source-engine/game/shared/sdk/sdk_player_shared.cpp

//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: 
//
//=============================================================================//

#include "cbase.h"

#ifdef CLIENT_DLL
	
	#include "c_sdk_player.h"

#else

	#include "sdk_player.h"

#endif

#include "gamevars_shared.h"
#include "takedamageinfo.h"
#include "effect_dispatch_data.h"
#include "engine/ivdebugoverlay.h"

ConVar sv_showimpacts("sv_showimpacts", "0", FCVAR_REPLICATED, "Shows client (red) and server (blue) bullet impact point" );

void DispatchEffect( const char *pName, const CEffectData &data );

CWeaponSDKBase* CSDKPlayer::SDKAnim_GetActiveWeapon()
{
	return GetActiveSDKWeapon();
}

bool CSDKPlayer::SDKAnim_CanMove()
{
	return true;
}

void CSDKPlayer::FireBullet( 
						   Vector vecSrc,	// shooting postion
						   const QAngle &shootAngles,  //shooting angle
						   float vecSpread, // spread vector
						   int iDamage, // base damage
						   int iBulletType, // ammo type
						   CBaseEntity *pevAttacker, // shooter
						   bool bDoEffects,	// create impact effect ?
						   float x,	// spread x factor
						   float y	// spread y factor
						   )
{
	float fCurrentDamage = iDamage;   // damage of the bullet at it's current trajectory
	float flCurrentDistance = 0.0;  //distance that the bullet has traveled so far

	Vector vecDirShooting, vecRight, vecUp;
	AngleVectors( shootAngles, &vecDirShooting, &vecRight, &vecUp );

	if ( !pevAttacker )
		pevAttacker = this;  // the default attacker is ourselves

	// add the spray 
	Vector vecDir = vecDirShooting +
		x * vecSpread * vecRight +
		y * vecSpread * vecUp;

	VectorNormalize( vecDir );

	float flMaxRange = 8000;

	Vector vecEnd = vecSrc + vecDir * flMaxRange; // max bullet range is 10000 units

	trace_t tr; // main enter bullet trace

	UTIL_TraceLine( vecSrc, vecEnd, MASK_SOLID|CONTENTS_DEBRIS|CONTENTS_HITBOX, this, COLLISION_GROUP_NONE, &tr );

		if ( tr.fraction == 1.0f )
			return; // we didn't hit anything, stop tracing shoot

	if ( sv_showimpacts.GetBool() )
	{
#ifdef CLIENT_DLL
		// draw red client impact markers
		debugoverlay->AddBoxOverlay( tr.endpos, Vector(-2,-2,-2), Vector(2,2,2), QAngle( 0, 0, 0), 255,0,0,127, 4 );

		if ( tr.m_pEnt && tr.m_pEnt->IsPlayer() )
		{
			C_BasePlayer *player = ToBasePlayer( tr.m_pEnt );
			player->DrawClientHitboxes( 4, true );
		}
#else
		// draw blue server impact markers
		NDebugOverlay::Box( tr.endpos, Vector(-2,-2,-2), Vector(2,2,2), 0,0,255,127, 4 );

		if ( tr.m_pEnt && tr.m_pEnt->IsPlayer() )
		{
			CBasePlayer *player = ToBasePlayer( tr.m_pEnt );
			player->DrawServerHitboxes( 4, true );
		}
#endif
	}

		//calculate the damage based on the distance the bullet travelled.
		flCurrentDistance += tr.fraction * flMaxRange;

		// damage get weaker of distance
		fCurrentDamage *= pow ( 0.85f, (flCurrentDistance / 500));

		int iDamageType = DMG_BULLET | DMG_NEVERGIB;

		if( bDoEffects )
		{
			// See if the bullet ended up underwater + started out of the water
			if ( enginetrace->GetPointContents( tr.endpos ) & (CONTENTS_WATER|CONTENTS_SLIME) )
			{	
				trace_t waterTrace;
				UTIL_TraceLine( vecSrc, tr.endpos, (MASK_SHOT|CONTENTS_WATER|CONTENTS_SLIME), this, COLLISION_GROUP_NONE, &waterTrace );

				if( waterTrace.allsolid != 1 )
				{
					CEffectData	data;
					data.m_vOrigin = waterTrace.endpos;
					data.m_vNormal = waterTrace.plane.normal;
					data.m_flScale = random->RandomFloat( 8, 12 );

					if ( waterTrace.contents & CONTENTS_SLIME )
					{
						data.m_fFlags |= FX_WATER_IN_SLIME;
					}

					DispatchEffect( "gunshotsplash", data );
				}
			}
			else
			{
				//Do Regular hit effects

				// Don't decal nodraw surfaces
				if ( !( tr.surface.flags & (SURF_SKY|SURF_NODRAW|SURF_HINT|SURF_SKIP) ) )
				{
					CBaseEntity *pEntity = tr.m_pEnt;
					if ( !( !friendlyfire.GetBool() && pEntity && pEntity->IsPlayer() && pEntity->GetTeamNumber() == GetTeamNumber() ) )
					{
						UTIL_ImpactTrace( &tr, iDamageType );
					}
				}
			}
		} // bDoEffects

		// add damage to entity that we hit

#ifdef GAME_DLL
		ClearMultiDamage();

		CTakeDamageInfo info( pevAttacker, pevAttacker, fCurrentDamage, iDamageType );
		CalculateBulletDamageForce( &info, iBulletType, vecDir, tr.endpos );
		tr.m_pEnt->DispatchTraceAttack( info, vecDir, &tr );

		TraceAttackToTriggers( info, tr.startpos, tr.endpos, vecDir );

		ApplyMultiDamage();
#endif
}