我在建立LED面光源特性設(shè)置時(shí)遇到幾個(gè)名詞，請(qǐng)問(wèn)大家是什么意思？ BSDF BRDF BTDF，我該怎么處理這些數(shù)值呢？

怎么還是沒(méi)有人幫忙解答呢？希望大家多提寶貴意見(jiàn)...謝謝了...

咦,不是有一節(jié)就是專門說(shuō)這個(gè)事的嗎? _+0c<'  
我也是剛學(xué),不過(guò),先看了下,應(yīng)該還好明白的吧, RAxp2uif  
哦,不過(guò),我也沒(méi)有細(xì)看的, U\"FYTC  
只是看了下BSDF的定義拉, R\u5!M$::  
說(shuō)的不對(duì),請(qǐng)多多見(jiàn)涼啊

如下是幫助里提供的定義 %^;rYn3  
BRDF：Bi-directional Reflectance Distribution Function. It is the scattered radiance from a surface (reflective scattering) per unit incident Irradiance, and thus has units of inverse steradians (1/sr). The BRDF is defined as the differential scattered radiance per unit incident Irradiance. .DhB4v&  
BSDF：Bi-directional Scattering Distribution Function and is a generic term which is used to refer to BRDF and BTDF. ,Q+.kAh !G  
BTDF：Bi-directional Transmittance Distribution Function. It is the scattered radiance through a surface per unit incident Irradiance. 9u_D@A"aC`  
{"*gX&;~  
具體參數(shù)怎么選取需要自己去多嘗試，手冊(cè)里雖然有公式，但很抽象。

謝謝roadwu和shirley996，還不是很清楚，設(shè)置了幾個(gè)沒(méi)什么變化么？里面說(shuō)到在TRACEPRO里面能量必須守恒，吸收，散射，透射，反射總和系數(shù)等于1？？？可以傳點(diǎn)圖片上來(lái)么，真的非常感謝了

仔細(xì)看看英文說(shuō)明書吧，收獲不小的。