A Means of Drawing for Perspective Ellipse and its Applications

Abstract:

There is no fixed form for circles not parallel to drawing, with the lens ellipse, and perspective ellipse changes with the size of circle, distance from the screen angle and the relative location of sites location. It is a hardful thing both for manual and for computer graphics. A mathematical model procedure is developed according to the perspective transformation, as long as inputting size of circle, distance from the drawing (coordinates) to the relative angle, as well as site location (coordinates), other parameters to determine the size, and the direction and position of perspective ellipse is determined.

• Periodical: Advanced Materials Research (Volumes 102-104)
• Pages: 79-82
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.102-104.79
• Online since: March 2010
• Authors: Xi Fa Yu, Su Jun Yi, Yu Zhu, Sheng Yang
• Keywords: Circle, Engineering Graphics, Perspective Ellipse, Perspective Transformation

References

[1] X.F. Yu, X.M. Xu and Y.M. Wang: Journal of Engineering Graphics, Vol. 3 (2005), pp.137-140.

[2] Z.G. Xiang and R. Plastock: Computer Graphics Exercises and answers (Mechanical Industry Press, Beijing 2000).

[3] X.F. Yu, S. Yang and R.C. Ma: Journal of Engineering Graphics (2005), pp.67-71.