koobas.hobune.stream
How to get Joint connectedBody OnJointBreak
I have multiple joints connected to a group of objects. If a joint breaks I want the original object and the connected object to respond. The method OnJointBreak doesn't give me any indication of the Joint connectedBody. How can I find the body that was connected?
Why the heck would they only give break Force!? Please help.
I created a work around that is not what i want, but until someone can suggest something better this is what i did.
created an array of connections
//joints
public ArrayList<Part> connections;
then as i create joints i add them to both parts, the original and the connectedBody.
parts[i, j].connections.Add(parts[i + 1, j]);
parts[i + 1, j].connections.Add(parts[i, j]);
then when a joint breaks i flip a flag and wait:
void OnJointBreak(float breakForce) {
JointBroken = true;
}
in the next update (when the joint has been destroyed) I the go looking for the missing joint:
if (JointBroken) {
Ship.EvaluateJointBreak(this);
JointBroken = false;
}
then i can find and act on missing joint
public static void EvaluateJointBreak(Part part) {
foreach (Part sp in part.connections) {
if (sp == null)
continue;
Joint j = findJoint(part,sp);
if (j == null) {
//missing joint
}
}
}
public static Joint findJoint(Part part1, Part part2) {
foreach (Joint j in part1.GetComponents<Joint>()) {
Part temp = j.connectedBody.GetComponent<Part>();
if (temp == part2) {
return j;
}
}
foreach (Joint j in part2.GetComponents<Joint>()) {
Part temp = j.connectedBody.GetComponent<Part>();
if (temp == part1) {
return j;
}
}
return null;
}
There you go.
I recently ran into this issue, but found a better solution, likely because of Unity updates. In Unity 2018 you can now check joint.currentForce. Not sure when that was added
private void OnJointBreak(float breakForce) {
for ( int i = 0; i < joints.Count; i++ ) {//have list of joints
ConfigurableJoint joint = joints[i];
if (breakForce != joint.currentForce.magnitude ) {
continue;
}
RemoveJoint(joint); //do joint cleanup
break;
}
}
It is not a good idea to check inequality between two floats using the != operator. Floats may have precision errors. You should use $$anonymous$$athf.Approximately
