Added Android automatic shooting

core/src/io/anuke/mindustry/graphics/OverlayRenderer.java

@@ -31,7 +31,7 @@ public class OverlayRenderer {
             Shaders.outline.color.set(Palette.accent);
             Graphics.beginShaders(Shaders.outline);
 
-            input.drawBottom();
+            input.drawOutlined();
 
             Graphics.endShaders();
         }

core/src/io/anuke/mindustry/graphics/Trail.java

@@ -0,0 +1,53 @@
+package io.anuke.mindustry.graphics;
+
+import com.badlogic.gdx.graphics.Color;
+import com.badlogic.gdx.utils.FloatArray;
+import io.anuke.ucore.graphics.Draw;
+import io.anuke.ucore.graphics.Fill;
+import io.anuke.ucore.graphics.Lines;
+import io.anuke.ucore.util.Mathf;
+
+/**Class that renders a trail.*/
+public class Trail {
+    private final int length;
+
+    private FloatArray points = new FloatArray();
+
+    public Trail(int length){
+        this.length = length;
+    }
+
+    public void update(float curx, float cury){
+        points.add(curx, cury);
+
+        if(points.size > length*2) {
+            float[] items = points.items;
+            System.arraycopy(items, 2, items, 0, points.size - 2);
+            points.size -= 2;
+        }
+    }
+
+    public void draw(Color start, Color end, float stroke){
+
+        for(int i = 0; i < points.size - 2; i += 2){
+            float x = points.get(i);
+            float y = points.get(i + 1);
+            float x2 = points.get(i + 2);
+            float y2 = points.get(i + 3);
+            float s = Mathf.clamp((float)(i) / points.size);
+
+            Draw.color(start, end, s);
+
+            Lines.stroke(s * stroke);
+            Lines.line(x, y, x2, y2);
+        }
+
+        if(points.size >= 2){
+            Fill.circle(points.get(points.size-2), points.get(points.size-1), stroke/2f);
+        }
+
+        Draw.color(start);
+
+        Draw.reset();
+    }
+}