Elanso

Periapse Linden: Ok, so our special guest today is Qarl.
Periapse Linden: The Linden who brought you sculpties
Periapse Linden: He's back with a great new idea he'd like to get feedback on.

Qarl Linden: so i have to give credit where it's due -
Qarl Linden: Seifert originally asked for this feature a year ago.
Qarl Linden: i got sidetracked and didn't get to it 'til now.
Qarl Linden: https://wiki.secondlife.com/wiki/LSL_Touch_Position

Seifert Surface: i think people have been asking for it from waaay back in the day

Qarl Linden: yeah, true.

Vincent Nacon: yeah I've been wondering how that will work

Qarl Linden: what we've got here is the ability to get more information about touch events.

Vincent Nacon: by polygon?

Qarl Linden: you get to know where on the surface, and where in world the touch occurs.
Qarl Linden: you get the face number as well.

Vincent Nacon: err... how many faces are there?

Qarl Linden: it's continually updated as the mouse is held down - so you can implement dragging.
Qarl Linden: 6 faces on a cube - etc.

Seifert Surface: vincent: faces as in faces on a prim

Chance Abattoir: Where on the surface, that's rad!

Seifert Surface: 1 face on a default torus

Qarl Linden: and the POSITION, as well.

Vincent Nacon: oh was thinking about sculpty part

Mbrb Rau: If our AV was a prim it's probably a sculptie.

Qarl Linden: texture coordinates, etc.

Mbrb Rau: and uses llTakeControls

Qarl Linden: right now we're asking for feedback - make sure we don't miss anything important.

Seifert Surface: presumably if we ever get 2 sided planar sculpties, theyd have 2 faces

Qarl Linden: presumably. :P

Seifert Surface: :P

Vincent Nacon: wait... didn't we already have something like that
Vincent Nacon: the drag I think

Qarl Linden: there's a similar call: llDetectedGrab().

Vincent Nacon: yeah

Qarl Linden: but it's not so good for a variety of reasons...

Vincent Nacon: yeah, tried to make a joystick imput by using that
Vincent Nacon: input*

Qarl Linden: it reports movement relative to the camera position...

Vincent Nacon: yeah

Qarl Linden: not so useful.

Vincent Nacon: it was neat at first but meh

Qarl Linden: now you'll be able to put an entire GUI into a texture, and determine with the position info which button was clicked.
Qarl Linden: chess boards, for instance - won't need 64 prims.

Seifert Surface: the continual updating works with the touch event firing lots right?

Siann Beck: That's awesome. A lot of vendors can be re-designed.

Qarl Linden: exactly.

Vincent Nacon: so... if we're going to have touch_position on surface, what does it means for html-on-prim?

Seifert Surface: right

Mbrb Rau: 1 prim vendors...

Qarl Linden: yes - that's one of the motivations for this work -
Qarl Linden: so that prim web browsing will be easier for us to implement.

Vincent Nacon: yeah, figured
Vincent Nacon: well that's good, hope it won't be much of a problem with flash

Rex Cronon: could it be possible for a script to load a notecard that has html code on a specific face?

Qarl Linden: flash is hard because mozilla has a truly horrible plugin interface.

Vincent Nacon: now that's a thought

Qarl Linden: we're looking at webkit and others for that...
Qarl Linden: maybe notecard->html ... but that's not REALLY useful...

Vincent Nacon: so how the position will work? gobally or local?

Seifert Surface: rex: really you want to be able to alter the webpage on the fly from a script

Qarl Linden: only if you can't get your own webpage.

Seifert Surface: say for a scoreboard or something

Qarl Linden: yes. exactly.
Qarl Linden: but you can do a LOT by passing parameters to a webpage in the URL.

Rex Cronon: i want to have display that is not connect to a web page

Vincent Nacon: and for non-flat surface... how will that set the local position? based on UV map maybe?

Seifert Surface: html file in a string?

Qarl Linden: i've seen an example where HTML is in the parameter...
Qarl Linden: yes - it's the UV map.

Vincent Nacon: ah ok perfect

Chance Abattoir: When will this script go into testing?
Chance Abattoir: function

Qarl Linden: soon - i've got the implementation finished - just a couple more tweaks.
Qarl Linden: a month timeframe, i think.
Qarl Linden: but no promises.

Vincent Nacon: oh about the touch position.... how will you set the unit

Qarl Linden: for llDetectedTouchPos() - the units are region coordinates.
Qarl Linden: for llDetectedTouchUV() - the units are 0 to 1, in UV space.

Vincent Nacon: yeah... for UV one I mean

Qarl Linden: we're also adding a function to return the TEXTURE coordinates...
Qarl Linden: its units will depend on how many repeats are in the texture.

Seifert Surface: i was just reading that bit on the wiki qarl
Seifert Surface: seems useful.

Qarl Linden: yeah - there's been a bit of discussion about it.

Seifert Surface: err, jira i mean

Qarl Linden: clicking on a moving monkey.
Qarl Linden: again - it's a case where it could be implemented by a resident-written function...
Qarl Linden: but it's so useful, we kinda have to put it in.

Seifert Surface: interactions with texture animation?

Qarl Linden: Seifert - yes - that's an important factor. the new call will properly get the texture coordinate from an animating texture.

Seifert Surface: whats the precision like on the returned data from the new functions? presumably its at pixel size?

Qarl Linden: it will be pixel level, yes.
Qarl Linden: we're using a raycast to compute the values.

Seifert Surface: so zoom in closer and you get better numbers

Qarl Linden: yes, because the mouse position is quantized...

Seifert Surface: good thing uv coords are floats

Periapse Linden: We aren't adding functions yet that are Mono only

Simil Miles: Except the touch thing ?

Qarl Linden: no no - the touch stuff is in old LSL.