Hi ,guys.
I want to add physics system to a character to make it move as a real person and use some 'ph_/phent_' commands in the lite-c script. But when running the code the model could do nothing but perform the 'walk' animation in the original place. The code is like this:

action walking_guard()
{
guard = my;

guard.material = mat_model;
phent_settype(guard,PH_RIGID,PH_SPHERE);
phent_setmass(guard,3,PH_SPHERE);
phent_setfriction(guard,80);

phent_setelasticity(guard,40,40);
phent_setdamping(guard,30,5);
ph_setgravity(vector(0,0,-386));

while(1)
{
if(key_w == 0 && key_s == 0 && key_e == 0)
{
ent_animate(my,"stand",walk_percentage, ANM_CYCLE);
walk_percentage += 3 * time_step;
}
else
{
if(key_e == 0)
{
ent_animate(my,"walk",walk_percentage, ANM_CYCLE);
walk_percentage += 5 * time_step;
}
}
}
}
Many thanks!!

Well, what are you supposing the entity to do, other than playing it's walk animation? Did you try letting another object collide with the entity?

Well, I'd like to let the entity only walk on the plane ground, that is, walk as a man. I suppose that the animation would be more vivid if physics system exists and 'walk' is a most basic action.

Did you apply any force to the object? The above shown code won't let your entity move, it will just animate it.

Yes, you will need to put some phent_addcentralforce() calls (or something similar) somewhere in your while loop to enable your entity to move.

But how is your entity going to keep it's balance? How tall is it compared to it's width or length? If it's taller than it is wide and/or long, then you'll need to find some way to keep your entity standing. Maybe you could apply your forces to the bottom of your entity via phent_addvellocal(), thereby minimizing the problem of keeping your entity standing.

Of course, you could just ignore what I said above if it doesn't apply to your case.

Thank Uhrwerk & MrCode!
As you two said,Yes. I've tried some commands just like phent_addvelcentral and phent_addcentralforce. But the entity never walked forward but roll forward or aside. I am really at a loss. The code I tried is like:


VECTOR guard_speed;
vec_set(guard_speed.x, nullvector);
guard_speed.x = 25 * (key_a - key_d);
guard_speed.y = 25 * (key_w - key_s);
phent_addvelcentral(guard, guard_speed); //roll
// phent_addcentralforce(guard, vector(50,0,0));//still roll

In fact I would appreciate you so much if there comes some code to make it from you.