### Author Topic: A time question  (Read 10000 times)

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#### zarka

• Jr. Member
• Posts: 81
##### A time question
« Reply #15 on: October 01, 2008, 04:21:45 pm »
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)
//Zzzarka

#### dabo

• Sr. Member
• Posts: 260
##### A time question
« Reply #16 on: October 01, 2008, 05:29:11 pm »
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

• Jr. Member
• Posts: 81
##### A time question
« Reply #17 on: October 01, 2008, 06:12:05 pm »
Quote from: "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;`

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 ...
//Zzzarka

#### dabo

• Sr. Member
• Posts: 260
##### A time question
« Reply #18 on: October 01, 2008, 09:43:37 pm »
ok, thanks.

#### zarka

• Jr. Member
• Posts: 81
##### A time question
« Reply #19 on: October 08, 2008, 08:12:38 pm »
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++ typesafetystatic 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 basedy += (force - offset) * frameRate;`

now this should work fine
//Zzzarka

anything