屏幕图形的压缩存贮与释放及其在机构动态模拟中的应用

由于常规的动态模拟方法的模拟效果受到图形复杂性的严格限制，通常只用于简单图形的动态模拟．本文介绍的屏幕图形的压缩存贮与释放显示方式与图形的复杂程度无关或关系甚微，对复杂图形也能产生极为逼真的动画效果．文章论述了屏幕图形的压缩存贮与释放的实现原理及对于不同图形适配器如ＣＧＡ、ＥＧＡ／ＶＧＡ的程序设计方法，并用Ｃ语言编制了相应的子程序．通过对增程式游梁抽油机主体机构的动态模拟，介绍了其应用及程序编制的技巧．本方法不仅在机构ＣＡＤ、ＣＡＩ及其他动画技术中能发挥重要作用，而且能在图形系统的开发中得到很好的应用，其程序具有很好的移值性．

Contracting Memory and Release of Screen Graph and Their Application in the Dynamic Simulation of Mechanism

onventional dynamic simulating methods are usually used for simple graphs and their results are affected by the complicacy of graphs.The display mode of the contracting memory and release of screen graphs introduced in the paper has no or little relation to the complicacy of graphs and may produce more lifelike animation.The paper expounds the principle of contracting memory and release of screan graph,method of programming for different graphics adapters, such as CGA,EGA/VGA,etc.Their corresponding subroutines programmed in C were also worked out.Its application and programming techniques are introduced by dynamically simulating the main mechanism of beam pumping unit having increased strokes.This method can not only play an important role in mechanism as CAD,CAI and other animation techniques,but can also be applied in developing graphics system.Besides,the corresponding programs are very easy to transplant.