From 00af52a66aba575be1cb7d24e7cec2cc6d45bf17 Mon Sep 17 00:00:00 2001
From: LabyStudio <labystudio@gmail.com>
Date: Mon, 31 Jan 2022 21:32:35 +0100
Subject: [PATCH] implement shading

---
 .../minecraft/client/render/BlockRenderer.js    |  7 ++++++-
 .../net/minecraft/client/render/Tessellator.js  | 17 ++++++++++++++++-
 src/js/net/minecraft/util/EnumBlockFace.js      | 16 ++++++++++++++++
 3 files changed, 38 insertions(+), 2 deletions(-)

diff --git a/src/js/net/minecraft/client/render/BlockRenderer.js b/src/js/net/minecraft/client/render/BlockRenderer.js
index 7a79512..030e1fc 100644
--- a/src/js/net/minecraft/client/render/BlockRenderer.js
+++ b/src/js/net/minecraft/client/render/BlockRenderer.js
@@ -43,13 +43,18 @@ window.BlockRenderer = class {
         let textureIndex = typeId;
         let minU = (textureIndex % 16) / 16.0;
         let maxU = minU + (16 / 256);
-        let minV = parseInt(textureIndex / 16); // TODO Math.round
+        let minV = Math.round(textureIndex / 16);
         let maxV = minV + (16 / 256);
 
         // Flip V
         minV = 1 - minV;
         maxV = 1 - maxV;
 
+        // Classic lightning
+        let brightness = 0.9 / 15.0 * 15 + 0.1;
+        let color = brightness * face.getShading();
+        this.tessellator.setColor(color, color, color);
+
         if (face === EnumBlockFace.BOTTOM) {
             this.addBlockCorner(world, face, minX, minY, maxZ, minU, maxV);
             this.addBlockCorner(world, face, minX, minY, minZ, minU, minV);
diff --git a/src/js/net/minecraft/client/render/Tessellator.js b/src/js/net/minecraft/client/render/Tessellator.js
index 738318c..810911b 100644
--- a/src/js/net/minecraft/client/render/Tessellator.js
+++ b/src/js/net/minecraft/client/render/Tessellator.js
@@ -2,8 +2,10 @@ window.Tessellator = class {
 
     constructor() {
         this.material = new THREE.MeshBasicMaterial({
+            vertexColors: THREE.VertexColors,
             color: 0xffffff,
-            side: THREE.BackSide
+            side: THREE.BackSide,
+            overdraw: 1
         });
     }
 
@@ -15,6 +17,13 @@ window.Tessellator = class {
         this.addedVertices = 0;
         this.vertices = [];
         this.uv = [];
+        this.colors = [];
+    }
+
+    setColor(red, green, blue) {
+        this.red = red;
+        this.green = green;
+        this.blue = blue;
     }
 
     addVertexWithUV(x, y, z, u, v) {
@@ -28,11 +37,17 @@ window.Tessellator = class {
         // Add UV
         this.uv.push(u);
         this.uv.push(v);
+
+        // Add colors
+        this.colors.push(this.red);
+        this.colors.push(this.green);
+        this.colors.push(this.blue);
     }
 
     draw(group) {
         let geometry = new THREE.BufferGeometry();
         geometry.setAttribute('position', new THREE.BufferAttribute(new Float32Array(this.vertices), 3));
+        geometry.addAttribute('color', new THREE.BufferAttribute(new Float32Array(this.colors), 3));
         geometry.setAttribute('uv', new THREE.BufferAttribute(new Float32Array(this.uv), 2));
         geometry.setIndex(new THREE.BufferAttribute(new Uint32Array([0, 2, 1, 0, 3, 2]), 1));
 
diff --git a/src/js/net/minecraft/util/EnumBlockFace.js b/src/js/net/minecraft/util/EnumBlockFace.js
index a356f49..08a8e6a 100644
--- a/src/js/net/minecraft/util/EnumBlockFace.js
+++ b/src/js/net/minecraft/util/EnumBlockFace.js
@@ -6,6 +6,22 @@ window.EnumBlockFace = class {
         this.z = z;
     }
 
+    getShading() {
+        return this.isXAxis() ? 0.6 : this.isYAxis() ? 1.0 : 0.8;
+    }
+
+    isXAxis() {
+        return this.x !== 0;
+    }
+
+    isYAxis() {
+        return this.y !== 0;
+    }
+
+    isZAxis() {
+        return this.z !== 0;
+    }
+
     static values() {
         return [
             EnumBlockFace.TOP,