You aim to create several swappable camera control scripts for a top-down terraforming simulator.
Here is the document covered in class that details the type of camera controllers you are to implement for this exercise:
Scroll Back: The Theory and Practice of Cameras in Side-Scrollers by Itay Keren.
The images in the Exercise Stages section are taken from Itay Karen's document.
Stages 1, 2, 3, and 4 are worth 15 points each. Stage 5 is worth 10 points. The stages are worth a total of 70 points. The remaining 30 points are for your peer review of another student's submission.
See Canvas for the due date. This exercise will be submitted on GitHub Classroom. The master branch, as found on your individual exercise repository, will be evaluated.
The following are the basic criteria for each stage:
- Each stage requires you to implement a type of camera controller.
- The
Player
GameObject
in the scene should always be referenced in theTarget
serialized field. - Each of your five controllers should inherit
AbstractCameraController
and be in theObscura
namespace. - Each camera controller implementation should be added as a component to the
Main Camera
object in the hierarchy. - You should bind the
Player
GameObject
to theTarget
serialized field via the editor for each one of your cameras. - Only one camera controller script on
Main Camera
should be enabled at a time. (You can disable aGameObject
component by unchecking the box next to the component's name.) - Most controllers will require you to expose fields to the Unity inspector to allow a designer to parameterize the controller's function (e.g., the size of a bounding box, the speed of scrolling, the rate of lerping, etc.). Each controller has its own list of required fields to serialize. Serialized variables should be
private
unless there is a particular need for them to have another access modifier. You can serialize any field in a C# class by prepending a[SerializeField]
meta-tag before the field's declaration. This can be seen in the abstract class 'AbstractCameraController'. - Each camera controller should use the
LineRenderer
required component to visualize the camera controller's logic when theDrawLogic
serialized field is true. The lines should be drawn at the samez
value as thePlayer
GameObject
. See thePushBoxCamera
class for an example. - Your camera controllers should be immediately testable by your peer-reviewer and should have
DrawLogic
set to true by default and in your submitted project.
This camera controller should always be centered on the GameObject
referenced by the target
member variable. There are no additional fields to be serialized and usable in the inspector.
Your controller should draw a 5 by 5 unit cross in the center of the screen when DrawLogic
is true.
as found in Terraria, ©2011 Re-Logic.
In the grand tradition of shmups, this camera controller implements a frame-bound autoscroller. The target should be able to move inside of a box, constantly moving along the positive x-axis. If the target is lagging behind and is touching the left edge of the box, the target should be pushed forward by that box edge.
Your controller should draw the frame border box when DrawLogic
is true.
Required serialized fields:
Vector2 topLeft
- the top left corner of the frame border box.Vector2 bottomRight
- the bottom right corner of the frame border box.float autoScrollSpeed
- the number of Unity units per second to scroll.
as found in Scramble, ©1981 Konami.
This camera controller generally behaves like the position lock controller from Stage 1. The major difference is that it does not immediately center on the target as the target moves. Instead, it moves the camera's position toward the target's position on LateUpdate()
with the target's speed times the followSpeedFactor
(see below). When the distance between the target and the camera reaches leashDistance
, the camera should move a the same speed as the target. When the target is not moving, the camera should move toward the target with catchUpSpeed
. The camera should not move when the target is not moving and the camera and the target are in the same position.
Your controller should draw a 5 by 5 unit cross in the center of the screen when DrawLogic
is true.
You may use lerp to manage camera motion.
Required serialized fields:
float followSpeedFactor
- The fraction of the target's movement speed that is set to the camera's chasing speed.float leashDistance
- The camera should move at the same speed as the target when they areleashDsitance
apart.float catchUpSpeed
- The camera should movecatchUpSpeed
toward the target when the target is not moving.
as found in Super Meat Boy, ©2010 Team Meat.
This stage requires you to create a variant of the position-lock focus-smoothing controller. The variation is that the center of the camera leads the target in the direction of the target's movement. The position of the camera should move ahead of the target. This controller should update when movement input is given. When the target is not moving, the camera should not move until IdleDuration
seconds have elapsed and should move toward the target with returnSpeed
. The camera should not exceed leadMaxDistance
from the target.
Your controller should draw a 5 by 5 unit cross in the center of the screen when DrawLogic
is true.
You may use lerp to manage camera motion.
Required serialized fields:
float idleDuration
- the duration between when the target stops moving and when the camera begins to return to the target.float returnSpeed
- the speed with which the camera returns to the target.float leadSpeedMultiplier
- the multiplier applied to the target's speed that the camera moves toward the direction of the input.float leadMaxDistance
- the maximum distance between the camera and the target in the x and y plane. Do not include z plane values in this distance calculation.
as found in Jazz Jackrabbit 2, ©1998 Epic Games.
This camera controller should implement a 4-directional version of the speedup push zone as seen in Super Mario Bros. The controller should move at the speed of the Player
multiplied by the PushRatio
required serialized field in the direction of the target's movement when the target is 1) moving and 2) not touching the outer push zone border box. When the target is touching one side of the push zone border box, the camera will move at the target's current movement speed in the direction of the touched side of the border box and at the PushRatio
in the other direction (e.g., when the target is touching the top middle of the pushing box but is moving to the upper right, the camera will move at target speed in the y direction but at the PushRatio
in the x direction). If the target is touching two sides of the speedup push box (i.e., the target is in the corner of the box), the camera will move at full target speed in both x and y directions. To get the current speed or direction of the target, call the GetCurrentSpeed()
and GetMovementDiection()
methods from the PlayerController
, respectively.
Your controller should draw the push zone border box when DrawLogic
is true.
Required serialized fields:
float pushRatio
- the ratio that the camera should move in the direction of thePlayer
when it is not at the edge of the push zone border box.Vector2 topLeft
- the top left corner of the push zone border box.Vector2 bottomRight
- the bottom right corner of the push zone border box.