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75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "Mechanics/SpatialCurveDistanceMechanic.h"
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#include "ToolSceneQueriesUtil.h"
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#include "SceneManagement.h"
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#include "DynamicMesh/MeshTransforms.h"
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#include "Distance/DistRay3Segment3.h"
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#include UE_INLINE_GENERATED_CPP_BY_NAME(SpatialCurveDistanceMechanic)
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using namespace UE::Geometry;
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void USpatialCurveDistanceMechanic::Setup(UInteractiveTool* ParentToolIn)
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{
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UInteractionMechanic::Setup(ParentToolIn);
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}
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void USpatialCurveDistanceMechanic::InitializePolyCurve(const TArray<FVector3d>& CurvePoints, const FTransform3d& TransformIn)
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{
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Curve = CurvePoints;
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Transform = TransformIn;
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for (int32 k = 0; k < Curve.Num(); ++k)
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{
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Curve[k] = TransformIn.TransformPosition(Curve[k]);
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}
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}
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void USpatialCurveDistanceMechanic::InitializePolyLoop(const TArray<FVector3d>& CurvePoints, const FTransform3d& TransformIn)
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{
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InitializePolyCurve(CurvePoints, TransformIn);
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Curve.Add(CurvePoints[0]);
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}
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void USpatialCurveDistanceMechanic::UpdateCurrentDistance(const FRay& WorldRay)
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{
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FVector3d RayNearest = FVector3d::ZeroVector;
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FVector3d CurveNearest = FVector3d::ZeroVector;
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FRay3d Ray(WorldRay);
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int NumV = Curve.Num() - 1;
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double MinDistSqr = TNumericLimits<double>::Max();
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for (int k = 0; k < NumV; ++k)
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{
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FDistRay3Segment3d Distance(Ray, FSegment3d(Curve[k], Curve[k + 1]));
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double DistSqr = Distance.GetSquared();
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if (DistSqr < MinDistSqr)
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{
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MinDistSqr = DistSqr;
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RayNearest = Distance.RayClosestPoint;
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CurveNearest = Distance.SegmentClosestPoint;
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}
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}
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CurrentDistance = FMathd::Sqrt(MinDistSqr);
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CurrentCurvePoint = CurveNearest;
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CurrentSpacePoint = RayNearest;
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}
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void USpatialCurveDistanceMechanic::Render(IToolsContextRenderAPI* RenderAPI)
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{
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FViewCameraState RenderCameraState = RenderAPI->GetCameraState();
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float PDIScale = RenderCameraState.GetPDIScalingFactor();
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FPrimitiveDrawInterface* PDI = RenderAPI->GetPrimitiveDrawInterface();
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FColor AxisColor(128, 128, 0);
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PDI->DrawLine(
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(FVector)CurrentCurvePoint, (FVector)CurrentSpacePoint,
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AxisColor, 1, 1.0f*PDIScale, 0.0f, true);
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}
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