中国图学投影理论及其研究

图学论证了在二维平面上绘制三维空间几何形状的图形的方法，是研究投影法绘制工程图样和解决空间几何问题、理论及方法的技术基础学科。中国是一个具有丰富图学传统的国家。中国图学的投影理论及其研究在先秦之前已有见端倪，魏晋时期已提出焦点透视的图学理论，宋元之际，图样绘制之精，投影画法的创新，使图学理论大具。中国图学的投影理论不仅为中国古代科技的发展提供了信息支撑，也为近代中国图学迅速走向近现代奠定了理论基础。

Projection Theory and Research of Ancient Chinese Graphics

Demonstrating the approach to protract the figure of three-dimensional graphswith geometrical forms in two-dimensional planes, graphics is a basic technical discipline ofexamining protracting engineering drawings using the method of projection and addressing issueson space geometry as well as its theory and approach. Graphics is also a kind of semiotic systemof writing. China boasts of rich tradition of graphics with amazing architectural drawings inPre-Qin period, booming theories of graphics in Wei and Jin dynasties, refined protracteddrawings in Song and Yuan dynasties, and graphics being regarded as important instruments inMing and Qing dynasties when thorough apprehension were pursued in order to seek the practiceof administration. It not only forms the basis for modern and contemporary graphics in China, butalso shapes the future development of graphics. The projection theory of Chinese graphics notonly provides information support for technical development, but also lays out theoreticalfoundation of rapid modernization of Chinese graphics.