本文整理汇总了C++中UPrimitiveComponent::AddForceAtLocation方法的典型用法代码示例。如果您正苦于以下问题:C++ UPrimitiveComponent::AddForceAtLocation方法的具体用法?C++ UPrimitiveComponent::AddForceAtLocation怎么用?C++ UPrimitiveComponent::AddForceAtLocation使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类UPrimitiveComponent
的用法示例。
在下文中一共展示了UPrimitiveComponent::AddForceAtLocation方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: TickComponent
//.........这里部分代码省略.........
//BasePrimComp->AddForceAtLocation(FVector(DampingForce.X, DampingForce.Y, DampingForce.Z + BuoyancyForceZ), worldBoneLoc, BoneNames[Itr]);
}
//Apply fluid damping & clamp velocity
if (isUnderwater)
{
BI->SetLinearVelocity(-BI->GetUnrealWorldVelocity() * (FluidLinearDamping / 10), true);
BI->SetAngularVelocity(-BI->GetUnrealWorldAngularVelocity() * (FluidAngularDamping / 10), true);
//Clamp the velocity to MaxUnderwaterVelocity
if (ClampMaxVelocity && BI->GetUnrealWorldVelocity().Size() > MaxUnderwaterVelocity)
{
FVector Velocity = BI->GetUnrealWorldVelocity().GetSafeNormal() * MaxUnderwaterVelocity;
BI->SetLinearVelocity(Velocity, false);
}
}
if (DrawDebugPoints)
{
FColor DebugColor = FLinearColor(0.8, 0.7, 0.2, 0.8).ToRGBE();
if (isUnderwater) { DebugColor = FLinearColor(0, 0.2, 0.7, 0.8).ToRGBE(); } //Blue color underwater, yellow out of watter
DrawDebugSphere(World, worldBoneLoc, BoneTestRadius, 8, DebugColor);
}
}
}
return;
}
//--------------------------------------------------------
float TotalPoints = TestPoints.Num();
if (TotalPoints < 1) return;
int PointsUnderWater = 0;
for (int pointIndex = 0; pointIndex < TotalPoints; pointIndex++)
{
if (!TestPoints.IsValidIndex(pointIndex)) return; //Array size changed during runtime
bool isUnderwater = false;
FVector testPoint = TestPoints[pointIndex];
FVector worldTestPoint = BasePrimComp->GetComponentTransform().TransformPosition(testPoint);
FVector waveHeight = OceanManager->GetWaveHeightValue(worldTestPoint, World, !EnableWaveForces, TwoGerstnerIterations);
//Direction of radius (test radius is actually a Z offset, should probably rename it!). Just in case we need an upside down world.
float SignedRadius = FMath::Sign(BasePrimComp->GetPhysicsVolume()->GetGravityZ()) * TestPointRadius;
//If test point radius is below water surface, add buoyancy force.
if (waveHeight.Z > (worldTestPoint.Z + SignedRadius)
&& BasePrimComp->IsGravityEnabled()) //Buoyancy doesn't exist without gravity
{
PointsUnderWater++;
isUnderwater = true;
float DepthMultiplier = (waveHeight.Z - (worldTestPoint.Z + SignedRadius)) / (TestPointRadius * 2);
DepthMultiplier = FMath::Clamp(DepthMultiplier, 0.f, 1.f);
//If we have a point density override, use the overridden value instead of MeshDensity
float PointDensity = PointDensityOverride.IsValidIndex(pointIndex) ? PointDensityOverride[pointIndex] : MeshDensity;
/**
* --------
* Buoyancy force formula: (Volume(Mass / Density) * Fluid Density * -Gravity) / Total Points * Depth Multiplier
* --------
*/
float BuoyancyForceZ = BasePrimComp->GetMass() / PointDensity * FluidDensity * -Gravity / TotalPoints * DepthMultiplier;
//Experimental velocity damping using VelocityAtPoint.
FVector DampingForce = -GetUnrealVelocityAtPoint(BasePrimComp, worldTestPoint) * VelocityDamper * BasePrimComp->GetMass() * DepthMultiplier;
//Experimental xy wave force
if (EnableWaveForces)
{
DampingForce += BasePrimComp->GetMass() * FVector2D(waveHeight.X, waveHeight.Y).Size() * FVector(OceanManager->GlobalWaveDirection.X, OceanManager->GlobalWaveDirection.Y, 0) * WaveForceMultiplier / TotalPoints;
//float waveVelocity = FMath::Clamp(GetUnrealVelocityAtPoint(BasePrimComp, worldTestPoint).Z, -20.f, 150.f) * (1 - DepthMultiplier);
//DampingForce += OceanManager->GlobalWaveDirection * BasePrimComp->GetMass() * waveVelocity * WaveForceMultiplier / TotalPoints;
}
//Add force for this test point
BasePrimComp->AddForceAtLocation(FVector(DampingForce.X, DampingForce.Y, DampingForce.Z + BuoyancyForceZ), worldTestPoint);
}
if (DrawDebugPoints)
{
FColor DebugColor = FLinearColor(0.8, 0.7, 0.2, 0.8).ToRGBE();
if (isUnderwater) { DebugColor = FLinearColor(0, 0.2, 0.7, 0.8).ToRGBE(); } //Blue color underwater, yellow out of watter
DrawDebugSphere(World, worldTestPoint, TestPointRadius, 8, DebugColor);
}
}
//Clamp the velocity to MaxUnderwaterVelocity if there is any point underwater
if (ClampMaxVelocity && PointsUnderWater > 0
&& BasePrimComp->GetPhysicsLinearVelocity().Size() > MaxUnderwaterVelocity)
{
FVector Velocity = BasePrimComp->GetPhysicsLinearVelocity().GetSafeNormal() * MaxUnderwaterVelocity;
BasePrimComp->SetPhysicsLinearVelocity(Velocity);
}
//Update damping based on number of underwater test points
BasePrimComp->SetLinearDamping(_baseLinearDamping + FluidLinearDamping / TotalPoints * PointsUnderWater);
BasePrimComp->SetAngularDamping(_baseAngularDamping + FluidAngularDamping / TotalPoints * PointsUnderWater);
}
示例2: PerformWaveReaction
void UVaOceanBuoyancyComponent::PerformWaveReaction(float DeltaTime)
{
AActor* MyOwner = GetOwner();
if (!UpdatedComponent || MyOwner == NULL)
{
return;
}
UPrimitiveComponent* OldPrimitive = Cast<UPrimitiveComponent>(UpdatedComponent);
const FVector OldLocation = MyOwner->GetActorLocation();
const FRotator OldRotation = MyOwner->GetActorRotation();
const FVector OldLinearVelocity = OldPrimitive->GetPhysicsLinearVelocity();
const FVector OldAngularVelocity = OldPrimitive->GetPhysicsAngularVelocity();
const FVector OldCenterOfMassWorld = OldLocation + OldRotation.RotateVector(COMOffset);
const FVector OwnerScale = MyOwner->GetActorScale();
// XYZ === Throttle, Steering, Rise == Forwards, Sidewards, Upwards
FVector X, Y, Z;
GetAxes(OldRotation, X, Y, Z);
// Process tension dots and get torque from wind/waves
for (FVector TensionDot : TensionDots)
{
// Translate point to world coordinates
FVector TensionDotDisplaced = OldRotation.RotateVector(TensionDot + COMOffset);
FVector TensionDotWorld = OldLocation + TensionDotDisplaced;
// Get point depth
float DotAltitude = GetAltitude(TensionDotWorld);
// Don't process dots above water
if (DotAltitude > 0)
{
continue;
}
// Surface normal (not modified!)
FVector DotSurfaceNormal = GetSurfaceNormal(TensionDotWorld) * GetSurfaceWavesNum();
// Modify normal with real Z value and normalize it
DotSurfaceNormal.Z = GetOceanLevel(TensionDotWorld);
DotSurfaceNormal.Normalize();
// Point dynamic pressure [http://en.wikipedia.org/wiki/Dynamic_pressure]
// rho = 1.03f for ocean water
FVector WaveVelocity = GetWaveVelocity(TensionDotWorld);
float DotQ = 0.515f * FMath::Square(WaveVelocity.Size());
FVector WaveForce = FVector(0.0,0.0,1.0) * DotQ /* DotSurfaceNormal*/ * (-DotAltitude) * TensionDepthFactor;
// We don't want Z to be affected by DotQ
WaveForce.Z /= DotQ;
// Scale to DeltaTime to break FPS addiction
WaveForce *= DeltaTime;
// Apply actor scale
WaveForce *= OwnerScale.X;// *OwnerScale.Y * OwnerScale.Z;
OldPrimitive->AddForceAtLocation(WaveForce * Mass, TensionDotWorld);
}
// Static metacentric forces (can be useful on small waves)
if (bUseMetacentricForces)
{
FVector TensionTorqueResult = FVector(0.0f, 0.0f, 0.0f);
// Calc recovering torque (transverce)
FRotator RollRot = FRotator(0.0f, 0.0f, 0.0f);
RollRot.Roll = OldRotation.Roll;
FVector MetacenterDisplaced = RollRot.RotateVector(TransverseMetacenter + COMOffset);
TensionTorqueResult += X * FVector::DotProduct((TransverseMetacenter - MetacenterDisplaced),
FVector(0.0f, -1.0f, 0.0f)) * TensionTorqueRollFactor;
// Calc recovering torque (longitude)
FRotator PitchRot = FRotator(0.0f, 0.0f, 0.0f);
PitchRot.Pitch = OldRotation.Pitch;
MetacenterDisplaced = PitchRot.RotateVector(LongitudinalMetacenter + COMOffset);
TensionTorqueResult += Y * FVector::DotProduct((LongitudinalMetacenter - MetacenterDisplaced),
FVector(1.0f, 0.0f, 0.0f)) * TensionTorquePitchFactor;
// Apply torque
TensionTorqueResult *= DeltaTime;
TensionTorqueResult *= OwnerScale.X;// *OwnerScale.Y * OwnerScale.Z;
OldPrimitive->AddTorque(TensionTorqueResult);
}
}