What he introduced included oval projection, stereographic projection, analemma and scenography etc.

关于投影几何，他带来的有椭圆投影、球极投影、平行正投影和透视法等。

Stereographic projection is known since the antiquity and was originally known as the planisphere projection.

立体绘图法原称为星座盘投影法。

What are the relations between the earth surface, the geoid, and the Earth spherop?

高斯投影的变形特征是什么？为什么常常被作大比例尺普通地图的地图投影？

Television utilizes the cinematographic projection principle.

电视应了映电影的投影原理。

And it gives the model of investment diversification of venture capitaland uses skiagraphy algorithm to solve it.

建立了风险投资分散模型，并运投影算法对其进行求解。

The unfold blank of the complex shape is researched by the method of emit-projection based on sheet neutrosphere.

在板料的中,射投影法对复杂钣金固定梁的形状进行展开尺寸研究。

Optical projector, tension tester, pressure tester and torsiometer are the testing instru-ments. Testing results can be typed automatically.

检测设备有光学投影仪、拉、压、扭力测试仪，检测结果由测试仪自动打印。

Traditional filtered backprojection(FBP) method required complete projection data,which were often difficult or even impossible to acquire for objective reasons.

传统的滤波反投影算法(FBP)要求完备的投影数据,而实际检测中往往由于客观原因无法获得完全的投影数据。

By the method of electril charge projection the expression of charge density and field intensity on midperpendicular plane on a conductive plate are given.

利电荷投影方法,给出导体薄板电荷密度的表示式和中垂面场强分布。

According to the theory of scalar diffraction, first, the equipollence of spatial distribution of the plane-wave interferential field and parallel projective sine grating is discussed.

摘要根据标量衍射理论，首先讨论了两平面波干涉场的空间分布与平行投影正弦光栅的等价。

An equalarea pseudo cylindrical projection gather is constructed, in which the longitudes are hyperbola being symmetrical to the central meridian and the latitudes are parallel lines.

摘要构建了一个纬线表象为平行于赤道的直线，经线表象为对称于中央直经线的双曲线，且面积没有变形的投影集合，并得到一组概括公式。

Said image pair with parallactic information can also be inputted to the computer by scanning equipment or can be formed by adopting computer three-dimensional animation software.

图对合成片5可以制成透明投影片或幻灯片，作立体图像的投影。

The drawing method for the double channel impeller is studied.It is found that there is an in-conformity between the dimensions of plane-view and pinacoid-view of fluid cross-section.

摘要研究了双流道污水泵叶轮常的图纸表达方法，发现平面图的断面投影结果与轴面图中确定的断面形状尺寸不一致的问题。

As mentioned above in the directional lights section, the rendering of shadows for directional lights is an approximation that allows us to use a single render to cover a largeish area with shadows.

你也可以使着色语言作为技术的实现基础来处理阴影投射体和接收体的材质来实现更复杂的阴影算法，比如实现支持自投影的深度阴影贴图。