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2b10993563
#jira UETOOL-3823 #rb brooke.hubert #preflight 6109d1e9b4288d0001acb7ef [CL 17055606 by michael balzer in ue5-main branch]
54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "BaseGizmos/AxisSources.h"
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#include "Components/SceneComponent.h"
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FVector UGizmoComponentAxisSource::GetOrigin() const
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{
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const FTransform& WorldTransform = Component->GetComponentToWorld();
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return WorldTransform.GetLocation();
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}
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FVector UGizmoComponentAxisSource::GetDirection() const
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{
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const FTransform& WorldTransform = Component->GetComponentToWorld();
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FVector Axis(0, 0, 0);
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Axis[FMath::Clamp(AxisIndex, 0, 2)] = 1.0;
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if (bLocalAxes)
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{
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return WorldTransform.GetRotation().RotateVector(Axis);
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}
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else
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{
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return Axis;
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}
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}
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void UGizmoComponentAxisSource::GetTangentVectors(FVector& TangentXOut, FVector& TangentYOut) const
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{
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// Note that in giving the tangent vectors, we need to give them in an order that
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// preserves the handedness of our coordinate system so that we can use the function
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// for generating planes in which we can measure rotation angles about the input axis.
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// So, TangentXOut, TangentYOut, and Input(Z) should give a left-handed frame (since
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// unreal is left handed).
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const FTransform& WorldTransform = Component->GetComponentToWorld();
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TangentXOut = FVector(0, 1, 0);
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TangentYOut = FVector(0, 0, 1);
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int Index = FMath::Clamp(AxisIndex, 0, 2);
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if (Index == 1)
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{
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TangentXOut = FVector(0, 0, 1);
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TangentYOut = FVector(1, 0, 0);
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}
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else if (Index == 2)
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{
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TangentXOut = FVector(1, 0, 0);
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TangentYOut = FVector(0, 1, 0);
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}
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if (bLocalAxes)
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{
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TangentXOut = WorldTransform.GetRotation().RotateVector(TangentXOut);
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TangentYOut = WorldTransform.GetRotation().RotateVector(TangentYOut);
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}
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} |