Simulation Technology Of Non-realistic Art Style

NPR has absorbed lots of research achievements in realistic rendering. Before that, research of NPR was based on image and most of algorithm was implemented on CPU. Today, the graphics rendering pipeline has been widely used in research and implementation of NPR. For application, NPR technique can cover lots of fields. Especially in game design, it has found more and more extensive applications. How to realize a kind of NPR rending in our engines, is becoming the most important problem of this research.Nowadays in game engines, special effect rending is required to realize by programming solely. The research target of this article is to regard NPR module as a sub-module of special effect rending in our engines and switch in engine main module in plug-in form.The thesis bases on the hardware-accelerate technique,proposes one technique in silhouette detection and rendering based on image space with GPU shader programming, and designs a new illumination model by improving on the Phong illumination model.We use the two techniques in the two artistic rendering realizations of this thesis. The thesis realizes two kind of NPR similar with cartoon and pen-and-ink. The writer researches present realization of multi-rending effects of NPR, borrows the parts with good effect and high efficiency of it to improve the present insufficient parts in rending procedures. For cartoon rendering in this thesis, presents NPR pipelines similar with cartoon pictures by inputting 3-dimension modules, silhouette detecting, outline the profiles and edges of objects in back, illumination model rendering, uniformly color the surface inside the outlines and color uniformly color the surface inside the outlines. For our pen-and-ink rendering in this thesis, studies the automatic generation of pen-and-ink rendering systematically in NPR using strokes with different size and shape, with the method of image-based generation. And combining the pen-and-ink rendering to the multi-layered rendering into which the slicing, MMI(multi mesh imposter), hierarchical image caching and billboard technique are merged. The multi-layered vegetation rendering with the pen-and-ink style is proposed for accelerated drawing of complex environments, ie. forest scene.The presenting procedure does not need the users'intervene. It uses the method based on programmable graphics hardware, utilizes the counting ability of programmable graphics hardware. Since the speed is fast, it could be used in game engines well and provide a brand-new effect to effect module of game engines.