Follow-up to #64.

- Removed NEW_SLIDER option, and use the skin "SliderStyle" instead.  Uses the new style by default, unless STYLE_PEPPYSLIDER is specified.
- Check if OpenGL 3.0 is supported before trying to draw new style sliders.
- Fixed compilation warnings; removed unneeded fields and imports.
- Filled in some missing Javadocs.
- Style changes.

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

src/itdelatrisu/opsu/GameData.java

@@ -374,16 +374,10 @@ public class GameData {
 		health = 100f;
 		healthDisplay = 100f;
 		hitResultCount = new int[HIT_MAX];
-		if(hitResultList != null)
+		if (hitResultList != null) {
-		{
+			for (OsuHitObjectResult hitResult : hitResultList) {
-			Iterator<OsuHitObjectResult> iter =hitResultList.iterator();
+				if (hitResult.curve != null)
-			while(iter.hasNext())
+					hitResult.curve.discardCache();
-			{
-				OsuHitObjectResult hitObj = iter.next();
-				if(hitObj != null && hitObj.curve != null)
-				{
-					hitObj.curve.discardCache();
-				}
 			}
 		}
 		hitResultList = new LinkedBlockingDeque<OsuHitObjectResult>();
@@ -951,11 +945,9 @@ public class GameData {
 				}
 
 				hitResult.alpha = 1 - ((float) (trackPosition - hitResult.time) / HITRESULT_FADE_TIME);
-			} else{
+			} else {
-				if (hitResult.curve !=null)
+				if (hitResult.curve != null)
-				{
 					hitResult.curve.discardCache();
-				}
 				iter.remove();
 			}
 		}

src/itdelatrisu/opsu/Options.java

@@ -228,7 +228,6 @@ public class Options {
 				UI.getCursor().reset();
 			}
 		},
-		NEW_SLIDER("Enable New Slider", "Use the new Slider style (requires OpenGL 3.0).",false),
 		DYNAMIC_BACKGROUND ("Enable Dynamic Backgrounds", "The song background will be used as the main menu background.", true),
 		BACKGROUND_DIM ("Background Dim", "Percentage to dim the background image during gameplay.", 50, 0, 100),
 		FORCE_DEFAULT_PLAYFIELD ("Force Default Playfield", "Override the song background with the default playfield background.", false),
@@ -1072,9 +1071,6 @@ public class Options {
 					case "NewCursor":
 						GameOption.NEW_CURSOR.setValue(Boolean.parseBoolean(value));
 						break;
-					case "NewSlider":
-						GameOption.NEW_SLIDER.setValue(Boolean.parseBoolean(value));
-						break;
 					case "DynamicBackground":
 						GameOption.DYNAMIC_BACKGROUND.setValue(Boolean.parseBoolean(value));
 						break;
@@ -1226,8 +1222,6 @@ public class Options {
 			writer.newLine();
 			writer.write(String.format("NewCursor = %b", isNewCursorEnabled()));
 			writer.newLine();
-			writer.write(String.format("NewSlider = %b", GameOption.NEW_SLIDER.getBooleanValue()));
-			writer.newLine();
 			writer.write(String.format("DynamicBackground = %b", isDynamicBackgroundEnabled()));
 			writer.newLine();
 			writer.write(String.format("LoadVerbose = %b", isLoadVerbose()));

src/itdelatrisu/opsu/objects/Slider.java

@@ -187,9 +187,8 @@ public class Slider implements GameObject {
 
 		// start circle
 		hitCircle.drawCentered(x, y, color);
-		if (!overlayAboveNumber) {
+		if (!overlayAboveNumber)
 			hitCircleOverlay.drawCentered(x, y, Utils.COLOR_WHITE_FADE);
-		}
 
 		// ticks
 		if (ticksT != null) {

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

@@ -18,12 +18,14 @@
 
 package itdelatrisu.opsu.objects.curves;
 
-import itdelatrisu.opsu.render.CurveRenderState;
 import itdelatrisu.opsu.GameImage;
+import itdelatrisu.opsu.Options;
 import itdelatrisu.opsu.Utils;
 import itdelatrisu.opsu.beatmap.HitObject;
-import itdelatrisu.opsu.Options;
+import itdelatrisu.opsu.render.CurveRenderState;
+import itdelatrisu.opsu.skins.Skin;
 
+import org.lwjgl.opengl.GLContext;
 import org.newdawn.slick.Color;
 import org.newdawn.slick.Image;
 import org.newdawn.slick.util.Log;
@@ -37,9 +39,9 @@ public abstract class Curve {
 	/** Points generated along the curve should be spaced this far apart. */
 	protected static float CURVE_POINTS_SEPERATION = 5;
 
-	/** The width and height of the display container this curve gets drawn into */
+	/** Whether OpenGL 3.0 is supported. */
-	protected static int containerWidth = 0, containerHeight = 0;
+	private static boolean openGL30 = false;
-	
+
 	/** The associated HitObject. */
 	protected HitObject hitObject;
 
@@ -48,8 +50,8 @@ public abstract class Curve {
 
 	/** The scaled slider x, y coordinate lists. */
 	protected float[] sliderX, sliderY;
-		
+
-	/** Per-curve render-state used for the new style curve renders*/
+	/** Per-curve render-state used for the new style curve renders. */
 	private CurveRenderState renderState;
 
 	/** Points along the curve (set by inherited classes). */
@@ -70,18 +72,22 @@ public abstract class Curve {
 	}
 
 	/**
-	 * Set the width and height of the container that Curves get drawn into
+	 * Set the width and height of the container that Curves get drawn into.
 	 * Should be called before any curves are drawn.
-	 * @param width
+	 * @param width the container width
-	 * @param height 
+	 * @param height the container height
+	 * @param circleSize the circle size
 	 */
-	public static void init(int width, int height, float circleSize)
+	public static void init(int width, int height, float circleSize) {
-	{
+		openGL30 = GLContext.getCapabilities().OpenGL30;
-		containerWidth = width;
+		if (openGL30)
-		containerHeight = height;
+			CurveRenderState.init(width, height, circleSize);
-		CurveRenderState.init(width, height, circleSize);
+		else {
+			if (Options.getSkin().getSliderStyle() != Skin.STYLE_PEPPYSLIDER)
+				Log.warn("New slider style requires OpenGL 3.0, which is not supported.");
+		}
 	}
-	
+
 	/**
 	 * Returns the point on the curve at a value t.
 	 * @param t the t value [0, 1]
@@ -94,23 +100,24 @@ public abstract class Curve {
 	 * @param color the color filter
 	 */
 	public void draw(Color color) {
-		if (curve == null) {
+		if (curve == null)
 			return;
-		}
+
-		if (Options.GameOption.NEW_SLIDER.getBooleanValue()) {
+		// peppysliders
-			if (renderState == null) {
+		if (Options.getSkin().getSliderStyle() == Skin.STYLE_PEPPYSLIDER || !openGL30) {
-				renderState = new CurveRenderState(hitObject);
-			}
-			renderState.draw(color, curve);
-		} else {
 			Image hitCircle = GameImage.HITCIRCLE.getImage();
 			Image hitCircleOverlay = GameImage.HITCIRCLE_OVERLAY.getImage();
-			for (int i = 0; i < curve.length; i++) {
+			for (int i = 0; i < curve.length; i++)
 				hitCircleOverlay.drawCentered(curve[i].x, curve[i].y, Utils.COLOR_WHITE_FADE);
-			}
+			for (int i = 0; i < curve.length; i++)
-			for (int i = 0; i < curve.length; i++) {
 				hitCircle.drawCentered(curve[i].x, curve[i].y, color);
-			}
+		}
+
+		// mmsliders
+		else {
+			if (renderState == null)
+				renderState = new CurveRenderState(hitObject);
+			renderState.draw(color, curve);
 		}
 	}
 
@@ -143,8 +150,11 @@ public abstract class Curve {
 		return a * (1 - t) + b * t;
 	}
 
+	/**
+	 * Discards the slider cache (only used for mmsliders).
+	 */
 	public void discardCache() {
-		if(renderState != null)
+		if (renderState != null)
 			renderState.discardCache();
 	}
 }

src/itdelatrisu/opsu/render/CurveRenderState.java

@@ -18,12 +18,13 @@
 package itdelatrisu.opsu.render;
 
 import itdelatrisu.opsu.GameImage;
-import itdelatrisu.opsu.Options;
 import itdelatrisu.opsu.Utils;
 import itdelatrisu.opsu.beatmap.HitObject;
 import itdelatrisu.opsu.objects.curves.Vec2f;
+
 import java.nio.ByteBuffer;
 import java.nio.FloatBuffer;
+
 import org.lwjgl.BufferUtils;
 import org.lwjgl.opengl.GL11;
 import org.lwjgl.opengl.GL13;
@@ -38,45 +39,46 @@ import org.newdawn.slick.util.Log;
 /**
  * Hold the temporary render state that needs to be restored again after the new
  * style curves are drawn.
+ *
+ * @author Bigpet {@literal <dravorek (at) gmail.com>}
  */
 public class CurveRenderState {
-
+	/** The width and height of the display container this curve gets drawn into. */
-	/** The width and height of the display container this curve gets drawn into */
 	protected static int containerWidth, containerHeight;
-	
-	/** cached drawn slider, only used if new style sliders are activated */
-	public Rendertarget fbo;
 
-	/** thickness of the curve */
+	/** Thickness of the curve. */
 	protected static int scale;
-	
-	/** The HitObject associated with the curve to be drawn */
-	HitObject hitObject;
 
-	/** Static state that's needed to draw the new style curves */
+	/** Static state that's needed to draw the new style curves. */
 	private static final NewCurveStyleState staticState = new NewCurveStyleState();
 
+	/** Cached drawn slider, only used if new style sliders are activated. */
+	public Rendertarget fbo;
+
+	/** The HitObject associated with the curve to be drawn. */
+	protected HitObject hitObject;
+
 	/**
-	 * Set the width and height of the container that Curves get drawn into
+	 * Set the width and height of the container that Curves get drawn into.
 	 * Should be called before any curves are drawn.
-	 * @param width
+	 * @param width the container width
-	 * @param height 
+	 * @param height the container height
+	 * @param circleSize the circle size
 	 */
-	public static void init(int width, int height, float circleSize)
+	public static void init(int width, int height, float circleSize) {
-	{
 		containerWidth = width;
 		containerHeight = height;
-		//equivalent to what happens in Slider.init
+
+		// equivalent to what happens in Slider.init()
 		scale = (int) (104 - (circleSize * 8));
 		scale = (int) (scale * HitObject.getXMultiplier());  // convert from Osupixels (640x480)
-		//scale = scale * 118 / 128; //for curves exaclty as big as the sliderball
+		//scale = scale * 118 / 128; //for curves exactly as big as the sliderball
 		FrameBufferCache.init(width, height);
 	}
 
 	/**
 	 * Creates an object to hold the render state that's necessary to draw a curve.
-	 * @param hitObject the HitObject that represents this curve, just used as a
+	 * @param hitObject the HitObject that represents this curve, just used as a unique ID
-	 * unique ID
 	 */
 	public CurveRenderState(HitObject hitObject) {
 		fbo = null;
@@ -92,13 +94,13 @@ public class CurveRenderState {
 	 */
 	public void draw(Color color, Vec2f[] curve) {
 		float alpha = color.a;
-		//if this curve hasn't been drawn, draw it and cache the result
+
+		// if this curve hasn't been drawn, draw it and cache the result
 		if (fbo == null) {
 			FrameBufferCache cache = FrameBufferCache.getInstance();
 			Rendertarget mapping = cache.get(hitObject);
-			if (mapping == null) {
+			if (mapping == null)
 				mapping = cache.insert(hitObject);
-			}
 			fbo = mapping;
 
 			int old_fb = GL11.glGetInteger(GL30.GL_FRAMEBUFFER_BINDING);
@@ -116,8 +118,8 @@ public class CurveRenderState {
 			GL30.glBindFramebuffer(GL30.GL_DRAW_FRAMEBUFFER, old_fb);
 			Utils.COLOR_WHITE_FADE.a = alpha;
 		}
-		
+
-		//draw a fullscreen quad with the texture that contains the curve
+		// draw a fullscreen quad with the texture that contains the curve
 		GL11.glEnable(GL11.GL_TEXTURE_2D);
 		GL11.glDisable(GL11.GL_TEXTURE_1D);
 		GL11.glBindTexture(GL11.GL_TEXTURE_2D, fbo.getTextureID());
@@ -134,15 +136,18 @@ public class CurveRenderState {
 		GL11.glEnd();
 	}
 
+	/**
+	 * Discard the cache.
+	 */
 	public void discardCache() {
 		fbo = null;
 		FrameBufferCache.getInstance().freeMappingFor(hitObject);
 	}
 
 	/**
-	 * Just a structure to hold all the important OpenGL state that needs to be
+	 * A structure to hold all the important OpenGL state that needs to be
 	 * changed to draw the curve. This is used to backup and restore the state
-	 * so that the code outside of this (mainly Slick2D) doesn't break
+	 * so that the code outside of this (mainly Slick2D) doesn't break.
 	 */
 	private class RenderState {
 		boolean smoothedPoly;
@@ -157,8 +162,7 @@ public class CurveRenderState {
 
 	/**
 	 * Backup the current state of the relevant OpenGL state and change it to
-	 * what's needed to draw the curve
+	 * what's needed to draw the curve.
-	 * @return 
 	 */
 	private RenderState startRender() {
 		RenderState state = new RenderState();
@@ -182,7 +186,7 @@ public class CurveRenderState {
 		GL11.glTexParameteri(GL11.GL_TEXTURE_1D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR_MIPMAP_LINEAR);
 		GL11.glTexParameteri(GL11.GL_TEXTURE_1D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
 		GL11.glTexParameteri(GL11.GL_TEXTURE_1D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_CLAMP);
-		
+
 		GL20.glUseProgram(0);
 
 		GL11.glMatrixMode(GL11.GL_PROJECTION);
@@ -196,7 +200,7 @@ public class CurveRenderState {
 	}
 
 	/**
-	 * Restore the old OpenGL state that's backed up in {@code state}
+	 * Restore the old OpenGL state that's backed up in {@code state}.
 	 * @param state the old state to restore
 	 */
 	private void endRender(RenderState state) {
@@ -208,21 +212,16 @@ public class CurveRenderState {
 		GL20.glUseProgram(state.oldProgram);
 		GL13.glActiveTexture(state.texUnit);
 		GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, state.oldArrayBuffer);
-		if (!state.depthWriteEnabled) {
+		if (!state.depthWriteEnabled)
 			GL11.glDepthMask(false);
-		}
+		if (!state.depthEnabled)
-		if (!state.depthEnabled) {
 			GL11.glDisable(GL11.GL_DEPTH_TEST);
-		}
+		if (state.texEnabled)
-		if (state.texEnabled) {
 			GL11.glEnable(GL11.GL_TEXTURE_2D);
-		}
+		if (state.smoothedPoly)
-		if (state.smoothedPoly) {
 			GL11.glEnable(GL11.GL_POLYGON_SMOOTH);
-		}
+		if (!state.blendEnabled)
-		if (!state.blendEnabled) {
 			GL11.glDisable(GL11.GL_BLEND);
-		}
 	}
 
 	/**
@@ -234,14 +233,14 @@ public class CurveRenderState {
 		staticState.initGradient();
 		RenderState state = startRender();
 		int vtx_buf;
-		//The size is: floatsize * (position + texture coordinates) * (number of cones) * (vertices in a cone)
+		// the size is: floatsize * (position + texture coordinates) * (number of cones) * (vertices in a cone)
 		FloatBuffer buff = BufferUtils.createByteBuffer(4 * (4 + 2) * (2 * curve.length - 1) * (NewCurveStyleState.DIVIDES + 2)).asFloatBuffer();
 		staticState.initShaderProgram();
 		vtx_buf = GL15.glGenBuffers();
 		for (int i = 0; i < curve.length; ++i) {
 			float x = curve[i].x;
 			float y = curve[i].y;
-			//if(i == 0 || i==curve.length-1){
+			//if (i == 0 || i == curve.length - 1){
 			fillCone(buff, x, y, NewCurveStyleState.DIVIDES);
 			if (i != 0) {
 				float last_x = curve[i - 1].x;
@@ -265,9 +264,8 @@ public class CurveRenderState {
 		//2*4 is for skipping the first 2 floats (u,v)
 		GL20.glVertexAttribPointer(staticState.attribLoc, 4, GL11.GL_FLOAT, false, 6 * 4, 2 * 4);
 		GL20.glVertexAttribPointer(staticState.texCoordLoc, 2, GL11.GL_FLOAT, false, 6 * 4, 0);
-		for (int i = 0; i < curve.length*2-1; ++i) {
+		for (int i = 0; i < curve.length * 2 - 1; ++i)
 			GL11.glDrawArrays(GL11.GL_TRIANGLE_FAN, i * (NewCurveStyleState.DIVIDES + 2), NewCurveStyleState.DIVIDES + 2);
-		}
 		GL20.glDisableVertexAttribArray(staticState.texCoordLoc);
 		GL20.glDisableVertexAttribArray(staticState.attribLoc);		
 		GL15.glDeleteBuffers(vtx_buf);
@@ -277,7 +275,7 @@ public class CurveRenderState {
 	/**
 	 * Fill {@code buff} with the texture coordinates and positions for a cone
 	 * with {@code DIVIDES} ground corners that has its center at the coordinates
-	 * {@code (x1,y1)}
+	 * {@code (x1,y1)}.
 	 * @param buff the buffer to be filled
 	 * @param x1 x-coordinate of the cone
 	 * @param y1 y-coordinate of the cone
@@ -332,57 +330,53 @@ public class CurveRenderState {
 	 * @author Bigpet {@literal <dravorek (at) gmail.com>}
 	 */
 	private static class NewCurveStyleState {
-
 		/**
-		 * used for new style Slider rendering, defines how many vertices the
+		 * Used for new style Slider rendering, defines how many vertices the
-		 * base of the cone has that is used to draw the curve
+		 * base of the cone has that is used to draw the curve.
 		 */
 		protected static final int DIVIDES = 30;
 
-		/** OpenGL shader program ID used to draw and recolor the curve */
+		/** OpenGL shader program ID used to draw and recolor the curve. */
 		protected int program = 0;
 
-		/** OpenGL shader attribute location of the vertex position attribute */
+		/** OpenGL shader attribute location of the vertex position attribute. */
 		protected int attribLoc = 0;
 
-		/** OpenGL shader attribute location of the texture coordinate attribute */
+		/** OpenGL shader attribute location of the texture coordinate attribute. */
 		protected int texCoordLoc = 0;
 
-		/** OpenGL shader uniform location of the color attribute */
+		/** OpenGL shader uniform location of the color attribute. */
 		protected int colLoc = 0;
 		
-		/** OpenGL shader uniform location of the texture sampler attribute */
+		/** OpenGL shader uniform location of the texture sampler attribute. */
 		protected int texLoc = 0;
 
-		/** OpenGL texture id for the gradient texture for the curve */
+		/** OpenGL texture id for the gradient texture for the curve. */
 		protected int gradientTexture = 0;
 		
 		/**
 		 * Reads the first row of the slider gradient texture and upload it as
-		 * a 1D texture to OpenGL if it hasn't already been done
+		 * a 1D texture to OpenGL if it hasn't already been done.
 		 */
-		public void initGradient()
+		public void initGradient() {
-		{
+			if (gradientTexture == 0) {
-			if(gradientTexture == 0)
+				Image slider = GameImage.SLIDER_GRADIENT.getImage().getScaledCopy(1.0f / GameImage.getUIscale());
-			{
-				Image slider = GameImage.SLIDER_GRADIENT.getImage().getScaledCopy(1.0f/GameImage.getUIscale());
 				staticState.gradientTexture = GL11.glGenTextures();
-				ByteBuffer buff = BufferUtils.createByteBuffer(slider.getWidth()*4);
+				ByteBuffer buff = BufferUtils.createByteBuffer(slider.getWidth() * 4);
-				for(int i=0 ; i< slider.getWidth(); ++i)
+				for (int i = 0; i < slider.getWidth(); ++i) {
-				{
 					Color col = slider.getColor(i, 0);
-					buff.put((byte)(255*col.r));
+					buff.put((byte) (255 * col.r));
-					buff.put((byte)(255*col.g));
+					buff.put((byte) (255 * col.g));
-					buff.put((byte)(255*col.b));
+					buff.put((byte) (255 * col.b));
-					buff.put((byte)(255*col.a));
+					buff.put((byte) (255 * col.a));
 				}
 				buff.flip();
 				GL11.glBindTexture(GL11.GL_TEXTURE_1D, gradientTexture);
-				GL11.glTexImage1D(GL11.GL_TEXTURE_1D,0,GL11.GL_RGBA,slider.getWidth(),0,GL11.GL_RGBA,GL11.GL_UNSIGNED_BYTE,buff);
+				GL11.glTexImage1D(GL11.GL_TEXTURE_1D, 0, GL11.GL_RGBA, slider.getWidth(), 0, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, buff);
 				GL30.glGenerateMipmap(GL11.GL_TEXTURE_1D);
 			}
 		}
-		
+
 		/**
 		 * Compiles and links the shader program for the new style curve objects
 		 * if it hasn't already been compiled and linked.
@@ -407,7 +401,7 @@ public class CurveRenderState {
 				int res = GL20.glGetShaderi(vtxShdr, GL20.GL_COMPILE_STATUS);
 				if (res != GL11.GL_TRUE) {
 					String error = GL20.glGetShaderInfoLog(vtxShdr, 1024);
-					Log.error("Vertex Shader compilation failed", new Exception(error));
+					Log.error("Vertex Shader compilation failed.", new Exception(error));
 				}
 				GL20.glShaderSource(frgShdr, "#version 330\n"
 						+ "\n"
@@ -429,7 +423,7 @@ public class CurveRenderState {
 				res = GL20.glGetShaderi(frgShdr, GL20.GL_COMPILE_STATUS);
 				if (res != GL11.GL_TRUE) {
 					String error = GL20.glGetShaderInfoLog(frgShdr, 1024);
-					Log.error("Fragment Shader compilation failed", new Exception(error));
+					Log.error("Fragment Shader compilation failed.", new Exception(error));
 				}
 				GL20.glAttachShader(program, vtxShdr);
 				GL20.glAttachShader(program, frgShdr);
@@ -437,7 +431,7 @@ public class CurveRenderState {
 				res = GL20.glGetProgrami(program, GL20.GL_LINK_STATUS);
 				if (res != GL11.GL_TRUE) {
 					String error = GL20.glGetProgramInfoLog(program, 1024);
-					Log.error("Program linking failed", new Exception(error));
+					Log.error("Program linking failed.", new Exception(error));
 				}
 				attribLoc = GL20.glGetAttribLocation(program, "in_position");
 				texCoordLoc = GL20.glGetAttribLocation(program, "in_tex_coord");

src/itdelatrisu/opsu/render/FrameBufferCache.java

@@ -17,57 +17,68 @@
  */
 package itdelatrisu.opsu.render;
 
-import itdelatrisu.opsu.Opsu;
-import itdelatrisu.opsu.Options;
 import itdelatrisu.opsu.beatmap.HitObject;
+
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Map;
+
 import org.newdawn.slick.util.Log;
 
 /**
  * This is cache for OpenGL FrameBufferObjects. This is currently only used
  * to draw curve objects of the new slider style. Does currently not integrate
  * well and requires some manual OpenGL state manipulation to use it.
+ *
  * @author Bigpet {@literal <dravorek (at) gmail.com>}
  */
 public class FrameBufferCache {
-	private static final int INITIAL_CACHE_SIZE = 4;
+	/** The initial cache size. */
+	//private static final int INITIAL_CACHE_SIZE = 4;
+
+	/** The single framebuffer cache instance. */
 	private static FrameBufferCache instance = null;
+
+	/** The mapping from hit objects to framebuffers. */
 	private Map<HitObject, Rendertarget> cacheMap;
+
+	/** */
 	private ArrayList<Rendertarget> cache;
-	public static int width;
+
-	public static int height;
+	/** Container dimensions. */
+	public static int width, height;
 
 	/**
 	 * Set the width and height of the framebuffers in this cache.
 	 * Should be called before anything is inserted into the map.
-	 * @param width
+	 * @param width the container width
-	 * @param height 
+	 * @param height the container height
 	 */
-	public static void init(int width, int height)
+	public static void init(int width, int height) {
-	{
 		FrameBufferCache.width = width;
 		FrameBufferCache.height = height;
 	}
-	
+
+	/**
+	 * Constructor.
+	 */
 	private FrameBufferCache() {
-		cache = new ArrayList<>();
+		cache = new ArrayList<Rendertarget>();
-		cacheMap = new HashMap<>();
+		cacheMap = new HashMap<HitObject, Rendertarget>();
 	}
 
 	/**
-	 * Check if there is a framebuffer object mapped to the {@code HitObject obj}
+	 * Check if there is a framebuffer object mapped to {@code obj}.
-	 * @param obj 
+	 * @param obj the hit object
-	 * @return true if there is a framebuffer mapped for this HitObject, else false
+	 * @return true if there is a framebuffer mapped for this {@code HitObject}, else false
 	 */
 	public boolean contains(HitObject obj) {
 		return cacheMap.containsKey(obj);
 	}
 
 	/**
-	 * Get the {@code Rendertarget} mapped to {@code obj}
+	 * Get the {@code Rendertarget} mapped to {@code obj}.
-	 * @param obj
+	 * @param obj the hit object
 	 * @return the {@code Rendertarget} if there's one mapped to {@code obj}, otherwise null
 	 */
 	public Rendertarget get(HitObject obj) {
@@ -75,8 +86,8 @@ public class FrameBufferCache {
 	}
 
 	/**
-	 * Clear the mapping for {@code obj} to free it up to get used by another {@code HitObject}
+	 * Clear the mapping for {@code obj} to free it up to get used by another {@code HitObject}.
-	 * @param obj
+	 * @param obj the hit object
 	 * @return true if there was a mapping for {@code obj} and false if there was no mapping for it.
 	 */
 	public boolean freeMappingFor(HitObject obj) {
@@ -95,11 +106,11 @@ public class FrameBufferCache {
 	 * Create a mapping from {@code obj} to a framebuffer. If there was already 
 	 * a mapping from {@code obj} this will associate another framebuffer with it 
 	 * (thereby freeing up the previously mapped framebuffer).
-	 * @param obj
+	 * @param obj the hit object
 	 * @return the {@code Rendertarget} newly mapped to {@code obj}
 	 */
 	public Rendertarget insert(HitObject obj) {
-		//find first RTTFramebuffer that's not mapped to anything and return it
+		// find first RTTFramebuffer that's not mapped to anything and return it
 		Rendertarget buffer;
 		for (int i = 0; i < cache.size(); ++i) {
 			buffer = cache.get(i);
@@ -108,7 +119,8 @@ public class FrameBufferCache {
 				return buffer;
 			}
 		}
-		//no unmapped RTTFramebuffer found, create a new one
+
+		// no unmapped RTTFramebuffer found, create a new one
 		buffer = Rendertarget.createRTTFramebuffer(width, height);
 		cache.add(buffer);
 		Log.warn("Framebuffer cache was not large enough, possible resource leak.");
@@ -117,15 +129,14 @@ public class FrameBufferCache {
 	}
 
 	/**
-	 * There should only ever be one framebuffer cache, this function returns that one framebuffer cache instance.
+	 * There should only ever be one framebuffer cache, this function returns
+	 * that one framebuffer cache instance.
 	 * If there was no instance created already then this function creates it.
 	 * @return the instance of FrameBufferCache
 	 */
 	public static FrameBufferCache getInstance() {
-		if (instance == null) {
+		if (instance == null)
 			instance = new FrameBufferCache();
-		}
 		return instance;
 	}
-	
 }

src/itdelatrisu/opsu/render/Rendertarget.java

@@ -24,64 +24,70 @@ import org.lwjgl.opengl.GL30;
 import org.lwjgl.opengl.GL32;
 
 /**
+ * Represents a rendertarget. For now this maps to an OpenGL FBO via LWJGL.
  *
- * Represents a rendertarget. For now this maps to an OpenGL FBO via LWJGL
+ * @author Bigpet {@literal <dravorek (at) gmail.com>}
  */
 public class Rendertarget {
-	public final int width;
+	/** The dimensions. */
-	public final int height;
+	public final int width, height;
+
+	/** The FBO ID. */
 	private final int fboID;
+
+	/** The texture ID. */
 	private final int textureID;
 
 	/**
-	 * Create a new FBO
+	 * Create a new FBO.
-	 * 
+	 * @param width the width
-	 * @param width
+	 * @param height the height
-	 * @param height 
 	 */
-	private Rendertarget(int width, int height)
+	private Rendertarget(int width, int height) {
-	{
 		this.width = width;
 		this.height = height;
 		fboID = GL30.glGenFramebuffers();
 		textureID = GL11.glGenTextures();
 	}
-	
+
 	/**
 	 * Bind this rendertarget as the primary framebuffer.
 	 */
-	public void bind()
+	public void bind() {
-	{
 		GL30.glBindFramebuffer(GL30.GL_DRAW_FRAMEBUFFER, fboID);
 	}
-	
+
-	//use judiciously, try to avoid if possible and consider adding a method to
+	/**
-	//this class if you find yourself calling this repeatedly
+	 * Returns the FBO ID.
-	public int getID()
+	 */
-	{
+	// NOTE: use judiciously, try to avoid if possible and consider adding a
+	// method to this class if you find yourself calling this repeatedly.
+	public int getID() {
 		return fboID;
 	}
-	
+
-	//try not to use, could be moved into seperate class
+	/**
-	public int getTextureID()
+	 * Returns the texture ID.
-	{
+	 */
+	// NOTE: try not to use, could be moved into separate class.
+	public int getTextureID() {
 		return textureID;
 	}
 
 	/**
-	 * Bind the default framebuffer
+	 * Bind the default framebuffer.
 	 */
-	public static void unbind()
+	public static void unbind() {
-	{
 		GL30.glBindFramebuffer(GL30.GL_DRAW_FRAMEBUFFER, 0);
 	}
-	
+
 	/**
 	 * Creates a Rendertarget with a Texture that it renders the color buffer in
 	 * and a renderbuffer that it renders the depth to.
+	 * @param width the width
+	 * @param height the height
 	*/
-	public static Rendertarget createRTTFramebuffer(int width, int height)
+	public static Rendertarget createRTTFramebuffer(int width, int height) {
-	{
 		int old_framebuffer = GL11.glGetInteger(GL30.GL_READ_FRAMEBUFFER_BINDING);
 		int old_texture = GL11.glGetInteger(GL11.GL_TEXTURE_BINDING_2D);
 		Rendertarget buffer = new Rendertarget(width,height);
@@ -104,7 +110,6 @@ public class Rendertarget {
 		GL11.glBindTexture(GL11.GL_TEXTURE_2D, old_texture);
 		GL30.glBindFramebuffer(GL30.GL_DRAW_FRAMEBUFFER, old_framebuffer);
 
-
 		return buffer;
 	}
 }

src/itdelatrisu/opsu/skins/Skin.java

@@ -31,10 +31,10 @@ public class Skin {
 
 	/** Slider styles. */
 	public static final byte
-		STYLE_PEPPYSLIDER = 1,
+		STYLE_PEPPYSLIDER = 1,   // fallback
-		STYLE_MMSLIDER = 2,
+		STYLE_MMSLIDER = 2,      // default (requires OpenGL 3.0)
-		STYLE_TOONSLIDER = 3,
+		STYLE_TOONSLIDER = 3,    // not implemented
-		STYLE_OPENGLSLIDER = 4;
+		STYLE_OPENGLSLIDER = 4;  // not implemented
 
 	/** The latest skin version. */
 	protected static final int LATEST_VERSION = 2;
@@ -133,7 +133,7 @@ public class Skin {
 	protected boolean comboBurstRandom = false;
 
 	/** The slider style to use (see STYLE_* constants). */
-	protected byte sliderStyle = 2;
+	protected byte sliderStyle = STYLE_MMSLIDER;
 
 	/**
 	 * [Colours]

src/itdelatrisu/opsu/states/Game.java

@@ -31,8 +31,8 @@ import itdelatrisu.opsu.audio.MusicController;
 import itdelatrisu.opsu.audio.SoundController;
 import itdelatrisu.opsu.audio.SoundEffect;
 import itdelatrisu.opsu.beatmap.Beatmap;
-import itdelatrisu.opsu.beatmap.HitObject;
 import itdelatrisu.opsu.beatmap.BeatmapParser;
+import itdelatrisu.opsu.beatmap.HitObject;
 import itdelatrisu.opsu.beatmap.TimingPoint;
 import itdelatrisu.opsu.db.BeatmapDB;
 import itdelatrisu.opsu.db.ScoreDB;
@@ -1025,7 +1025,7 @@ public class Game extends BasicGameState {
 		if (beatmap == null || beatmap.objects == null)
 			throw new RuntimeException("Running game with no beatmap loaded.");
 
-		//free all previously cached hitobject to framebuffer mappings if some still exist
+		// free all previously cached hitobject to framebuffer mappings if some still exist
 		FrameBufferCache.getInstance().freeMap();
 
 		// grab the mouse (not working for touchscreen)
@@ -1393,7 +1393,7 @@ public class Game extends BasicGameState {
 		Circle.init(container, circleSize);
 		Slider.init(container, circleSize, beatmap);
 		Spinner.init(container);
-		Curve.init(container.getWidth(),container.getHeight(),circleSize);
+		Curve.init(container.getWidth(), container.getHeight(), circleSize);
 
 		// approachRate (hit object approach time)
 		if (approachRate < 5)

src/itdelatrisu/opsu/states/OptionsMenu.java

@@ -59,8 +59,7 @@ public class OptionsMenu extends BasicGameState {
 			GameOption.SCREENSHOT_FORMAT,
 			GameOption.NEW_CURSOR,
 			GameOption.DYNAMIC_BACKGROUND,
-			GameOption.LOAD_VERBOSE,
+			GameOption.LOAD_VERBOSE
-			GameOption.NEW_SLIDER
 		}),
 		MUSIC ("Music", new GameOption[] {
 			GameOption.MASTER_VOLUME,