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我有一个由我使用的Box2D API的回调激活的原型方法。回调可以到达函数,但它不是函数的正确实例。什么是正确的语法来获得回调调用此。原型类。如何发送原型方法作为JavaScript中的回调?
的Box2D的API调用:
Box2d.prototype.getBodyAtMouse = function() {
this.mousePVec = new this.b2Vec2(this.mouseX/this.SCALE, this.mouseY/this.SCALE);
var aabb = new this.b2AABB();
aabb.lowerBound.Set(this.mouseX/this.SCALE - 0.001, this.mouseY/this.SCALE - 0.001);
aabb.upperBound.Set(this.mouseX/this.SCALE + 0.001, this.mouseY/this.SCALE + 0.001);
this.selectedBody = null;
var _this = this;
this.world.QueryAABB(_this.getBodyCB, aabb);
return this.selectedBody;
}
这是被称为Box2D的API方法:
b2World.prototype.QueryAABB = function (callback, aabb) {
var __this = this;
var broadPhase = __this.m_contactManager.m_broadPhase;
function WorldQueryWrapper(proxy) {
return callback(broadPhase.GetUserData(proxy));
};
broadPhase.Query(WorldQueryWrapper, aabb);
}
这是回调我希望API能够正确引用:
Box2d.prototype.getBodyCB = function(fixture)
{
if(fixture.GetBody().GetType() != this.b2Body.b2_staticBody) {
if(fixture.GetShape().TestPoint(fixture.GetBody().GetTransform(), this.mousePVec)) {
selectedBody = fixture.GetBody();
return false;
}
}
return true;
}