将线段两端点的分区编码逐位取逻辑“与”,若结果为零(非零),则该线段相对于剪裁窗口必为完全不可见。()
According to the paragraph 3. California has cut the warming effect from diesel emissions
A. using particulate filters on cars and trucks and switching to low-sulfur diesel
B. turning to efficient biomass cook stoves instead of using traditional mud stoves
C. replacing kerosene lamps in villages with solar lamps
D. deploying modern brick kilns
Cutting emissions of which one of the following pollutants dose not belong to the short-term strategy to deal with global warming?
A. black carbon
B. carbon dioxide
C. methane and lower-level ozone
D. HFCs
在z 缓冲器阴影算法中,第一次消隐后,阴影缓冲器保存的是距光源最近的物体表面上点的深度值。()