What is a Camera?

Create the Camera class.

You will need to create a class that has two instance variables: x-offset and y-offset.

Create camera’s update method.

The Camera class will be using the update method to calculate the x and y offset based on the position of the ship.

Create camera’s apply method.

The apply method will be used to adjust the rects of the objects that are taken in as a parameter. The objects' rects must be repositioned relative to the ship by adding the camera's x and y offset.

Putting it all together.

To get the camera working, you will need to create a Camera object. You will then need to create a for loop that will iterate through the platforms in the platform_group. As the loop is iterating, each platform's image will be blitted at it's rect after it's been passed to the camera's apply method. Remember, that all objects need to go through the camera's apply method, even the ship!

Review the Camera class.

Create a smart camera that doesn’t update x_offset when the ship goes to the far right side.

You need to calculate what will be the value of the x_offset when the inner window reaches the right side of the world. Then, you need to create a branch statement that will stop the offset from increasing when the ship reaches that point on the x-axis.

Create a smart camera that doesn’t update y_offset when the camera_entity is at the bottom of the screen.

You need to calculate what will be the value of the y_offset when the inner window is at the bottom of the world. Then, you need to create a branch statement that will stop the offset from increasing when the ship is in that bottom portion of the screen.

What is a Camera_Entity?

Make the camera follow the camera_entity on the y-axis and the ship on the x-axis.

You will need to change the Camera's update method to take in two arguments: the ship and the camera_entity. The calculation of the y_offset must be done using the y position of the camera_entity and the x position using the ship.

Cause the camera to move upwards a few seconds after the game starts to give the player a moment to get ready.

To accomplish this, you will need to change the starting position of the camera_entity.

Add an instance variable to the Camera_entity class called 'is_moving', that will be set to True when the screen is moving and False otherwise.

To accomplish this task, you will need to add a few branch statements that will check if the camera_entity's y position is less than at height - WIN_H/2, at which point 'is_moving' will be set to True. You also need to check if the camera_entity's y position is at less than WIN_H/2, at which 'is_moving' must be set to False.