How to the insert point

[Arthur~Chiu]

i only want to copy some points and insert points  in a particular position.

how to do this?

 

[kleer001]

There's lots of ways to do that. What are the points for? What's the effect you want?

Simplest way would be an Add SOP and just type in the point positions you want.

Can you provide an example scene with what you've tried before?

[Arthur~Chiu]

I want iterate per curve,primitive and get per curve points,such as one curve has 4 points,

the point index is like this {0 ,1 ,2, 3 }  ,now i want to copy the point index 0  and  3 data(position and attribute) ,

after that i want insert the copied  point 0 beforethe the point index 0 ,now the point index is {0(new copy point),1(The original point 0),2(The original point 1),3(The original point 2),4(The origina point 3l)}

 

It means i want to in pointlist before and after each insert a point,

 

I find  "insertPointCopy ( GA_Offset src,     GA_Index beforeWhich = GA_INVALID_INDEX   )" operation

but when i Insert point index 0 is always at the bottom,

the "GA_Index beforeWhich" parameter should be how to set?

 

Or have a better way?