Drawing a line code
z
z at z.com
Sun Nov 6 20:07:47 UTC 2022
On Sunday, 6 November 2022 at 16:48:24 UTC, Joel wrote:
>I want my code fixed up so that works from any two points.
You can add a condition to prevent writing out of the
image/framebuffer/whatever memory so it won't do any out of
bounds write.
Another valid algorithm could be testing all pixels for distance
from the line.(i believe that's what 2D vector rendering software
does?)
`incrE` and `incrNE`'s use can be replaced with an approach where
you increment a counter by `dx/dy`(assuming `dy > dx` here) every
iteration(after you draw the dot i believe) and whenever the
counter is above `1` you add `sx` or `sy` to the `x` or `y` value
then substract the counter by `1`.(as the wording implies, you
will probably need to branch depending on if `dx > dy` or `dy >
dx`).
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