1 files changed, 23 insertions, 1 deletions
diff --git a/evc/src/debug.rs b/evc/src/debug.rs
index 7b27b83..cbc598e 100644
--- a/evc/src/debug.rs
+++ b/evc/src/debug.rs
@@ -1,4 +1,4 @@
-use crate::{frame::Frame, pixel::Pixel, view::View};
+use crate::{frame::Frame, pixel::Pixel, vec2::Vec2, view::View};
 
 impl View<&mut Frame> {
     pub fn draw_box(&mut self, color: Pixel) {
@@ -14,6 +14,28 @@ impl View<&mut Frame> {
         }
     }
 }
+
+impl Frame {
+    pub fn draw_line(&mut self, start: Vec2, end: Vec2, color: Pixel) {
+        let (sx, sy) = (start.x as f32, start.y as f32);
+        let (ex, ey) = (end.x as f32, end.y as f32);
+        let (dx, dy) = (ex - sx, ey - sy);
+        let len = (dx * dx + dy * dy).sqrt();
+        let (nx, ny) = (dx / len, dy / len);
+        let (mut cx, mut cy) = (sx, sy);
+        let mut lc = 0.0;
+        while lc < len {
+            self[Vec2 {
+                x: cx as isize,
+                y: cy as isize,
+            }] = color;
+            lc += 0.5;
+            cx += nx * 0.5;
+            cy += ny * 0.5;
+        }
+    }
+}
+
 impl Pixel {
     pub const RED: Pixel = Pixel { r: 255, g: 0, b: 0 };
     pub const GREEN: Pixel = Pixel { r: 0, g: 255, b: 0 };