feat/teaser-prototype-playable-core (#1)

Co-authored-by: John Lamb <j.lamb13@gmail.com>
Reviewed-on: #1

Backyard CTF/Assets/Scripts/CameraController.cs

@@ -0,0 +1,187 @@
+using UnityEngine;
+using UnityEngine.InputSystem;
+
+public class CameraController : MonoBehaviour
+{
+    // Zoom settings
+    public float minZoom = 5f;
+    public float maxZoom = 25f;
+    public float zoomSpeed = 2f;
+    public float pinchZoomSpeed = 0.1f;
+
+    // Pan settings
+    public float panSpeed = 1f;
+
+    Camera cam;
+    Vector2 lastPanPosition;
+    bool isPanning;
+    float lastPinchDistance;
+    bool isPinching;
+
+    // Track if we started on a unit (don't pan if drawing route)
+    bool startedOnUnit;
+
+    void Start()
+    {
+        cam = Camera.main;
+    }
+
+    void Update()
+    {
+        HandleMouseInput();
+        HandleTouchInput();
+        ClampCameraPosition();
+    }
+
+    void HandleMouseInput()
+    {
+        var mouse = Mouse.current;
+        if (mouse == null) return;
+
+        // Scroll wheel zoom
+        float scroll = mouse.scroll.ReadValue().y;
+        if (Mathf.Abs(scroll) > 0.01f)
+        {
+            Zoom(-scroll * zoomSpeed * Time.deltaTime * 10f);
+        }
+
+        // Right-click pan (left-click is for route drawing)
+        if (mouse.rightButton.wasPressedThisFrame)
+        {
+            lastPanPosition = mouse.position.ReadValue();
+            isPanning = true;
+        }
+        else if (mouse.rightButton.wasReleasedThisFrame)
+        {
+            isPanning = false;
+        }
+
+        if (isPanning && mouse.rightButton.isPressed)
+        {
+            Vector2 currentPos = mouse.position.ReadValue();
+            Vector2 delta = currentPos - lastPanPosition;
+            Pan(-delta);
+            lastPanPosition = currentPos;
+        }
+    }
+
+    void HandleTouchInput()
+    {
+        var touch = Touchscreen.current;
+        if (touch == null) return;
+
+        int touchCount = 0;
+        foreach (var t in touch.touches)
+        {
+            if (t.press.isPressed) touchCount++;
+        }
+
+        if (touchCount == 2)
+        {
+            // Two finger pinch zoom and pan
+            var touch0 = touch.touches[0];
+            var touch1 = touch.touches[1];
+
+            Vector2 pos0 = touch0.position.ReadValue();
+            Vector2 pos1 = touch1.position.ReadValue();
+            float currentDistance = Vector2.Distance(pos0, pos1);
+
+            if (!isPinching)
+            {
+                isPinching = true;
+                lastPinchDistance = currentDistance;
+                lastPanPosition = (pos0 + pos1) / 2f;
+            }
+            else
+            {
+                // Pinch zoom
+                float deltaDistance = lastPinchDistance - currentDistance;
+                Zoom(deltaDistance * pinchZoomSpeed);
+                lastPinchDistance = currentDistance;
+
+                // Two-finger pan
+                Vector2 currentCenter = (pos0 + pos1) / 2f;
+                Vector2 delta = currentCenter - lastPanPosition;
+                Pan(-delta);
+                lastPanPosition = currentCenter;
+            }
+
+            isPanning = false; // Don't single-finger pan while pinching
+        }
+        else if (touchCount == 1)
+        {
+            isPinching = false;
+
+            var primaryTouch = touch.primaryTouch;
+            Vector2 touchPos = primaryTouch.position.ReadValue();
+
+            // Check if touch started on a unit
+            if (primaryTouch.press.wasPressedThisFrame)
+            {
+                Vector2 worldPos = cam.ScreenToWorldPoint(touchPos);
+                var hit = Physics2D.OverlapPoint(worldPos);
+                startedOnUnit = hit != null && hit.GetComponent<Unit>() != null;
+
+                if (!startedOnUnit)
+                {
+                    lastPanPosition = touchPos;
+                    isPanning = true;
+                }
+            }
+            else if (primaryTouch.press.wasReleasedThisFrame)
+            {
+                isPanning = false;
+                startedOnUnit = false;
+            }
+
+            // Single finger pan (only if not drawing route)
+            if (isPanning && !startedOnUnit && primaryTouch.press.isPressed)
+            {
+                Vector2 delta = touchPos - lastPanPosition;
+                Pan(-delta);
+                lastPanPosition = touchPos;
+            }
+        }
+        else
+        {
+            isPinching = false;
+            isPanning = false;
+        }
+    }
+
+    void Zoom(float delta)
+    {
+        float newSize = cam.orthographicSize + delta;
+        cam.orthographicSize = Mathf.Clamp(newSize, minZoom, maxZoom);
+    }
+
+    void Pan(Vector2 screenDelta)
+    {
+        // Convert screen delta to world delta
+        float worldUnitsPerPixel = cam.orthographicSize * 2f / Screen.height;
+        Vector3 worldDelta = new Vector3(
+            screenDelta.x * worldUnitsPerPixel * panSpeed,
+            screenDelta.y * worldUnitsPerPixel * panSpeed,
+            0
+        );
+
+        cam.transform.position += worldDelta;
+    }
+
+    void ClampCameraPosition()
+    {
+        // Keep camera within map bounds (with some padding for zoom)
+        float halfHeight = cam.orthographicSize;
+        float halfWidth = halfHeight * cam.aspect;
+
+        float minX = -Game.MapWidth / 2f + halfWidth;
+        float maxX = Game.MapWidth / 2f - halfWidth;
+        float minY = -Game.MapHeight / 2f + halfHeight;
+        float maxY = Game.MapHeight / 2f - halfHeight;
+
+        Vector3 pos = cam.transform.position;
+        pos.x = Mathf.Clamp(pos.x, minX, maxX);
+        pos.y = Mathf.Clamp(pos.y, minY, maxY);
+        cam.transform.position = pos;
+    }
+}