| OCR Text |
Show 16 circle Rather it expected. as approximate the sphere. depends the on In the present case, the Figure 1.9 represents the line drawing ith 1.8a Figure sphere is shown the line of the on the Figure 1.8b with the displaying information about its reflection of the light source shape· is available to without introducing to cross. the on The same light. oriented at 45 degrees the observer. distortions. This when no for searching based Techniques an the on which lead the observer shading distortions, wrong interpretation of the shape of the modeled object. problem remains to be found, but In to provide the addition of simulated specular shading Gouraud scheme evidenced severely the a displayed complex surface is particularly disconcerting a improved model, the author attempted a sphere to used polygons The shape of the contour changes but it is not right. sight. distortion in reflection the shape of the contour is of the shaped specular cross of shape A to complete solution to possible using the is probably not frame to frame discontinuities piecewise model. , Finally the , of problem film illustrated is computer generated surf ace is approximated with planar the facets which different artificial continously highlights highlights A is cylinder is from one surface the not steady of this approximated light take object brings these from end the to of the frame phenomenon is. other, object. to a thus on a uniform into across creating a their some However, the position. of frame as the cylinder turning with 3 planar polygons (as all motion, facets the light, the intensity of the shade on good example to the direction of the a A curved following situation. the in shade When this surf ace is in the motion of the as toward orientation surfaces varies The perpendicular In the next frame shade. these are facets. in of a prism). object rotates. about its When one axis. edge • |
