Removed P5 Vector

src/webgl/p5.Camera.js

@@ -1620,23 +1620,27 @@ class Camera {
 
     // Rotate the up vector to keep the correct camera orientation
     /* eslint-disable max-len */
-    let up = new p5.Vector(
-      this.upX * rotation.mat4[0] + this.upY * rotation.mat4[4] + this.upZ * rotation.mat4[8],
-      this.upX * rotation.mat4[1] + this.upY * rotation.mat4[5] + this.upZ * rotation.mat4[9],
-      this.upX * rotation.mat4[2] + this.upY * rotation.mat4[6] + this.upZ * rotation.mat4[10]
-    );
+
+    const rotatedUpX = this.upX * rotation.mat4[0] + this.upY * rotation.mat4[4] + this.upZ * rotation.mat4[8],
+    const rotatedUpY = this.upX * rotation.mat4[1] + this.upY * rotation.mat4[5] + this.upZ * rotation.mat4[9],
+    const rotatedUpZ =  this.upX * rotation.mat4[2] + this.upY * rotation.mat4[6] + this.upZ * rotation.mat4[10]
     /* eslint-enable max-len */
-    up.normalize()
+
+    //Normalize the up vector
+    const normalizedUpX = rotatedUpX / upLength;
+    const normalizedUpY = rotatedUpY / upLength;
+    const normalizedUpZ = rotatedUpZ / upLength;
+
     this.camera(
       this.eyeX,
       this.eyeY,
       this.eyeZ,
       rotatedCenter[0],
       rotatedCenter[1],
       rotatedCenter[2],
-      up.x,
-      up.y,
-      up.z
+      normalizedUpX,
+      normalizedUpY,
+      normalizedUpZ
     );
   }