first attempt at merging sliders

src/itdelatrisu/opsu/objects/Slider.java

@@ -220,7 +220,7 @@ public class Slider extends GameObject {
 		curveColor.a = curveAlpha;
 
 		float curveInterval = Options.isSliderSnaking() ? alpha : 1f;
-		curve.draw(curveColor, curveInterval);
+		//curve.draw(curveColor, curveInterval);
 		color.a = alpha;
 
 		g.pushTransform();

src/itdelatrisu/opsu/objects/curves/Curve.java

@@ -62,6 +62,10 @@ public abstract class Curve {
 	/** Points along the curve (set by inherited classes). */
 	protected Vec2f[] curve;
 
+	public Vec2f[] getCurvePoints() {
+		return curve;
+	}
+
 	private Color fallbackSliderColor = new Color(20, 20, 20);
 
 	/**

src/itdelatrisu/opsu/states/Game.java

@@ -44,7 +44,9 @@ import itdelatrisu.opsu.objects.Slider;
 import itdelatrisu.opsu.objects.Spinner;
 import itdelatrisu.opsu.objects.curves.Curve;
 import itdelatrisu.opsu.objects.curves.Vec2f;
+import itdelatrisu.opsu.render.CurveRenderState;
 import itdelatrisu.opsu.render.FrameBufferCache;
+import itdelatrisu.opsu.render.KnorkeCurveRenderStuff;
 import itdelatrisu.opsu.replay.PlaybackSpeed;
 import itdelatrisu.opsu.replay.Replay;
 import itdelatrisu.opsu.replay.ReplayFrame;
@@ -52,9 +54,7 @@ import itdelatrisu.opsu.ui.*;
 import itdelatrisu.opsu.ui.animations.AnimationEquation;
 
 import java.io.File;
-import java.util.IdentityHashMap;
-import java.util.LinkedList;
-import java.util.Stack;
+import java.util.*;
 
 import org.lwjgl.input.Keyboard;
 import org.lwjgl.opengl.Display;
@@ -72,6 +72,7 @@ import org.newdawn.slick.state.transition.EasedFadeOutTransition;
 import org.newdawn.slick.state.transition.EmptyTransition;
 import org.newdawn.slick.state.transition.FadeInTransition;
 import yugecin.opsudance.*;
+import yugecin.opsudance.objects.curves.FakeCombinedCurve;
 import yugecin.opsudance.ui.SBOverlay;
 
 /**
@@ -281,6 +282,8 @@ public class Game extends BasicGameState {
 	private final Cursor mirrorCursor;
 	private final SBOverlay sbOverlay;
 
+	private FakeCombinedCurve knorkesliders;
+
 	public Game(int state) {
 		this.state = state;
 		mirrorCursor = new Cursor(true);
@@ -1453,6 +1456,15 @@ public class Game extends BasicGameState {
 			}
 			this.leadInTime += epiImgTime;
 			SoundController.mute(false);
+
+			// let's create knorkesliders
+			List<Vec2f> curvepoints = new ArrayList<>();
+			for (GameObject gameObject : gameObjects) {
+				if (gameObject.isSlider()) {
+					curvepoints.addAll(Arrays.asList(((Slider) gameObject).getCurve().getCurvePoints()));
+				}
+			}
+			knorkesliders = new FakeCombinedCurve(curvepoints.toArray(new Vec2f[curvepoints.size()]));
 		}
 
 
@@ -1495,12 +1507,26 @@ public class Game extends BasicGameState {
 			GameMod.loadModState(previousMods);
 	}
 
+	private float slidercurveFrom;
+	private float slidercurveTo;
+
+	public void setSlidercurveFrom(int slidercurveFrom) {
+		float pos = slidercurveFrom / knorkesliders.getCurvePoints().length;
+		this.slidercurveFrom = Math.min(pos, this.slidercurveFrom);
+	}
+
+	public void setSlidercurveTo(int slidercurveTo) {
+		float pos = slidercurveTo / knorkesliders.getCurvePoints().length;
+		this.slidercurveTo = Math.max(pos, this.slidercurveTo);
+	}
+
 	/**
 	 * Draws hit objects, hit results, and follow points.
 	 * @param g the graphics context
 	 * @param trackPosition the track position
 	 */
 	private void drawHitObjects(Graphics g, int trackPosition) {
+		knorkesliders.draw(Color.white, this.slidercurveFrom, this.slidercurveTo);
 		// include previous object in follow points
 		int lastObjectIndex = -1;
 		if (objectIndex > 0 && objectIndex < beatmap.objects.length &&

src/yugecin/opsudance/objects/curves/FakeCombinedCurve.java

@@ -0,0 +1,46 @@
+/*
+ * opsu!dance - fork of opsu! with cursordance auto
+ * Copyright (C) 2016 yugecin
+ *
+ * opsu!dance is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * opsu!dance is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with opsu!dance.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package yugecin.opsudance.objects.curves;
+
+import itdelatrisu.opsu.beatmap.HitObject;
+import itdelatrisu.opsu.objects.curves.Curve;
+import itdelatrisu.opsu.objects.curves.Vec2f;
+
+public class FakeCombinedCurve extends Curve {
+
+	public FakeCombinedCurve(Vec2f[] points) {
+		super(new HitObject(0, 0, 0), false);
+		this.curve = points;
+	}
+
+	@Override
+	public Vec2f pointAt(float t) {
+		return null;
+	}
+
+	@Override
+	public float getEndAngle() {
+		return 0;
+	}
+
+	@Override
+	public float getStartAngle() {
+		return 0;
+	}
+
+}