What are these lines (curve.cpp, lines 76-79) supposed to do?

int xoffset = size_.x / (data_.size());

while(xoffset * data_.size() < (size_.x+xoffset))
    xoffset++;

When leaving the while loop uncommented, the function is stretched in the x direction.
I understand what those lines are supposed to achieve, but dont understand the approach used. I fixed this by rewriting the code to:

float xoffset = size_.x / (data_.size()-1);

/*while(xoffset * data_.size() < (size_.x+xoffset))
    xoffset++;*/

To recreate the error, simply trying to draw a plot of the function f(x)=x with 1000 points should suffice.

Examples:

All Examples render 200 Points with a Resolution of 0.1.

f(x)=x

Old Code

New Code

f(x)=sin(x) * 1/(1+x)

Old Code

New Code

Hi, I tried to run this code but this is the error I kept getting