add visuals and camera - chapter 5

2024-01-29 01:55:12 +01:00
parent 6e7ab861c9
commit c4e1455148
6 changed files with 191 additions and 21 deletions
@@ -2,7 +2,7 @@ pub use crate::prelude::*;

 const NUM_TILES: usize = (SCREEN_WIDTH * SCREEN_HEIGHT) as usize;

-#[derive(Copy, Clone, PartialEq)]
+#[derive(Copy, Clone, PartialEq, Debug)]
 pub enum TileType {
    Floor,
    Wall,
@@ -39,16 +39,33 @@ impl Map {
        }
    }
    
-    pub fn render(&self, ctx: &mut BTerm) {
-        for y in 0..SCREEN_HEIGHT {
-            for x in 0..SCREEN_WIDTH {
-                let idx = map_idx(x, y);
-                match self.tiles[idx] {
-                    TileType::Floor => {
-                        ctx.set(x, y, YELLOW, BLACK, to_cp437('.'));
-                    }
-                    TileType::Wall => {
-                        ctx.set(x, y, GREEN, BLACK, to_cp437('#'));
+    pub fn render(&self, ctx: &mut BTerm, camera: &Camera) {
+        ctx.set_active_console(0);
+
+        for y in camera.top_y..camera.bottom_y {
+            for x in camera.left_x..camera.right_x {
+                if self.in_bounds(Point::new(x, y)) {
+                    let idx = map_idx(x, y);
+
+                    match self.tiles[idx] {
+                        TileType::Wall => {
+                            ctx.set(
+                                x - camera.left_x,
+                                y - camera.top_y,
+                                WHITE,
+                                BLACK,
+                                to_cp437('#'),
+                            );
+                        }
+                        TileType::Floor => {
+                            ctx.set(
+                                x - camera.left_x,
+                                y - camera.top_y,
+                                WHITE,
+                                BLACK,
+                                to_cp437('.'),
+                            );
+                        }
                    }
                }
            }