In article <1183323712.231134.54420@[EMAIL PROTECTED]
>,
bob@[EMAIL PROTECTED]
wrote:
> I am working on some software rendering code that does triangle
> rasterization. I am testing by creating a quad comprised of two
> triangles. However, there is a clear seam where the triangles
> meet. The seam is caused by certain pixels not getting filled
> in. Is there a standard way of getting rid of this?
This is almost certainly a rounding/FP problem. The standard ways to
fix it are to (a) adjust your rounding algorithms and/or (b) over-draw
your triangles by a pixel on one or both ends (which is really just
another way of adjusting your rounding.)
Write a program that draws different triangles to see what the actual
effect is. You'll likely notice a pattern, and be able to deduce a fix
from that. It's not uncommon for this to be an off-by-one bug, or for
the solution to be the apparent introduction of one.
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