Abstract: Based on the quick point positioning of grid and color rendering method， a vector field visualization texture mapping algorithm was proposed. The repeat calculation of the streamline tracking was reduced and the speed was greatly improved， which made the realtime large data be effectively utilized and the various needs in the engineering be satisfied. The effect was particularly obvious in the 3D visualization process. Not only the structure and trends of the vector field could be displayed， but also the vector field size could be indicated by the color graphic. Meanwhile the force aspects could be highlighted more flexible through selfcontrolling the proportion. In addition， the practicality of the algorithm was proved by presentation of turbine disc′s temperature gradient field and connecting rod's displacement field.

Key words: vector field visualization, line integral convolution, mesh, point positioning, color rending