From 8693a266c2c9a8448b70d87d487ed211c439cbc4 Mon Sep 17 00:00:00 2001
From: tom barrett <spalf0@gmail.com>
Date: Wed, 19 Jun 2019 04:45:46 -0500
Subject: camera now doesnt display unused map

---
 src/camera.rs | 32 +++++++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 7 deletions(-)

(limited to 'src/camera.rs')

diff --git a/src/camera.rs b/src/camera.rs
index 4ae0153..ed5a20a 100644
--- a/src/camera.rs
+++ b/src/camera.rs
@@ -1,23 +1,41 @@
 use ggez::nalgebra::Point2;
 use ggez::Context;
 
+use crate::constants;
+
 pub struct Camera {
     pub draw: Point2<f32>,
-    height: f32,
-    width: f32,
+    window_height: f32,
+    window_width: f32,
+    map_height: f32,
+    map_width: f32,
 }
 
 impl Camera {
-    pub fn new(context: &mut Context) -> Camera {
+    pub fn new(context: &mut Context, dimensions: (f32, f32)) -> Camera {
         Camera {
             draw: Point2::new(0.0, 0.0),
-            height: context.conf.window_mode.height,
-            width: context.conf.window_mode.width,
+            window_height: context.conf.window_mode.height,
+            window_width: context.conf.window_mode.width,
+            map_width: dimensions.0,
+            map_height: dimensions.1,
         }
     }
 
     pub fn give_center(&mut self, center: Point2<f32>) {
-        self.draw.x = (self.width / 2.0) - center.x;
-        self.draw.y = (self.height / 2.0) - center.y;
+        self.draw.x = ((self.window_width / 2.0) - center.x) - (constants::TILE_WIDTH);
+        self.draw.y = ((self.window_height / 2.0) - center.y) - (constants::TILE_HEIGHT);
+
+        if self.draw.x > 0.0 {
+            self.draw.x = 0.0;
+        } else if self.draw.x - self.window_width < -1.0 * self.map_width {
+            self.draw.x = -1.0 * (self.map_width - self.window_width);
+        }
+
+        if self.draw.y > 0.0 {
+            self.draw.y = 0.0;
+        } else if self.draw.y - self.window_height < -1.0 * self.map_height {
+            self.draw.y = -1.0 * (self.map_height - self.window_height);
+        }
     }
 }
-- 
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