Nurbs-based 3d Human Modeling Techniques And Springboard Diving Simulation System

3-dimengsional human modeling and animation is a very important instrument in technology analysis and diagnosis of emulous gymnasium. Therewith, we establish a human body based on B-spline surfaces which is suitable for the simulation system of springboard diving. Withal, on the basis of NURBS FFD (free-form deformation), we discuss a motion modeling to simulate the bend of human joint to realize the animation of human body.First, the human body surface is divided into seven parts, and each part is created by the way of using double cubic B-spline surfaces. To attain G1 continuity on the stitching line of two B-spline surfaces, one order tangent condition is applied to the bound of each B-spline surface. Second, we establish the equation of human body's movement by the utilization of former optimizing results and the method of multiplying of matrix.At last, we design and develop the 3-dimensional simulation system of springboard diving with the tool, OpenGL. The result shows that the model has good vision effect and real-time nature and is very useful to practice.