Camera
******

Summary
=======

In the Scene view, there many ways to change the current view.
Here is a summary:

	* F: Frame an object
	* Q then Left mouse: Pan
	* Q then Right mouse: Look around
	* Hold ALT + Left mouse: Orbit
	* Hold ALT + Right mouse: Zoom in & out
	* Mouse wheel: Zoom in & out
	* Hold right Mouse + QWE/ASD: fly 
	
 
Setup
-----

	* Open the *Intro* scene
	* Delete any objects
	* Create a Plane and color it
	* Create three cubes and color them
	
	.. image:: three.png
		:scale: 50%
		
Frame an object
===============

	* Select the Translate/Rotate or Scale tool
	* Click on a cube in the scene view to select it
	* Press the **F** key to frame this object
	
	
	.. image:: frame.gif
		:scale: 80%
		 	
			
Zoom in and out
===============

	* You can use the mouse wheel
	* Hold ALT key + hold the right mouse button 
	
		* Wait for the cursor to turn into a magnifying glass
		* Move left and right

	.. image:: zoom.gif
		:scale: 80%
		
Pan
===

The camera will move up/down left/right

	* Press **Q** to activate the View tool, the cursor becomes a hand
	* Hold the left mouse button
	* Move in any direction
	

	.. image:: pan.gif
		 

Look around
===========

The camera rotates on itself, as if you were turning your head.

	* Press **Q** to activate the View tool
	* Hold the right mouse button, the cursor becomes an eye
	* Move in any direction
	
	.. image:: look.gif
		 
Orbit
=====

The camera rotates around like a satellite around the Earth.

 
	* Hold the **ALT** key + hold the left mouse button and move 
	
	.. image:: orbit.gif
	
Fly
===

This feature only makes sense if you are using an ENG keyboard mapping.

	* Hold the right mouse  button
	* Press A/D to move left and right
	* Press Q/E to move up and down
	* Press W/S to move forward and backward
	
	.. image:: fly.gif
	
Perspective and orthographic views
==================================

	* On the top-right corner, right-click the gizmo 
	
	.. image:: pers.png
		:scale: 50%
	
	* Disable Perspective to enter Isometric view (No distortion based on distance)
	
	.. image:: iso.png
		:scale: 40%

	* Click on the cone-shaped gizmos to activate different views:
	
		* Top / side / front / back views:
		
	.. image:: views.gif
	
	* Right-click the gizmo and **reactivate perspective**
	
	
	
 
Camera preview
==============

In Unity, the Camera GameObject is similar to a physical camera on a movie set.
Adjusting the camera's position, rotation, and field of view allows you to frame
your scene just as a cinematographer would.

 


	* In the Hierarchy, select the camera
	
	.. image:: camera.png
	  :scale: 40%
	
	* In the Inspector, note that the camera is an object like the others objects. It has:
		
		* A Transform node.
		* Some internal property.
		
	* In the toolbar at the bottom of Scene view, select the camera icon:
	
		.. image:: cameraicon.png
		   :scale: 60%
	
		* This opens a panel that previews what the camera sees:
	
		.. image:: previewcam.png
			:scale: 55%
		
		
	* In the Inspector, change the values of the field of view to 90°:
		
		.. image:: fov.png
			:scale: 55%

		.. image:: fov2.png
			:scale: 55%	
	
	* Reset value to 60
	
	* Select the Move tool
	
	* Select the camera and change its position  in the scene:
	
	
		.. image:: movecam.gif

	
Align camera with scene view
============================

	* Select the cube in the middle and press F to frame it
	
	* Zoom out to reduce its size
	
		.. image:: frameit.png
			:scale: 70%
			
	* Being very happy of this view, we would want the camera to capture the same
	
		* In the Hierarchy, right click on the camera and select **Allign with view**
		
		.. image:: aligned.png
			:scale: 60%
			
	* Press the Play button to see the result
	
		.. image:: camit.png
			:scale: 70%
	
	
	* Exit Play mode by pressing Stop button
		

Snap object
===========

-- optional --

When you create objects in your scene, you'll notice it's not always easy to align them perfectly with the ground.
To solve this problem, you have different options:

	* Make calculations and enter the exact x, y, z position
	* Being lucky
	* Slowly move the object while fully zoomed in, to position it as accurately as possible
	* Raise all objects above the ground and rely on gravity to make them fall and rest properly on the ground
	* Snap them
	
Snap to vertex
--------------	
	
	* Select the cube in the center and move it upward 
	* Adapt your view to see the gap between the cube and the ground
	
		.. image:: gap.png
			:scale: 50%
	

We now describe how to snap the cube:


	* Part 1: select a vertex of the cube
	
		* Check that the move tool is active
		* **Hold on the V key**
		* Move your cursor to one of the bottom vertices of the cube
		* **Click without releasing** on the bottom vertex you selected
		
			* Gizmos disappear
			* A thin yellow square appears

			.. image:: snap1.gif
				
								
	* Part 2: snap to vertex
		
		* Move your cursor to a vertex of another cube
		* See the results
		
			.. image:: snap2.gif
		
		
		
In case nothing goes as you wanted, perform an UNDO with CTRL+Z.