PyGame Physics Engine

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Description:

This is my OCR A Level Cousework. It is a simple, lightweight 2D physics solver written in Python using the PyGame library. It will have functionality to Pause, Play and Save keyframes from the simulation, allowing for collaboration on projects by multiple people.

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Classes:

• UDim2: A lightweight class that allows positioning of UI elements using percentages and a pixel offset.

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• Vector2: PyGame's 2D vector class that is used to position vertices and every element on the screen.

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• UIBase: A UI Wrapper that simplifies creation and management of UI. Has several internal SubClasses that affect rendering.

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i. Workspace⭢ The ancestor of all RigidBodies.

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ii. Rectangle⭢ A basic rectangle.

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iii. Ellipse⭢ An ellipse.

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iv. Polygon⭢ A polygon that must be convex that allows for Rotation and the setting of Vertices as UDim2 values.

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• Interface: Inherits from UIBase and has several internal SubClasses that affect rendering. It adds functionality for BackgroundColour, OutlineColour and TextColour where applicable. SubClasses are:

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iii. ImageLabel⭢ A label that displays an image. Introduces new attribute:

a. "Image"⭢ The file to be displayed.

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iv. ImageButton⭢ A label that displays an image and has a callback for clicks. Introduces new attributes:

a. "Image"⭢ The file to be displayed.
b. "Callback"⭢ The function to be ran every time the image is clicked.

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• RigidBody: Inherits from UIBase. It allows for the efficient creation and manipulation of RigidBodies and allows for Physics interactions with them. They must be a descendant of the Workspace when they are parented. Has one internal SubClass:

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i. Polygon⭢ A polygon that must be convex and allow for Rotation, setting Vertices. Due to it being a RigidBody Physics is applied to it. Introduces several new attributes:

a. "Position"⭢ The Velocity of the RigidBody, as a Vector2

b. "Velocity"⭢ The Velocity of the RigidBody.

c. "Acceleration"⭢ The Acceleration of the RigidBody.

d. "AngularVelocity"⭢ The Velocity of the RigidBody.

e. "AngularAcceleration"⭢ The Acceleration of the RigidBody.

f. "AddForce"⭢ Allows for you to manipulate the acceleration.

g. "AddImpulse"⭢ Allows for you to manipulate the acceleration (for one frame).

h. "Mass"⭢ An optional attribute that affects collisions.

Timeline

Redoing the SAT and polygon clipping for the third time while working around UCAS.