Detect If The User Release Keypress In Control

[joniveehernandez]

Hi guys, can you give me an idea on how to detect if the user release keypress in control function? I'm working on something where I want to fire some script code if the user is no longer pressing keys control W, A, S, D or Arrow Up, Left, Down, Right. Thanks :)

[Ron Khondji]

    control(key id, integer level, integer edge)    {        integer start = level & edge;   // key down        integer end = ~level & edge;    // key up        integer held = level & ~edge;   // key held down        integer untouched = ~(level | edge);  // key untouched     }

From the wiki.

 

[joniveehernandez]

Sorry, little confused on this when I released all the keys or not pressing any control keys. Confused on those values LOL

[Qie Niangao]

In the code snippet that Ron posted, the "end" variable will contain a bit vector identifying which key was released in this event, and "held" will be a bit vector of keys still pressed. If held == 0, they've all been released.

[EDIT: Not quite. In theory, a single event could hold both a key being released (end != 0) and another one being pressed (start !=0), in which case held could be 0 but a new key is pressed. Rather, I should have said that all keys being released corresponds to the even simpler condition of level == 0.]

[joniveehernandez]

Cool, just tested it out and it works! (level == 0), I must admit, control function article is a little confusing to me LOL, Thanks guys

[SapphicFancy]

ok, further question on same topic.  I want my script to move a child prim when I Release the left arrow key.  what is the syntax for detecting the Release of the left arrow key?

[Innula Zenovka]

Control events are sometimes hard to keep track of.   I use this template from the old LSL Wiki to help me understand what's going on:

control(key id, integer held, integer change) {
        integer pressed = held & change;
        integer down = held & ~change;
        integer released = ~held & change;
        integer inactive = ~held & ~change;
    }

So if I want to detect when I release the left arrow key, it would be:

control(key id, integer held, integer change) {
        integer pressed = held & change;
        integer down = held & ~change;
        integer released = ~held & change;
        integer inactive = ~held & ~change;

        if (released & CONTROL_ROT_LEFT){
        	llOwnerSay("Released left arrow key.");
        }
    }