drawing a 1 pixel thick line

[smurf]

How can I draw a simple 1-pixel thick line?
I've tried the obvious but it draws a 2-pixel thick line thats the wrong color! (I'm trying to draw it white but it comes out grey instead).

BTW I'm using the C# bindings if that matters.


Vertex[] line = new Vertex[2];
line[0].Position.X = 10;
line[0].Position.Y = 10;
line[0].Color.R = col.R;
line[0].Color.G = col.G;
line[0].Color.B = col.B;
line[0].Color.A = col.A;

line[1].Position.X = 10;
line[1].Position.Y = 100;
line[1].Color.R = col.R;
line[1].Color.G = col.G;
line[1].Color.B = col.B;
line[1].Color.A = col.A;

currentRenderTarget.Draw(line,0, 2, PrimitiveType.Lines);

[Ignatius_Z]

is anti-aliasing on it or something?

[smurf]

I don't think so.
I don't see anywhere to set anti-aliasing in regards to these lines.

[Laurent]

Try 10.5 and 100.5 for the points coordinates. I assume that you didn't change the view, nor resized the window.

[smurf]

Very interesting, thank you that worked!

Now the obvious next question, is there a global setting to add (or subtract) 0.5 from all line coordinates or something like that?

I'm trying to build a pixel-perfect drawing that is composed of lines, and all of my inputs and math is using integers. It would be really nice to have a global solution rather than adding 0.5 to everything all over the place.

Interestingly, when I draw a RectangleShape it doesn't have this problem.

[Laurent]

This only applies to points and lines primitives.

A simple solution would be to offset the whole view by (0.5, 0.5). But then you'll probably have troubles with other shapes (sprites, rectangles, ...). So adding the offset manually, only for lines and points, is probably the best solution.

[smurf]

Disappointing answer but I really appreciate your time (and your library) anyway!

Thanks,