Three-dimensional inclined floor clear height analysis method and system

The invention relates to the technical field of floor clear height analysis, in particular to a three-dimensional inclined type floor clear height analysis method and system. The method comprises the following steps: acquiring a floor slab component needing to be analyzed in a BIM model; according to the obtained floor slab components, the upper portions and the lower portions of the floor slab components are disassembled according to component division in the BIM model, and analysis units are obtained after disassembling; in the analysis unit, an accurate intersection of upper and lower floors is obtained through Boolean intersection operation; obtaining the clear height of the upper and lower floors by using the accurate intersection of the upper and lower floors and a point and surface-based ray method; and forming a clear height distribution diagram according to the obtained clear height distance. The method for calculating the clear height when upper and lower floor components are relatively complex is s