From 51eb5aa15ac50afa9cc1da3a951cf9c0a8f9469d Mon Sep 17 00:00:00 2001
From: Ivan Kuzmenko <6745157+rndtrash@users.noreply.github.com>
Date: Wed, 16 Aug 2023 20:46:41 +0300
Subject: [PATCH] Smoother camera

---
 scripts/GameCamera.cs | 88 +++++++++++++++++++++++--------------------
 1 file changed, 47 insertions(+), 41 deletions(-)

diff --git a/scripts/GameCamera.cs b/scripts/GameCamera.cs
index 2106ca0..556961f 100644
--- a/scripts/GameCamera.cs
+++ b/scripts/GameCamera.cs
@@ -2,48 +2,54 @@ using Godot;
 
 public partial class GameCamera : Camera2D
 {
-	[Export] public Player Player;
-	[Export] public Vector2 CameraBounds;
-	
-	/// <summary>
-	/// World position of the flashlight
-	/// </summary>
-	public Vector2 FlashlightPosition;
+    [Export] public Player Player;
+    [Export] public Vector2 CameraBounds = new(40, 30);
+    [Export] public Vector2 CameraFollowBounds = new(20, 10);
+    [Export] public float Speed = 0.5f;
 
-	public override void _PhysicsProcess(double delta)
-	{
-		var relativePlayerPosition = Player.Position - Position;
-		var halfCameraBounds = CameraBounds / 2;
-		float x = 0, y = 0;
-		if (relativePlayerPosition.X > halfCameraBounds.X)
-		{
-			x = relativePlayerPosition.X - halfCameraBounds.X;
-		}
-		else if (relativePlayerPosition.X < -halfCameraBounds.X)
-		{
-			x = relativePlayerPosition.X + halfCameraBounds.X;
-		}
-		if (relativePlayerPosition.Y > halfCameraBounds.Y)
-		{
-			y = relativePlayerPosition.Y - halfCameraBounds.Y;
-		}
-		else if (relativePlayerPosition.Y < -halfCameraBounds.Y)
-		{
-			y = relativePlayerPosition.Y + halfCameraBounds.Y;
-		}
+    /// <summary>
+    /// World position of the flashlight
+    /// </summary>
+    public Vector2 FlashlightPosition;
 
-		var difference = new Vector2(x, y);
-		Position += difference;
-		FlashlightPosition += difference;
-	}
+    public override void _PhysicsProcess(double delta)
+    {
+        var difference = Vector2.Zero;
 
-	public override void _Input(InputEvent @event)
-	{
-		base._Input(@event);
+        var relativePlayerPosition = Player.Position - Position;
+        var halfCameraBounds = CameraBounds / 2;
+        var halfCameraFollowBounds = CameraFollowBounds / 2;
+        var hardLimit = relativePlayerPosition.Clamp(-halfCameraBounds, halfCameraBounds);
+        difference = relativePlayerPosition - hardLimit;
+        GD.Print($"HardDiff {difference}");
+        if (difference.IsZeroApprox())
+        {
+            float x = 0, y = 0;
+            if (Mathf.Abs(relativePlayerPosition.X) >= halfCameraFollowBounds.X)
+            {
+                x = relativePlayerPosition.X * Speed * (float)delta;
+            }
 
-		if (@event is InputEventMouseMotion eventMouseMotion)
-		{
-			FlashlightPosition = eventMouseMotion.Position - Constants.HalfScreenSize + Position;
-		}
-	}
-}
+            if (Mathf.Abs(relativePlayerPosition.Y) > halfCameraFollowBounds.Y)
+            {
+                y = relativePlayerPosition.Y * Speed * (float)delta;
+            }
+
+            difference = new Vector2(x, y);
+            GD.Print($"SmoothDiff {difference}");
+        }
+
+        Position = (Position + difference).Round();
+        FlashlightPosition = (FlashlightPosition + difference).Round();
+    }
+
+    public override void _Input(InputEvent @event)
+    {
+        base._Input(@event);
+
+        if (@event is InputEventMouseMotion eventMouseMotion)
+        {
+            FlashlightPosition = eventMouseMotion.Position - Constants.HalfScreenSize + Position;
+        }
+    }
+}
\ No newline at end of file