fix water lightning

src/js/net/minecraft/client/world/Chunk.js

@@ -79,7 +79,14 @@ window.Chunk = class {
         if (y > currentHighestY) {
             highestY = y;
         }
-        while (highestY > 0 && Block.lightOpacity[this.getBlockAt(relX, highestY, relZ)] === 0) {
+        while (highestY > 0) {
+            let typeId = this.getBlockAt(relX, highestY, relZ);
+            let block = Block.getById(typeId);
+
+            if (typeId !== 0 && block.getOpacity() !== 0) {
+                break;
+            }
+
             highestY--;
         }
         if (highestY === currentHighestY) {
@@ -122,7 +129,11 @@ window.Chunk = class {
         let prevHeight = highestY;
         while (highestY > 0 && lightLevel > 0) {
             highestY--;
-            let opacity = Block.lightOpacity[this.getBlockID(relX, highestY, relZ)];
+
+            let typeId = this.getBlockID(relX, highestY, relZ);
+            let block = Block.getById(typeId);
+
+            let opacity = Math.floor(typeId === 0 ? 0 : block.getOpacity() * 255);
             if (opacity === 0) {
                 opacity = 1;
             }
@@ -130,10 +141,20 @@ window.Chunk = class {
             if (lightLevel < 0) {
                 lightLevel = 0;
             }
+
             this.setLightAt(EnumSkyBlock.SKY, relX, highestY, relZ, lightLevel);
         }
-        for (; highestY > 0 && Block.lightOpacity[this.getBlockID(relX, highestY - 1, relZ)] === 0; highestY--) {
+
+        while (highestY > 0) {
+            let typeId = this.getBlockID(relX, highestY - 1, relZ);
+            let block = Block.getById(typeId);
+
+            if (typeId !== 0 && block.isSolid()) {
+                break;
+            }
+            highestY--;
         }
+
         if (highestY !== prevHeight) {
             this.world.updateLight(EnumSkyBlock.SKY, x - 1, highestY, z - 1, x + 1, prevHeight, z + 1);
         }
@@ -168,7 +189,8 @@ window.Chunk = class {
         //this.data.setNibble(i, j, k, i1);
         //if (!this.worldObj.worldProvider.field_6478_e) {
 
-        if (Block.lightOpacity[byte0] !== 0) {
+        let block = Block.getById(typeId);
+        if (typeId !== 0 && block.isSolid()) {
             if (y >= height) {
                 this.updateHeightMap(x, y + 1, z);
             }

src/js/net/minecraft/client/world/World.js

@@ -112,7 +112,7 @@ window.World = class {
     }
 
     blockExists(x, y, z) {
-        if (y < 0 || y >= 128) {
+        if (y < 0 || y >= World.TOTAL_HEIGHT) {
             return false;
         } else {
             return this.chunkExists(x >> 4, z >> 4);
@@ -167,7 +167,7 @@ window.World = class {
     }
 
     getSavedLightValue(sourceType, x, y, z) {
-        if (!this.chunkExists(x >> 4, z >> 4)) {
+        if (!this.blockExists(x, y, z)) {
             return 15;
         }
 

src/js/net/minecraft/client/world/block/Block.js

@@ -1,9 +1,7 @@
 window.Block = class {
 
     static blocks = new Map();
-
-    static lightOpacity = [];
-
+    
     static create() {
         Block.STONE = new BlockStone(1, 0);
         Block.GRASS = new BlockGrass(2, 1);
@@ -22,9 +20,6 @@ window.Block = class {
 
         // Register block
         Block.blocks.set(id, this);
-        Block.lightOpacity[id] = this.isSolid() ? 255 : 0;
-
-        Block.lightOpacity[0] = 0;
     }
 
     getId() {

src/js/net/minecraft/client/world/block/BlockWater.js

@@ -5,7 +5,7 @@ window.BlockWater = class extends Block {
     }
 
     getOpacity() {
-        return 0.3;
+        return 0.93;
     }
 
     isSolid() {

src/js/net/minecraft/util/MetadataChunkBlock.js

@@ -32,7 +32,8 @@ window.MetadataChunkBlock = class {
                     let savedLightValue = world.getSavedLightValue(this.type, x, y, z);
                     let newLevel = 0;
                     let typeId = world.getBlockAt(x, y, z);
-                    let opacity = Block.lightOpacity[typeId];
+                    let block = Block.getById(typeId);
+                    let opacity = typeId === 0 ? 0 : block.getOpacity() * 255;
 
                     if (opacity === 0) {
                         opacity = 1;