From 14db88a6a76a62c0ec83515761bdca54af20e3f5 Mon Sep 17 00:00:00 2001
From: Jakob Meier <comcloudway@ccw.icu>
Date: Sat, 25 Feb 2023 20:31:12 +0100
Subject: [PATCH] Added mouse-wheel camera move gesture

---
 src/screens/build.rs | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

diff --git a/src/screens/build.rs b/src/screens/build.rs
index 7c7a2fe..924b0c6 100644
--- a/src/screens/build.rs
+++ b/src/screens/build.rs
@@ -63,7 +63,8 @@ pub struct BuildScreen {
     grid: HashMap<Pos3, (Block, Direction)>,
     cam: Camera,
     show_inv: bool,
-    inv: Inventory
+    inv: Inventory,
+    mouse_position: Option<(f32, f32)>
 }
 impl BuildScreen {
     pub fn new() -> Self {
@@ -80,7 +81,8 @@ impl BuildScreen {
             grid: HashMap::new(),
             cam: Camera::new(),
             show_inv: false,
-            inv: Inventory::new()
+            inv: Inventory::new(),
+            mouse_position: None
         };
 
         this.grid.insert(Pos3::new(0, 0, 0), (Block::default(), Direction::North));
@@ -396,10 +398,10 @@ impl GameComponent for BuildScreen {
 
         // keyboard control
         if is_key_down(KeyCode::Down) {
-            self.cam.center.y += 1.0 * (1.0/self.cam.scale);
+            self.cam.center.y -= 1.0 * (1.0/self.cam.scale);
         }
         if is_key_down(KeyCode::Up) {
-            self.cam.center.y -= 1.0 * (1.0/self.cam.scale);
+            self.cam.center.y += 1.0 * (1.0/self.cam.scale);
         }
         if is_key_down(KeyCode::Left) {
             self.cam.center.x += 1.0 * (1.0/self.cam.scale);
@@ -407,6 +409,24 @@ impl GameComponent for BuildScreen {
         if is_key_down(KeyCode::Right) {
             self.cam.center.x -= 1.0 * (1.0/self.cam.scale);
         }
+        if is_key_down(KeyCode::C) {
+            self.cam.center = CVec2::new(0.0, 0.0);
+        }
+        if is_mouse_button_down(MouseButton::Middle) {
+            let (nx, ny) = mouse_position();
+            if let Some((ox, oy)) = self.mouse_position {
+
+                let dx = nx - ox;
+                let dy = ny - oy;
+
+                self.cam.center.x += dx;
+                self.cam.center.y += dy;
+            }
+            self.mouse_position = Some((nx, ny));
+        }
+        if is_mouse_button_released(MouseButton::Middle) {
+            self.mouse_position = None;
+        }
 
         // change block direction
         if is_key_pressed(KeyCode::W) {
-- 
2.38.5