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adjust grab script so that avatars can't bootstrap themselves during an object hand-off

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This commit is contained in:
Seth Alves 2016-01-22 16:38:28 -08:00
parent 5d8828e872
commit 41a2173901
1 changed files with 9 additions and 1 deletions
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10
examples/controllers/handControllerGrab.js
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@ -165,6 +165,7 @@ var STATE_EQUIP_SPRING = 16;
// "collidesWith" is specified by comma-separated list of group names
// the possible group names are: static, dynamic, kinematic, myAvatar, otherAvatar
var COLLIDES_WITH_WHILE_GRABBED = "dynamic,otherAvatar";
var COLLIDES_WITH_WHILE_MULTI_GRABBED = "dynamic";
function stateToName(state) {
switch (state) {
@ -1636,6 +1637,13 @@ function MyController(hand) {
"collidesWith": COLLIDES_WITH_WHILE_GRABBED
};
Entities.editEntity(entityID, whileHeldProperties);
} else if (data["refCount"] > 1) {
// if an object is being grabbed by more than one person (or the same person twice, but nevermind), switch
// the collision groups so that it wont collide with "other" avatars. This avoids a situation where two
// people are holding something and one of them will be able (if the other releases at the right time) to
// bootstrap themselves with the held object. This happens because the meaning of "otherAvatar" in
// the collision mask hinges on who the physics simulation owner is.
Entities.editEntity(entityID, {"collidesWith": COLLIDES_WITH_WHILE_MULTI_GRABBED});
}
setEntityCustomData(GRAB_USER_DATA_KEY, entityID, data);
@ -1746,4 +1754,4 @@ function cleanup() {
}
Script.scriptEnding.connect(cleanup);
Script.update.connect(update);
Script.update.connect(update);