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add faye's displayLastEditedBy script

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howard-stearns 2017-02-13 11:42:33 -08:00
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script-archive/displayLastEditedBy.js Normal file
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//
// displayLastEditedBy.js
//
// Created by Si Fi Faye Li on 2 December, 2016
//
// Draws a line from each entity to the user in the current session who last changed a property, if any, as recorded
// by the lastEditedBy property.
(function () {
var SHOW_LAST_EDITED_BY_ME = true;
var SEARCH_RADIUS = 40;
// in meter, if the entities is too far away(out of search radius), we won't display its last edited by
var LINE_COLOR = { red: 0, green: 255, blue: 255};
var LINE_EXPRIRATION_TIME = 3000; // in ms
var UPDATE_INTERVAL = 1 / 60; // 60fps
var myHashMap = {}; // stores {entityID of target entity : overlayID of the line}
var timer = 0;
var lastUpdateTime = 0;
function update(deltaTime) {
timer += deltaTime;
if (timer - lastUpdateTime > UPDATE_INTERVAL) {
var targetEntityIDs = Entities.findEntities(MyAvatar.position,SEARCH_RADIUS);
targetEntityIDs.forEach(function(targetEntityID){
var targetEntityProps = Entities.getEntityProperties(targetEntityID);
// don't draw lines for entities that were last edited long time ago
if (targetEntityProps.hasOwnProperty("lastEdited")) {
var currentTime = new Date().getTime();
// lastEdited is in usec while JS date object returns msec
var timeDiff = currentTime - targetEntityProps.lastEdited/1000;
if (timeDiff > LINE_EXPRIRATION_TIME) {
if (myHashMap.hasOwnProperty(targetEntityID)) {
var overlayID = myHashMap[targetEntityID];
Overlays.deleteOverlay(overlayID);
}
return;
}
}
var targetAvatarUUID = targetEntityProps.lastEditedBy;
// don't draw lines for entities last edited by myself
// you may set SHOW_LAST_EDITED_BY_ME to true if you want to see these lines
if (targetAvatarUUID === MyAvatar.sessionUUID && !SHOW_LAST_EDITED_BY_ME) {
if (myHashMap.hasOwnProperty(targetEntityID)) {
var overlayID = myHashMap[targetEntityID];
Overlays.deleteOverlay(overlayID);
}
return;
}
// don't draw lines for entities with no last edited by
if (targetAvatarUUID === "{00000000-0000-0000-0000-000000000000}") {
if (myHashMap.hasOwnProperty(targetEntityID)) {
var overlayID = myHashMap[targetEntityID];
Overlays.deleteOverlay(overlayID);
}
return;
}
var targetAvatar = AvatarList.getAvatar(targetAvatarUUID);
// skip adding overlay if the avatar can't be found
if (targetAvatar === null) {
// delete overlay if the avatar was found before but no long here
if (myHashMap.hasOwnProperty(targetEntityID)) {
var overlayID = myHashMap[targetEntityID];
Overlays.deleteOverlay(overlayID);
}
return;
}
var props = {
start: targetEntityProps.position,
end: targetAvatar.position,
color: LINE_COLOR,
alpha: 1,
ignoreRayIntersection: true,
visible: true,
solid: true,
drawInFront: true
};
if (myHashMap.hasOwnProperty(targetEntityID)) {
var overlayID = myHashMap[targetEntityID];
Overlays.editOverlay(overlayID, props);
} else {
var newOverlayID = Overlays.addOverlay("line3d", props);
myHashMap[targetEntityID] = newOverlayID;
}
});
// remove lines for entities no longer within search radius
for (var key in myHashMap) {
if (myHashMap.hasOwnProperty(key)) {
if (targetEntityIDs.indexOf(key) === -1) {
var overlayID = myHashMap[key];
Overlays.deleteOverlay(overlayID);
delete myHashMap[key];
}
}
}
lastUpdateTime = timer;
}
}
Script.update.connect(update);
function cleanup() {
for (var key in myHashMap) {
if (myHashMap.hasOwnProperty(key)) {
var overlayID = myHashMap[key];
Overlays.deleteOverlay(overlayID);
}
}
}
Script.scriptEnding.connect(cleanup);
})();