void CGameRules::RadiusDamage( const CTakeDamageInfo &info, const Vector &vecSrcIn, float flRadius, int iClassIgnore, CBaseEntity *pEntityIgnore ) { const int MASK_RADIUS_DAMAGE = MASK_SHOT&(~CONTENTS_HITBOX); CBaseEntity *pEntity = NULL; trace_t tr; float flAdjustedDamage, falloff; Vector vecSpot; Vector vecSrc = vecSrcIn; if ( flRadius ) falloff = info.GetDamage() / flRadius; else falloff = 1.0; int bInWater = (UTIL_PointContents ( vecSrc, MASK_WATER ) & MASK_WATER) ? true : false; #ifdef HL2_DLL if( bInWater ) { // Only muffle the explosion if deeper than 2 feet in water. if( !(UTIL_PointContents(vecSrc + Vector(0, 0, 24), MASK_WATER) & MASK_WATER) ) { bInWater = false; } } #endif // HL2_DLL vecSrc.z += 1;// in case grenade is lying on the ground float flHalfRadiusSqr = Square( flRadius / 2.0f ); // iterate on all entities in the vicinity. for ( CEntitySphereQuery sphere( vecSrc, flRadius ); (pEntity = sphere.GetCurrentEntity()) != NULL; sphere.NextEntity() ) { // This value is used to scale damage when the explosion is blocked by some other object. float flBlockedDamagePercent = 0.0f; if ( pEntity == pEntityIgnore ) continue; if ( pEntity->m_takedamage == DAMAGE_NO ) continue; // UNDONE: this should check a damage mask, not an ignore if ( iClassIgnore != CLASS_NONE && pEntity->Classify() == iClassIgnore ) {// houndeyes don't hurt other houndeyes with their attack continue; } // blast's don't tavel into or out of water if (bInWater && pEntity->GetWaterLevel() == 0) continue; if (!bInWater && pEntity->GetWaterLevel() == 3) continue; // Check that the explosion can 'see' this entity. vecSpot = pEntity->BodyTarget( vecSrc, false ); UTIL_TraceLine( vecSrc, vecSpot, MASK_RADIUS_DAMAGE, info.GetInflictor(), COLLISION_GROUP_NONE, &tr ); if( old_radius_damage.GetBool() ) { if ( tr.fraction != 1.0 && tr.m_pEnt != pEntity ) continue; } else { if ( tr.fraction != 1.0 ) { if ( IsExplosionTraceBlocked(&tr) ) { if( ShouldUseRobustRadiusDamage( pEntity ) ) { if( vecSpot.DistToSqr( vecSrc ) > flHalfRadiusSqr ) { // Only use robust model on a target within one-half of the explosion's radius. continue; } Vector vecToTarget = vecSpot - tr.endpos; VectorNormalize( vecToTarget ); // We're going to deflect the blast along the surface that // interrupted a trace from explosion to this target. Vector vecUp, vecDeflect; CrossProduct( vecToTarget, tr.plane.normal, vecUp ); CrossProduct( tr.plane.normal, vecUp, vecDeflect ); VectorNormalize( vecDeflect ); // Trace along the surface that intercepted the blast... UTIL_TraceLine( tr.endpos, tr.endpos + vecDeflect * ROBUST_RADIUS_PROBE_DIST, MASK_RADIUS_DAMAGE, info.GetInflictor(), COLLISION_GROUP_NONE, &tr ); //NDebugOverlay::Line( tr.startpos, tr.endpos, 255, 255, 0, false, 10 ); // ...to see if there's a nearby edge that the explosion would 'spill over' if the blast were fully simulated. UTIL_TraceLine( tr.endpos, vecSpot, MASK_RADIUS_DAMAGE, info.GetInflictor(), COLLISION_GROUP_NONE, &tr ); //NDebugOverlay::Line( tr.startpos, tr.endpos, 255, 0, 0, false, 10 ); if( tr.fraction != 1.0 && tr.DidHitWorld() ) { // Still can't reach the target. continue; } // else fall through } else { continue; } } // UNDONE: Probably shouldn't let children block parents either? Or maybe those guys should set their owner if they want this behavior? // HL2 - Dissolve damage is not reduced by interposing non-world objects if( tr.m_pEnt && tr.m_pEnt != pEntity && tr.m_pEnt->GetOwnerEntity() != pEntity ) { // Some entity was hit by the trace, meaning the explosion does not have clear // line of sight to the entity that it's trying to hurt. If the world is also // blocking, we do no damage. CBaseEntity *pBlockingEntity = tr.m_pEnt; //Msg( "%s may be blocked by %s...", pEntity->GetClassname(), pBlockingEntity->GetClassname() ); UTIL_TraceLine( vecSrc, vecSpot, CONTENTS_SOLID, info.GetInflictor(), COLLISION_GROUP_NONE, &tr ); if( tr.fraction != 1.0 ) { continue; } // Now, if the interposing object is physics, block some explosion force based on its mass. if( pBlockingEntity->VPhysicsGetObject() ) { const float MASS_ABSORB_ALL_DAMAGE = 350.0f; float flMass = pBlockingEntity->VPhysicsGetObject()->GetMass(); float scale = flMass / MASS_ABSORB_ALL_DAMAGE; // Absorbed all the damage. if( scale >= 1.0f ) { continue; } ASSERT( scale > 0.0f ); flBlockedDamagePercent = scale; //Msg(" Object (%s) weighing %fkg blocked %f percent of explosion damage\n", pBlockingEntity->GetClassname(), flMass, scale * 100.0f); } else { // Some object that's not the world and not physics. Generically block 25% damage flBlockedDamagePercent = 0.25f; } } } } // decrease damage for an ent that's farther from the bomb. float flDistanceToEnt = ( vecSrc - tr.endpos ).Length(); flAdjustedDamage = flDistanceToEnt * falloff; flAdjustedDamage = info.GetDamage() - flAdjustedDamage; if ( flAdjustedDamage <= 0 ) { continue; } // the explosion can 'see' this entity, so hurt them! if (tr.startsolid) { // if we're stuck inside them, fixup the position and distance tr.endpos = vecSrc; tr.fraction = 0.0; } CTakeDamageInfo adjustedInfo = info; //Msg("%s: Blocked damage: %f percent (in:%f out:%f)\n", pEntity->GetClassname(), flBlockedDamagePercent * 100, flAdjustedDamage, flAdjustedDamage - (flAdjustedDamage * flBlockedDamagePercent) ); adjustedInfo.SetRadius( flRadius ); adjustedInfo.SetDamage( flAdjustedDamage - (flAdjustedDamage * flBlockedDamagePercent) ); // Now make a consideration for skill level! if( info.GetAttacker() && info.GetAttacker()->IsPlayer() && pEntity->IsNPC() ) { // An explosion set off by the player is harming an NPC. Adjust damage accordingly. adjustedInfo.AdjustPlayerDamageInflictedForSkillLevel(); } Vector dir = vecSpot - vecSrc; VectorNormalize( dir ); // If we don't have a damage force, manufacture one if ( adjustedInfo.GetDamagePosition() == vec3_origin || adjustedInfo.GetDamageForce() == vec3_origin ) { if ( !( adjustedInfo.GetDamageType() & DMG_PREVENT_PHYSICS_FORCE ) ) { CalculateExplosiveDamageForce( &adjustedInfo, dir, vecSrc ); } } else { // Assume the force passed in is the maximum force. Decay it based on falloff. float flForce = adjustedInfo.GetDamageForce().Length() * falloff; adjustedInfo.SetDamageForce( dir * flForce ); adjustedInfo.SetDamagePosition( vecSrc ); } if ( tr.fraction != 1.0 && pEntity == tr.m_pEnt ) { ClearMultiDamage( ); pEntity->DispatchTraceAttack( adjustedInfo, dir, &tr ); ApplyMultiDamage(); } else { pEntity->TakeDamage( adjustedInfo ); } // Now hit all triggers along the way that respond to damage... pEntity->TraceAttackToTriggers( adjustedInfo, vecSrc, tr.endpos, dir ); #if defined( GAME_DLL ) if ( info.GetAttacker() && info.GetAttacker()->IsPlayer() && ToBaseCombatCharacter( tr.m_pEnt ) ) { // This is a total hack!!! bool bIsPrimary = true; CBasePlayer *player = ToBasePlayer( info.GetAttacker() ); CBaseCombatWeapon *pWeapon = player->GetActiveWeapon(); if ( pWeapon && FClassnameIs( pWeapon, "weapon_smg1" ) ) { bIsPrimary = false; } gamestats->Event_WeaponHit( player, bIsPrimary, (pWeapon != NULL) ? player->GetActiveWeapon()->GetClassname() : "NULL", info ); } #endif } }