Hey guys I was wondering how I can stop the the FollowCamera from rotating around my player object?
I’ve tried a few things for so far no luck, I tried setting “followCamera.noRotationConstraint = false;”
But that did not work.
I just want the a camera that follows my player object along the x axis as it moves back and forth.
Any help would be great,
Thank you!
Hi P, sorry for the slow weekend replies.
Many or all BJS cameras have a .target and .lockedTarget properties, and often, they can be EITHER a mesh OR a Vector3 value.
Check out this playground: https://www.babylonjs-playground.com/#LN7YVL#4
Line 7… a standard freeCamera… but in line 25, AFTER the cylinder has been created… we can set the freeCamera .lockedTarget = cylinder. Mouse dragging turns-off because targeting is automated. But, notice that the arrow keys still change the position of the camera itself. The lockedTarget item remains the aim-at target.
Now let’s play with the ArcRotateCamera .lockedTarget. Disable line 7 freeCamera, and activate line 8 standard ArcRotateCamera. Leave line 25 as it is. Click run.
For this method, camera-drag with mouse… still “orbits” around target, like any good ArcCam, and arrow keys do the same. With no camera mouse or arrow keys camera.inputs… camera stays orbit-oriented to its lockedTarget. (a little different from the freeCamera)
And… most/all BJS cameras… allow you to change or remove “keys” property, and/or empty the camera.inputs array… removing player control, if wanted.
.target is almost as much fun as .lockedTarget, but you might need to do camera.target = cylinder… constantly, inside the scene’s render-loop, to get same affect as using .lockedTarget.
To make some code operate (repeatedly and fast) within the scene’s render-loop, many programmers use this method:
scene.onBeforeRenderObservable.add(function () {
your code here - runs once per render frame;
});
Do some experiments on various camera .target and .lockedTarget, even on the followCamera. There’s lots to be learned and plenty of fun, too.
FYI: I THINK… .noRotationConstraint … allows/prevents cameras from becoming upside-down. A within-playground-code SEARCH for noRotationConstraint… will show some examples of usage.
I hope this helps. Ask more things, comment at will, mark as solved, if you wish, we’re here to help, even if we are a bit slow on the weekends. 
Thanks Wingnut, I played around with it and got it to work. The trick was to use camera.targetLocked = myPlayer. Then I simply didn’t attach the camera controls and voila perfect 2D followcamera.
Thank you for the tips.
let followCamera = new BABYLON.FollowCamera("FollowCam", new BABYLON.Vector3(0, 0, -20), scene);
followCamera.radius = -50;
followCamera.cameraRotation = 0;
followCamera.heightOffset = 0;
followCamera.rotationOffset = 0;
followCamera.cameraAcceleration = 0.5;//0.005;
followCamera.maxCameraSpeed = 10;
let spriteManagerPlayer = new BABYLON.SpriteManager('player-manager', "./assets/sprites/ls-sprite-sheet.png", 112, 112, scene);
let player = new BABYLON.Sprite('player', spriteManagerPlayer);
player.width = 15;
player.height = 15;
player.cellIndex = 54;
followCamera.lockedTarget = background;
//REGISTER KEY INPUT EVENTS
let inputMap ={};
scene.actionManager = new BABYLON.ActionManager(scene);
scene.actionManager.registerAction(new BABYLON.ExecuteCodeAction(BABYLON.ActionManager.OnKeyDownTrigger, function (evt) {
inputMap[evt.sourceEvent.key] = evt.sourceEvent.type == "keydown";
}));
scene.actionManager.registerAction(new BABYLON.ExecuteCodeAction(BABYLON.ActionManager.OnKeyUpTrigger, function (evt) {
inputMap[evt.sourceEvent.key] = evt.sourceEvent.type == "keydown";
}));
scene.onBeforeRenderObservable.add(()=>{
let keydown = false;
if(inputMap["d"] || inputMap["ArrowRight"]){
player.position.x+=0.5;
keydown=true;
}
if(inputMap["a"] || inputMap["ArrowLeft"]){
player.position.x-=0.5;
keydown=true;
}
if(inputMap["w"] || inputMap["ArrowUp"]){
player.position.y+=0.5;
keydown=true;
}
if(inputMap["s"] || inputMap["ArrowDown"]){
player.position.y-=0.5;
keydown=true;
}
});
The only thing now is that the lockedTarget property on the camera doesn’t like the sprite as a target I get an error. I think the camera target only takes meshes as targets not sprites.
Mesh, OR a vector3 value, I believe. Test to be sure, of course. 
It’s good to hear of your successes, and thanks for sharing your solution! Well done!
Another solution is to change the lockedTarget’s billboardMode to USE_POSITION… This requires a separate camera-target mesh, which is actually a good idea anyway.
I originally added an empty camera-target mesh as a child of the player’s mesh, to adjust where the camera is looking at, since the player mesh’ origin is at the bottom, and I don’t want the camera to point at his feet. Since then, I’ve found other uses for this mesh, such as toggling between rotating/fixed camera, and some effects, like orbiting around the player.
To stop the camera rotating (while still following the player):
camera.locketTarget.billboardMode = Mesh.BILLBOARDMODE_USE_POSITION.