Constrained for G1 cubic trigonometric spline curve interpolation

This paper presented the G1 cubic trigonometric spline function with three shape parameters that generate a constrained curve interpolates 2D data. The purpose of this research is to ensure generated passes through all data point yet satisfied cases line constraints given. are: must lie above Li below and lastly, between two lines Li,1 Li,2. A simpler theorem implemented involving roles parameters. Two are set free, while another parameter fixed fulfil stated. results show smooth can be produced within by using developed hereditary preserved. Numerical examples illustrated discussed.