Ordinary squares and rectangles are easy to decide. But in practice, most houses are not standardized, either long here or convex there. Here are some typical house drawings for your reference.
A: The center point of the diagonal intersection of a square.
C: the intersection of the center lines of two angles of a triangle.
D: L-shape divides L into two parts, that is, two rectangles. Find the center points of two rectangles respectively, and then connect the two center points to find the final center point according to their respective proportions.
E: It is complicated to find the center of a complex building, but the basic principle is as follows: A. First, divide it into several large squares or triangles, find their center points respectively, and then calculate the total center point according to the method of finding the L-shaped center point.
F: slightly concave and convex. In practice, many houses or buildings are basically square, but there are slight bumps, such as balconies or a small aisle, or there are slight protrusions or depressions. In this case, these slightly concave and convex places can be ignored.
G: There are some vague points in the actual fixed point: the non-enclosed balcony can be excluded from the drawing, and the enclosed balcony must be included.
The large balcony with duplex structure exposed outside should also be counted.
Those who enter the house through the long corridor are not included in the corridor.
Here, I also teach you a simple method, which is actually a way to test whether your center point is correct: cut out a scale diagram of a building or house with cardboard, and then hang it with a line through the center point you seek. At this time, if the scale model has no tilt balance, the center point is correct, otherwise it will be recalculated until it is balanced. In fact, as long as you review junior high school geometry well, it is not difficult to learn to seek the center. This is not difficult. Generally, there are drawings in Feng Shui books, so you can go and have a look. Actually, just use a ruler and compasses. A palace is 45 degrees.
After these works are done, we can judge and adjust this picture in combination with the surrounding environment and indoor layout.