save

2026-01-31 23:24:13 +02:00
parent be0c819c8b
commit 12c1360ae7
58 changed files with 1902 additions and 238 deletions
@@ -0,0 +1,69 @@
+using System;
+using Godot;
+
+public partial class CameraController : Camera2D
+{
+    [Export] public float ZoomStep = 0.1f;
+    [Export] public float MinZoom = 0.5f;
+    [Export] public float MaxZoom = 3.0f;
+
+    [Export] private float minX = 0f;
+    [Export] private float maxX = 0f;
+    [Export] private float minY = 0f;
+    [Export] private float maxY = 0f;
+    
+    private bool _dragging;
+    private Vector2 _grabWorldPos;
+
+    public override void _Input(InputEvent @event)
+    {
+        // Middle mouse drag
+        if (@event is InputEventMouseButton mb)
+        {
+            if (mb.ButtonIndex == MouseButton.Middle)
+            {
+                _dragging = mb.Pressed;
+
+                if (_dragging)
+                    _grabWorldPos = GetGlobalMousePosition();
+            }
+
+            // Scroll zoom
+            if (mb.Pressed &&
+                (mb.ButtonIndex == MouseButton.WheelUp ||
+                 mb.ButtonIndex == MouseButton.WheelDown))
+            {
+                Vector2 mouseBeforeZoom = GetGlobalMousePosition();
+
+                float zoomFactor = mb.ButtonIndex == MouseButton.WheelUp
+                    ? -ZoomStep
+                    : ZoomStep;
+
+                float newZoom = Mathf.Clamp(Zoom.X + zoomFactor, MinZoom, MaxZoom);
+                Zoom = new Vector2(newZoom, newZoom);
+
+                // keep cursor locked to same world point
+                Vector2 mouseAfterZoom = GetGlobalMousePosition();
+                GlobalPosition += mouseBeforeZoom - mouseAfterZoom;
+                ClampPos();
+            }
+        }
+
+        if (_dragging && @event is InputEventMouseMotion)
+        {
+            Vector2 currentWorld = GetGlobalMousePosition();
+            GlobalPosition += _grabWorldPos - currentWorld;
+            ClampPos();
+        }
+    }
+
+    private void ClampPos()
+    {
+        var t = GetCanvasTransform();
+        var camrect = t.AffineInverse().BasisXform(GetViewportRect().Size);
+        GlobalPosition = new Vector2(
+            Mathf.Clamp(GlobalPosition.X, LimitLeft + camrect.X / 2, LimitRight - camrect.X / 2),
+            Mathf.Clamp(GlobalPosition.Y, LimitTop + camrect.Y / 2, LimitBottom - camrect.Y / 2)
+        );
+    }
+}