diff --git a/src/doodad.rs b/src/doodad.rs
index a2cdd63..feb735d 100644
--- a/src/doodad.rs
+++ b/src/doodad.rs
@@ -1,6 +1,3 @@
-use sdl2::gfx::primitives::DrawRenderer;
-use sdl2::pixels::Color;
-
 use crate::DrawContext;
 use crate::Drawable;
 use crate::SpriteAtlas;
@@ -19,11 +16,6 @@ impl Drawable for Doodad {
 		let sprite = sa.get(&self.sprite);
 		sprite.draw(dc.canvas, pos, self.angle, 1.0)?;
 
-		let p = self.pos.screen_position_real(dc);
-		dc.canvas
-			.aa_circle(p.x as i16, p.y as i16, 5, Color::RGB(255, 0, 0))?;
-		dc.canvas.set_draw_color(Color::RGB(0, 0, 0));
-
 		return Ok(());
 	}
 }
diff --git a/src/physics/cartesian.rs b/src/physics/cartesian.rs
index ceb4aea..fb8f2c7 100644
--- a/src/physics/cartesian.rs
+++ b/src/physics/cartesian.rs
@@ -10,6 +10,12 @@ impl Cartesian {
 	pub fn new(x: f64, y: f64) -> Self {
 		Cartesian { x, y }
 	}
+
+	/*
+	pub fn norm(&self) -> f64 {
+		return (self.x * self.x + self.y * self.y).sqrt();
+	}
+	*/
 }
 
 impl From<(u32, u32)> for Cartesian {
diff --git a/src/physics/worldposition.rs b/src/physics/worldposition.rs
index 09e44e0..bb42704 100644
--- a/src/physics/worldposition.rs
+++ b/src/physics/worldposition.rs
@@ -13,45 +13,32 @@ impl WorldPosition {
 		WorldPosition { pos: pos, par }
 	}
 
+	/*
 	fn from_screen_position(dc: &DrawContext, pos: Cartesian, par: f64) -> Self {
 		WorldPosition {
 			par,
 			pos: ((pos * Cartesian::new(1.0, -1.0)) + dc.top_left) * par + dc.camera.pos,
 		}
 	}
+	*/
 
-	/// Get the position of this drawable on the screen
-	/// (0, 0) is at top-left corner.
-	///
+	/// Transform this world coordinate into a position on the screen,
+	/// taking parallax into account. (0, 0) is at top-left corner.
 	/// Returned position is this object's center.
 	pub fn screen_position(&self, dc: &DrawContext) -> Cartesian {
 		let par = self.par;
-		let pos: Cartesian = self.pos.into();
+		let pos: Cartesian = self.pos;
 		return (((pos - dc.camera.pos) / par) - dc.top_left) * Cartesian::new(1.0, -1.0);
 	}
 
-	/// Get the position of this drawable on the screen
-	/// (0, 0) is at top-left corner.
-	///
-	/// Returned position is this object's center.
+	/*
+	/// Transform this world coordinate into a position on the screen, ignoring parallax.
+	/// Used for debugging.
 	pub fn screen_position_real(&self, dc: &DrawContext) -> Cartesian {
-		let pos: Cartesian = self.pos.into();
+		let pos: Cartesian = self.pos;
 		return ((pos - dc.camera.pos) - dc.top_left) * Cartesian::new(1.0, -1.0);
 	}
-
-	/// Is this object on screen?
-	fn on_screen(&self, dc: &DrawContext) -> bool {
-		let pos = self.screen_position(dc);
-		let (width, height) = (10, 10); //TODO: actual
-
-		// Don't draw if we're not on the screen.
-		// An offset is included to ensure we're completely
-		// off the screen. We add the whole width intentionally.
-		return !(pos.x < -1.0 * (width as f64)
-			|| pos.x > dc.window_size.x + width as f64
-			|| pos.y < -1.0 * (height as f64)
-			|| pos.y > dc.window_size.y + height as f64);
-	}
+	*/
 }
 
 impl Into<Cartesian> for WorldPosition {
diff --git a/src/sprite.rs b/src/sprite.rs
index 073a140..3a99f9f 100644
--- a/src/sprite.rs
+++ b/src/sprite.rs
@@ -60,17 +60,6 @@ impl<'a> Sprite<'a> {
 			false,
 		)?;
 
-		/*
-		canvas.set_draw_color(Color::RGB(255, 0, 0));
-		canvas.aa_circle(
-			position.x as i16,
-			position.y as i16,
-			5,
-			Color::RGB(255, 0, 0),
-		)?;
-		canvas.set_draw_color(Color::RGB(0, 0, 0));
-		*/
-
 		return Ok(());
 	}
 }