32 lines
921 B
TypeScript
32 lines
921 B
TypeScript
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module es {
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/**
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* 它存储值，直到累计的总数大于1。一旦超过1，该值将在调用update时添加到amount中
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* 一般用法如下:
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*
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* let deltaMove = this.velocity * es.Time.deltaTime;
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* deltaMove.x = this._x.update(deltaMove.x);
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* deltaMove.y = this._y.update(deltaMove.y);
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*/
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export class SubpixelFloat {
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public remainder: number = 0;
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/**
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* 以amount递增余数，将值截断，存储新的余数并将amount设置为当前值
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* @param amount
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*/
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public update(amount: number){
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this.remainder += amount;
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let motion = Math.trunc(this.remainder);
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this.remainder -= motion;
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amount = motion;
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return amount;
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}
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/**
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* 将余数重置为0
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*/
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public reset(){
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this.remainder = 0;
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}
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}
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}
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