Box2D：如何获取传感器的位置？
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编辑我在这里更新了此问题：Box2D：如何获取静态物体的位置？
我在Box2D项目中使用传感器。与传感器发生碰撞时，我想知道传感器在世界上的位置。我正在检测与接触式侦听器的碰撞，但是传感器的位置始终为0 0。
从我的代码中：（编辑，添加了整个类）
public class MyContactListener extends b2ContactListener {
public var onSensorEvent:Function;
override public function BeginContact(contact:b2Contact):void {
if(contact.GetFixtureA().IsSensor()) {
var ud1:GameEntity = contact.GetFixtureA().GetBody().GetUserData();
Util.traceVec(contact.GetFixtureA().GetBody().GetTransform().position);
Util.traceVec(contact.GetFixtureB().GetBody().GetTransform().position);
Util.traceVec(contact.GetFixtureA().GetBody().GetPosition());
Util.traceVec(contact.GetFixtureB().GetBody().GetPosition());
onSensorEvent(ud1);
}
if(contact.GetFixtureB().IsSensor()) {
var ud2:GameEntity = contact.GetFixtureB().GetBody().GetUserData();
Util.traceVec(contact.GetFixtureA().GetBody().GetTransform().position);
Util.traceVec(contact.GetFixtureB().GetBody().GetTransform().position);
Util.traceVec(contact.GetFixtureA().GetBody().GetPosition());
Util.traceVec(contact.GetFixtureB().GetBody().GetPosition());
onSensorEvent(ud2);
}
}
}
private function createWorldBody(x_origin:Number, y_origin:Number, box_width:Number, box_height:Number, angle:Number,
density:Number, friction:Number, bounce:Number, entity:GameEntity):b2Body {
trace(\"creating body: x=\" + x_origin + \" y=\"+ y_origin + \" w=\" + box_width + \" h=\" + box_height);
var body:b2BodyDef= new b2BodyDef();
if(entity.type == GameEntity.TYPE_PLAYER) body.type = b2Body.b2_dynamicBody;
// shape
var box:b2PolygonShape = new b2PolygonShape();
if(entity.type == GameEntity.TYPE_PLAYER) {
box.SetAsOrientedBox(box_width/2/pixelsPerMeter, box_height/2/pixelsPerMeter, new b2Vec2(0,0), angle);
} else {
box.SetAsOrientedBox(box_width/2/pixelsPerMeter, box_height/2/pixelsPerMeter, new b2Vec2(x_origin/pixelsPerMeter,y_origin/pixelsPerMeter), angle);
}
// fixture
var fixture:b2FixtureDef = new b2FixtureDef();
fixture.shape = box;
fixture.density = density;
fixture.friction = friction;
fixture.restitution = bounce;
if(entity.type == GameEntity.TYPE_ANIMATION_TRIGGER) {
fixture.isSensor = true;
}
// world body
var worldBody:b2Body = world.CreateBody(body);
worldBody.CreateFixture(fixture);
if(entity.type == GameEntity.TYPE_PLAYER) {
worldBody.SetPosition(new b2Vec2(0, 6));
worldBody.SetAngularDamping(playerAngDamping);
} else {
worldBody.SetAngularDamping(0.1);
}
Util.traceVec(worldBody.GetPosition());
worldBody.SetUserData(entity);
return worldBody;
}
creating body: x=10768.85 y=129.1 w=242.1 h=508.2 angle=0
0 0
creating body: x=13314.9 y=-176.35 w=176.05 h=39.4 angle=0
0 0
creating body: x=14324.4 y=304.3 w=116.05 h=207.6 angle=0
0 0
creating body: x=12819.449999999999 y=336.5 w=905.3 h=156.2 angle=0
0 0
20.84107631571526 6.26063858024741
0 0
20.84107631571526 6.26063858024741
0 0
34.444376903802855 4.2002747636658855
0 0
34.444376903802855 4.2002747636658855
0 0
没有找到相关结果
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您可以张贴更多与车身和固定装置相关的代码吗？关于为什么您当前的代码无法按预期工作的原因可能存在一些线索。