guyfire 寫:若要向某方向發射指定范圍的 particles 呢？
Maybe I was not clear in my last post. 方向發射 (shooting direction) has nothing to do with which type of emitter you use. It can set at the "Direction X/Y/Z" fields. The default is 0 for both "direction X and Z" and 1 for "direction Y", meaning AFTER the particles born from the emitter, they will shot at the positive Y direction at full speed.
If you want to know more about how different types of emitter behave, try create a simple particle emitter and change the emitter type from one to another. Play with the "Direction X/Y/Z" and "Spread" fields with you're using "Directional" emitter.
guyfire 寫:“上小下大”的意思是火焰愈上愈小、愈中間愈多火焰，形成上角下圓的形狀 (水滴型，像前數則中 tutorial 的形狀，但要用 Maya 的 Create Fire) 。
I have answered this one in my last post.... "For width or 上小下大, adjust the "Flame Start/End Radius"."
