A time question

[zarka]

have your tried to multiply this line by frametime as well ?

Code: [Select]

y += force - offset;

might solve it (not that i have look deeply into your code yet but if that doesn't work i will try to do that)

[dabo]

Didn't work. the variable force has already been multiplied with the frame time when we get to that line of code.

Code: [Select]

if(!standing)
force += gravity * frameRate;

[zarka]

Didn't work. the variable force has already been multiplied with the frame time when we get to that line of code.

Code: [Select]

if(!standing)
force += gravity * frameRate;

strange... oh well i'm heading home from work now i will see if i can have a look at it when i get home ...

[dabo]

ok, thanks.

[zarka]

i don't know if you fixed this alredy but i finaly managed to remember to check this whan i was home and able to ..
The problem is as others have pointed out this row:

Code: [Select]

y += force - offset;

The reason is that your MAX_FORCE constant is not time based .. meaning that when your force reaches MAX_FORCE it will be frame rate depandant and not frame time depandant as you whant it to be

so heres a solution:

Code: [Select]


//change it to a static const to keep c++ typesafety
static const float MAX_FORCE = 205.f;
...
//gravity should realy be a constant :)
const float gravity = 31.4f;
...
//and here we make sure it is kept time based
y += (force - offset) * frameRate;


now this should work fine