snickerbockers
commented
4 years ago note to self: the reason why all my attempts at making soft_gfx use fixed-point end in failure is probably because tri_area2 overflows the size of a 16-bit integer.
eg, for a triangle covering half the screen tri_area2 would return 640*480=307200, and most games would have triangles that go beyond the screen's boundaries too.
not sure exactly what's going wrong here, but the texture sampling code in soft_gfx is wrong and tends to sample from texels adjacent to where it should be sampling. This is most apparent in the menus in Daytona USA 2001, which use very low-resolution textures.