Left hand

src/lwjgl/java/net/minecraft/client/settings/GameSettings.java

@@ -268,6 +268,7 @@ public class GameSettings {
 	public boolean ofCustomColors = true;
 	public boolean hidePassword = true;
 	public boolean fullBright = false;
+	public boolean leftHand = false;
 	
 	public boolean enableFNAWSkins = true;
 	public int voiceListenRadius = 16;
@@ -919,6 +920,10 @@ public class GameSettings {
 			this.fullBright = !this.fullBright;
 		}
 		
+		if(parOptions == GameSettings.Options.LEFT_HAND) {
+			this.leftHand = !this.leftHand;
+		}
+		
 		this.saveOptions();
 	}
 
@@ -1047,6 +1052,8 @@ public class GameSettings {
 			return this.enableVsync;
 		case FULLBRIGHT:
 			return this.fullBright;
+		case LEFT_HAND:
+			return this.leftHand;
 		default:
 			return false;
 		}
@@ -1103,6 +1110,8 @@ public class GameSettings {
 					: (parOptions == GameSettings.Options.AF_LEVEL ? (this.ofAfLevel == 1 ? s + Lang.getOff() : s + this.ofAfLevel)
 					: (parOptions == GameSettings.Options.AA_LEVEL ? s + this.getAntialiasingString()
 					: "yee")))))))))))))))));
+		}  else if (parOptions == GameSettings.Options.LEFT_HAND) {
+			return this.leftHand ? s + "Left" : s + "Right";
 		} else if (parOptions.getEnumBoolean()) {
 			boolean flag = this.getOptionOrdinalValue(parOptions);
 			return flag ? s + I18n.format("options.on", new Object[0]) : s + I18n.format("options.off", new Object[0]);
@@ -1919,6 +1928,10 @@ public class GameSettings {
 						fullBright = Boolean.valueOf(astring[1]).booleanValue();
 					}
 					
+					if (astring[0].equals("leftHand") && astring.length >= 2) {
+						leftHand = Boolean.valueOf(astring[1]).booleanValue();
+					}
+
 					for (SoundCategory soundcategory : SoundCategory._VALUES) {
 						if (astring[0].equals("soundCategory_" + soundcategory.getCategoryName())) {
 							this.mapSoundLevels.put(soundcategory, Float.valueOf(this.parseFloat(astring[1])));
@@ -2113,6 +2126,7 @@ public class GameSettings {
 			printwriter.println("voicePTTKey:" + this.voicePTTKey);
 			printwriter.println("enableFNAWSkins:" + this.enableFNAWSkins);
 			printwriter.println("fullbright:" + this.fullBright);
+			printwriter.println("leftHand:" + this.leftHand);
 
 			for (KeyBinding keybinding : this.keyBindings) {
 				printwriter.println("key_" + keybinding.getKeyDescription() + ":" + keybinding.getKeyCode());
@@ -2325,7 +2339,8 @@ public class GameSettings {
         HIDE_PASSWORD("Hide Password", false, false),
         FNAW_SKINS("options.skinCustomisation.enableFNAWSkins", false, true),
 		EAGLER_VSYNC("options.vsync", false, true),
-		FULLBRIGHT("Fullbright", false, true);
+		FULLBRIGHT("Fullbright", false, true),
+		LEFT_HAND("Main Hand", false, true);
 
 		private final boolean enumFloat;
 		private final boolean enumBoolean;

src/main/java/net/PeytonPlayz585/shadow/GuiShadow.java

@@ -9,7 +9,7 @@ import net.minecraft.client.settings.GameSettings;
 
 public class GuiShadow extends GuiScreen {
 	
-	private static GameSettings.Options[] enumOptions = new GameSettings.Options[] {GameSettings.Options.TOGGLE_SPRINT, GameSettings.Options.CHUNK_BORDERS, GameSettings.Options.HIDE_PASSWORD, GameSettings.Options.FULLBRIGHT};
+	private static GameSettings.Options[] enumOptions = new GameSettings.Options[] {GameSettings.Options.TOGGLE_SPRINT, GameSettings.Options.CHUNK_BORDERS, GameSettings.Options.HIDE_PASSWORD, GameSettings.Options.FULLBRIGHT, GameSettings.Options.LEFT_HAND};
 	
 	private GuiScreen parentScreen;
 	protected String title;

src/main/java/net/minecraft/client/renderer/ItemRenderer.java

@@ -173,6 +173,10 @@ public class ItemRenderer {
 	}
 
 	private void renderItemMap(AbstractClientPlayer clientPlayer, float parFloat1, float parFloat2, float parFloat3) {
+		if(this.mc.gameSettings.leftHand) {
+			GlStateManager.cullFace(GL_BACK);
+			GlStateManager.scale(-1, 1, 1);
+		}
 		float f = -0.4F * MathHelper.sin(MathHelper.sqrt_float(parFloat3) * 3.1415927F);
 		float f1 = 0.2F * MathHelper.sin(MathHelper.sqrt_float(parFloat3) * 3.1415927F * 2.0F);
 		float f2 = -0.2F * MathHelper.sin(parFloat3 * 3.1415927F);
@@ -267,6 +271,12 @@ public class ItemRenderer {
 	 * item in first person.
 	 */
 	private void transformFirstPersonItem(float equipProgress, float swingProgress) {
+		if(this.mc.gameSettings.leftHand && ((this.itemToRender.getItem() == Items.compass) || (this.itemToRender.getItem() == Items.clock))){
+			GlStateManager.cullFace(GL_BACK);
+			GlStateManager.translate(0.05, -0.63, -1.35);
+			GlStateManager.rotate(-50, 1, 0, 0);
+			GlStateManager.scale(1, 1, -1);
+		}
 		GlStateManager.translate(0.56F, -0.52F, -0.71999997F);
 		GlStateManager.translate(0.0F, equipProgress * -0.6F, 0.0F);
 		GlStateManager.rotate(45.0F, 0.0F, 1.0F, 0.0F);
@@ -314,8 +324,15 @@ public class ItemRenderer {
 	 * person mode. Args: partialTickTime
 	 */
 	public void renderItemInFirstPerson(float partialTicks) {
-		float f = 1.0F
+		if(this.mc.gameSettings.leftHand) {
-				- (this.prevEquippedProgress + (this.equippedProgress - this.prevEquippedProgress) * partialTicks);
+			GlStateManager.scale(-1, 1, 1);
+	    	if(itemToRender != null) {
+	    		GlStateManager.cullFace(GL_FRONT);
+	    	} else {
+	    		GlStateManager.cullFace(GL_BACK);
+	    	}
+		}
+		float f = 1.0F - (this.prevEquippedProgress + (this.equippedProgress - this.prevEquippedProgress) * partialTicks);
 		EntityPlayerSP entityplayersp = this.mc.thePlayer;
 		float f1 = entityplayersp.getSwingProgress(partialTicks);
 		float f2 = entityplayersp.prevRotationPitch

src/teavm/java/net/minecraft/client/settings/GameSettings.java

@@ -271,6 +271,7 @@ public class GameSettings extends ModData {
 	public boolean hidePassword = true;
 	public boolean enableFNAWSkins = true;
 	public boolean fullBright = false;
+	public boolean leftHand = false;
 	
 	public int voiceListenRadius = 16;
 	public float voiceListenVolume = 0.5f;
@@ -1083,6 +1084,10 @@ public class GameSettings extends ModData {
 			this.fullBright = !this.fullBright;
 		}
 		
+		if(parOptions == GameSettings.Options.LEFT_HAND) {
+			this.leftHand = !this.leftHand;
+		}
+
 		this.saveOptions();
 	}
 
@@ -1209,6 +1214,8 @@ public class GameSettings extends ModData {
 			return this.enableVsync;
 		case FULLBRIGHT:
 			return this.fullBright;
+		case LEFT_HAND:
+			return this.leftHand;
 		default:
 			return false;
 		}
@@ -1265,6 +1272,8 @@ public class GameSettings extends ModData {
 					: (parOptions == GameSettings.Options.AF_LEVEL ? (this.ofAfLevel == 1 ? s + Lang.getOff() : s + this.ofAfLevel)
 					: (parOptions == GameSettings.Options.AA_LEVEL ? s + this.getAntialiasingString()
 					: "yee")))))))))))))))));
+		} else if (parOptions == GameSettings.Options.LEFT_HAND) {
+			return this.leftHand ? s + "Left" : s + "Right";
 		} else if (parOptions.getEnumBoolean()) {
 			boolean flag = this.getOptionOrdinalValue(parOptions);
 			return flag ? s + I18n.format("options.on", new Object[0]) : s + I18n.format("options.off", new Object[0]);
@@ -2081,6 +2090,10 @@ public class GameSettings extends ModData {
 						fullBright = Boolean.valueOf(astring[1]).booleanValue();
 					}
 					
+					if (astring[0].equals("leftHand") && astring.length >= 2) {
+						leftHand = Boolean.valueOf(astring[1]).booleanValue();
+					}
+
 					for (SoundCategory soundcategory : SoundCategory._VALUES) {
 						if (astring[0].equals("soundCategory_" + soundcategory.getCategoryName())) {
 							this.mapSoundLevels.put(soundcategory, Float.valueOf(this.parseFloat(astring[1])));
@@ -2275,6 +2288,7 @@ public class GameSettings extends ModData {
 			printwriter.println("voicePTTKey:" + this.voicePTTKey);
 			printwriter.println("enableFNAWSkins:" + this.enableFNAWSkins);
 			printwriter.println("fullbright:" + this.fullBright);
+			printwriter.println("leftHand:" + this.leftHand);
 
 			for (KeyBinding keybinding : this.keyBindings) {
 				printwriter.println("key_" + keybinding.getKeyDescription() + ":" + keybinding.getKeyCode());
@@ -2487,7 +2501,8 @@ public class GameSettings extends ModData {
 		HIDE_PASSWORD("Hide Password", false, false),
 		FNAW_SKINS("options.skinCustomisation.enableFNAWSkins", false, true),
 		EAGLER_VSYNC("options.vsync", false, true),
-		FULLBRIGHT("Fullbright", false, true);
+		FULLBRIGHT("Fullbright", false, true),
+		LEFT_HAND("Main Hand", false, true);
 
 		private final boolean enumFloat;
 		private final boolean enumBoolean;