add options for slider styles and make it all work

src/itdelatrisu/opsu/GameData.java

@@ -913,7 +913,9 @@ public class GameData {
 						float oldColorAlpha = hitResult.color.a;
 						Colors.WHITE_FADE.a = alpha;
 						hitResult.color.a = alpha;
-						//hitResult.curve.draw(hitResult.color);
+						if (!Options.isShrinkingSliders()) {
+							hitResult.curve.draw(hitResult.color);
+						}
 						Colors.WHITE_FADE.a = oldWhiteAlpha;
 						hitResult.color.a = oldColorAlpha;
 					}

src/itdelatrisu/opsu/Options.java

@@ -502,7 +502,14 @@ public class Options {
 		FORCE_DEFAULT_PLAYFIELD ("Force Default Playfield", "ForceDefaultPlayfield", "Override the song background with the default playfield background.", false),
 		IGNORE_BEATMAP_SKINS ("Ignore All Beatmap Skins", "IgnoreBeatmapSkins", "Never use skin element overrides provided by beatmaps.", false),
 		SNAKING_SLIDERS ("Snaking sliders", "SnakingSliders", "Sliders gradually snake out from their starting point.", true),
+		SHRINKING_SLIDERS ("Shrinking sliders", "ShrinkingSliders", "Sliders shrinks when sliderball passes - unstable!", false),
 		FALLBACK_SLIDERS ("Fallback sliders", "FallbackSliders", "Enable this if sliders won't render", false),
+		MERGING_SLIDERS ("Merging sliders", "MergingSliders", "Merge sliders (aka knorkesliders) - unstable!", false) {
+			@Override
+			public boolean showCondition() {
+				return !FALLBACK_SLIDERS.bool;
+			}
+		},
 		SHOW_HIT_LIGHTING ("Show Hit Lighting", "HitLighting", "Adds an effect behind hit explosions.", true),
 		SHOW_COMBO_BURSTS ("Show Combo Bursts", "ComboBurst", "A character image is displayed at combo milestones.", true),
 		SHOW_PERFECT_HIT ("Show Perfect Hits", "PerfectHit", "Whether to show perfect hit result bursts (300s, slider ticks).", true),
@@ -1775,6 +1782,9 @@ public class Options {
 
 	public static boolean isFallbackSliders() { return GameOption.FALLBACK_SLIDERS.getBooleanValue(); }
 
+	public static boolean isShrinkingSliders() { return GameOption.SHRINKING_SLIDERS.getBooleanValue(); }
+	public static boolean isMergingSliders() { return !isFallbackSliders() && GameOption.MERGING_SLIDERS.getBooleanValue(); }
+
 	/**
 	 * Returns the fixed circle size override, if any.
 	 * @return the CS value (0, 10], 0f if disabled

src/itdelatrisu/opsu/objects/Slider.java

@@ -195,6 +195,9 @@ public class Slider extends GameObject {
 
 	@Override
 	public void draw(Graphics g, int trackPosition, boolean mirror) {
+		if (trackPosition > getEndTime()) {
+			return;
+		}
 		Color orig = color;
 		if (mirror) {
 			color = mirrorColor;
@@ -219,15 +222,9 @@ public class Slider extends GameObject {
 		if (GameMod.HIDDEN.isActive() && trackPosition > getTime()) {
 			curveAlpha = Math.max(0f, 1f - ((float) (trackPosition - getTime()) / (getEndTime() - getTime())) * 1.05f);
 		}
-		curveColor.a = curveAlpha;
 
-		float curveInterval = Options.isSliderSnaking() ? alpha : 1f;
+		curveColor.a = curveAlpha;
-		//curve.draw(curveColor, curveInterval);
+		boolean isCurveCompletelyDrawn = drawSliderTrack(trackPosition, alpha);
-		float sliderprogress = (float) (trackPosition - getTime()) / sliderTimeTotal;
-		if (sliderprogress > 0) {
-			game.setSlidercurveFrom(baseSliderFrom + (int) (sliderprogress * curve.getCurvePoints().length));
-		}
-		game.setSlidercurveTo(baseSliderFrom + (int) (curveInterval * curve.getCurvePoints().length));
 		color.a = alpha;
 
 		g.pushTransform();
@@ -292,7 +289,7 @@ public class Slider extends GameObject {
 		g.popTransform();
 
 		// repeats
-		if (curveInterval == 1.0f) {
+		if (isCurveCompletelyDrawn) {
 			for (int tcurRepeat = currentRepeats; tcurRepeat <= currentRepeats + 1; tcurRepeat++) {
 				if (hitObject.getRepeatCount() - 1 > tcurRepeat) {
 					Image arrow = GameImage.REVERSEARROW.getImage();
@@ -376,6 +373,26 @@ public class Slider extends GameObject {
 		color = orig;
 	}
 
+	private boolean drawSliderTrack(int trackPosition, float snakingSliderProgress) {
+		float curveIntervalTo = Options.isSliderSnaking() ? snakingSliderProgress : 1f;
+		float curveIntervalFrom = 0f;
+		if (Options.isShrinkingSliders()) {
+			float sliderprogress = (float) (trackPosition - getTime()) / sliderTimeTotal;
+			if (sliderprogress > 0) {
+				curveIntervalFrom = sliderprogress;
+			}
+		}
+		if (Options.isMergingSliders()) {
+			if (Options.isShrinkingSliders() && curveIntervalFrom > 0) {
+				game.setSlidercurveFrom(baseSliderFrom + (int) (curveIntervalFrom * curve.getCurvePoints().length));
+			}
+			game.setSlidercurveTo(baseSliderFrom + (int) (curveIntervalTo * curve.getCurvePoints().length));
+		} else {
+			curve.draw(curveColor, curveIntervalFrom, curveIntervalTo);
+		}
+		return curveIntervalTo == 1f;
+	}
+
 	/**
 	 * Calculates the slider hit result.
 	 * @return the hit result (GameData.HIT_* constants)
@@ -557,7 +574,9 @@ public class Slider extends GameObject {
 
 			// calculate and send slider result
 			hitResult();
+			if (Options.isMergingSliders()) {
 				game.setSlidercurveFrom(baseSliderFrom + curve.getCurvePoints().length);
+			}
 			return true;
 		}
 

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

@@ -126,7 +126,8 @@ public abstract class Curve {
 	/**
 	 * Draws the curve in the range [0, t] (where the full range is [0, 1]) to the graphics context.
 	 * @param color the color filter
-	 * @param t set the curve interval to [0, t]
+	 * @param t1 interval to draw from
+	 * @param t2 interval to draw to
 	 */
 	public void draw(Color color, float t1, float t2) {
 		if (curve == null)
@@ -145,7 +146,7 @@ public abstract class Curve {
 				hitCircleOverlay.drawCentered(curve[i].x, curve[i].y, Colors.WHITE_FADE);
 			float a = fallbackSliderColor.a;
 			fallbackSliderColor.a = color.a;
-			for (int i = 0; i < drawUpTo; i++)
+			for (int i = drawFrom; i < drawUpTo; i++)
 				hitCircle.drawCentered(curve[i].x, curve[i].y, fallbackSliderColor);
 			fallbackSliderColor.a = a;
 		}
@@ -154,7 +155,7 @@ public abstract class Curve {
 		else {
 			if (renderState == null)
 				renderState = new CurveRenderState(hitObject, curve);
-			renderState.draw(color, borderColor, t1, t2);
+			renderState.draw(color, borderColor, t1, t2); // TODO
 		}
 	}
 

src/itdelatrisu/opsu/render/CurveRenderState.java

@@ -143,6 +143,8 @@ public class CurveRenderState {
 				GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
 			}
 			if (firstPointDrawn != drawFrom) {
+				GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
+				GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
 				firstPointDrawn = drawFrom;
 				this.renderCurve(color, borderColor, drawFrom, drawUpTo, true);
 			} else {

src/itdelatrisu/opsu/states/Game.java

@@ -1455,6 +1455,7 @@ public class Game extends BasicGameState {
 			this.leadInTime += epiImgTime;
 			SoundController.mute(false);
 
+			if (Options.isMergingSliders()) {
 				// let's create knorkesliders
 				List<Vec2f> curvepoints = new ArrayList<>();
 				for (GameObject gameObject : gameObjects) {
@@ -1465,6 +1466,7 @@ public class Game extends BasicGameState {
 				}
 				knorkesliders = new FakeCombinedCurve(curvepoints.toArray(new Vec2f[curvepoints.size()]));
 			}
+		}
 
 		slidercurveFrom = 0;
 		slidercurveTo = 0;
@@ -1527,7 +1529,9 @@ public class Game extends BasicGameState {
 	 * @param trackPosition the track position
 	 */
 	private void drawHitObjects(Graphics g, int trackPosition) {
+		if (Options.isMergingSliders()) {
 			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/itdelatrisu/opsu/states/OptionsMenu.java

@@ -82,7 +82,9 @@ public class OptionsMenu extends BasicGameState {
 			GameOption.FORCE_DEFAULT_PLAYFIELD,
 			GameOption.IGNORE_BEATMAP_SKINS,
 			GameOption.SNAKING_SLIDERS,
+			GameOption.SHRINKING_SLIDERS,
 			GameOption.FALLBACK_SLIDERS,
+			GameOption.MERGING_SLIDERS,
 			GameOption.SHOW_HIT_LIGHTING,
 			GameOption.SHOW_COMBO_BURSTS,
 			GameOption.SHOW_PERFECT_HIT,