Make sure the edge is sharp at 0 smoothness

xray.js

@@ -417,12 +417,16 @@ function updateOverlay(points, clicked) {
         
             const gradient = overlayCtx.createRadialGradient(x, y, 0, x, y, Math.floor(radius * scale));
 
-            const maxOpacity = ease(0, 1 / (0.001 + softness / 100));
+            const maxOpacity = ease(0, 1 / (0.00001 + softness / 100));
             
-            for (let t=0 ; t <= 20; t+= 1) {
-                let eased = ease(t/20.0, 1 / (0.001 + softness / 100)) / maxOpacity;
-                gradient.addColorStop(t/20.0, `rgba(0, 0, 0, ${eased}`);
+            const steps = 20;
+            for (let t=0 ; t <= steps; t+= 1) {
+                let eased = ease(t/steps, 1 / (0.00001 + softness / 100)) / maxOpacity;
+                gradient.addColorStop(t/steps, `rgba(0, 0, 0, ${eased}`);
             }
+
+            let eased = ease(0.999, 1 / (0.00001 + softness / 100)) / maxOpacity;
+            gradient.addColorStop(0.999, `rgba(0, 0, 0, ${eased}`);
             overlayCtx.fillStyle = gradient;
         
             overlayCtx.fill();