OpenGL points and lines

[rapademic]

Here is the version information of OpenGL I am using

OpenGL version: 3.1.0 - Build 8.15.10.2559
OpenGL vendor: Intel
OpenGL renderer: Intel(R) HD Graphics Family

The following code in my display callback is:
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(1.0f, 1.0f, 1.0f);
glBegin(GL_POINTS);
for(int r = 1; r < 250; ++r)
{
glVertex2i(2, r);
}
glEnd();

glColor3f(1.0f, 0.0f, 0.0f);
glBegin(GL_LINES);
glVertex2i(2, 1);
glVertex2i(2, 249);
glEnd();

This code should draw one line on top of the other but it renders the red line to the left of the white line. Can anyone explain this? Thanks.

[thokra]

First of all, please read the forum rules on how to format your posts - especially pieces of code.

Can you post a screen shot of what's rendered?

[ci5tbuptin1]

First of all, please read the forum rules on how to format your posts - especially pieces of code.

Can you post a screen shot of what&#39;s rendered?

up cho b?n

[rapademic]

No, I do not seem to have permission to attach files. Verbally this is what displays.
Bottom row of image: background
Next row of image: background pixel, red pixel, white pixel, background pixel, ...
Next row of image: background pixel, red pixel, white pixel, background pixel, ...
...

Horizontal lines do not have this offset problem, however I get one more horizontal point compared to plotting a line with the same coordinates.