JM CS2,
Can you try and rephrase... I'm not sure what you mean.. is it 'all
the pixels that a certain line touches'?
If so, you can get the equation for a line by these junior high maths:
y = kx + m
(
You know the start- and end-points of the line, so:
starty = k * startx + m
endy = k * endx + m
thus:
starty - k * startx = m
endy - k * endx = m
and:
starty - k * startx = endy - k * endx
)
so that:
(starty - endy) / (endx + startx) = k
When you have k you get m by inserting it in the original starty = k
* startx + m. Now you have the equation for the line.
Make arepeat loop to insert all x:es from startx to endx to see what
y values you get. Those are the points that the line crosses.
-Andreas
>Dear List
>
>how does one calculate all the points on a straight line vector ?
>
>Thank you and kind regards
>
>JM
>CS2
>
>
>
>
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