Woodworking wine cabinet slant wine compartment how to do?

First draw the square, then split the point then left and right anti-slope line marked out the line of plate thickness. Then remove the center line, this time you will find made out of the figure every two boards diagonal border place have small triangles. In the outer circle to go a circle of 12.5 of the plate half layer of the slope line, according to this slope line extension to form a diagonal after, and then remove the center line of the plate and AB plate butt line. Use CAD to measure the length of the sheet material can be.