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Adds check for breaking forces in sprite physics joints

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This commit is contained in:
Viktor Lidholt 2015-10-12 15:55:47 -07:00
parent 909716956e
commit 13ade2c732
1 changed files with 20 additions and 0 deletions
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20
packages/flutter_sprites/lib/physics_joint.dart
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@ -8,6 +8,7 @@ abstract class PhysicsJoint {
final PhysicsBody bodyA; final PhysicsBody bodyA;
final PhysicsBody bodyB; final PhysicsBody bodyB;
final double breakingForce;
bool _active = true; bool _active = true;
box2d.Joint _joint; box2d.Joint _joint;
@ -36,6 +37,25 @@ abstract class PhysicsJoint {
} }
box2d.Joint _createB2Joint(PhysicsNode physicsNode); box2d.Joint _createB2Joint(PhysicsNode physicsNode);
void destroy() {
_detach();
}
void _checkBreakingForce(double dt) {
if (breakingForce == null) return;
if (_joint != null && _active) {
Vector2 reactionForce = new Vector2.zero();
_joint.getReactionForce(1.0 / dt, reactionForce);
if (breakingForce * breakingForce < reactionForce.length2) {
// TODO: Add callback
destroy();
}
}
}
} }
class PhysicsJointRevolute extends PhysicsJoint { class PhysicsJointRevolute extends PhysicsJoint {