32 lines
921 B
TypeScript
32 lines
921 B
TypeScript
module es {
|
||
/**
|
||
* 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
|
||
* 一般用法如下:
|
||
*
|
||
* let deltaMove = this.velocity * es.Time.deltaTime;
|
||
* deltaMove.x = this._x.update(deltaMove.x);
|
||
* deltaMove.y = this._y.update(deltaMove.y);
|
||
*/
|
||
export class SubpixelFloat {
|
||
public remainder: number = 0;
|
||
|
||
/**
|
||
* 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
|
||
* @param amount
|
||
*/
|
||
public update(amount: number){
|
||
this.remainder += amount;
|
||
let motion = Math.trunc(this.remainder);
|
||
this.remainder -= motion;
|
||
amount = motion;
|
||
return amount;
|
||
}
|
||
|
||
/**
|
||
* 将余数重置为0
|
||
*/
|
||
public reset(){
|
||
this.remainder = 0;
|
||
}
|
||
}
|
||
} |