Fix initial camera rotation to be looking at center, same as in EditorControls when you start to rotate (#801)

Author: vincentfretin

src/lib/cameras.js

@@ -39,7 +39,8 @@ export function initCameras(inspector) {
   perspectiveCamera.far = 10000;
   perspectiveCamera.near = 0.01;
   perspectiveCamera.position.set(0, 1.6, 2);
-  perspectiveCamera.lookAt(new THREE.Vector3(0, 1.6, -1));
+  const center = new THREE.Vector3(0, 1.6, 0); // same as in viewport.js
+  perspectiveCamera.lookAt(center);
   perspectiveCamera.updateMatrixWorld();
   sceneEl.object3D.add(perspectiveCamera);
   sceneEl.camera = perspectiveCamera;