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Handle removal of sprite physics bodies during the physics simulation

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This commit is contained in:
Viktor Lidholt 2015-10-05 13:47:51 -07:00
parent 071201a5bb
commit ab104c809d
3 changed files with 22 additions and 1 deletions
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1
examples/game/test_physics.dart
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@ -83,6 +83,7 @@ class TestBed extends NodeWithSize {
void myCallback(PhysicsContactType type, PhysicsContact contact) {
print("CONTACT type: $type");
contact.nodeB.removeFromParent();
}
bool handleEvent(SpriteBoxEvent event) {

2
packages/flutter_sprites/lib/physics_body.dart
View File

@ -120,7 +120,7 @@ class PhysicsBody {
void _detach() {
if (_attached) {
_physicsNode.b2World.destroyBody(_body);
_physicsNode._bodiesScheduledForDestruction.add(_body);
_attached = false;
}
}

20
packages/flutter_sprites/lib/physics_node.dart
View File

@ -31,6 +31,8 @@ class PhysicsNode extends Node {
_ContactHandler _contactHandler;
List<box2d.Body> _bodiesScheduledForDestruction = [];
double b2WorldToNodeConversionFactor = 500.0;
Offset get gravity {
@ -57,6 +59,9 @@ class PhysicsNode extends Node {
}
void _stepPhysics(double dt) {
// Remove bodies that were marked for destruction during the update phase
_removeBodiesScheduledForDestruction();
// Calculate a step in the simulation
b2World.stepDt(dt, 10, 10);
@ -71,6 +76,16 @@ class PhysicsNode extends Node {
body._node._setRotationFromPhysics(degrees(b2Body.getAngle()));
}
// Remove bodies that were marked for destruction during the simulation
_removeBodiesScheduledForDestruction();
}
void _removeBodiesScheduledForDestruction() {
for (box2d.Body b2Body in _bodiesScheduledForDestruction) {
b2World.destroyBody(b2Body);
}
_bodiesScheduledForDestruction.clear();
}
void _updatePosition(PhysicsBody body, Point position) {
@ -257,6 +272,11 @@ class _ContactHandler extends box2d.ContactListener {
b2Contact.isTouching(),
b2Contact.isEnabled()
);
if (type == PhysicsContactType.postSolve) {
}
// Make callback
info.callback(type, contact);