One Pixel Unit

[Voxel]

Hi,
I'm searching for a way of getting/computing the unit value for one pixel.

For example, if I want to draw a line of 1000 'Irrlicht-Units', what is the line length in pixels?
Some pseudo code:

Code: Select all

int nLineWithInPixel = 1000/OnePixelUnit();
if (nLineWidth < 4)
{
    // do something
}

I think it depends on the current zoom factor but I have no clue at the moment...

Is such a function already available or can anybody advise me how to compute this?

Thanks in advance!
Voxel

[Radikalizm]

This completely depends on the distance of the camera from the object you're calculating the pixel-length of, the camera's FOV, aspect ratio, and a lot of other factors, so it's not all too easy to calculate

Why do you need this, and isn't there another easier way to accomplish what you want to do?

[stefbuet]

Maybe you could use the CollisionManager::getScreenCoordinatesFrom3DPosition to do that. (you want to know how many pixels are between two 3D positions?)