don't draw player shadow over the death pit

src/bin/platformer/graphics.rs

@@ -348,7 +348,8 @@ impl Graphics {
 				
 				self.texture_white.bind ();
 				
-				if coll.t <= 1.0 {
+				// kill_z
+				if coll.t <= 1.0 && coll.p_impact.z > -3.0 {
 					let mvp = view_mat * 
 					Mat4::from_translation (coll.p_impact + Vec3::new (0.0, 0.0, 0.0625)) * 
 					Mat4::from_scale ((0.5, 0.5, 0.0).into ());