Is my master's degree in sunshine analysis big? I want to know how to meet the sunshine for 2 or 3 hours, that is, to meet the spacing.

That's not easy. First, according to the dimension of sunshine, determine the sunshine angle of spring, summer, autumn and winter and the early, middle and late angles of a day.

Then according to this real-time angle, the light is the hypotenuse, the building height is the right-angled side of the Z axis, and the floor distance is another right-angled side.

Sunshine hours can often be obtained by calculating the hypotenuse and right angle side daily according to the sunshine season.