Application was built under the test project with Schulz-Engineering. Special approach for 3D object decomposition has been developed. Decomposition is starting from the free surface identifying as a first element in the selection and finishing after enumeration of all surfaces. Than object is representing as a set of triangular solvers and future convexisation is caring out by grouping of neighbor solvers into new convex object. Application was built on the base of MS C++ and use standard Open GL library.