A RESEARCH ON APPLIANCE OF PERSPECTIVE HOMOLOGY IN DESCRIPTIVE GEOMETRY

In this atricle, the author studies the appliance of perspective affine homology in orthographic projection, i.e., how to evaluate the point of intersection of a straight line and a plane surface, the distance between a point and a straight line, the line of intersection of two plane surfaces, and the line of section of a plane surface and the stereoscopic etc, so as to reduce the complexity and error in drawing, increase speed of problem solving and deal with some specific problems perfectly.