Question

tl;dr demo with editor of the bounce function

^{点击将新球添加到该区域}

有一个question with over 200 votes on this topic得分不到一半的最佳答案。我注意到这一点，因为答案通常会超出问题范围。

我尝试将建议的代码转换为javascript。我的球小行星具有以下属性：

vx，vy - x轴和y轴的速度
x和y获取职位
mass以千克为单位，如果重要的话

我的代码因此读作：

  function bounce(objectA, objectB) { 
    /** objectA and objectB have following properties:
     *   vx, vy - speed in x and y direction
     *   x, y   - position
     *   mass   - masss
     *   radius - diameter, calculated from mass
     *            using average rock density according to wikipedia
   ***/  

    // Colision point as seen from B's perspective  
    var collision = [objectA.x-objectB.x, objectA.y-objectB.y];
    var distance = Math.sqrt(collision[0]*collision[0] + collision[1]*collision[1]);

    collision[0] /= distance;
    collision[1] /= distance;

    var aci = objectA.vx* collision[0] + objectA.vy* collision[1]; 
    var bci = objectB.vx* collision[0] + objectB.vy*collision[1]; 

    var totalMass = objectA.mass + objectB.mass;
    // This is what I had to add since the original answer doesn't account for mass
    var acf = bci * objectB.mass/totalMass;
    var bcf = aci * objectA.mass/totalMass;

    // I put velocities in arrays in case I wanted to apply more changes
    // I mean I need to apply some changes, but I don't know what changes exactly
    // to make this crap of code work
    var v1 = [(acf-aci) * collision[0], (acf-aci) * collision[1]]; 
    var v2 = [(bcf-bci) * collision[0], (bcf-bci) * collision[1]];     


    // Addition sure works better than assignment, but I encourage to try it for
    // the lulz
    objectA.vx += v1[0];
    objectA.vy += v1[1];
    objectB.vx += v2[0];
    objectB.vy += v2[1];
  }

现在在我的场景中，我观察到奇怪的行为。如果大球击中小球，小球快速飞走，但大球完全停止。足够大的球应该将小球推开而不会减速。

在这种情况下：

image description