tmp

package.json

@@ -40,4 +40,4 @@
       "last 1 safari version"
     ]
   }
-}
+}

src/App.tsx

@@ -1,9 +1,17 @@
 import React from 'react';
 import './App.css';
-
+import { vec3, vec4 } from "./render/math"
 
 function App() {
-  
+
+  let a: vec3 = new vec3([1, 1, 1]);
+  let b: vec3 = new vec3([3, 2, 1]);
+  let c: vec3 = new vec3([2, 3, 1]);
+  let d: vec3 = new vec3([1, 2, 3]);
+
+  let ab: vec3 = vec3.difference(b, a);
+
+  ab.print();
   return (
     <div className="App">
       sasa

src/render/math/Mat4.ts

@@ -70,10 +70,10 @@ export class mat4 {
         if (dest === null) {
             dest = new vec4();
         }
-        dest.x = this.values[index * 4 + 0],
-            dest.y = this.values[index * 4 + 1],
-            dest.z = this.values[index * 4 + 2],
-            dest.w = this.values[index * 4 + 3]
+        dest.x = this.values[index * 4 + 0];
+        dest.y = this.values[index * 4 + 1];
+        dest.z = this.values[index * 4 + 2];
+        dest.w = this.values[index * 4 + 3];
         return dest;
     }
 

src/render/math/Vec3.ts

@@ -202,6 +202,14 @@ export class vec3 {
         return length;
     }
 
+    public print(): void {
+        console.log("[ " + 
+            this.x + " " +
+            this.y + " " +
+            this.z
+        +" ]");
+    }
+
     /**
      * 向量缩放
      * @param vector