5. 2D Game Development: Sprites, Animation, and Collision Detection

Learning Objectives Define what a sprite is and place one on the screen using X and Y coordinates. Explain how animation creates the illusion of movement using different images (frames). Create a simple, two-frame animation for a sprite. Define collision detection and identify when it happens in a game. Write a simple algorithm using an 'if' statement to check if two sprites are touching. Use a variable to change a sprite's position on the screen. Describe the purpose of a game loop. Have you ever wanted to build your own video game where a character jumps to collect coins? 🚀 Let's learn the secrets to making game worlds come alive! In this lesson, we will discover the building blocks of 2D games. We'll learn about game characters, called 's...

TermDefinitionExample SpriteA sprite is any character, object, or item in your game. It's a single picture that you can move around on the screen.In a game, the main hero, a floating coin, and a walking enemy are all different sprites. Coordinates (X, Y)Two numbers that tell you the exact location of a sprite on the game screen. The X coordinate is for left and right, and the Y coordinate is for up and down.Setting a sprite's position to (X: 50, Y: 100) means it is 50 steps from the left edge and 100 steps from the top edge. AnimationThe trick of showing different pictures, or 'frames', one after another very quickly to make a sprite look like it's moving.To make a bird sprite fly, you would quickly switch between a picture of its wings up and a picture of its win...

Moving a Sprite with Variables sprite.x = sprite.x + 5 To move a sprite, you change its X or Y coordinate variable. To move right, you add to the X variable. To move left, you subtract. To move down, you add to the Y variable. To move up, you subtract. The Collision Check Algorithm if (player is touching coin) { // Do something! } This is the most important pattern for making games interactive. You use an 'if' statement to ask a question ('Are these two sprites touching?'). If the answer is yes, the code inside the curly braces runs. The Basic Animation Algorithm forever { switch to costume 'run1' wait 0.1 seconds switch to costume 'run2' wait 0.1 seconds } Inside a game loop (or a 'forever' block), you swit...