130 lines
3.8 KiB
C++
130 lines
3.8 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "DragTool_ViewportChange.h"
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#include "CanvasItem.h"
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#include "LevelEditorViewport.h"
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#include "ILevelEditor.h"
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#include "CanvasTypes.h"
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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//
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// FDragTool_ViewportChange
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//
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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FDragTool_ViewportChange::FDragTool_ViewportChange(FLevelEditorViewportClient* InLevelViewportClient)
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: FDragTool(InLevelViewportClient->GetModeTools()), LevelViewportClient(InLevelViewportClient), ViewOption(LVT_Perspective), ViewOptionOffset(FVector2D(0.f, 0.f))
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{
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bUseSnapping = true;
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bConvertDelta = false;
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}
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void FDragTool_ViewportChange::StartDrag(FEditorViewportClient* InViewportClient, const FVector& InStart, const FVector2D& InStartScreen)
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{
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FDragTool::StartDrag(InViewportClient, InStart, InStartScreen);
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FIntPoint MousePos;
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InViewportClient->Viewport->GetMousePos(MousePos);
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Start = FVector(InStartScreen.X, InStartScreen.Y, 0);
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End = EndWk = Start;
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}
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void FDragTool_ViewportChange::EndDrag()
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{
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ViewOptionOffset.X = End.X - Start.X;
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ViewOptionOffset.Y = End.Y - Start.Y;
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if (ViewOptionOffset.Y == 0)
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{
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if (ViewOptionOffset.X == 0)
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{
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ViewOption = LVT_Perspective;
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}
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else if (ViewOptionOffset.X > 0)
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{
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ViewOption = LVT_OrthoNegativeYZ; // Right
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}
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else
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{
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ViewOption = LVT_OrthoYZ; // Left
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}
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}
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else
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{
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float OffsetRatio = ViewOptionOffset.X / ViewOptionOffset.Y;
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float DragAngle = FMath::RadiansToDegrees(FMath::Atan(OffsetRatio));
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if (ViewOptionOffset.Y >= 0)
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{
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if (DragAngle >= -15.f && DragAngle <= 15.f)
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{
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ViewOption = LVT_OrthoNegativeXY; // Bottom
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}
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else if (DragAngle > 75.f)
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{
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ViewOption = LVT_OrthoNegativeYZ; // Right
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}
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else if (DragAngle < -75.f)
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{
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ViewOption = LVT_OrthoYZ; // Left
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}
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}
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else
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{
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if (DragAngle >= -15.f && DragAngle < 15.f)
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{
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ViewOption = LVT_OrthoXY; // Top
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}
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else if (DragAngle >= 15.f && DragAngle < 75.f)
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{
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ViewOption = LVT_OrthoXZ; // Front
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}
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else if (DragAngle >= -75.f && DragAngle < -15.f)
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{
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ViewOption = LVT_OrthoNegativeXZ; // Back
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}
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else if (DragAngle >= 75.f)
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{
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ViewOption = LVT_OrthoYZ; // Left
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}
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else if (DragAngle <= -75.f)
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{
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ViewOption = LVT_OrthoNegativeYZ; // Right
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}
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}
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}
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float OffsetLength = FMath::RoundToFloat((End - Start).Size());
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if (OffsetLength >= 125.15f)
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{
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LevelViewportClient->SetViewportTypeFromTool(ViewOption);
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return;
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}
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if (LevelViewportClient->ParentLevelEditor.IsValid())
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{
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LevelViewportClient->ParentLevelEditor.Pin()->SummonLevelViewportViewOptionMenu(ViewOption);
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}
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}
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void FDragTool_ViewportChange::AddDelta(const FVector& InDelta)
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{
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FDragTool::AddDelta(InDelta);
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FIntPoint MousePos;
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LevelViewportClient->Viewport->GetMousePos(MousePos);
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EndWk = FVector(MousePos);
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End = EndWk;
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ViewOptionOffset.X = End.X - Start.X;
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ViewOptionOffset.Y = End.Y - Start.Y;
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}
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void FDragTool_ViewportChange::Render(const FSceneView* View, FCanvas* Canvas)
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{
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FCanvasLineItem LineItem(Start, End);
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Canvas->DrawItem(LineItem);
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}
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