help understand this exponential damage function?

Math and Physics Programming

Started by Daniel Bhagolie October 04, 2014 01:51 AM

3 comments, last by Daniel Bhagolie 9 years, 6 months ago

143

Author

October 04, 2014 01:51 AM

I am having a lot of trouble understanding how this person explained this section of the text book. I understand some of it but after a while it gets frustrating

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I understand everything up until they mention using

the 3 relations to figure out k1 k2 k3.

i dont know how they did it? So lost. D;

how did they solve for k1 k2 k3 using

100 = k1e^k2(1) +k3

1 = k1e^(0.1) + k3

k1 + k3 = 0

??? someone help? ive been looking for answers online. in forums. ive been looking for places to study how to solve this. but nothing ive learned or found covers this topic. or helps and I graduated high school already so I dont have a teacher to talk to. Dont go to college until next semester either.

DiegoSLTS

2,113

October 04, 2014 02:50 AM

It says he used Mathematica to solve the system. I'm not sure if there's an easy step-by-step method to solve that kind of problem, you can try replacing things but maybe you end up with weird things that aren't easily solved on paper. I guess Mathematica solve it doing aproximations and multiple iterations, I don't think that's important or the writer would have gone through all the steps.

Anyway, solving that on paper won't give you any real knowledge about game programming or programming in general, it's just a math problem.

Washu

7,836

October 04, 2014 05:02 AM

The writer of this text does not appear to understand what irrational numbers are... as according to him 1/3 is irrational since you cannot exactly represent it using finite decimal numbers.

In time the project grows, the ignorance of its devs it shows, with many a convoluted function, it plunges into deep compunction, the price of failure is high, Washu's mirth is nigh.

duckflock

1,585

October 04, 2014 07:11 AM

This is called an exponential fit. The easiest way to do an exponential fit is to transform your problem into a linear problem.

Take the logarithm of your target equation and do a least squares linear fit wrt the resulting equations.

All mathematical toolboxes I know of have built in support for such fits.

Daniel Bhagolie

143

Author

October 04, 2014 07:45 AM

It says he used Mathematica to solve the system. I'm not sure if there's an easy step-by-step method to solve that kind of problem, you can try replacing things but maybe you end up with weird things that aren't easily solved on paper. I guess Mathematica solve it doing aproximations and multiple iterations, I don't think that's important or the writer would have gone through all the steps.

Anyway, solving that on paper won't give you any real knowledge about game programming or programming in general, it's just a math problem.

Okay I understand now. Thank you.

help understand this exponential damage function?

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help understand this exponential damage function?

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