The player of your game shall be able to extract a selection of the currently rendered camera image? This assethe t will assist you in implementing this feature.

This asset:

• right now just works for orthografic cameras, because it was initially implemented to get an extracted selection of a two dimensional image like the background or the current camera picture.
• is implemented to work independent from the plattform (mobile devices as well as PCs are supported).
• is based on the Unity3d UI system.

The usage of this asset should be very easy:

At the location Assets/Prefabs you will find the prefab Selector.prefab. Just drop this prefab onto the canvas gameobject in your scene and everything should already work.

As already mentioned in the previous chapter (s. WTF - What's the function?) this Asset is build to work with the default Unity3d UI system. To mark this system work you have to place a canvas gameobject in your scene. Furthermore the main camera should be configured to work with this system. For this you should specify the main camera as Render Camera and set the RenderMode of the Canvas to Screen Space - Camera.

The Scene Assets/Scenes/ReferenceImplementationTestScene shows the most simplistic use of this asset.

The MonoBehaviour SelectionContainer which is directly attached to the gameobject SelectionContainer which is a child game object of the Selector prefab has a method called public Color[] GrabSelectionImage() which returns the image selection as Color array.

To change the cursor images like the images for moving or scaling the selection you have to navigate to : Selector->SelectionContainer->Selection. On this gameobject you will find the attached MonoBehaviour InputPropertyContainer which will allow you to tweak the UI a little.

Possible settings are:

• Changing the cursor images
• the size bounds of the selection rect
• the distance threshold between the mousecursor and a corner of the selection rect which is used to determine that the user will scale instead of move the selection rect.

Also the texture of the selection rect itself can be changed by changing the material of the Seletion gameobject, which is attached to the Selector prfab.