(3 ) a fast direct integer algorithm for rasterizing rational 5 spline curve 有理b样条曲线的快速生成算法研究。
The second is to modify how the selected fonts are rasterized 第二件事是选好字型后,针对选上的字型修正其画字方式。
Make a rectangle with the rectangle tool ( any color ) and rasterize it 使用矩形工具画一个长方形,填充任何颜色都可以。
After rasterizing the shape, i lock off the transparency and duplicate the layer 在勾扩完外形后,我给透明层解锁,然后拷贝这个层。
New font information requests are needed . a request to query the metrics for a list of glyphs along with a new font listing function which provides as much information about the font as can be gathered without rasterizing every glyph 设计新的字体信息请求是必要的。一个查询一列字形的请求外加一个字体查询函数,该函数可以在不光栅化字体的每个字形的前提下提供尽可能多的字体信息。
Paper [ 76 ] provides a integer algorithm for rasterizing free curves, we need change the curve form to implicit function form, then use curve's positive-negative property to draw, but we ca n't use this algorithm when curve's degree is higher than 3 and this algorithm ca n't avoid using multiplication; paper [ 77 ] provides a new generating algorithm, this algorithm can draw bezier very well, but for b-spline curve, we need use convert them into bernstein base form . because this process spends a lot of time, this algorithm has not a good speed and effect for rendering rational b-spline curve 现在经常采用的算法也是基于几何的算法(即线式生成算法)和基于像素的算法(点式生成算法);文献78]提供了一种有理参数曲线的快速逐点生成算法,该算法对有理b吮ier曲线的绘制,能起到很好的作用,但是对于有理b样条曲线,必须先通过多项式的代数基与bemstein基间的变换矩阵,把原式用bemstein基表示,这一过程由于计算量大,降低了曲线生成的速度和效率