按时间适当缩放模拟

“scale”是您试图用来更改时间步长的变量吗?

如果是这样的话,这应该会影响mom和pos的更新方式。所以你可以先更换

mom -= grav;
pos += mom;

具有

mom -= grav*scale;
pos += mom*scale;

也许这个伪代码有帮助。。

const float timestep = 0.01; // this is how much time passes every iteration
                             // if it is too high, your simulation
                             // may be inaccurate! If it is too low, 
                             // your simulation will run unnecessarily
                             // slow!

float x=0; //this is a variable that changes over time during your sim.
float t=0.0; // this is the current time in your simulation

for(t=0;t<length_of_simulation;t+=timestep) {
    x += [[insert how x changes here]] * timestep;
}