clamp here could not always give the correct value

[zenodante]

https://github.com/samhocevar/zepto8/blob/0f704a3e9141584aa29b83571c63f4e891352a2d/src/pico8/gfx.cpp#L596

[zenodante]

The slop of the line would be wrong after clamp.

[samhocevar]

That value should not affect the slope of the line, which is always (y1 - y0) / (x1 - x0), but I see how it can offset the whole line. Thanks for pointing this out!