Press n or j to go to the next uncovered block, b, p or k for the previous block.
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import "./ChallengeArea.css";
import Popup from '../popup/Popup';
// Character image
const imagesRight = ['char_right1.png', 'char_right2.png', 'char_right3.png'];
const imagesLeft = ['char_left1.png', 'char_left2.png', 'char_left3.png'];
const AttackRight = ['rightAtk1.png', 'rightAtk2.png', 'rightAtk3.png', 'rightAtk4.png', 'rightAtk6.png', 'rightAtk7.png', 'rightAtk8.png'];
const AttackLeft = ['leftAtk1.png', 'leftAtk2.png', 'leftAtk3.png', 'leftAtk4.png', 'leftAtk6.png', 'leftAtk7.png', 'leftAtk8.png'];
const stickAttackRight = ['rightStick1.png', 'rightStick2.png', 'rightStick3.png'];
const stickAttackLeft = ['leftStick1.png', 'leftStick2.png', 'leftStick3.png'];
const swordAttackRight = ['rightSword1.png', 'rightSword2.png', 'rightSword3.png'];
const swordAttackLeft = ['leftSword1.png', 'leftSword2.png', 'leftSword3.png'];
const lightingAnimationFrames = ['lighting1.png', 'lighting2.png', 'lighting3.png', 'lighting4.png', 'lighting5.png'];
// Boss image
const bossImagesLeft = ['wolfgoleft1.png', 'wolfgoleft2.png'];
const bossImagesRight = ['wolfgoright1.png', 'wolfgoright2.png'];
function ChallengeArea() {
// initial state
const [position, setPosition] = useState(5);
const [health, setHealth] = useState(100);
const [currentImage, setCurrentImage] = useState('char_right1.png');
const [direction, setDirection] = useState('right');
// get bought items
const [boughtItems, ] = useState(() => {
const saved = localStorage.getItem('boughtItems');
return saved ? JSON.parse(saved) : {};
});
// popup
const [showPopup, setShowPopup] = useState(false);
const [popupMessage, setPopupMessage] = useState({ title: '', body: '', background_color: ''});
// image index for animation
const imageIndex = useRef(0);
// magic state
const [isMagicAttack, setIsMagicAttack] = useState(false);
// state for mouse position for apply magic attack
const [mousePosition, setMousePosition] = useState({ x: 0, y: 0 });
// magic attack lighting
const [showLighting, setShowLighting] = useState(false);
const [lightingPosition, setLightingPosition] = useState({ x: 0, y: 0 });
const [currentLightingImage, setCurrentLightingImage] = useState('');
const lightingAnimationIndex = useRef(0);
// popup
const showCustomPopup = (title, body, background_color) => {
setPopupMessage({ title, body, background_color });
setShowPopup(true);
};
// boss state
const [bossPosition, setBossPosition] = useState(95); // Initial boss position
const [bossHealth, setBossHealth] = useState(100); // 新增Boss血量状态
const [currentBossImage, setCurrentBossImage] = useState('wolfgoleft1.png');
const bossImageIndex = useRef(0);
// Add boss attack power
const [bossAttackCooldown, setBossAttackCooldown] = useState(false);
const bossCooldownTime = 1000;
// Preload every pic
useEffect(() => {
[...imagesRight, ...imagesLeft,
...swordAttackRight, ...swordAttackLeft,
...AttackRight, ...AttackLeft,
...stickAttackRight, ...stickAttackLeft,
...bossImagesLeft, ...bossImagesRight].forEach(image => {
const img = new Image();
img.src = image;
});
}, []);
// Animation
useEffect(() => {
let attackAnimationInterval;
const updateImageForDirection = (dir) => {
const images = dir === 'right' ? imagesRight : imagesLeft;
setCurrentImage(images[imageIndex.current % images.length]);
imageIndex.current++;
};
// apply demage to boss
const applyDamageToBoss = (damageAmount) => {
setBossHealth((prevHealth) => Math.max(prevHealth - damageAmount, 0));
};
const handleKeyDown = (event) => {
// check if weapon is purchased
const isSwordAvailable = boughtItems['sword'];
const isStickAvailable = boughtItems['stick'];
const isBookAvailable = boughtItems['magicBook'];
switch(event.key) {
case "0": // Toggle magic attack
if (isBookAvailable) {
setIsMagicAttack(!isMagicAttack);
const magicImage = direction === 'right' ? 'rightMagic.png' : 'leftMagic.png';
setCurrentImage(magicImage);
} else {
showCustomPopup("Purchase Required", "You need to purchase the Magic Book to use this attack.", "rgba(243, 97, 105, 0.7)");
}
break;
case "9": // Sword attack
if (isSwordAvailable) {
if (!attackAnimationInterval) {
imageIndex.current = 0;
attackAnimationInterval = setInterval(() => {
const attackImages = direction === 'right' ? swordAttackRight : swordAttackLeft;
setCurrentImage(attackImages[imageIndex.current % attackImages.length]);
imageIndex.current++;
if (imageIndex.current === attackImages.length) {
clearInterval(attackAnimationInterval);
attackAnimationInterval = null;
applyDamageToBoss(15);
}
}, 150);
}
} else {
showCustomPopup("Purchase Required", "You need to purchase the Sword to use this attack.", "rgba(243, 97, 105, 0.7)");
}
break;
case "8": // Stick attack
if (isStickAvailable) {
if (!attackAnimationInterval) {
imageIndex.current = 0;
attackAnimationInterval = setInterval(() => {
const attackImages = direction === 'right' ? stickAttackRight : stickAttackLeft;
setCurrentImage(attackImages[imageIndex.current % attackImages.length]);
imageIndex.current++;
if (imageIndex.current === attackImages.length) {
clearInterval(attackAnimationInterval);
attackAnimationInterval = null;
applyDamageToBoss(10);
}
}, 150);
}
} else {
showCustomPopup("Purchase Required", "You need to purchase the Stick to use this attack.", "rgba(243, 97, 105, 0.7)");
}
break;
case "7": // Normal attack
if (!attackAnimationInterval) {
imageIndex.current = 0;
attackAnimationInterval = setInterval(() => {
const attackImages = direction === 'right' ? AttackRight : AttackLeft;
setCurrentImage(attackImages[imageIndex.current % attackImages.length]);
imageIndex.current++;
if (imageIndex.current === attackImages.length) {
clearInterval(attackAnimationInterval);
attackAnimationInterval = null;
applyDamageToBoss(5);
}
}, 150);
}
break;
case "a":
case "ArrowLeft":
setPosition(prevPosition => Math.max(prevPosition - 1, 0));
setDirection('left');
if (!attackAnimationInterval) {
updateImageForDirection('left');
}
break;
case "d":
case "ArrowRight":
setPosition(prevPosition => Math.min(prevPosition + 1, 100));
setDirection('right');
if (!attackAnimationInterval) {
updateImageForDirection('right');
}
break;
default:
break;
}
};
const handleKeyUp = (event) => {
if (["0", "7", "8", "9"].includes(event.key)) {
const transitionImage = direction === 'right' ? imagesRight[0] : imagesLeft[0];
setCurrentImage(transitionImage);
}
if (isMagicAttack) {
const magicImage = direction === 'right' ? 'rightMagic.png' : 'leftMagic.png';
setCurrentImage(magicImage);
}
if (attackAnimationInterval) {
clearInterval(attackAnimationInterval);
attackAnimationInterval = null;
}
};
window.addEventListener("keydown", handleKeyDown);
window.addEventListener("keyup", handleKeyUp);
return () => {
window.removeEventListener("keydown", handleKeyDown);
window.removeEventListener("keyup", handleKeyUp);
if (attackAnimationInterval) {
clearInterval(attackAnimationInterval);
}
};
}, [direction, boughtItems, isMagicAttack, position, bossHealth]);
// show use-magic icon with mouse
useEffect(() => {
const handleMouseMove = (event) => {
setMousePosition({ x: event.clientX, y: event.clientY });
};
window.addEventListener('mousemove', handleMouseMove);
return () => {
window.removeEventListener('mousemove', handleMouseMove);
};
}, []);
// Magic attack click
useEffect(() => {
const handleMouseClick = (event) => {
if (!isMagicAttack) return;
setShowLighting(true);
const lightingPos = { x: event.clientX, y: event.clientY };
setLightingPosition(lightingPos);
lightingAnimationIndex.current = 0;
setCurrentLightingImage(lightingAnimationFrames[lightingAnimationIndex.current]);
const intervalId = setInterval(() => {
lightingAnimationIndex.current += 1;
if (lightingAnimationIndex.current >= lightingAnimationFrames.length) {
setShowLighting(false);
clearInterval(intervalId);
// check collison
if (CharacterAttackCollision(lightingPos, bossPosition)) {
setBossHealth((prevHealth) => Math.max(prevHealth - 20, 0));
}
} else {
setCurrentLightingImage(lightingAnimationFrames[lightingAnimationIndex.current]);
}
}, 100);
return () => clearInterval(intervalId);
};
window.addEventListener('click', handleMouseClick);
return () => window.removeEventListener('click', handleMouseClick);
}, [isMagicAttack, bossPosition, bossHealth]);
// Boss Attack Collision detection function
const BossAttackCollision = (distance) => {
const collisionThreshold = 10;
return Math.abs(distance) <= collisionThreshold;
};
// Character Attack collision detection
const CharacterAttackCollision = (lightingPosition, bossPosition) => {
const gameArea = document.querySelector('.combat-background');
if (!gameArea) {
console.error('Game area not found');
return false;
}
const gameAreaWidth = gameArea.offsetWidth;
const gameAreaLeftEdge = gameArea.getBoundingClientRect().left;
const lightingPositionPercentage = ((lightingPosition.x - gameAreaLeftEdge) / gameAreaWidth) * 100;
const collisionThreshold = 10;
const distance = Math.abs(lightingPositionPercentage - bossPosition);
return distance <= collisionThreshold;
};
/* ------------- Boss Logic Start ------------ */
useEffect(() => {
const bossSpeed = 0.3; // boss move speed
const moveBoss = () => {
const distance = bossPosition - position;
// update boss position
if (distance < -12) {
setBossPosition(bossPosition => Math.min(bossPosition + bossSpeed, 100));
setCurrentBossImage(bossImagesRight[bossImageIndex.current % bossImagesRight.length]);
} else if (distance > 6) {
setBossPosition(bossPosition => Math.max(bossPosition - bossSpeed, 0));
setCurrentBossImage(bossImagesLeft[bossImageIndex.current % bossImagesLeft.length]);
}
bossImageIndex.current = (bossImageIndex.current + 1) % bossImagesLeft.length;
// set boss attack interval
if (!bossAttackCooldown && BossAttackCollision(distance)) {
if (bossHealth > 0){
setHealth(prevHealth => Math.max(prevHealth - 5, 0));
setBossAttackCooldown(true);
setTimeout(() => {
setBossAttackCooldown(false);
}, bossCooldownTime);
}
}
};
const intervalId = setInterval(moveBoss, 80);
return () => clearInterval(intervalId);
}, [position, bossPosition, bossAttackCooldown, bossHealth]);
/* ------------- Boss Logic End ------------- */
// check victory
useEffect(() => {
if (bossHealth === 0) {
showCustomPopup("Victory!", "Congratulations, you have defeated the boss!", "rgba(8,186,255, 0.7)");
}
}, [bossHealth]);
return (
<div className="challenge-page">
<Popup show={showPopup} onClose={() => setShowPopup(false)} message={popupMessage} />
<div className="combat-background">
{/* Character Health Bar */}
<div className="combat-health">
<img src="/heart.png" alt="" />
<div className="combat-health-bar">
<div className="combat-health-level" style={{ width: `${health}%` }}></div>
</div>
<span>{health}/100</span>
</div>
{/* Boss Health Bar */}
<div className="boss-health">
<span>{bossHealth}/100</span>
<div className="boss-health-bar">
<div className="boss-health-level" style={{ width: `${bossHealth}%` }}></div>
</div>
<img src="/wolf-icon.png" alt="" />
</div>
{/* Character */}
<div className="character" style={{ left: `${position}%`, backgroundImage: `url(${currentImage})` }}></div>
{/* Boss */}
{bossHealth > 0 &&(
<div className="boss" style={{ left: `${bossPosition}%`, backgroundImage: `url(${currentBossImage})` }}></div>
)}
{/* Conditional rendering for the magic icon */}
{isMagicAttack && (
<img className="use-magic-icon" src="UseLighting.png" alt="Use Lighting" style={{ position: 'absolute', left: mousePosition.x, top: mousePosition.y, transform: 'translate(-50%, -51%)' }} />
)}
{/* Conditional rendering for the lighting animation */}
{showLighting && (
<img className="lighting" src={currentLightingImage} alt="Lighting Animation" style={{ position: 'absolute', left: lightingPosition.x, top: lightingPosition.y, transform: 'translate(-50%, -80%)' }} />
)}
</div>
<div className="explain-text">
<span>Move Left <div className="keyboard-icon">A</div>/<div className="keyboard-icon">{"<"}-</div> Move Right <div className="keyboard-icon">D</div>/<div className="keyboard-icon">-{">"}</div></span>
<span>Normal Attack <div className="keyboard-icon">7</div> Stick Attack <div className="keyboard-icon">8</div> Sword Attack <div className="keyboard-icon">9</div></span>
<span>Open Magic State<div className="keyboard-icon">0</div>Magic Attack<div className="keyboard-icon">Mouse Click</div></span>
</div>
</div>
);
}
export default ChallengeArea; |