HELP~ Collision problem

[Naohito]

Hi:

I am very new to houdini particles, there is a basic question

about collision. I want to have few particles stick to a sphere source and

make them collide with a grid. After collision, each collided particle became

another source and start to spread particles.

The problem is, I used collision DOP to make particles stick to the sphere.

Then I use another collison DOP to detect hit information with grid. But I found that

even particles hit the grid, the second collison didnt work at all and I

can[t get any hit information from that.

Is there any good ways to obtain hit information and use that as conditions

for another particle? I guess the reason is that the first colission DOP make

all collision information freezedm but I cant find another way to make

particles stick to a moving pbject

Attached file shows how I test this

Edited October 28, 2009 by Naohito

[eyevex]

Hi:

I am very new to houdini particles, there is a basic question

about collision. I want to have few particles stick to a sphere source and

make them collide with a grid. After collision, each collided particle became

another source and start to spread particles.

The problem is, I used collision DOP to make particles stick to the sphere.

Then I use another collison DOP to detect hit information with grid. But I found that

even particles hit the grid, the second collison didnt work at all and I

can[t get any hit information from that.

Is there any good ways to obtain hit information and use that as conditions

for another particle? I guess the reason is that the first colission DOP make

all collision information freezedm but I cant find another way to make

particles stick to a moving pbject

Attached file shows how I test this