Point-based Surface Rendering with Motion Blur

Abstract

In this paper we show how to extend point-based surface rendering to illustrate object motion. We do this by first extruding the circular points into ellipsoids, which fill the space traced out by the points in motion. Using ellipsoids instead of cylinders achieves a low-passing effect of the motion trail. We then find the screen-space projection of each ellipsoid, which is an ellipse. These can be rendered conveniently using hardware acceleration. Our technique thus facilitates the rendering of complex objects with real-time motion blur. It gives the viewer a sharply rendered object together with the hint of the direction of motion. The construction of the motion blur trails can be based on different rendering primitives, as is also discussed in the paper. Various trail textures are presented to achieve artistic rendering results.