Just keep part of inside the camera area ,and remove part of outside the camera area.

Similar with Project SOP node.

Co-worker shared this cunning trick with me recently;

uvtexture sop, project uv's from camera.

You can then use a wrangle to remove points that aren't within the 0-1 uv range, eg:


float u = @uv;
float v = @uv;

if (u<0 || u>1) {
removepoint(0, @ptnum);
}

if (v<0 || v>1) {
removepoint(0, @ptnum);
}

Great tip!

-b

thank you ,mestela.
I find this tool,https://www.orbolt.com/asset/vosiloB_::Clip_Camera?show_login [orbolt.com]
this is what I need.