Arrays b2body和b2fixture合并到阵列中
我可以将b2body或b2fixture添加到NSmutableArray或NSArray中吗?Arrays b2body和b2fixture合并到阵列中,arrays,nsmutablearray,nsarray,box2d,Arrays,Nsmutablearray,Nsarray,Box2d,我可以将b2body或b2fixture添加到NSmutableArray或NSArray中吗? 我一直在寻找一些解决方案,其中一个说应该先将其插入NSValue,然后将值添加到nsmutable数组中。所以我在我的代码中写下: // Create ball body b2BodyDef ballBodyDef; ballBodyDef.type = b2_dynamicBody; ballBodyDef.position.S
我一直在寻找一些解决方案,其中一个说应该先将其插入NSValue,然后将值添加到nsmutable数组中。所以我在我的代码中写下:
// Create ball body
b2BodyDef ballBodyDef;
ballBodyDef.type = b2_dynamicBody;
ballBodyDef.position.Set(0/PTM_RATIO, 300/PTM_RATIO);
ballBodyDef.userData = [ballSpriteArray objectAtIndex:a];
_ballBody = _world->CreateBody(&ballBodyDef);
// Create circle shape on ball
b2CircleShape circle;
circle.m_radius = 30.0/PTM_RATIO;
// Create shape definition and add to body
b2FixtureDef ballShapeDef;
ballShapeDef.shape = &circle;
ballShapeDef.density = 0.5f;
ballShapeDef.friction = 0.5f;
ballShapeDef.restitution = 0.6f;
_ballFixture = _ballBody->CreateFixture(&ballShapeDef);
fixValue = [NSValue valueWithBytes:&_ballFixture objCType:@encode(struct b2Fixture)];
[ballFixtureArray addObject:fixValue];
//memberi impulse awal terhadap bola
b2Vec2 force = b2Vec2(5, 10);
_ballBody->ApplyLinearImpulse(force, ballBodyDef.position);
bodyValue = [NSValue valueWithBytes:&_ballBody objCType:@encode(struct b2Body)];
[ballBodyArray addObject:bodyValue];
要获取nsmutablearray上的每个b2Fixture和b2body,我在CCTouchBeging方法中执行了以下操作:
for(NSValue *val in ballFixtureArray)
{
b2Fixture *ballFix;
[val getValue:&ballFix];
if (ballFix->TestPoint(locationWorld)) {
//if([ballFixtureArray objectAtIndex:0]->TestPoint(locationWorld)){
for (NSValue *bodyVal in ballBodyArray){
b2MouseJointDef md;
md.bodyA = _groundBody;
b2Body *ballBody;
[bodyVal getValue:&ballBody];
md.bodyB = ballBody;
md.target = locationWorld;
md.collideConnected = true;
md.maxForce = 1000.0f * ballBody->GetMass();
_mouseJoint = (b2MouseJoint *)_world->CreateJoint(&md);
ballBody->SetAwake(true);
}
}
}
但它不起作用,另一方面,当我触摸屏幕上的每个位置时,应用程序就会崩溃。有人能帮我吗?。。
thnx之前,每次预付款。
关于我建议您使用std::list或std::vector来存储这些类。但如果确实需要将此类存储在NSArray中,请使用NSObject包装它们:
@interface Wrapper : NSObject
{
b2Body *body;
}
@property (nonatomic, assign) b2Body *body;
@end