make it work

src/yugecin/opsudance/Dancer.java

@@ -146,6 +146,9 @@ public class Dancer {
 	}
 
 	public void update(int time, GameObject p, GameObject c) {
+		GameObject[] e = sliderMoverController.process(p, c, time);
+		p = e[0];
+		c = e[1];
 		if (this.p != p) {
 			this.p = p;
 			if (this.p == d) {
@@ -154,7 +157,6 @@ public class Dancer {
 					c.start.set((float) spinnerStartPoint[0], (float) spinnerStartPoint[1]);
 				}
 			}
-			c = sliderMoverController.process(c);
 			isCurrentLazySlider = false;
 			// detect lazy sliders, should work pretty good
 			if (c.isSlider() && LAZY_SLIDERS && Utils.distance(c.start.x, c.start.y, c.end.x, c.end.y) <= Circle.diameter * 0.8f) {
@@ -175,12 +177,6 @@ public class Dancer {
 			mover = moverFactory.create(p, c, dir);
 		}
 
-		GameObject next = sliderMoverController.processNext(time);
-		if (next != null) {
-			update(time, c, next);
-			return;
-		}
-
 		if (time < c.getTime()) {
 			if (!p.isSpinner() || !c.isSpinner()) {
 				double[] point = mover.getPointAt(time);

src/yugecin/opsudance/movers/slidermovers/DefaultSliderMoverController.java

@@ -22,17 +22,16 @@ import itdelatrisu.opsu.objects.GameObject;
 public class DefaultSliderMoverController implements SliderMoverController {
 
 	@Override
-	public GameObject process(GameObject obj) {
-		return obj;
-	}
-
-	@Override
-	public GameObject processNext(int time) {
-		return null;
+	public GameObject[] process(GameObject p, GameObject c, int time) {
+		return new GameObject[] {
+			p,
+			c
+		};
 	}
 
 	@Override
 	public String toString() {
 		return "Nothing special, just follow it";
 	}
+
 }

src/yugecin/opsudance/movers/slidermovers/InheritedSliderMoverController.java

@@ -17,18 +17,41 @@
  */
 package yugecin.opsudance.movers.slidermovers;
 
+import itdelatrisu.opsu.objects.Circle;
 import itdelatrisu.opsu.objects.GameObject;
+import itdelatrisu.opsu.objects.Slider;
 
 public class InheritedSliderMoverController implements SliderMoverController {
 
-	@Override
-	public GameObject process(GameObject obj) {
-		return obj;
-	}
+	private GameObject currentSlider;
+	private Circle[] positions;
+	private int idx;
 
 	@Override
-	public GameObject processNext(int time) {
-		return null;
+	public GameObject[] process(GameObject p, GameObject c, int time) {
+		GameObject[] ret = new GameObject[2];
+		if (!c.isSlider()) {
+			ret[0] = p;
+			ret[1] = c;
+			return ret;
+		}
+		if (currentSlider != c) {
+			currentSlider = c;
+			positions = ((Slider) c).getTickPositionCircles();
+			idx = 0;
+		}
+		for (; idx < positions.length; idx++) {
+			if (time < positions[idx].getTime() || idx == positions.length - 1) {
+				ret[1] = positions[idx];
+				if (idx == 0) {
+					ret[0] = p;
+				} else {
+					ret[0] = positions[idx - 1];
+				}
+				return ret;
+			}
+		}
+		return null; // make the compiler happy c:
 	}
 
 	@Override

src/yugecin/opsudance/movers/slidermovers/SliderMoverController.java

@@ -21,7 +21,6 @@ import itdelatrisu.opsu.objects.GameObject;
 
 public interface SliderMoverController {
 
-	GameObject process(GameObject obj);
-	GameObject processNext(int time);
+	GameObject[] process(GameObject p, GameObject c, int time);
 
 }