World Effects?
World effects in augmented reality are effects that change the users surrounding environment while they are looking through the back camera of the device they are using.
In world effects, there are two different areas called camera space and world space. The camera space is what is in view of the camera where ever you are pointing it. Any objects that are placed here, (all are automatically but can be moved) will move with the view of the device. These objects are children of the camera in the scene panel. If you move the object, and make it so it is no longer a child of the camera, then it is now in world space. World space is where the object can be fixed in someones environment, not moving with the camera.
There are a few different kinds of world effects, and one of them is a target tracker. This is used to create effects that are triggered when he user points the devices camera at a certain image in the real world. This could be used on something like a movie poster, that creates a little dancing robot effect.
If using a target tracker, adding target markers are very important to add. A target marker is a semi-transparent preview of the target image, to help the user know where to look for the target in the real world. When the user find the real target, the target marker will disappear.
When making a target tracking effect it is important to keep a few things in mind. When choosing a target image, it is important to pick a high contrast, high resolution, image with sharp details and asymmetrical patterns and compositions. Also images that are complex, have flat surfaces on them, have a clear shape, and not a lot of blank space is very important. When placing the target in the world, it is important that the objects are large and that the user can get close to them easily for a long amount of time.
Another kind of world effect is the plane tracker. This is used to create effects that place 3D objects into the user’s environment. The plane tracker finds a surface in the real world, like a table or the floor, and objects that are a child of the plane tracker will be placed on that surface. These will be scene through only the back camera of the user’s device.
