248 lines
7.0 KiB
TypeScript
248 lines
7.0 KiB
TypeScript
import type Phaser from 'phaser'
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import { GameManager } from '../GameManager'
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import { HUD_HEIGHT, PATH_WAYPOINTS } from '../constants'
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import { getCellSize } from '../mapRenderer'
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export interface PathPoint { x: number; y: number }
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function gridToPixel(gx: number, gy: number, cellW: number, cellH: number): PathPoint {
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return {
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x: gx * cellW + cellW / 2,
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y: gy * cellH + cellH / 2 + HUD_HEIGHT,
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}
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}
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export function buildFullPath(): PathPoint[] {
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const { cellW, cellH } = getCellSize()
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const points: PathPoint[] = []
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for (let i = 0; i < PATH_WAYPOINTS.length - 1; i++) {
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const from = gridToPixel(PATH_WAYPOINTS[i].x, PATH_WAYPOINTS[i].y, cellW, cellH)
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const to = gridToPixel(PATH_WAYPOINTS[i + 1].x, PATH_WAYPOINTS[i + 1].y, cellW, cellH)
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points.push(from)
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points.push(to)
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}
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return points.filter(
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(p, i, arr) => i === 0 || p.x !== arr[i - 1].x || p.y !== arr[i - 1].y
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)
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}
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export interface DotEffect { damage: number; duration: number; timer: number }
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export abstract class EnemyBase {
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protected scene: Phaser.Scene
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protected imageSprite!: Phaser.GameObjects.Image
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// expose for tower targeting & health bar
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public x: number = 0
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public y: number = 0
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protected healthBar!: Phaser.GameObjects.Graphics
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protected quoteText!: Phaser.GameObjects.Text
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public maxHp: number
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public hp: number
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public speed: number
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public readonly kpiDamage: number
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public readonly hcReward: number
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protected spriteKey: string
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protected pathPoints: PathPoint[]
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protected currentPathIndex: number = 0
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public isDead: boolean = false
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public isActive: boolean = true
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get pathProgress(): number { return this.currentPathIndex }
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public dotEffects: DotEffect[] = []
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public slowEffect: number = 0
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public slowTimer: number = 0
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public shieldCount: number = 0
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protected cellW: number
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protected cellH: number
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constructor(
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scene: Phaser.Scene,
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pathPoints: PathPoint[],
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maxHp: number,
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speed: number,
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kpiDamage: number,
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hcReward: number,
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spriteKey: string
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) {
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this.scene = scene
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this.pathPoints = pathPoints
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this.maxHp = maxHp
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this.hp = maxHp
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this.speed = speed
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this.kpiDamage = kpiDamage
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this.hcReward = hcReward
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this.spriteKey = spriteKey
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const { cellW, cellH } = getCellSize()
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this.cellW = cellW
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this.cellH = cellH
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if (pathPoints.length > 0) {
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this.x = pathPoints[0].x
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this.y = pathPoints[0].y
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}
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// 用 AI 图片精灵，精确设为格子尺寸的 75%（怪物比塔小一点）
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const enemySize = cellW * 0.75
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this.imageSprite = scene.add.image(this.x, this.y, spriteKey)
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this.imageSprite.setDisplaySize(enemySize, enemySize)
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this.imageSprite.setDepth(10)
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this.healthBar = scene.add.graphics()
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this.quoteText = scene.add
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.text(this.x, this.y - 30, this.getQuote(), {
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fontFamily: 'VT323, monospace',
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fontSize: '13px',
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color: '#FFFFFF',
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backgroundColor: 'rgba(0,0,0,0.7)',
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padding: { x: 4, y: 2 },
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})
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.setOrigin(0.5, 1)
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.setDepth(15)
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.setAlpha(0)
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this.drawHealthBar()
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// 出生后 0.5s 显示语录
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scene.time.delayedCall(500, () => { if (!this.isDead) this.showQuote() })
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}
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update(delta: number): void {
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if (this.isDead || !this.isActive) return
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this.processDOT(delta)
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if (this.slowTimer > 0) {
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this.slowTimer -= delta
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if (this.slowTimer <= 0) this.slowEffect = 0
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}
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this.moveAlongPath(delta)
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this.imageSprite.setPosition(this.x, this.y)
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this.drawHealthBar()
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if (this.quoteText?.alpha > 0) {
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this.quoteText.setPosition(this.x, this.y - (this.cellH * 0.45))
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}
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}
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protected processDOT(delta: number): void {
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for (let i = this.dotEffects.length - 1; i >= 0; i--) {
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const dot = this.dotEffects[i]
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dot.timer -= delta
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this.hp -= (dot.damage / 1000) * delta
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if (this.hp <= 0) { this.die(); return }
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if (dot.timer <= 0) this.dotEffects.splice(i, 1)
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}
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}
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protected moveAlongPath(delta: number): void {
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if (this.currentPathIndex >= this.pathPoints.length - 1) {
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this.reachEnd(); return
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}
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const target = this.pathPoints[this.currentPathIndex + 1]
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const currentSpeed = this.speed * (1 - this.slowEffect)
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const distance = (currentSpeed * delta) / 1000
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const dx = target.x - this.x
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const dy = target.y - this.y
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const dist = Math.sqrt(dx * dx + dy * dy)
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if (dist <= distance) {
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this.x = target.x; this.y = target.y
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this.currentPathIndex++
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} else {
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this.x += (dx / dist) * distance
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this.y += (dy / dist) * distance
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}
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// 减速时图片变色
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if (this.slowEffect > 0) {
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this.imageSprite.setTint(0x93c5fd)
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} else {
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this.imageSprite.clearTint()
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}
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}
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protected drawHealthBar(): void {
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this.healthBar.clear()
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const bw = this.cellW * 0.5
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const bh = 5
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const bx = this.x - bw / 2
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const by = this.y - this.cellH * 0.45
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const ratio = Math.max(0, this.hp / this.maxHp)
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const color = ratio > 0.5 ? 0x22c55e : ratio > 0.25 ? 0xf59e0b : 0xef4444
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this.healthBar.fillStyle(0x1f2937, 1)
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this.healthBar.fillRect(bx, by, bw, bh)
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this.healthBar.fillStyle(color, 1)
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this.healthBar.fillRect(bx, by, bw * ratio, bh)
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this.healthBar.setDepth(14)
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}
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takeDamage(damage: number): void {
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if (this.isDead) return
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if (this.shieldCount > 0) {
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this.shieldCount--
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this.showShieldBlock()
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return
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}
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this.hp -= damage
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this.drawHealthBar()
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if (this.hp <= 0) this.die()
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}
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private showShieldBlock(): void {
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const txt = this.scene.add
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.text(this.x, this.y - 35, '护盾!', {
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fontFamily: 'VT323, monospace', fontSize: '14px', color: '#93C5FD',
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}).setOrigin(0.5, 1).setDepth(20)
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this.scene.tweens.add({
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targets: txt, y: this.y - 55, alpha: 0, duration: 800,
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onComplete: () => txt.destroy(),
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})
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}
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addDOT(damage: number, duration: number): void {
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this.dotEffects.push({ damage, duration, timer: duration })
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}
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addSlow(percent: number, duration: number): void {
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this.slowEffect = Math.max(this.slowEffect, percent)
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this.slowTimer = Math.max(this.slowTimer, duration)
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}
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protected die(): void {
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if (this.isDead) return
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this.isDead = true
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GameManager.getInstance().addHC(this.hcReward)
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this.onDeath()
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this.destroy()
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}
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protected reachEnd(): void {
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if (this.isDead) return
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GameManager.getInstance().reduceKPI(this.kpiDamage)
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this.isDead = true
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this.destroy()
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}
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protected onDeath(): void {}
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showQuote(): void {
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if (this.isDead || !this.quoteText) return
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this.quoteText.setText(this.getQuote())
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this.quoteText.setPosition(this.x, this.y - this.cellH * 0.45)
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this.quoteText.setAlpha(1)
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this.scene.tweens.add({
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targets: this.quoteText, alpha: 0,
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duration: 800, delay: 2200, ease: 'Linear',
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})
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}
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abstract getQuote(): string
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destroy(): void {
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this.imageSprite?.destroy()
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this.healthBar?.destroy()
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this.quoteText?.destroy()
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}
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}
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