# JIAYI ZHAO

ILIAZHAO

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## Recent Forum Posts

#### Question about @TimeInc in Houdini dynamics.June 27, 2022, 1:27 p.m.

@ifree
Thank you for your reply. I confused some concepts before. The initial velocity is constant in every frame or second, unless I want it to affect the position, I need to divide it by 24. I multiplied the initial velocity by @timeinc, which means that I mistakenly took the initial velocity as the initial acceleration, so I thought I would get its value at each frame.

#### Question about @TimeInc in Houdini dynamics.June 27, 2022, 11:59 a.m.

@ifree At the beginning, I wanted to multiply the initial velocity by @TimeInc because I thought the initial velocity was based on seconds rather than frames, so I wanted to change that to frame Initial velocity.

#### Question about @TimeInc in Houdini dynamics.June 27, 2022, 10:44 a.m.

Oh, Sorry. You are right (3, 0, 0) I accidentally typed the wrong number.

And I finally understood my mistake.
The reason why I write (velocity * @TimeInc + force * @TimeInc) is that I regard the force here as a constant velocity rather than an acceleration.
This will cause my solver to produce a uniform motion rather than a quadratic function trajectory. I didn't wrap my mind about this at that time.