This paper proposes a piecewise geometric approach to parametrize a kind of quartic implicit algebraic surface.
针对一类四次隐式代数曲面，提出一种基于分片的几何参数化方法。
2
It is proved that the intersecting line of the two curved surface is space curve, and the equation is quartic implicit function with one unknown.
论证了两曲面的交线为空间曲线，其方程为一元四次隐函数关系式；
3
The distance from 3-direction quartic box spline surface to the central triangular planar patch of its control net is investigated as well as its bound.