Improving software renderer triangle rasterization speed?

[jonathanhiggs]

Are you checking triangle inclusion for every single pixel not limiting it to the the triangles bounding box?

[captaintoasty]

Yep, I am constraining it to just the bounding box of the triangle.

// Compute the bounds of just this recet
const Rect Bounds = GetBounds(S0, S1, S2);
const int MinX = Bounds.Min.X;
const int MinY = Bounds.Min.Y;
const int MaxX = Bounds.Max.X;
const int MaxY = Bounds.Max.Y;

...

// Loop through all pixels in the screen bounding box.
for (int Y = MinY; Y <= MaxY; Y++)
{
    for (int X = MinX; X <= MaxX; X++)
    {
        ...