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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,163 @@ | ||
| import Runner from "./Runner" | ||
| import { IS_HIDPI, getRandomNum } from "./varibles" | ||
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| export default class NightMode { | ||
| canvas!: HTMLCanvasElement | ||
| ctx!: CanvasRenderingContext2D | ||
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| spritePos!: Position | ||
| containerWidth!: number | ||
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| xPos = 0 | ||
| yPos = 30 | ||
| currentPhase = 0 | ||
| opacity = 0 | ||
| stars: any[] = [] | ||
| drawStars = false | ||
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| constructor(canvas: HTMLCanvasElement, spritePos: Position, containerWidth: number) { | ||
| this.canvas = canvas | ||
| this.ctx = canvas.getContext("2d")! | ||
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| this.spritePos = spritePos | ||
| this.containerWidth = containerWidth | ||
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| this.xPos = containerWidth - 50 | ||
| this.yPos = 30 | ||
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| this.placeStars() | ||
| } | ||
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| update(activated: boolean) { | ||
| // Moon phase. | ||
| if (activated && this.opacity === 0) { | ||
| this.currentPhase++ | ||
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| if (this.currentPhase >= NightMode.phases.length) { | ||
| this.currentPhase = 0 | ||
| } | ||
| } | ||
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| // Fade in / out. | ||
| if (activated && (this.opacity < 1 || this.opacity === 0)) { | ||
| this.opacity += NightMode.config.FADE_SPEED | ||
| } else if (this.opacity > 0) { | ||
| this.opacity -= NightMode.config.FADE_SPEED | ||
| } | ||
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| // Set moon positioning. | ||
| if (this.opacity > 0) { | ||
| this.xPos = this.updateXPos(this.xPos, NightMode.config.MOON_SPEED) | ||
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| // Update stars. | ||
| if (this.drawStars) { | ||
| for (let i = 0; i < NightMode.config.NUM_STARS; i++) { | ||
| this.stars[i].x = this.updateXPos(this.stars[i].x, NightMode.config.STAR_SPEED) | ||
| } | ||
| } | ||
| this.draw() | ||
| } else { | ||
| this.opacity = 0 | ||
| this.placeStars() | ||
| } | ||
| this.drawStars = true | ||
| } | ||
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| updateXPos(currentPos: number, speed: number) { | ||
| if (currentPos < -NightMode.config.WIDTH) { | ||
| currentPos = this.containerWidth | ||
| } else { | ||
| currentPos -= speed | ||
| } | ||
| return currentPos | ||
| } | ||
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| draw() { | ||
| let moonSourceWidth = this.currentPhase === 3 ? NightMode.config.WIDTH * 2 : NightMode.config.WIDTH | ||
| let moonSourceHeight = NightMode.config.HEIGHT | ||
| let moonSourceX = this.spritePos.x + NightMode.phases[this.currentPhase] | ||
| const moonOutputWidth = moonSourceWidth | ||
| let starSize = NightMode.config.STAR_SIZE | ||
| let starSourceX = Runner.spriteDefinition.LDPI.STAR.x | ||
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| if (IS_HIDPI) { | ||
| moonSourceHeight *= 2 | ||
| moonSourceHeight *= 2 | ||
| moonSourceX = this.spritePos.x + NightMode.phases[this.currentPhase] * 2 | ||
| starSize *= 2 | ||
| starSourceX = Runner.spriteDefinition.HDPI.STAR.x | ||
| } | ||
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| this.ctx.save() | ||
| this.ctx.globalAlpha = this.opacity | ||
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| // Stars. | ||
| if (this.drawStars) { | ||
| for (let i = 0; i < NightMode.config.NUM_STARS; i++) { | ||
| this.ctx.drawImage( | ||
| Runner.imageSprite, | ||
| starSourceX, | ||
| this.stars[i].sourceY, | ||
| starSize, | ||
| starSize, | ||
| Math.round(this.stars[i].x), | ||
| this.stars[i].y, | ||
| NightMode.config.STAR_SIZE, | ||
| NightMode.config.STAR_SIZE | ||
| ) | ||
| } | ||
| } | ||
|
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| // Moon. | ||
| this.ctx.drawImage( | ||
| Runner.imageSprite, | ||
| moonSourceX, | ||
| this.spritePos.y, | ||
| moonSourceWidth, | ||
| moonSourceHeight, | ||
| Math.round(this.xPos), | ||
| this.yPos, | ||
| moonOutputWidth, | ||
| NightMode.config.HEIGHT | ||
| ) | ||
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| this.ctx.globalAlpha = 1 | ||
| this.ctx.restore() | ||
| } | ||
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| placeStars() { | ||
| const segmentSize = Math.round(this.containerWidth / NightMode.config.NUM_STARS) | ||
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| for (let i = 0; i < NightMode.config.NUM_STARS; i++) { | ||
| this.stars[i] = {} | ||
| this.stars[i].x = getRandomNum(segmentSize * i, segmentSize * (i + 1)) | ||
| this.stars[i].y = getRandomNum(0, NightMode.config.STAR_MAX_Y) | ||
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| if (IS_HIDPI) { | ||
| this.stars[i].sourceY = Runner.spriteDefinition.HDPI.STAR.y + NightMode.config.STAR_SIZE * 2 * i | ||
| } else { | ||
| this.stars[i].sourceY = Runner.spriteDefinition.LDPI.STAR.y + NightMode.config.STAR_SIZE * i | ||
| } | ||
| } | ||
| } | ||
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| reset() { | ||
| this.currentPhase = 0 | ||
| this.opacity = 0 | ||
| this.update(false) | ||
| } | ||
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| static config = { | ||
| WIDTH: 20, // 半月的宽度 | ||
| HEIGHT: 40, // 月亮的高度 | ||
| FADE_SPEED: 0.035, // 淡入淡出的速度 | ||
| MOON_SPEED: 0.25, // 月亮的速度 | ||
| NUM_STARS: 2, // 星星的数量 | ||
| STAR_SIZE: 9, // 星星的大小 | ||
| STAR_SPEED: 0.3, // 星星的速度 | ||
| STAR_MAX_Y: 70 // 星星在画布上的最大 y 坐标 | ||
| } | ||
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| // 月亮所处的时期（不同的时期有不同的位置） | ||
| static phases = [140, 120, 100, 60, 40, 20, 0] | ||
| } |
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