_WEAPONS - 1);

	// get positions
	float Curvature = 0;
	float Speed = 0;
	const CTuningParams *pTuning = GameClient()->GetTuning(pCurrent->m_TuneZone);
	if(CurWeapon == WEAPON_GRENADE)
	{
		Curvature = pTuning->m_GrenadeCurvature;
		Speed = pTuning->m_GrenadeSpeed;
	}
	else if(CurWeapon == WEAPON_SHOTGUN)
	{
		Curvature = pTuning->m_ShotgunCurvature;
		Speed = pTuning->m_ShotgunSpeed;
	}
	else if(CurWeapon == WEAPON_GUN)
	{
		Curvature = pTuning->m_GunCurvature;
		Speed = pTuning->m_GunSpeed;
	}

	bool LocalPlayerInGame = false;

	if(GameClient()->m_Snap.m_pLocalInfo)
		LocalPlayerInGame = GameClient()->m_aClients[GameClient()->m_Snap.m_pLocalInfo->m_ClientId].m_Team != TEAM_SPECTATORS;

	static float s_LastGameTickTime = Client()->GameTickTime(g_Config.m_ClDummy);
	if(GameClient()->m_Snap.m_pGameInfoObj && !(GameClient()->m_Snap.m_pGameInfoObj->m_GameStateFlags & GAMESTATEFLAG_PAUSED))
		s_LastGameTickTime = Client()->GameTickTime(g_Config.m_ClDummy);

	bool IsOtherTeam = (pCurrent->m_ExtraInfo && pCurrent->m_Owner >= 0 && GameClient()->IsOtherTeam(pCurrent->m_Owner));

	int PredictionTick = Client()->GetPredictionTick();

	float Ct;
	if(GameClient()->Predict() && GameClient()->AntiPingGrenade() && LocalPlayerInGame && !IsOtherTeam)
		Ct = ((float)(PredictionTick - 1 - pCurrent->m_StartTick) + Client()->PredIntraGameTick(g_Config.m_ClDummy)) / (float)Client()->GameTickSpeed();
	else
		Ct = (Client()->PrevGameTick(g_Config.m_ClDummy) - pCurrent->m_StartTick) / (float)Client()->GameTickSpeed() + s_LastGameTickTime;
	if(Ct < 0)
	{
		if(Ct > -s_LastGameTickTime / 2)
		{
			// Fixup the timing which might be screwed during demo playback because
			// s_LastGameTickTime depends on the system timer, while the other part
			// (Client()->PrevGameTick(g_Config.m_ClDummy) - pCurrent->m_StartTick) / (float)Client()->GameTickSpeed()
			// is virtually constant (for projectiles fired on the current game tick):
			// (x - (x+2)) / 50 = -0.04
			//
			// We have a strict comparison for the passed time being more than the time between ticks
			// if(CurtickStart > m_Info.m_CurrentTime) in CDemoPlayer::Update()
			// so on the practice the typical value of s_LastGameTickTime varies from 0.02386 to 0.03999
			// which leads to Ct from -0.00001 to -0.01614.
			// Round up those to 0.0 to fix missing rendering of the projectile.
			Ct = 0;