getAreaPosition 获取区域位置

getAreaPosition

类型: MethodDeclaration

所属类: ParticleElement

定义位置: animation.ts

描述

获取区域位置

返回值

类型: Float64Array

源代码

位置: 第 2277 行

private getAreaPosition(): Float64Array {
    const array = ParticleElement.sharedFloat64Array
    const emitter = this.emitter
    const area = this.data.area as ParticleEmissionAreaPoint | ParticleEmissionAreaRectangle | ParticleEmissionAreaCircle
    const cos = Math.cos(emitter.angle)
    const sin = Math.sin(emitter.angle)
    const x = area.x * emitter.scale
    const y = area.y * emitter.scale
    array[0] = x * cos - y * sin
    array[1] = x * sin + y * cos
    return array
  }

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文档生成时间：2025/7/21 20:53:39