Added a separate Game Mods menu.

- Replaces the mods being shown in the options menu.
- Added all the (base) mod icons to the menu, with the unimplemented ones grayed out.
- Added a rotation effect to MenuButton, and now multiple effects can be set at once.

Signed-off-by: Jeffrey Han <itdelatrisu@gmail.com>

src/itdelatrisu/opsu/GameData.java

@@ -1007,13 +1007,6 @@ public class GameData {
 		if (hitValue > 0) {
 			SoundController.playHitSound(hitSound);
 
-			// game mod score multipliers
-			float modMultiplier = 1f;
-			for (GameMod mod : GameMod.values()) {
-				if (mod.isActive())
-					modMultiplier *= mod.getMultiplier();
-			}
-
 			/**
 			 * [SCORE FORMULA]
 			 * Score = Hit Value + Hit Value * (Combo * Difficulty * Mod) / 25
@@ -1022,7 +1015,7 @@ public class GameData {
 			 * - Difficulty: the beatmap difficulty
 			 * - Mod: mod multipliers
 			 */
-			score += (hitValue + (hitValue * (Math.max(combo - 1, 0) * difficulty * modMultiplier) / 25));
+			score += (hitValue + (hitValue * (Math.max(combo - 1, 0) * difficulty * GameMod.getScoreMultiplier()) / 25));
 			incrementComboStreak();
 		}
 		hitResultCount[result]++;

src/itdelatrisu/opsu/GameImage.java

@@ -309,7 +309,7 @@ public enum GameImage {
 	MOD_EASY ("selection-mod-easy", "png", false, false) {
 		@Override
 		protected Image process_sub(Image img, int w, int h) {
-			return img.getScaledCopy((h * 0.12f) / img.getHeight());
+			return img.getScaledCopy((h / 12f) / img.getHeight());
 		}
 	},
 	MOD_NO_FAIL ("selection-mod-nofail", "png", false, false) {
@@ -366,6 +366,18 @@ public enum GameImage {
 			return MOD_EASY.process_sub(img, w, h);
 		}
 	},
+	MOD_RELAX ("selection-mod-relax", "png", false, false) {
+		@Override
+		protected Image process_sub(Image img, int w, int h) {
+			return MOD_EASY.process_sub(img, w, h);
+		}
+	},
+	MOD_AUTOPILOT ("selection-mod-relax2", "png", false, false) {
+		@Override
+		protected Image process_sub(Image img, int w, int h) {
+			return MOD_EASY.process_sub(img, w, h);
+		}
+	},
 
 	// Selection Buttons
 	SELECTION_MODS ("selection-mods", "png", false, false) {

src/itdelatrisu/opsu/GameMod.java

@@ -21,6 +21,7 @@ package itdelatrisu.opsu;
 import java.util.Arrays;
 import java.util.Collections;
 
+import org.newdawn.slick.Color;
 import org.newdawn.slick.Image;
 import org.newdawn.slick.Input;
 
@@ -28,29 +29,103 @@ import org.newdawn.slick.Input;
  * Game mods.
  */
 public enum GameMod {
-	EASY          (0, GameImage.MOD_EASY, "EZ", 2, Input.KEY_Q, 0.5f,
+	EASY          (Category.EASY, 0, GameImage.MOD_EASY, "EZ", 2, Input.KEY_Q, 0.5f,
 	              "Reduces overall difficulty - larger circles, more forgiving HP drain, less accuracy required."),
-	NO_FAIL       (1, GameImage.MOD_NO_FAIL, "NF", 1, Input.KEY_W, 0.5f,
+	NO_FAIL       (Category.EASY, 1, GameImage.MOD_NO_FAIL, "NF", 1, Input.KEY_W, 0.5f,
 	              "You can't fail.  No matter what."),
-	HARD_ROCK     (2, GameImage.MOD_HARD_ROCK, "HR", 16, Input.KEY_A, 1.06f,
+	HALF_TIME     (Category.EASY, 2, GameImage.MOD_HALF_TIME, "HT", 256, Input.KEY_E, 0.3f, false,
+	              "Less zoom."),
+	HARD_ROCK     (Category.HARD, 0, GameImage.MOD_HARD_ROCK, "HR", 16, Input.KEY_A, 1.06f,
 	              "Everything just got a bit harder..."),
-	SUDDEN_DEATH  (3, GameImage.MOD_SUDDEN_DEATH, "SD", 32, Input.KEY_S,
+	SUDDEN_DEATH  (Category.HARD, 1, GameImage.MOD_SUDDEN_DEATH, "SD", 32, Input.KEY_S, 1f,
 	              "Miss a note and fail."),
-	SPUN_OUT      (4, GameImage.MOD_SPUN_OUT, "SO", 4096, Input.KEY_V, 0.9f,
+//	PERFECT       (Category.HARD, 1, GameImage.MOD_PERFECT, "PF", 64, Input.KEY_S, 1f,
+//	              "SS or quit."),
+	DOUBLE_TIME   (Category.HARD, 2, GameImage.MOD_DOUBLE_TIME, "DT", 64, Input.KEY_D, 1.12f, false,
+	              "Zoooooooooom."),
+//	NIGHTCORE     (Category.HARD, 2, GameImage.MOD_NIGHTCORE, "NT", 64, Input.KEY_D, 1.12f,
+//	              "uguuuuuuuu"),
+	HIDDEN        (Category.HARD, 3, GameImage.MOD_HIDDEN, "HD", 8, Input.KEY_F, 1.06f, false,
+	              "Play with no approach circles and fading notes for a slight score advantage."),
+	FLASHLIGHT    (Category.HARD, 4, GameImage.MOD_FLASHLIGHT, "FL", 1024, Input.KEY_G, 1.12f, false,
+	              "Restricted view area."),
+	RELAX         (Category.SPECIAL, 0, GameImage.MOD_RELAX, "RL", 128, Input.KEY_Z, 0f, false,
+	              "You don't need to click. Give your clicking/tapping finger a break from the heat of things. **UNRANKED**"),
+	AUTOPILOT     (Category.SPECIAL, 1, GameImage.MOD_AUTOPILOT, "AP", 8192, Input.KEY_X, 0f, false,
+	              "Automatic cursor movement - just follow the rhythm. **UNRANKED**"),
+	SPUN_OUT      (Category.SPECIAL, 2, GameImage.MOD_SPUN_OUT, "SO", 4096, Input.KEY_V, 0.9f,
 	              "Spinners will be automatically completed."),
-	AUTO          (5, GameImage.MOD_AUTO, "", 2048, Input.KEY_B,
+	AUTO          (Category.SPECIAL, 3, GameImage.MOD_AUTO, "", 2048, Input.KEY_B, 1f,
 	              "Watch a perfect automated play through the song.");
-//	HALF_TIME     (6, GameImage.MOD_HALF_TIME, "HT", 256, Input.KEY_E, 0.3f,
-//	              "Less zoom."),
-//	DOUBLE_TIME   (7, GameImage.MOD_DOUBLE_TIME, "DT", 64, Input.KEY_D, 1.12f,
-//	              "Zoooooooooom."),
-//	HIDDEN        (8, GameImage.MOD_HIDDEN, "HD", 8, Input.KEY_F, 1.06f,
-//	              "Play with no approach circles and fading notes for a slight score advantage."),
-//	FLASHLIGHT    (9, GameImage.MOD_FLASHLIGHT, "FL", 1024, Input.KEY_G, 1.12f,
-//	              "Restricted view area.");
 
-	/** The ID of the mod (used for positioning). */
+	/** Mod categories. */
-	private int id;
+	public enum Category {
+		EASY    (0, "Difficulty Reduction", Color.green),
+		HARD    (1, "Difficulty Increase", Color.red),
+		SPECIAL (2, "Special", Color.white);
+
+		/** Drawing index. */
+		private int index;
+
+		/** Category name. */
+		private String name;
+
+		/** Text color. */
+		private Color color;
+
+		/** The coordinates of the category. */
+		private float x, y;
+
+		/**
+		 * Constructor.
+		 * @param index the drawing index
+		 * @param name the category name
+		 * @param color the text color
+		 */
+		Category(int index, String name, Color color) {
+			this.index = index;
+			this.name = name;
+			this.color = color;
+		}
+
+		/**
+		 * Initializes the category.
+		 * @param width the container width
+		 * @param height the container height
+		 */
+		public void init(int width, int height) {
+			float multY = Utils.FONT_LARGE.getLineHeight() * 2 + height * 0.06f;
+			float offsetY = GameImage.MOD_EASY.getImage().getHeight() * 1.5f;
+			this.x = width / 30f;
+			this.y = multY + Utils.FONT_LARGE.getLineHeight() * 3f + offsetY * index;
+		}
+
+		/**
+		 * Returns the category name.
+		 */
+		public String getName() { return name; }
+
+		/**
+		 * Returns the text color.
+		 */
+		public Color getColor() { return color; }
+
+		/**
+		 * Returns the x coordinate of the category.
+		 */
+		public float getX() { return x; }
+
+		/**
+		 * Returns the y coordinate of the category.
+		 */
+		public float getY() { return y; }
+	}
+
+	/** The category for the mod. */
+	private Category category;
+
+	/** The index in the category (for positioning). */
+	private int categoryIndex;
 
 	/** The file name of the mod image. */
 	private GameImage image;
@@ -58,18 +133,21 @@ public enum GameMod {
 	/** The abbreviation for the mod. */
 	private String abbrev;
 
-	/** Bit value associated with the mod. */
-	private int bit;
-
 	/**
-	 * The shortcut key associated with the mod.
+	 * Bit value associated with the mod.
 	 * See the osu! API: https://github.com/peppy/osu-api/wiki#mods
 	 */
+	private int bit;
+
+	/** The shortcut key associated with the mod. */
 	private int key;
 
 	/** The score multiplier. */
 	private float multiplier;
 
+	/** Whether or not the mod is implemented. */
+	private boolean implemented;
+
 	/** The description of the mod. */
 	private String description;
 
@@ -89,28 +167,56 @@ public enum GameMod {
 		Collections.reverse(Arrays.asList(VALUES_REVERSED));
 	}
 
+	/** The last calculated score multiplier, or -1f if it must be recalculated. */
+	private static float scoreMultiplier = -1f;
+
 	/**
-	 * Constructor.
+	 * Initializes the game mods.
-	 * @param id the ID of the mod (for positioning).
+	 * @param width the container width
-	 * @param image the GameImage
+	 * @param height the container height
-	 * @param abbrev the two-letter abbreviation
-	 * @param bit the bit
-	 * @param key the shortcut key
-	 * @param description the description
 	 */
-	GameMod(int id, GameImage image, String abbrev, int bit, int key, String description) {
+	public static void init(int width, int height) {
-		this.id = id;
+		// initialize categories
-		this.image = image;
+		for (Category c : Category.values())
-		this.abbrev = abbrev;
+			c.init(width, height);
-		this.bit = bit;
+
-		this.key = key;
+		// create buttons
-		this.multiplier = 1f;
+		float baseX = Category.EASY.getX() + Utils.FONT_LARGE.getWidth(Category.EASY.getName()) * 1.25f;
-		this.description = description;
+		float offsetX = GameImage.MOD_EASY.getImage().getWidth() * 2.1f;
+		for (GameMod mod : GameMod.values()) {
+			Image img = mod.image.getImage();
+			mod.button = new MenuButton(img,
+					baseX + (offsetX * mod.categoryIndex) + img.getWidth() / 2f,
+					mod.category.getY());
+			mod.button.setHoverExpand(1.2f);
+			mod.button.setHoverRotate(10f);
+
+			// reset state
+			mod.active = false;
+		}
+
+		scoreMultiplier = -1f;
+	}
+
+	/**
+	 * Returns the current score multiplier from all active mods.
+	 */
+	public static float getScoreMultiplier() {
+		if (scoreMultiplier < 0f) {
+			float multiplier = 1f;
+			for (GameMod mod : GameMod.values()) {
+				if (mod.isActive())
+					multiplier *= mod.getMultiplier();
+			}
+			scoreMultiplier = multiplier;
+		}
+		return scoreMultiplier;
 	}
 
 	/**
 	 * Constructor.
-	 * @param id the ID of the mod (for positioning).
+	 * @param category the category for the mod
+	 * @param categoryIndex the index in the category
 	 * @param image the GameImage
 	 * @param abbrev the two-letter abbreviation
 	 * @param bit the bit
@@ -118,37 +224,36 @@ public enum GameMod {
 	 * @param multiplier the score multiplier
 	 * @param description the description
 	 */
-	GameMod(int id, GameImage image, String abbrev, int bit, int key, float multiplier, String description) {
+	GameMod(Category category, int categoryIndex, GameImage image, String abbrev,
-		this.id = id;
+			int bit, int key, float multiplier, String description) {
+		this(category, categoryIndex, image, abbrev, bit, key, 1f, true, description);
+	}
+
+	/**
+	 * Constructor.
+	 * @param category the category for the mod
+	 * @param categoryIndex the index in the category
+	 * @param image the GameImage
+	 * @param abbrev the two-letter abbreviation
+	 * @param bit the bit
+	 * @param key the shortcut key
+	 * @param multiplier the score multiplier
+	 * @param implemented whether the mod is implemented
+	 * @param description the description
+	 */
+	GameMod(Category category, int categoryIndex, GameImage image, String abbrev,
+			int bit, int key, float multiplier, boolean implemented, String description) {
+		this.category = category;
+		this.categoryIndex = categoryIndex;
 		this.image = image;
 		this.abbrev = abbrev;
 		this.bit = bit;
 		this.key = key;
 		this.multiplier = multiplier;
+		this.implemented = implemented;
 		this.description = description;
 	}
 
-	/**
-	 * Initializes the game mod.
-	 * @param width the container width
-	 * @param height the container height
-	 */
-	public void init(int width, int height) {
-		Image img = image.getImage();
-
-		// find coordinates
-		float offsetX = img.getWidth() * 1.5f;
-		float x = (width / 2f) - (offsetX * SIZE / 2.75f);
-		float y = (height * 0.8f) + (img.getHeight() / 2);
-
-		// create button
-		this.button = new MenuButton(img, x + (offsetX * id), y);
-		this.button.setHoverExpand(1.15f);
-
-		// reset state
-		this.active = false;
-	}
-
 	/**
 	 * Returns the abbreviated name of the mod.
 	 * @return the two-letter abbreviation
@@ -185,7 +290,11 @@ public enum GameMod {
 	 * @param checkInverse if true, perform checks for mutual exclusivity
 	 */
 	public void toggle(boolean checkInverse) {
+		if (!implemented)
+			return;
+
 		active = !active;
+		scoreMultiplier = -1f;
 
 		if (checkInverse) {
 			if (AUTO.isActive()) {
@@ -230,10 +339,12 @@ public enum GameMod {
 	 * Draws the game mod.
 	 */
 	public void draw() {
-		if (!active)
+		if (!implemented) {
-			button.getImage().setAlpha(0.5f);
+			button.getImage().setAlpha(0.2f);
+			button.draw();
+			button.getImage().setAlpha(1f);
+		} else
 			button.draw();
-		button.getImage().setAlpha(1.0f);
 	}
 
 	/**
@@ -244,6 +355,16 @@ public enum GameMod {
 	 */
 	public boolean contains(float x, float y) { return button.contains(x, y); }
 
+	/**
+	 * Returns the center x coordinate of the button.
+	 */
+	public float getButtonX() { return button.getX(); }
+
+	/**
+	 * Returns the center y coordinate of the button.
+	 */
+	public float getButtonY() { return button.getY(); }
+
 	/**
 	 * Resets the hover fields for the button.
 	 */

src/itdelatrisu/opsu/MenuButton.java

@@ -24,9 +24,8 @@ import org.newdawn.slick.Font;
 import org.newdawn.slick.Image;
 
 /**
- * A convenience class for menu buttons.
+ * A convenience class for menu buttons, consisting of an image or animation
- * Consists of an image or animation and coordinates.
+ * and coordinates. Multi-part images currently do not support effects.
- * Multi-part images and animations currently do not support hover updates.
  */
 public class MenuButton {
 	/** The image associated with the button. */
@@ -53,24 +52,30 @@ public class MenuButton {
 	/** The color to draw the text with. */
 	private Color color;
 
-	/** Hover action types. */
+	/** Effect types. */
-	private enum HoverAction { NONE, EXPAND, FADE };
+	private static final int
+		EFFECT_EXPAND = 1,
+		EFFECT_FADE   = 2,
+		EFFECT_ROTATE = 4;
 
-	/** The hover action for this button. */
+	/** The hover actions for this button. */
-	private HoverAction hoverAction = HoverAction.NONE;
+	private int hoverEffect = 0;
 
-	/** The current and max scale of the button (for hovering). */
+	/** The current and max scale of the button. */
 	private float scale = 1f, hoverScale = 1.25f;
 
-	/** The current and base alpha level of the button (for hovering). */
+	/** The current and base alpha level of the button. */
 	private float alpha = 1f, baseAlpha = 0.75f;
 
-	/** The scaled expansion direction for the button (for hovering). */
+	/** The scaled expansion direction for the button. */
 	private Expand dir = Expand.CENTER;
 
-	/** Scaled expansion directions (for hovering). */
+	/** Scaled expansion directions. */
 	public enum Expand { CENTER, UP, RIGHT, LEFT, DOWN, UP_RIGHT, UP_LEFT, DOWN_RIGHT, DOWN_LEFT; }
 
+	/** The current and max rotation angles  of the button. */
+	private float angle = 0f, maxAngle = 30f;
+
 	/**
 	 * Creates a new button from an Image.
 	 * @param img the image
@@ -162,43 +167,7 @@ public class MenuButton {
 	/**
 	 * Draws the button.
 	 */
-	public void draw() {
+	public void draw() { draw(null); }
-		if (img != null) {
-			if (imgL == null) {
-				if (hoverAction == HoverAction.EXPAND) {
-					Image imgScaled = (scale == 1f) ? img : img.getScaledCopy(scale);
-					imgScaled.setAlpha(img.getAlpha());
-					imgScaled.draw(x - xRadius, y - yRadius);
-				} else if (hoverAction == HoverAction.FADE) {
-					float a = img.getAlpha();
-					img.setAlpha(alpha);
-					img.draw(x - xRadius, y - yRadius);
-					img.setAlpha(a);
-				} else
-					img.draw(x - xRadius, y - yRadius);
-			} else {
-				if (hoverAction == HoverAction.FADE) {
-					float a = img.getAlpha(), aL = imgL.getAlpha(), aR = imgR.getAlpha();
-					img.setAlpha(alpha);
-					imgL.setAlpha(alpha);
-					imgR.setAlpha(alpha);
-					img.draw(x - xRadius + imgL.getWidth(), y - yRadius);
-					imgL.draw(x - xRadius, y - yRadius);
-					imgR.draw(x + xRadius - imgR.getWidth(), y - yRadius);
-					img.setAlpha(a);
-					imgL.setAlpha(aL);
-					imgR.setAlpha(aR);
-				} else {
-					img.draw(x - xRadius + imgL.getWidth(), y - yRadius);
-					imgL.draw(x - xRadius, y - yRadius);
-					imgR.draw(x + xRadius - imgR.getWidth(), y - yRadius);
-				}
-			}
-		} else
-			anim.draw(x - xRadius, y - yRadius);
-		if (text != null)
-			font.drawString(x - font.getWidth(text) / 2f, y - font.getLineHeight() / 2f, text, color);
-	}
 
 	/**
 	 * Draw the button with a color filter.
@@ -207,37 +176,48 @@ public class MenuButton {
 	public void draw(Color filter) {
 		if (img != null) {
 			if (imgL == null) {
-				if (hoverAction == HoverAction.EXPAND) {
+				if (hoverEffect == 0)
-					Image imgScaled = (scale == 1f) ? img : img.getScaledCopy(scale);
+					Utils.draw(img, x - xRadius, y - yRadius, filter);
-					imgScaled.setAlpha(img.getAlpha());
+				else {
-					imgScaled.draw(x - xRadius, y - yRadius, filter);
+					Image hoverImg = img;
-				} else if (hoverAction == HoverAction.FADE) {
+					float oldAlpha = img.getAlpha();
-					float a = img.getAlpha();
+					float oldAngle = img.getRotation();
-					img.setAlpha(alpha);
+					if ((hoverEffect & EFFECT_EXPAND) > 0) {
-					img.draw(x - xRadius, y - yRadius, filter);
+						if (scale != 1f) {
-					img.setAlpha(a);
+							hoverImg = hoverImg.getScaledCopy(scale);
-				} else
+							hoverImg.setAlpha(oldAlpha);
-					img.draw(x - xRadius, y - yRadius, filter);
+						}
+					}
+					if ((hoverEffect & EFFECT_FADE) > 0)
+						hoverImg.setAlpha(alpha);
+					if ((hoverEffect & EFFECT_ROTATE) > 0)
+						hoverImg.setRotation(angle);
+					Utils.draw(hoverImg, x - xRadius, y - yRadius, filter);
+					if (hoverImg != img) {
+						hoverImg.setAlpha(oldAlpha);
+						hoverImg.setRotation(oldAngle);
+					}
+				}
 			} else {
-				if (hoverAction == HoverAction.FADE) {
+				if (hoverEffect == 0) {
+					Utils.draw(img, x - xRadius + imgL.getWidth(), y - yRadius, filter);
+					Utils.draw(imgL, x - xRadius, y - yRadius, filter);
+					Utils.draw(imgR, x + xRadius - imgR.getWidth(), y - yRadius, filter);
+				} else if ((hoverEffect & EFFECT_FADE) > 0) {
 					float a = img.getAlpha(), aL = imgL.getAlpha(), aR = imgR.getAlpha();
 					img.setAlpha(alpha);
 					imgL.setAlpha(alpha);
 					imgR.setAlpha(alpha);
-					img.draw(x - xRadius + imgL.getWidth(), y - yRadius, filter);
+					Utils.draw(img, x - xRadius + imgL.getWidth(), y - yRadius, filter);
-					imgL.draw(x - xRadius, y - yRadius, filter);
+					Utils.draw(imgL, x - xRadius, y - yRadius, filter);
-					imgR.draw(x + xRadius - imgR.getWidth(), y - yRadius, filter);
+					Utils.draw(imgR, x + xRadius - imgR.getWidth(), y - yRadius, filter);
 					img.setAlpha(a);
 					imgL.setAlpha(aL);
 					imgR.setAlpha(aR);
-				} else {
-					img.draw(x - xRadius + imgL.getWidth(), y - yRadius, filter);
-					imgL.draw(x - xRadius, y - yRadius, filter);
-					imgR.draw(x + xRadius - imgR.getWidth(), y - yRadius, filter);
 				}
 			}
 		} else
-			anim.draw(x - xRadius, y - yRadius, filter);
+			Utils.draw(anim, x - xRadius, y - yRadius, filter);
 		if (text != null)
 			font.drawString(x - font.getWidth(text) / 2f, y - font.getLineHeight() / 2f, text, color);
 	}
@@ -256,55 +236,77 @@ public class MenuButton {
 	 * Resets the hover fields for the button.
 	 */
 	public void resetHover() {
-		if (hoverAction == HoverAction.EXPAND) {
+		if ((hoverEffect & EFFECT_EXPAND) > 0) {
 			this.scale = 1f;
 			setHoverRadius();
-		} else if (hoverAction == HoverAction.FADE)
+		}
+		if ((hoverEffect & EFFECT_FADE) > 0)
 			this.alpha = baseAlpha;
+		if ((hoverEffect & EFFECT_ROTATE) > 0)
+			this.angle = 0f;
 	}
 
 	/**
-	 * Sets the hover action to "expand".
+	 * Removes all hover effects that have been set for the button.
 	 */
-	public void setHoverExpand() { this.hoverAction = HoverAction.EXPAND; }
+	public void removeHoverEffects() { hoverEffect = 0; }
 
 	/**
-	 * Sets the hover action to "expand".
+	 * Sets the "expand" hover effect.
+	 */
+	public void setHoverExpand() { hoverEffect |= EFFECT_EXPAND; }
+
+	/**
+	 * Sets the "expand" hover effect.
 	 * @param scale the maximum scale factor (default 1.25f)
 	 */
 	public void setHoverExpand(float scale) { setHoverExpand(scale, this.dir); }
 
 	/**
-	 * Sets the hover action to "expand".
+	 * Sets the "expand" hover effect.
 	 * @param dir the expansion direction
 	 */
 	public void setHoverExpand(Expand dir) { setHoverExpand(this.hoverScale, dir); }
 
 	/**
-	 * Sets the hover action to "expand".
+	 * Sets the "expand" hover effect.
 	 * @param scale the maximum scale factor (default 1.25f)
 	 * @param dir the expansion direction
 	 */
 	public void setHoverExpand(float scale, Expand dir) {
-		this.hoverAction = HoverAction.EXPAND;
+		hoverEffect |= EFFECT_EXPAND;
 		this.hoverScale = scale;
 		this.dir = dir;
 	}
 
 	/**
-	 * Sets the hover action to "fade".
+	 * Sets the "fade" hover effect.
 	 */
-	public void setHoverFade() { this.hoverAction = HoverAction.FADE; }
+	public void setHoverFade() { hoverEffect |= EFFECT_FADE; }
 
 	/**
-	 * Sets the hover action to "fade".
+	 * Sets the "fade" hover effect.
 	 * @param baseAlpha the base alpha level to fade in from (default 0.7f)
 	 */
 	public void setHoverFade(float baseAlpha) {
-		this.hoverAction = HoverAction.FADE;
+		hoverEffect |= EFFECT_FADE;
 		this.baseAlpha = baseAlpha;
 	}
 
+	/**
+	 * Sets the "rotate" hover effect.
+	 */
+	public void setHoverRotate() { hoverEffect |= EFFECT_ROTATE; }
+
+	/**
+	 * Sets the "rotate" hover effect.
+	 * @param maxAngle the maximum rotation angle, in degrees (default 30f)
+	 */
+	public void setHoverRotate(float maxAngle) {
+		hoverEffect |= EFFECT_ROTATE;
+		this.maxAngle = maxAngle;
+	}
+
 	/**
 	 * Processes a hover action depending on whether or not the cursor
 	 * is hovering over the button.
@@ -313,32 +315,49 @@ public class MenuButton {
 	 * @param cy the y coordinate
 	 */
 	public void hoverUpdate(int delta, float cx, float cy) {
-		if (hoverAction == HoverAction.NONE)
+		if (hoverEffect == 0)
 			return;
-
 		boolean isHover = contains(cx, cy);
-		if (hoverAction == HoverAction.EXPAND) {
+
 		// scale the button
-			int sign;
+		if ((hoverEffect & EFFECT_EXPAND) > 0) {
+			int sign = 0;
 			if (isHover && scale < hoverScale)
 				sign = 1;
 			else if (!isHover && scale > 1f)
 				sign = -1;
-			else
+			if (sign != 0) {
-				return;
 				scale = Utils.getBoundedValue(scale, sign * (hoverScale - 1f) * delta / 100f, 1, hoverScale);
 				setHoverRadius();
-		} else {
+			}
+		}
+
 		// fade the button
-			int sign;
+		if ((hoverEffect & EFFECT_FADE) > 0) {
+			int sign = 0;
 			if (isHover && alpha < 1f)
 				sign = 1;
 			else if (!isHover && alpha > baseAlpha)
 				sign = -1;
-			else
+			if (sign != 0)
-				return;
 				alpha = Utils.getBoundedValue(alpha, sign * (1f - baseAlpha) * delta / 200f, baseAlpha, 1f);
 		}
+
+		// rotate the button
+		if ((hoverEffect & EFFECT_ROTATE) > 0) {
+			int sign = 0;
+			boolean right = (maxAngle > 0);
+			if (isHover && angle != maxAngle)
+				sign = (right) ? 1 : -1;
+			else if (!isHover && angle != 0)
+				sign = (right) ? -1 : 1;
+			if (sign != 0) {
+				float diff = sign * Math.abs(maxAngle) * delta / 125f;
+				angle = (right) ?
+					Utils.getBoundedValue(angle, diff, 0, maxAngle) :
+					Utils.getBoundedValue(angle, diff, maxAngle, 0);
+			}
+		}
 	}
 
 	/**

src/itdelatrisu/opsu/Utils.java

@@ -213,8 +213,7 @@ public class Utils {
 		}
 
 		// initialize game mods
-		for (GameMod mod : GameMod.values())
+		GameMod.init(width, height);
-			mod.init(width, height);
 
 		// initialize hit objects
 		OsuHitObject.init(width, height);
@@ -281,6 +280,34 @@ public class Utils {
 		anim.draw(x - (anim.getWidth() / 2f), y - (anim.getHeight() / 2f));
 	}
 
+	/**
+	 * Draws an image at the given location.
+	 * @param img the image to draw
+	 * @param x the x coordinate
+	 * @param y the y coordinate
+	 * @param color the color filter to apply
+	 */
+	public static void draw(Image img, float x, float y, Color color) {
+		if (color == null)
+			img.draw(x, y);
+		else
+			img.draw(x, y, color);
+	}
+
+	/**
+	 * Draws an animation at the given location.
+	 * @param anim the animation to draw
+	 * @param x the x coordinate
+	 * @param y the y coordinate
+	 * @param color the color filter to apply
+	 */
+	public static void draw(Animation anim, float x, float y, Color color) {
+		if (color == null)
+			anim.draw(x, y);
+		else
+			anim.draw(x, y, color);
+	}
+
 	/**
 	 * Returns a bounded value for a base value and displacement.
 	 * @param base the initial value

src/itdelatrisu/opsu/states/ButtonMenu.java

@@ -19,6 +19,7 @@
 package itdelatrisu.opsu.states;
 
 import itdelatrisu.opsu.GameImage;
+import itdelatrisu.opsu.GameMod;
 import itdelatrisu.opsu.MenuButton;
 import itdelatrisu.opsu.Opsu;
 import itdelatrisu.opsu.OsuGroupList;
@@ -121,6 +122,95 @@ public class ButtonMenu extends BasicGameState {
 			public void leave(GameContainer container, StateBasedGame game) {
 				Button.CLOSE.click(container, game);
 			}
+		},
+		MODS (new Button[] { Button.RESET_MODS, Button.CLOSE }) {
+			@Override
+			public String[] getTitle(GameContainer container, StateBasedGame game) {
+				return new String[] {
+					"Mods provide different ways to enjoy gameplay. Some have an effect on the score you can achieve during ranked play. Others are just for fun."
+				};
+			}
+
+			@Override
+			protected float getBaseY(GameContainer container, StateBasedGame game) {
+				return container.getHeight() * 2f / 3;
+			}
+
+			@Override
+			public void enter(GameContainer container, StateBasedGame game) {
+				super.enter(container, game);
+				for (GameMod mod : GameMod.values())
+					mod.resetHover();
+			}
+
+			@Override
+			public void leave(GameContainer container, StateBasedGame game) {
+				Button.CLOSE.click(container, game);
+			}
+
+			@Override
+			public void draw(GameContainer container, StateBasedGame game, Graphics g) {
+				super.draw(container, game, g);
+
+				int width = container.getWidth();
+				int height = container.getHeight();
+
+				// score multiplier (TODO: fade in color changes)
+				float mult = GameMod.getScoreMultiplier();
+				String multString = String.format("Score Multiplier: %.2fx", mult);
+				Color multColor = (mult == 1f) ? Color.white : (mult > 1f) ? Color.green : Color.red;
+				float multY = Utils.FONT_LARGE.getLineHeight() * 2 + height * 0.06f;
+				Utils.FONT_LARGE.drawString(
+						(width - Utils.FONT_LARGE.getWidth(multString)) / 2f,
+						multY, multString, multColor);
+
+				// category text
+				for (GameMod.Category category : GameMod.Category.values()) {
+					Utils.FONT_LARGE.drawString(category.getX(),
+							category.getY() - Utils.FONT_LARGE.getLineHeight() / 2f,
+							category.getName(), category.getColor());
+				}
+
+				// buttons (TODO: draw descriptions when hovering)
+				for (GameMod mod : GameMod.values())
+					mod.draw();
+			}
+
+			@Override
+			public void update(GameContainer container, int delta, int mouseX, int mouseY) {
+				super.update(container, delta, mouseX, mouseY);
+				for (GameMod mod : GameMod.values()) {
+					if (mod.isActive())
+						mod.hoverUpdate(delta, mod.getButtonX(), mod.getButtonY());
+					else
+						mod.hoverUpdate(delta, -1, -1);
+				}
+			}
+
+			@Override
+			public void keyPress(GameContainer container, StateBasedGame game, int key, char c) {
+				super.keyPress(container, game, key, c);
+				for (GameMod mod : GameMod.values()) {
+					if (key == mod.getKey()) {
+						mod.toggle(true);
+						break;
+					}
+				}
+			}
+
+			@Override
+			public void click(GameContainer container, StateBasedGame game, int cx, int cy) {
+				super.click(container, game, cx, cy);
+				for (GameMod mod : GameMod.values()) {
+					if (mod.contains(cx, cy)) {
+						boolean prevState = mod.isActive();
+						mod.toggle(true);
+						if (mod.isActive() != prevState)
+							SoundController.playSound(SoundEffect.MENUCLICK);
+						return;
+					}
+				}
+			}
 		};
 
 		/** The buttons in the state. */
@@ -153,23 +243,29 @@ public class ButtonMenu extends BasicGameState {
 		 */
 		public void init(GameContainer container, StateBasedGame game, Image button, Image buttonL, Image buttonR) {
 			float center = container.getWidth() / 2f;
-			float centerOffset = container.getWidth() * OFFSET_WIDTH_RATIO;
+			float baseY = getBaseY(container, game);
-			float baseY = container.getHeight() * 0.2f;
-			baseY += ((getTitle(container, game).length - 1) * Utils.FONT_LARGE.getLineHeight());
 			float offsetY = button.getHeight() * 1.25f;
 
 			menuButtons = new MenuButton[buttons.length];
 			for (int i = 0; i < buttons.length; i++) {
-				MenuButton b = new MenuButton(button, buttonL, buttonR,
+				MenuButton b = new MenuButton(button, buttonL, buttonR, center, baseY + (i * offsetY));
-						center + ((i % 2 == 0) ? centerOffset * -1 : centerOffset),
+				b.setText(String.format("%d. %s", i + 1, buttons[i].getText()), Utils.FONT_XLARGE, Color.white);
-						baseY + (i * offsetY));
-				b.setText(String.format("%d. %s", i + 1, buttons[i].getText()),
-						Utils.FONT_XLARGE, Color.white);
 				b.setHoverFade();
 				menuButtons[i] = b;
 			}
 		}
 
+		/**
+		 * Returns the base Y coordinate for the buttons.
+		 * @param container the game container
+		 * @param game the game
+		 */
+		protected float getBaseY(GameContainer container, StateBasedGame game) {
+			float baseY = container.getHeight() * 0.2f;
+			baseY += ((getTitle(container, game).length - 1) * Utils.FONT_LARGE.getLineHeight());
+			return baseY;
+		}
+
 		/**
 		 * Draws the title and buttons to the graphics context.
 		 * @param container the game container
@@ -231,13 +327,14 @@ public class ButtonMenu extends BasicGameState {
 		}
 
 		/**
-		 * Processes a key press action (numeric digits only).
+		 * Processes a key press action.
 		 * @param container the game container
 		 * @param game the game
-		 * @param digit the digit pressed
+		 * @param key the key code that was pressed (see {@link org.newdawn.slick.Input})
+		 * @param c the character of the key that was pressed
 		 */
-		public void keyPress(GameContainer container, StateBasedGame game, int digit) {
+		public void keyPress(GameContainer container, StateBasedGame game, int key, char c) {
-			int index = digit - 1;
+			int index = Character.getNumericValue(c) - 1;
 			if (index >= 0 && index < buttons.length)
 				buttons[index].click(container, game);
 		}
@@ -384,6 +481,16 @@ public class ButtonMenu extends BasicGameState {
 			public void click(GameContainer container, StateBasedGame game) {
 				CANCEL.click(container, game);
 			}
+		},
+		RESET_MODS ("Reset All Mods", Color.red) {
+			@Override
+			public void click(GameContainer container, StateBasedGame game) {
+				SoundController.playSound(SoundEffect.MENUHIT);
+				for (GameMod mod : GameMod.values()) {
+					if (mod.isActive())
+						mod.toggle(false);
+				}
+			}
 		};
 
 		/** The text to show on the button. */
@@ -500,7 +607,7 @@ public class ButtonMenu extends BasicGameState {
 			break;
 		default:
 			if (menuState != null)
-				menuState.keyPress(container, game, Character.getNumericValue(c));
+				menuState.keyPress(container, game, key, c);
 			break;
 		}
 	}

src/itdelatrisu/opsu/states/DownloadsMenu.java

@@ -229,6 +229,7 @@ public class DownloadsMenu extends BasicGameState {
 
 		// search
 		g.setColor(Color.white);
+		g.setLineWidth(2f);
 		search.render(container, g);
 		Utils.FONT_BOLD.drawString(
 				search.getX() + search.getWidth() * 0.01f, search.getY() + search.getHeight() * 1.3f,

src/itdelatrisu/opsu/states/OptionsMenu.java

@@ -19,7 +19,6 @@
 package itdelatrisu.opsu.states;
 
 import itdelatrisu.opsu.GameImage;
-import itdelatrisu.opsu.GameMod;
 import itdelatrisu.opsu.MenuButton;
 import itdelatrisu.opsu.Opsu;
 import itdelatrisu.opsu.Options;
@@ -171,10 +170,6 @@ public class OptionsMenu extends BasicGameState {
 		int width = container.getWidth();
 		int height = container.getHeight();
 
-		// game option coordinate modifiers
-		textY = 20 + (Utils.FONT_XLARGE.getLineHeight() * 3 / 2);
-		offsetY = (int) (((height * 0.8f) - textY) / maxOptionsScreen);
-
 		// option tabs
 		Image tabImage = GameImage.MENU_TAB.getImage();
 		int subtextWidth = Utils.FONT_DEFAULT.getWidth("Click or drag an option to change it.");
@@ -184,6 +179,10 @@ public class OptionsMenu extends BasicGameState {
 				((width - subtextWidth - tabImage.getWidth()) / 2) / OptionTab.SIZE);
 		for (OptionTab tab : OptionTab.values())
 			tab.button = new MenuButton(tabImage, tabX + (tab.ordinal() * tabOffset), tabY);
+
+		// game option coordinate modifiers
+		textY = (int) (tabY + tabImage.getHeight());
+		offsetY = (height - textY - GameImage.MENU_BACK.getImage().getHeight()) / maxOptionsScreen;
 	}
 
 	@Override
@@ -232,21 +231,6 @@ public class OptionsMenu extends BasicGameState {
 		g.drawLine(0, lineY, width, lineY);
 		g.resetLineWidth();
 
-		// game mods
-		Utils.FONT_LARGE.drawString(width / 30, height * 0.8f, "Game Mods:", Color.white);
-		boolean descDrawn = false;
-		for (GameMod mod : GameMod.values()) {
-			mod.draw();
-			if (!descDrawn && mod.contains(mouseX, mouseY)) {
-				Utils.FONT_DEFAULT.drawString(
-						(width - Utils.FONT_DEFAULT.getWidth(mod.getDescription())) / 2,
-						height * 0.975f - Utils.FONT_DEFAULT.getLineHeight(),
-						mod.getDescription(), Color.white
-				);
-				descDrawn = true;
-			}
-		}
-
 		Utils.getBackButton().draw();
 
 		// key entry state
@@ -272,8 +256,6 @@ public class OptionsMenu extends BasicGameState {
 		Utils.updateVolumeDisplay(delta);
 		int mouseX = input.getMouseX(), mouseY = input.getMouseY();
 		Utils.getBackButton().hoverUpdate(delta, mouseX, mouseY);
-		for (GameMod mod : GameMod.values())
-			mod.hoverUpdate(delta, mouseX, mouseY);
 	}
 
 	@Override
@@ -309,17 +291,6 @@ public class OptionsMenu extends BasicGameState {
 			}
 		}
 
-		// game mods
-		for (GameMod mod : GameMod.values()) {
-			if (mod.contains(x, y)) {
-				boolean prevState = mod.isActive();
-				mod.toggle(true);
-				if (mod.isActive() != prevState)
-					SoundController.playSound(SoundEffect.MENUCLICK);
-				return;
-			}
-		}
-
 		// options (click only)
 		GameOption option = getClickedOption(y);
 		if (option != GameOption.NULL)
@@ -400,15 +371,6 @@ public class OptionsMenu extends BasicGameState {
 				currentTab = currentTab.next();
 			SoundController.playSound(SoundEffect.MENUCLICK);
 			break;
-		default:
-			// check mod shortcut keys
-			for (GameMod mod : GameMod.values()) {
-				if (key == mod.getKey()) {
-					mod.toggle(true);
-					break;
-				}
-			}
-			break;
 		}
 	}
 
@@ -417,8 +379,6 @@ public class OptionsMenu extends BasicGameState {
 			throws SlickException {
 		currentTab = OptionTab.DISPLAY;
 		Utils.getBackButton().resetHover();
-		for (GameMod mod : GameMod.values())
-			mod.resetHover();
 	}
 
 	/**

src/itdelatrisu/opsu/states/SongMenu.java

@@ -359,9 +359,8 @@ public class SongMenu extends BasicGameState {
 		}
 
 		// selection buttons
-		// TODO
+		GameImage.SELECTION_MODS.getImage().drawCentered(selectModsButton.getX(), selectModsButton.getY());
-//		GameImage.SELECTION_MODS.getImage().drawCentered(selectModsButton.getX(), selectModsButton.getY());
+		selectModsButton.draw();
-//		selectModsButton.draw();
 		GameImage.SELECTION_RANDOM.getImage().drawCentered(selectRandomButton.getX(), selectRandomButton.getY());
 		selectRandomButton.draw();
 		GameImage.SELECTION_OPTIONS.getImage().drawCentered(selectMapOptionsButton.getX(), selectMapOptionsButton.getY());
@@ -714,9 +713,9 @@ public class SongMenu extends BasicGameState {
 			}
 			break;
 		case Input.KEY_F1:
-			// TODO: mods menu
+			SoundController.playSound(SoundEffect.MENUHIT);
-//			SoundController.playSound(SoundEffect.MENUHIT);
+			((ButtonMenu) game.getState(Opsu.STATE_BUTTONMENU)).setMenuState(MenuState.MODS);
-//			game.enterState();
+			game.enterState(Opsu.STATE_BUTTONMENU);
 			break;
 		case Input.KEY_F2:
 			if (focusNode == null)