gamengine2d

The vector2d class is a class that holds a 2-dimensional vector with x and y components. To create a vector2d instance, you can use vector2d(x value, y value), and you can access the instance’s .x and .y attributes. If only 1 argument is provided, such as vector2d(60), then both components will be set to that value. If 2 arguments are provided, they are used for x and y respectively.

By taking v as vector2d(1, 4), the vector2d class supports:

• magnitude as a property that gets the magnitude of the vector — v.magnitude 

• sqr_magnitude as a property that gets the squared magnitude of the vector — v.sqr_magnitude

• normalize as a method that normalizes the vector in place — v.normalize()

• normalized as a property that returns a new normalized vector — v.normalized

• dot product as a method that takes another vector2d and returns the dot product of the vectors — v.dot(other vector2d object)

• addition of 2 vectors that adds each component of one vector to the corresponding component of the other — v + other vector2d object

• addition of a vector and a scalar that adds the scalar to each component of the vector — v + scalar

• subtraction of 2 vectors that subtracts each component of one vector from the corresponding component of the other — v - other vector2d object

• subtraction of a vector and a scalar that subtracts the scalar from each component of the vector — v - scalar

• multiplication of 2 vectors that multiplies each component of one vector with the corresponding component of the other — v * other vector2d object

• multiplication of a vector with a scalar that multiplies each component of the vector with the scalar — v * scalar

• division of 2 vectors that divides each component of one vector by the corresponding component of the other — v / other vector2d object

• division of a vector by a scalar that divides each component of the vector by the scalar — v / scalar

• converting the vector into a tuple as a method — v.totuple()

• creating a vector2d object from a tuple as a method — vector2d.fromtuple(tuple containing x and y values)

• copying a vector2d object and returning it into another variable as a method — v.copy() 

• negating the vector that multiplies both components by –1 — -v

The vector2d class has a built-in __repr__ method that returns a string like vector2d(x value, y value). You can also use vector2d.up as a property to get a vector2d object pointing upwards, same for down, right, and left. You can also use vector2d.one to get a vector2d object with both components equal to 1, and vector2d.zero to get a vector2d object with both components equal to 0.

The Color class is a class that has built in colors and functionality. It has an r, g, and b value for each instance. After creating a Color instance, you can access its .r, .g, and .b values. You can create a color class with rgb values using :

Color(r value, g value, b value). 

The Color class supports:

• getting color from hex values as a method -- Color.hex(hex code starting with #)

• comparing Color instances to see if they are the same color -- color_instance1 == color_instance2

• converting to hex as a method -- color_instance.to_hex()

• converting to rgb as a method -- color_instance.to_rgb()

The Color class also has built in colors like using Color.color_name, like:

• Color.black

• Color.white

• Color.red

• Color.green

• Color.blue

• Color.yellow

• Color.cyan

• Color.magenta

• Color.grey

• Color.light_grey

• Color.light_red

• Color.light_green

• Color.light_yellow

• Color.light_blue

• Color.orange

The Engine class is used to create the actual game engine object in order to create the game. It creates a new window with the scene when the instance's run() method is called. While creating an instance, the first argument is the width of the window (px) that will be created, the second argument is the height of the window (px), the resizable argument allows the user to select whether the window should be resizable or always have the same dimensions. The name argument becomes the name of the window created. the background_color argument is set as the background color for the window.