平方反比距离衰减模型。
这是基于物理的点光源和聚光灯衰减模型。此衰减模型以光源与着色点之间距离平方的反比衰减。这意味着当表面接近光源时,观察到的光线非常明亮,但随着距离的增加快速衰减。
这与不是基于物理的衰减模型有着本质上的不同。当切换到此衰减模型时,强度采用物理单位,通常需要高很多的值才能看出光照效果。1 流明的光源**非常**暗淡。
距离使用 Unity 单位(指标:1 = 1 米)。衰减只在光照范围内定义并且在光照范围处**平滑**衰减到零。严格来说,这并不是基于物理的,但是很有用的优化。为避免数值问题,用于计算的最小距离为 1 厘米。
Did you find this page useful? Please give it a rating:
Thanks for rating this page!
What kind of problem would you like to report?
Thanks for letting us know! This page has been marked for review based on your feedback.
If you have time, you can provide more information to help us fix the problem faster.
Provide more information
You've told us this page needs code samples. If you'd like to help us further, you could provide a code sample, or tell us about what kind of code sample you'd like to see:
You've told us there are code samples on this page which don't work. If you know how to fix it, or have something better we could use instead, please let us know:
You've told us there is information missing from this page. Please tell us more about what's missing:
You've told us there is incorrect information on this page. If you know what we should change to make it correct, please tell us:
You've told us this page has unclear or confusing information. Please tell us more about what you found unclear or confusing, or let us know how we could make it clearer:
You've told us there is a spelling or grammar error on this page. Please tell us what's wrong:
You've told us this page has a problem. Please tell us more about what's wrong:
Thank you for helping to make the Unity documentation better!
Your feedback has been submitted as a ticket for our documentation team to review.
We are not able to reply to every ticket submitted.