1) spheroid shadow
球体阴影
1.
The character and the position of shadow lines on the spheroid are discussed based on light most in use,and according to the principle of the spheroid shadow formed in two projecting planes,the mathematical models of the spheroid shadow on the projecting planes and general planes are established by the method of coordinate transformation.
在AutoCAD中,利用VLISP语言编程绘图,实现球体阴影参数化自动绘图,提高绘图效率和精确度。
2) shade and shadow of spheric surface
圆球的阴影
3) Shadow volume
阴影体
1.
A rendering method that was based on the stencil shadow volume theory was presented,which allowed high-quality real-time overlay of vector data on virtual landscapes.
提出了一种基于模板阴影体原理的3维矢量数据绘制算法,实现了矢量数据在虚拟地形场景中的实时高质量叠加绘制。
2.
This method combines the strengths of shadow maps and shadow volumes.
该算法将阴影图和阴影体算法相结合,先通过阴影图绘制出阴影的轮廓,再利用阴影体算法更新轮廓处象素的模板缓冲值。
3.
This article introduced the general theory of stencil test and building shadow volume firstly,then analysis steps and details of implementing real-time shadows used stencil test and shadows volume technique,and developed a demo program used DirectX to test.
首先介绍了阴影体生成和模板测试的基本原理,然后分析了运用模板测试技术和阴影体技术实现实时阴影效果的具体实现步骤和细节,并采用 DirectX 开发了相应的演示程序进行测试。
4) shadow
[英]['ʃædəʊ] [美]['ʃædo]
阴影体
1.
Rendering vector data over 3D terrain based on stencil shadow volume algorithm
基于模板阴影体算法的矢量数据在三维场景中的绘制
2.
In this paper,we analyse the expression mode and character of situation symbol are analyzed,and a new rendering method of complex situation symbol over 3D terrain is preserted based on the stencil shadow volume technique,expecting the objective of hypsography.
通过分析了态势符号的表达方式和特点,提出了一种基于模板阴影体技术的实时绘制复杂态势符号的方法,实现在三维场景中的高质量叠加显示态势符号,达到随地形起伏的目的。
3.
In this paper,we analyzed the representation mode and character of situation symbol,presented a new rendering method of complex situation symbol over 3D terrain based on the stencil shadow volume technique,and realized the objective of displaying according to terrain.
通过分析态势符号的表达方式和特点,提出了一种基于模板阴影体技术的实时绘制复杂态势符号的方法,来实现在3维场景中的高质量叠加显示态势符号,达到随地形起伏的目的。
5) volumetric shadow
体积阴影
6) penumbral volume
半阴影体
补充资料：空心超导球体（hollowsuperconductingsphere）
空心超导球体（hollowsuperconductingsphere）
设内外半径分别为r1和r2(r1≤r≤r2)，壁厚d=r2-r1的第一类超导体的空心球体处于外磁场强度H0中。令ζ=r/δ，Δ=d/δ，δ=δ0/ψ，δ0为大样品弱磁场穿透深度，ψ是有序参量。设H1和M分别是空腔中磁场强度和样品磁矩。按GL理论，徐龙道和Zharkov给出的部分主要结果如下：
`\zeta_1\gt\gt1`和$\Delta\gt\gt1$时，
H1=6H0ζ2ζ1-2e-Δ，
M=-H0r23(1-3δ/r2)/2
所以对厚壁样品，腔内H1≈0，只要H0低于临界磁场，球壳层可视为磁屏蔽物，样品可利用为磁屏蔽体。对$\zeta_1\gt\gt1$和$\Delta\lt\lt1$的情形，则
H1=H0/(1 ζ1Δ/3)，
M=-H0r23[1-1/(1 ζ1Δ/3)]/2
可见，若$\zeta_1\Delta\gt\gt1$，则$H_1\lt\ltH_0$或H1≈0。所以，虽然$d\lt\lt\delta$，但磁场仍被屏蔽而很难透入空腔，称ζ1Δ/3为空心超导球体的屏蔽因子。相反，$\zeta_1\Delta\lt\lt1$，则H1≈H0，球壳层几乎不起屏蔽磁场的作用。对M讲，也可作同样讨论。此外，类似于实心小样品，也可求出各种临界磁场HK1，HK，HK2和临界尺寸等。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条