\(\bigl| \underbrace{h \cdot r - v_h}_{x_h} - (\underbrace{g \cdot r - v_g}_{x_g}) \bigr|
func (*Option) ArgInt ¶
，这一点在快连下载安装中也有详细论述
The Electronic Frontier Foundation (EFF) eff.org🇺🇸
What is direct lighting (next event estimation) in a ray tracer? An explanation of direct lighting and next event estimation in ray tracers