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The previous code was drawing an octogonal shape which did not match the rectangular falloff in the lighting #rb Charles.DeRousiers, Patrick.Kelly [CL 14430645 by chris kulla in ue5-main branch]
97 lines
4.1 KiB
C++
97 lines
4.1 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "RectLightComponentVisualizer.h"
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#include "SceneManagement.h"
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#include "Components/RectLightComponent.h"
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void FRectLightComponentVisualizer::DrawVisualization( const UActorComponent* Component, const FSceneView* View, FPrimitiveDrawInterface* PDI )
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{
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if(View->Family->EngineShowFlags.LightRadius)
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{
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const URectLightComponent* RectLightComp = Cast<const URectLightComponent>(Component);
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if(RectLightComp != NULL)
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{
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FTransform LightTM = RectLightComp->GetComponentTransform();
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LightTM.RemoveScaling();
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// Draw light radius
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DrawWireSphereAutoSides(PDI, LightTM, FColor(200, 255, 255), RectLightComp->AttenuationRadius, SDPG_World);
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FBox Box(
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FVector( 0.0f, -0.5f * RectLightComp->SourceWidth, -0.5f * RectLightComp->SourceHeight ),
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FVector( 0.0f, 0.5f * RectLightComp->SourceWidth, 0.5f * RectLightComp->SourceHeight )
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);
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const FColor ElementColor(231, 239, 0, 255);
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auto DrawBarnRect = [&](const FVector& P0, const FVector& P1, const FVector& P2, const FVector& P3)
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{
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FVector TP0 = LightTM.TransformPosition(P0);
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FVector TP1 = LightTM.TransformPosition(P1);
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FVector TP2 = LightTM.TransformPosition(P2);
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FVector TP3 = LightTM.TransformPosition(P3);
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PDI->DrawLine(TP0, TP1, ElementColor, SDPG_World);
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PDI->DrawLine(TP1, TP2, ElementColor, SDPG_World);
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PDI->DrawLine(TP2, TP3, ElementColor, SDPG_World);
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PDI->DrawLine(TP3, TP0, ElementColor, SDPG_World);
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};
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const float BarnMaxAngle = GetRectLightBarnDoorMaxAngle();
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const float AngleRad = FMath::DegreesToRadians(FMath::Clamp(RectLightComp->BarnDoorAngle, 0.f, BarnMaxAngle));
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const float BarnDepth = FMath::Cos(AngleRad) * RectLightComp->BarnDoorLength;
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const float BarnExtent = FMath::Sin(AngleRad) * RectLightComp->BarnDoorLength;
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FVector Corners[8];
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// +SourceWidth
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{
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FVector P0(0.0f, +0.5f * RectLightComp->SourceWidth, -0.5f * RectLightComp->SourceHeight);
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FVector P1(0.0f, +0.5f * RectLightComp->SourceWidth, +0.5f * RectLightComp->SourceHeight);
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FVector P2(BarnDepth, +0.5f * RectLightComp->SourceWidth + BarnExtent, +0.5f * RectLightComp->SourceHeight + BarnExtent);
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FVector P3(BarnDepth, +0.5f * RectLightComp->SourceWidth + BarnExtent, -0.5f * RectLightComp->SourceHeight - BarnExtent);
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Corners[0] = P3;
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Corners[1] = P2;
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DrawBarnRect(P0, P1, P2, P3);
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}
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// +SourceHeight
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{
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FVector P0(0.0f, -0.5f * RectLightComp->SourceWidth, +0.5f * RectLightComp->SourceHeight);
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FVector P1(0.0f, +0.5f * RectLightComp->SourceWidth, +0.5f * RectLightComp->SourceHeight);
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FVector P2(BarnDepth, +0.5f * RectLightComp->SourceWidth + BarnExtent, +0.5f * RectLightComp->SourceHeight + BarnExtent);
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FVector P3(BarnDepth, -0.5f * RectLightComp->SourceWidth - BarnExtent, +0.5f * RectLightComp->SourceHeight + BarnExtent);
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Corners[2] = P2;
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Corners[3] = P3;
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DrawBarnRect(P0, P1, P2, P3);
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}
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// -SourceWidth
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{
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FVector P0(0.0f, -0.5f * RectLightComp->SourceWidth, -0.5f * RectLightComp->SourceHeight);
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FVector P1(0.0f, -0.5f * RectLightComp->SourceWidth, +0.5f * RectLightComp->SourceHeight);
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FVector P2(BarnDepth, -0.5f * RectLightComp->SourceWidth - BarnExtent, +0.5f * RectLightComp->SourceHeight + BarnExtent);
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FVector P3(BarnDepth, -0.5f * RectLightComp->SourceWidth - BarnExtent, -0.5f * RectLightComp->SourceHeight - BarnExtent);
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Corners[4] = P2;
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Corners[5] = P3;
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DrawBarnRect(P0, P1, P2, P3);
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}
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// -SourceHeight
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{
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FVector P0(0.0f, -0.5f * RectLightComp->SourceWidth, -0.5f * RectLightComp->SourceHeight);
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FVector P1(0.0f, +0.5f * RectLightComp->SourceWidth, -0.5f * RectLightComp->SourceHeight);
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FVector P2(BarnDepth, +0.5f * RectLightComp->SourceWidth + BarnExtent, -0.5f * RectLightComp->SourceHeight - BarnExtent);
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FVector P3(BarnDepth, -0.5f * RectLightComp->SourceWidth - BarnExtent, -0.5f * RectLightComp->SourceHeight - BarnExtent);
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Corners[6] = P3;
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Corners[7] = P2;
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DrawBarnRect(P0, P1, P2, P3);
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}
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DrawWireBox(PDI, LightTM.ToMatrixNoScale(), Box, ElementColor, SDPG_World);
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}
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}
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}
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