manipulating L-system with a spare parameter

[cspears2002]

I'm working through the Houdini L-Systems Volume 1 tutorials from cmivfx. The instructor created a l-system and then a spare parameter that the l-system referenced with a ch() expression in the rules. This allowed him to adjust the length of the l-system on the fly. He would adjust the spare parameter, and the l-system's length would change in real time on the screen. I created a similar system, but I can't adjust the length on the fly. I have to set my generations parameter to 0 and then to new setting before the spare parameter can take affect. What am I doing wrong? Is this caused by a difference between Houdini 8 and Houdini 10?

chris_lesson2_v02.hipnc

[sparkChan]

I'm working through the Houdini L-Systems Volume 1 tutorials from cmivfx. The instructor created a l-system and then a spare parameter that the l-system referenced with a ch() expression in the rules. This allowed him to adjust the length of the l-system on the fly. He would adjust the spare parameter, and the l-system's length would change in real time on the screen. I created a similar system, but I can't adjust the length on the fly. I have to set my generations parameter to 0 and then to new setting before the spare parameter can take affect. What am I doing wrong? Is this caused by a difference between Houdini 8 and Houdini 10?

hi, I have got the same problem when I watched the Houdini L-systems Volume 1. I didn't know why on that time.

today I see your sence, although I don't know why, I solve the problem through creating a variable under values tap and referencing the spare channel.

Note: the vairable name is what you want to name.

Edited December 7, 2009 by sparkChan

[sparkChan]

I'm working through the Houdini L-Systems Volume 1 tutorials from cmivfx. The instructor created a l-system and then a spare parameter that the l-system referenced with a ch() expression in the rules. This allowed him to adjust the length of the l-system on the fly. He would adjust the spare parameter, and the l-system's length would change in real time on the screen. I created a similar system, but I can't adjust the length on the fly. I have to set my generations parameter to 0 and then to new setting before the spare parameter can take affect. What am I doing wrong? Is this caused by a difference between Houdini 8 and Houdini 10?

chris_lesson2_v02_modify.hipnc