按比例缩放灭点三角形或反转重合视点的量点法作图

Measurement Points Methods of Zooming Vanishing Point Triangle Based on Proportion or Reversing Coincidence View Point

量点法作建筑透视图的原理较复杂,而且在手工绘制量点法两点透视图时,经常遇到图幅过大造成灭点与视点落在图板之外(即不可达)而难以操作的情况。提出一种简便易行、有效利用有限图纸空间的方法:按比例缩放灭点三角形或反转重合视点的作图方法。此方法关键点是节省竖向图纸空间,使图纸得到有效利用并不至于使透视图过小。并以基本立体和建筑实例对该方法进行了应用和验证。结果显示,方法行之有效,值得推广应用。

The basic principles of measuring point method are more complex, and when drawing two-point perspective manually, the problem always occurred that vision point and vanishing points are out of the drawing board. A method is introduced with direct building facade method and assistant vanishing point. In order to effectively use drawing space, vanishing point triangles zoom according to the proportion or coincidence view point reverse. The advantage of the methods is to save vertical drawing space and perspective drawing is not too small. The practice have done to basic building. The methods are effective.