Add SpellOverlay class

2024-12-19 21:44:09 -05:00
parent 686c7d6c6c
commit 75fbfb97ba
8 changed files with 221 additions and 23 deletions
@@ -0,0 +1,62 @@
+// Fill out your copyright notice in the Description page of Project Settings.
+
+
+#include "SpellOverlay.h"
+#include "Rendering/DrawElements.h"
+
+int32
+USpellOverlay::NativePaint(const FPaintArgs& Args,
+						   const FGeometry& AllottedGeometry,
+						   const FSlateRect& MyCullingRect,
+						   FSlateWindowElementList& OutDrawElements,
+						   int32 LayerId,
+						   const FWidgetStyle& InWidgetStyle,
+						   bool bParentEnabled) const
+{
+	// Call the parent implementation
+	const int32 Layer = Super::NativePaint(Args,
+										   AllottedGeometry,
+										   MyCullingRect,
+										   OutDrawElements,
+										   LayerId,
+										   InWidgetStyle,
+										   bParentEnabled);
+
+	if (SpellPoints.Num() < 2)
+	{
+		return Layer;
+	}
+
+	TArray<FVector2d> LocalDrawPoints;
+	for (int32 i = 0; i < SpellPoints.Num(); i++)
+	{
+		LocalDrawPoints.Add(AllottedGeometry.LocalToAbsolute(SpellPoints[i]));
+	}
+
+	for (int32 i = 0; i < LocalDrawPoints.Num() - 1; ++i)
+	{
+		const FVector2D& StartPoint = LocalDrawPoints[i];
+		const FVector2D& EndPoint = LocalDrawPoints[i + 1];
+
+		FSlateDrawElement::MakeLines(
+			OutDrawElements,
+			Layer + 1,
+			AllottedGeometry.ToPaintGeometry(),
+			{StartPoint, EndPoint},
+			ESlateDrawEffect::None,
+			SpellLineColor,
+			bAntiAlias,
+			SpellLineThickness
+		);
+	}
+
+	return Layer + 1;
+}
+
+void
+USpellOverlay::UpdateSpellPoints(const TArray<FVector2D>& NewSpellPoints)
+{
+	this->SpellPoints = NewSpellPoints;
+	// Redraw the widget
+	Invalidate(EInvalidateWidgetReason::Paint);
+}