Geometric basis:a geometric solving cell for geometric computing

Geometric computing is an important tool in design and manufacturing and in arts.Conventionally,geometric computing is taken by algebraic computing.The vivid intuition of objects in visualization is lost in numeric functions,which is however very useful to human cognition as well as emotion.In this paper,we proposed a concept and theory of geometric basis(GB) as the solving cell for geometric computing.Each GB represents a basic geometric operation.GB works as both expressing and solving cell just like the concept of basis in linear algebra by which every element of the vector space can be expressed.For 3D problems,with a procedure of a projections reduction,the problem can be reduced to plane and the reduction function can be designed as a GB.A sequence of GB can construct a higher layer GB.Then,by the traversal of tree,a sequence of GB is got and this sequence is just the construction process and also the solution of this geometric problem.