From 594c6ac8dceea4380db806d873d4208de0531b67 Mon Sep 17 00:00:00 2001
From: Seth Trowbridge <seth111@gmail.com>
Date: Sun, 10 Apr 2022 16:58:27 -0400
Subject: [PATCH] normals helper

---
 app.js | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

diff --git a/app.js b/app.js
index 0b960ce..828a556 100644
--- a/app.js
+++ b/app.js
@@ -1,7 +1,7 @@
 // @ts-check
 
 import * as T from 'three';
-//import { FaceNormalsHelper } from 'three/examples/jsm/helpers/FaceNormalsHelper.js';
+import { VertexNormalsHelper } from 'three/examples/jsm/helpers/VertexNormalsHelper.js';
 import { Scene } from './scene.js';
 import Region from "./region.js";
 
@@ -12,10 +12,11 @@ voxels[Region.I(0, 0, 0)] = true;
 let surfaceCubeGeometry = new T.BufferGeometry();
 let surfaceCubeObject = new T.Mesh(
     surfaceCubeGeometry,
-    new T.MeshPhongMaterial({color:0x666666, wireframe:false, flatShading:true, side:T.BackSide})
+    new T.MeshPhongMaterial({color:0x666666, wireframe:false, flatShading:true, side:T.DoubleSide})
 );
 
-//var vnh = new FaceNormalsHelper( surfaceCubeObject, 1, 0xff0000 );
+
+let surfaceCubeNormalHelper;
 
 let rebuildSurface = inVoxels =>
 {
@@ -23,9 +24,21 @@ let rebuildSurface = inVoxels =>
 
     surfaceCubeGeometry.setAttribute("position", new T.BufferAttribute(pos, 3));
     surfaceCubeGeometry.setIndex(ind);
+
+    surfaceCubeGeometry.computeVertexNormals();
+    if(surfaceCubeNormalHelper) surfaceCubeNormalHelper.update();
 };
 rebuildSurface(voxels);
 
+surfaceCubeNormalHelper = new VertexNormalsHelper( surfaceCubeObject, -0.2 );
+
+
+
+const hitHelper = new T.Mesh
+(
+    new T.BoxGeometry( 0.2, 0.2, 0.2 ),
+    new T.MeshBasicMaterial( {color: 0x00ff00} )
+);
 
 Scene({
     DOM:"canvas",
@@ -33,10 +46,15 @@ Scene({
     {   
         let light = new T.PointLight(0xffffff, 1, 100)
         light.position.set(5, 5, -5);
-        inScene.add(light)
+        inScene.add(light);
+
         inScene.add(surfaceCubeObject);
+
         inScene.add(new T.GridHelper(10, 10));
         inScene.add(new T.AxesHelper( 5 ));
+
+        inScene.add( hitHelper );
+        inScene.add( surfaceCubeNormalHelper );
     },
     Update(inScene, inScreen, inDelta)
     {
@@ -52,11 +70,13 @@ Scene({
                     if(hits[i].distance < hit.distance)
                     {
                         hit = hits[i];
+                        
                     }
                 }
                 index = Region.I(Math.floor(hit.point.x), Math.floor(hit.point.y), Math.floor(hit.point.z));
                 voxels[index] = true;
                 rebuildSurface(voxels);
+                hitHelper.position.set(hit.point.x, hit.point.y, hit.point.z);
                 console.log(index, hit);
             }
         }