I think the NGUI is using raycast and collider to sensor the interaction.
If playmaker can get the Raycast Info of that interaction, it will be great.
For my case, I want to get the hit point position of my UI to get the touch point to perform some Effect and Feature. (start a wave or add a mark on the map something)
I try to read the "NGUI event to FSM proxy" it doesn't pass down the info about the raycast. And I couldn't read deeper there.
Now I'm trying to build the Raycast thing in a Normal Playmaker Way, Dealling with the Not Main Camera Things.