Update orbit-camera.js

orbit-camera.js

@@ -581,7 +581,7 @@ OrbitCameraInputKeyboard.prototype.update = function (dt) {
         // Pitch (up/down) — Shift+Up => orbit up, Shift+Down => down
         var pitchDir = (up ? 0 : 1) - (dn ? 0 : 1); // up=+1, down=-1
         if (pitchDir !== 0) {
-            var dPitch = -(pitchDir * this.orbitPitchSpeedDeg * dt);
+            var dPitch = pitchDir * this.orbitPitchSpeedDeg * dt;
 
             var currPitch = this.orbitCamera.pitch;
             var currYaw   = this.orbitCamera.yaw;