Popcorn Hacks:

Develop a basic combat system that allows characters to engage in battles with enemies. This will help you practice using functions, conditionals, and basic game mechanics in JavaScript.

Popcorn Hack Part 1 - 1: Using initializeData Function
  1. Add speed to the initializeData(data = null) function and give it a default value.
  2. Add seed to the HTML output.
  3. Add speed to the JSON data.
  4. Test calling initializeData with no argument, and then using a data JSON object as an argument.
Popcorn Hack Part 1 - 2: Adding IJKL Key Conditions in handleKeyDown
  1. Add a case statement for each of the IJKL keys in the handleKeyDown({ keyCode }) switch statement.
  2. Send the key code for each IJKL key to the gameObject.handleKeyDown method.
  3. Use console.log() to output gameObject.
Popcorn Hack 2: Creating a Simple Attack System
  1. Add a boolean variable named canAttack, and set it to false.
  2. Use an if statement to check if the player can attack.
  3. If canAttack is false, output “Can’t attack.”
  4. Use Math.random() to determine if the player is allowed to attack. (Tip: Use ChatGPT for help with Math.random() if needed!)
  5. This will pick a random number to decide if the attack can happen.
  6. Use console.log() for all outputs.
Popcorn Hack 3: Level Requirement Check
  1. Use the ternary operator to create an output if the player meets the level requirements.
  2. If not, output a message telling the player they are under-leveled.
  3. Use console.log() to print your output.

Homework:

Objectives


Option 1: Create a simple combat system.

  • Allow characters to fight enemies.
  • Use basic functions and conditionals in JavaScript.
  • Focus on making it easy to understand how battles work.


Option 2: Make a dialogue system for your NPC (Non-Player Character).

  • Use the prompt() function to ask the player for a response (choose a number from 1 to 4).
  • This dialogue should appear when the player gets close to the NPC and presses a button.

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Additional Tips:

  • For Option 1:
    • Start by writing down what the characters and enemies will be. Create simple names and attributes (like health).
    • Use console.log() to print out what's happening at each step. This will help you understand the flow of your code.
    • Look for example code online to see how others have created combat systems. Don't be afraid to borrow ideas!
  • For Option 2:
    • Plan out the dialogue options before you start coding. Write them down in a list.
    • Use comments in your code to remind yourself what each part does. For example, // Ask the player for a response.
    • Test your code frequently. After writing a few lines, run it to see if it works before adding more.

POPCORN HACK 1

%%html

<output id="output"></output>

<script>
function intializeData(data = null) {
    // Define default values
    let scaleFactor = 9/16;
    let animationRate = 1;
    let position = [0, 0];
    let speed = 17;

    // Check if data is provided
    if (data) {
        scaleFactor = data.SCALE_FACTOR || scaleFactor;
        animationRate = data.ANIMATION_RATE || animationRate;
        position = data.INIT_POSITION || position;
        speed = data.SPEED || speed;
    }

    document.getElementById("output").innerHTML = `
        <p>Scale Factor: ${scaleFactor}</p>
        <p>Animation Rate: ${animationRate}</p>
        <p>Initial Position: ${position}</p>
        <p>Speed: ${speed}<p>
    `;
}

var data = {
    SCALE_FACTOR: 1/1,
    ANIMATION_RATE: 25,
    INIT_POSITION: [100, 100],
    SPEED: 20
}

// Uncomment one of the following lines to test the if statement in the function
//intializeData();
intializeData(data);

</script>

POPCORN HACK 1 PART 2

%%js


// Popcorn Hack 1 - 2
class GameObject {
    constructor() {
        this.velocity = { x: 0, y: 0 };
        this.direction = '';
        this.xVelocity = 1;
        this.yVelocity = 1;
    }

    handleKeyDown({ keyCode }) {
        switch (keyCode) {
            case 87: // 'W' key
                this.direction = 'up';
                break;
            case 65: // 'A' key
                this.direction = 'left';
                break;
            case 83: // 'S' key
                this.direction = 'down';
                break;
            case 68: // 'D' key
                this.direction = 'right';
                break;
            case 73: // 'I' key
                this.direction = 'up';
                break;
            case 74: // 'J' key
                this.direction = 'left';
                break;
            case 75: // 'K' key
                this.direction = 'down';
                break;
            case 76: // 'L' key
                this.direction = 'right';
                break;
        }
    }
}

// Example of how to use it
const gameObject = new GameObject();
console.log('Initial State:', gameObject);

gameObject.handleKeyDown({ keyCode: 87 }); // Simulate 'W' key press
console.log('After W Key Press:', gameObject);

gameObject.handleKeyDown({ keyCode: 65 }); // Simulate 'A' key press
console.log('After A Key Press:', gameObject);

gameObject.handleKeyDown({ keyCode: 83 }); // Simulate 'S' key press
console.log('After S Key Press:', gameObject);

gameObject.handleKeyDown({ keyCode: 68 }); // Simulate 'D' key press
console.log('After D Key Press:', gameObject);

gameObject.handleKeyDown({ keyCode: 73 }); // Simulate 'I' key press
console.log('After I Key Press:', gameObject);

gameObject.handleKeyDown({ keyCode: 74 }); // Simulate 'J' key press
console.log('After J Key Press:', gameObject);

gameObject.handleKeyDown({ keyCode: 75 }); // Simulate 'K' key press
console.log('After K Key Press:', gameObject);

gameObject.handleKeyDown({ keyCode: 76 }); // Simulate 'L' key press
console.log('After L Key Press:', gameObject);

<IPython.core.display.Javascript object>

POPCORN HACK 2

%%js 

let canAttack = false;

if (!canAttack) {
    console.log("Can't attack.");
} else {
    if (Math.random() > 0.5) {
        console.log("Attack successful.");
    } else {
        console.log("Attack failed.");
    }
}

<IPython.core.display.Javascript object>

POPCORN HACK 3

%%js 

let playerLevel = 7; //Sample player level
let requiredLevel = 10; //Sample required level

let message = playerLevel >= requiredLevel ? "Player meets the level requirements." : "Player is under-leveled.";
console.log(message);

Homework (Chose Option 1 and incorporated random values so every attack has a different amount of damage)

%%js 
// Set up a character class
class Character {
    constructor(name, health, attackPower) {
        this.name = name; 
        this.health = health; 
        this.attackPower = attackPower; 
    }
    // Sample method of how to launch an attack on enemy
    attack(enemy) {
        if (this.health > 0) { 
            let randomAttackPower = Math.floor(Math.random() * this.attackPower) + 1; 
            console.log(`${this.name} attacks ${enemy.name} for ${randomAttackPower} damage.`);
            enemy.health -= randomAttackPower; 
            if (enemy.health <= 0) { // Check if the enemy is defeated
                console.log(`${enemy.name} has been defeated!`);
            } else {
                console.log(`${enemy.name} has ${enemy.health} health remaining.`);
            }
        } else {
            console.log(`${this.name} cannot attack because they are defeated.`);
        }
    }
}
// Create characters
let hero = new Character('Hero', 100, 10); 
let monster = new Character('Monster', 50, 5); 
// Simulate a battle through the previous classes I set up
hero.attack(monster); // Hero attacks monster
monster.attack(hero); // Monster attacks hero
hero.attack(monster); // Hero attacks monster again
monster.attack(hero); // Monster attacks hero again
hero.attack(monster); // Hero attacks monster again












<IPython.core.display.Javascript object>