Book 1 Chapter 13.2 `dev-major`: `Generating Sample Rays`

[hollasch]

Discussed in #1075

^{Originally posted by LollipopFt September 25, 2022}

raytracing.github.io/books/RayTracingInOneWeekend.html

Line 3214 in dd6660d

return ray(origin, lower_left_corner + s*horizontal + t*vertical - origin);

was changed to this:

raytracing.github.io/books/RayTracingInOneWeekend.html

Lines 3387 to 3390 in dd6660d

	return ray(
	origin + offset,
	lower_left_corner + s*horizontal + t*vertical - origin - offset
	);

this flipped the image on the vertical axis such that it is upside down. changing the code to

            return ray(
                origin + offset,
-                lower_left_corner + s*horizontal + t*vertical - origin - offset
+                lower_left_corner + s*horizontal + (1-t)*vertical - origin - offset
            );

fixed it.
is it just me?

[hollasch]

Fixed in #1144