add option to disable hit animations (close #95)

src/itdelatrisu/opsu/GameData.java

@@ -897,7 +897,8 @@ public class GameData {
 				}
 
 				// hit animation
-				if (hitResult.result != HIT_MISS && (
+				if (Options.isHitAnimationEnabled() &&
+				    hitResult.result != HIT_MISS && (
 				    hitResult.hitResultType == null || // null => initial slider circle
 				    hitResult.hitResultType == HitObjectType.CIRCLE ||
 				    hitResult.hitResultType == HitObjectType.SLIDER_FIRST ||

src/itdelatrisu/opsu/Options.java

@@ -514,6 +514,7 @@ public class Options {
 			}
 		},
 		SHOW_HIT_LIGHTING ("Show Hit Lighting", "HitLighting", "Adds an effect behind hit explosions.", true),
+		SHOW_HIT_ANIMATIONS ("Show Hit Animations", "HitAnimations", "Fade out circles and curves.", 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),
 		SHOW_FOLLOW_POINTS ("Show Follow Points", "FollowPoints", "Whether to show follow points between hit objects.", true),
@@ -1715,6 +1716,12 @@ public class Options {
 	 */
 	public static boolean isHitLightingEnabled() { return GameOption.SHOW_HIT_LIGHTING.getBooleanValue(); }
 
+	/**
+	 * Returns whether or not hit animation effects are enabled.
+	 * @return true if enabled
+	 */
+	public static boolean isHitAnimationEnabled() { return GameOption.SHOW_HIT_ANIMATIONS.getBooleanValue(); }
+
 	/**
 	 * Returns whether or not combo burst effects are enabled.
 	 * @return true if enabled

src/itdelatrisu/opsu/states/OptionsMenu.java

@@ -86,6 +86,7 @@ public class OptionsMenu extends BasicGameState {
 			GameOption.FALLBACK_SLIDERS,
 			GameOption.MERGING_SLIDERS,
 			GameOption.SHOW_HIT_LIGHTING,
+			GameOption.SHOW_HIT_ANIMATIONS,
 			GameOption.SHOW_COMBO_BURSTS,
 			GameOption.SHOW_PERFECT_HIT,
 			GameOption.SHOW_FOLLOW_POINTS,