void ASWeaponInstant::FireWeapon()
{
const FVector AimDir = GetAdjustedAim();
const FVector CameraPos = GetCameraDamageStartLocation(AimDir);
const FVector EndPos = CameraPos + (AimDir * WeaponRange);
/* Check for impact by tracing from the camera position */
FHitResult Impact = WeaponTrace(CameraPos, EndPos);
const FVector MuzzleOrigin = GetMuzzleLocation();
FVector AdjustedAimDir = AimDir;
if (Impact.bBlockingHit)
{
/* Adjust the shoot direction to hit at the crosshair. */
AdjustedAimDir = (Impact.ImpactPoint - MuzzleOrigin).GetSafeNormal();
/* Re-trace with the new aim direction coming out of the weapon muzzle */
Impact = WeaponTrace(MuzzleOrigin, MuzzleOrigin + (AdjustedAimDir * WeaponRange));
}
else
{
/* Use the maximum distance as the adjust direction */
Impact.ImpactPoint = FVector_NetQuantize(EndPos);
}
ProcessInstantHit(Impact, MuzzleOrigin, AdjustedAimDir);
}
void AAmethystWeapon_Projectile::FireWeapon()
{
FVector ShootDir = GetAdjustedAim();
FVector Origin = GetMuzzleLocation();
// trace from camera to check what's under crosshair
const float ProjectileAdjustRange = 10000.0f;
const FVector StartTrace = GetCameraDamageStartLocation(ShootDir);
const FVector EndTrace = StartTrace + ShootDir * ProjectileAdjustRange;
FHitResult Impact = WeaponTrace(StartTrace, EndTrace);
// and adjust directions to hit that actor
if (Impact.bBlockingHit)
{
const FVector AdjustedDir = (Impact.ImpactPoint - Origin).SafeNormal();
bool bWeaponPenetration = false;
const float DirectionDot = FVector::DotProduct(AdjustedDir, ShootDir);
if (DirectionDot < 0.0f)
{
// shooting backwards = weapon is penetrating
bWeaponPenetration = true;
}
else if (DirectionDot < 0.5f)
{
// check for weapon penetration if angle difference is big enough
// raycast along weapon mesh to check if there's blocking hit
FVector MuzzleStartTrace = Origin - GetMuzzleDirection() * 150.0f;
FVector MuzzleEndTrace = Origin;
FHitResult MuzzleImpact = WeaponTrace(MuzzleStartTrace, MuzzleEndTrace);
if (MuzzleImpact.bBlockingHit)
{
bWeaponPenetration = true;
}
}
if (bWeaponPenetration)
{
// spawn at crosshair position
Origin = Impact.ImpactPoint - ShootDir * 10.0f;
}
else
{
// adjust direction to hit
ShootDir = AdjustedDir;
}
}
ServerFireProjectile(Origin, ShootDir);
}
void ABaseWeapon::Instant_Fire()
{
const int32 RandomSeed = FMath::Rand();
FRandomStream WeaponRandomStream(RandomSeed);
const float CurrentSpread = WeaponConfig.WeaponSpread;
const float SpreadCone = FMath::DegreesToRadians(WeaponConfig.WeaponSpread * 0.5);
const FVector AimDir = MyPawn->GetActorForwardVector();
const FVector StartTrace = MyPawn->GetActorLocation();
const FVector ShootDir = WeaponRandomStream.VRandCone(AimDir, SpreadCone, SpreadCone);
FVector EndTrace;
if (Target)
{
FVector TargetDir = (MyPawn->GetActorLocation() - Target->GetActorLocation());
TargetDir.Normalize();
FVector ShootDir2 = WeaponRandomStream.VRandCone(-TargetDir, SpreadCone, SpreadCone);
EndTrace = StartTrace + ShootDir2 * WeaponConfig.WeaponRange;
}
else
{
EndTrace = StartTrace + ShootDir * WeaponConfig.WeaponRange;
}
const FHitResult Impact = WeaponTrace(StartTrace, EndTrace);
SpawnParticle(EndTrace);
HitActor = Cast<AActor>(Impact.GetActor());
//DrawDebugLine(GetWorld(), StartTrace, EndTrace, FColor::Red, false, 1.0f);
if (HitActor)
{
Server_DealDamage(Impact, ShootDir, WeaponConfig);
}
}
//If we are firing trace the beam
void AAssaultWeapon::Tick( float DeltaTime )
{
Super::Tick( DeltaTime );
if(firing){
WeaponTrace();
}
}
void ASWeaponInstant::FireWeapon()
{
const FVector AimDir = GetAdjustedAim();
const FVector StartPos = GetCameraDamageStartLocation(AimDir);
const FVector EndPos = StartPos + (AimDir * WeaponRange);
const FHitResult Impact = WeaponTrace(StartPos, EndPos);
ProcessInstantHit(Impact, StartPos, AimDir);
}
void AFP_FirstPersonCharacter::OnFire()
{
// Play a sound if there is one
if (FireSound != NULL)
{
UGameplayStatics::PlaySoundAtLocation(this, FireSound, GetActorLocation());
}
// try and play a firing animation if specified
if(FireAnimation != NULL)
{
// Get the animation object for the arms mesh
UAnimInstance* AnimInstance = Mesh1P->GetAnimInstance();
if(AnimInstance != NULL)
{
AnimInstance->Montage_Play(FireAnimation, 1.f);
}
}
// Now send a trace from the end of our gun to see if we should hit anything
APlayerController* PlayerController = Cast<APlayerController>(GetController());
// Calculate the direction of fire and the start location for trace
FVector CamLoc;
FRotator CamRot;
PlayerController->GetPlayerViewPoint(CamLoc, CamRot);
const FVector ShootDir = CamRot.Vector();
FVector StartTrace = FVector::ZeroVector;
if (PlayerController)
{
FRotator UnusedRot;
PlayerController->GetPlayerViewPoint(StartTrace, UnusedRot);
// Adjust trace so there is nothing blocking the ray between the camera and the pawn, and calculate distance from adjusted start
StartTrace = StartTrace + ShootDir * ((GetActorLocation() - StartTrace) | ShootDir);
}
// Calculate endpoint of trace
const FVector EndTrace = StartTrace + ShootDir * WeaponRange;
// Check for impact
const FHitResult Impact = WeaponTrace(StartTrace, EndTrace);
// Deal with impact
AActor* DamagedActor = Impact.GetActor();
UPrimitiveComponent* DamagedComponent = Impact.GetComponent();
// If we hit an actor, with a component that is simulating physics, apply an impulse
if ((DamagedActor != NULL) && (DamagedActor != this) && (DamagedComponent != NULL) && DamagedComponent->IsSimulatingPhysics())
{
DamagedComponent->AddImpulseAtLocation(ShootDir*WeaponDamage, Impact.Location);
}
}
void ASWeaponInstant::SimulateInstantHit(const FVector& Origin)
{
const FVector StartTrace = Origin;
const FVector AimDir = GetAdjustedAim();
const FVector EndTrace = StartTrace + (AimDir * WeaponRange);
const FHitResult Impact = WeaponTrace(StartTrace, EndTrace);
if (Impact.bBlockingHit)
{
SpawnImpactEffects(Impact);
SpawnTrailEffects(Impact.ImpactPoint);
}
else
{
SpawnTrailEffects(EndTrace);
}
// Do not spawn near-hit if we actually hit a pawn
if (Impact.GetActor() && Impact.GetActor()->IsA(ASCharacter::StaticClass()))
{
return;
}
for (FConstPawnIterator It = GetWorld()->GetPawnIterator(); It; It++)
{
// Find a locally controlled pawn that is not the instigator of the hit.
ASCharacter* OtherPawn = Cast<ASCharacter>(*It);
if (OtherPawn && OtherPawn != GetPawnOwner() && OtherPawn->IsLocallyControlled())
{
// Calculate shortest distance to point. (using the estimated eye height)
const float DistanceToPawn = FVector::CrossProduct(AimDir, OtherPawn->GetActorLocation() - Origin).Size();
/* Owner can be lost before client gets to simulate the hit. */
ASCharacter* P = GetPawnOwner();
if (P)
{
FVector LookAt = (OtherPawn->GetActorLocation() - GetPawnOwner()->GetActorLocation());
LookAt.Normalize();
float LookDot = FVector::DotProduct(AimDir, LookAt);
if (DistanceToPawn < NearHitMaxDistance && LookDot > 0)
{
// TODO: Play at nearest "almost" hit location.
const FVector SoundLocation = Origin + (AimDir * DistanceToPawn);
// Volume is based on distance to missed shot
float Volume = FMath::Clamp(1 - (DistanceToPawn / NearHitMaxDistance), 0.1f, 1.0f);
UGameplayStatics::PlaySoundAtLocation(this, NearHitSound, /*SoundLocation*/ OtherPawn->GetActorLocation(), Volume);
}
}
}
}
}
void AWeapon::Instant_Fire()
{
const int32 RandomSeed = FMath::Rand();
FRandomStream WeaponRandomStream(RandomSeed);
const float CurrentSpread = WeaponConfig.WeaponSpread;
const float SpreadCone = FMath::DegreesToRadians(WeaponConfig.WeaponSpread * 0.5);
const FVector AimDir = WeaponMesh->GetSocketRotation("MF").Vector();
const FVector StartTrace = WeaponMesh->GetSocketLocation("MF");
const FVector ShootDir = WeaponRandomStream.VRandCone(AimDir, SpreadCone, SpreadCone);
const FVector EndTrace = StartTrace + ShootDir * WeaponConfig.WeaponRange;
const FHitResult Impact = WeaponTrace(StartTrace, EndTrace);
ProcessInstantHit(Impact, StartTrace, ShootDir, RandomSeed, CurrentSpread);
}
void AShooterWeapon_Instant::FireWeapon()
{
const int32 RandomSeed = FMath::Rand();
FRandomStream WeaponRandomStream(RandomSeed);
const float CurrentSpread = GetCurrentSpread();
const float ConeHalfAngle = FMath::DegreesToRadians(CurrentSpread * 0.5f);
const FVector AimDir = GetAdjustedAim();
const FVector StartTrace = GetCameraDamageStartLocation(AimDir);
const FVector ShootDir = WeaponRandomStream.VRandCone(AimDir, ConeHalfAngle, ConeHalfAngle);
const FVector EndTrace = StartTrace + ShootDir * InstantConfig.WeaponRange;
const FHitResult Impact = WeaponTrace(StartTrace, EndTrace);
ProcessInstantHit(Impact, StartTrace, ShootDir, RandomSeed, CurrentSpread);
CurrentFiringSpread = FMath::Min(InstantConfig.FiringSpreadMax, CurrentFiringSpread + InstantConfig.FiringSpreadIncrement);
}
void ATraceWeapon::Attack()
{
Super::Attack();
FVector Start = GetActorLocation();
FVector Direction = Instigator->GetActorRotation().Vector();
FVector End = Start + Direction * Range;
FHitResult Impact = WeaponTrace(Start, End);
HitResult(Impact, Start, Direction);
}
void ASWeaponInstant::SimulateInstantHit(const FVector& ImpactPoint)
{
const FVector MuzzleOrigin = GetMuzzleLocation();
/* Adjust direction based on desired crosshair impact point and muzzle location */
const FVector AimDir = (ImpactPoint - MuzzleOrigin).GetSafeNormal();
const FVector EndTrace = MuzzleOrigin + (AimDir * WeaponRange);
const FHitResult Impact = WeaponTrace(MuzzleOrigin, EndTrace);
if (Impact.bBlockingHit)
{
SpawnImpactEffects(Impact);
SpawnTrailEffects(Impact.ImpactPoint);
}
else
{
SpawnTrailEffects(EndTrace);
}
}
void AShooterWeapon_Instant::SimulateInstantHit(const FVector& ShotOrigin, int32 RandomSeed, float ReticleSpread)
{
FRandomStream WeaponRandomStream(RandomSeed);
const float ConeHalfAngle = FMath::DegreesToRadians(ReticleSpread * 0.5f);
const FVector StartTrace = ShotOrigin;
const FVector AimDir = GetAdjustedAim();
const FVector ShootDir = WeaponRandomStream.VRandCone(AimDir, ConeHalfAngle, ConeHalfAngle);
const FVector EndTrace = StartTrace + ShootDir * InstantConfig.WeaponRange;
FHitResult Impact = WeaponTrace(StartTrace, EndTrace);
if (Impact.bBlockingHit)
{
SpawnImpactEffects(Impact);
SpawnTrailEffect(Impact.ImpactPoint);
}
else
{
SpawnTrailEffect(EndTrace);
}
}
void AShooterWeapon_Instant::SpawnImpactEffects(const FHitResult& Impact)
{
if (ImpactTemplate && Impact.bBlockingHit)
{
FHitResult UseImpact = Impact;
// trace again to find component lost during replication
if (!Impact.Component.IsValid())
{
const FVector StartTrace = Impact.ImpactPoint + Impact.ImpactNormal * 10.0f;
const FVector EndTrace = Impact.ImpactPoint - Impact.ImpactNormal * 10.0f;
FHitResult Hit = WeaponTrace(StartTrace, EndTrace);
UseImpact = Hit;
}
AShooterImpactEffect* EffectActor = GetWorld()->SpawnActorDeferred<AShooterImpactEffect>(ImpactTemplate, Impact.ImpactPoint, Impact.ImpactNormal.Rotation());
if (EffectActor)
{
EffectActor->SurfaceHit = UseImpact;
UGameplayStatics::FinishSpawningActor(EffectActor, FTransform(Impact.ImpactNormal.Rotation(), Impact.ImpactPoint));
}
}
}
