b2Body與CCSprite的大小不一樣嗎？

Question

我注意到在我的遊戲中我的b2Body與我的CCSprite不一樣大小。 這是我使用的代碼：

- (void)addBoxBodyForSprite:(CCSprite *)sprite { 
    b2BodyDef spriteBodyDef; 
    spriteBodyDef.type = b2_dynamicBody; 
    spriteBodyDef.position.Set(sprite.position.x/CTM_RATIO, sprite.position.y/CTM_RATIO); 
    spriteBodyDef.userData = sprite; 
    b2Body *spriteBody = world->CreateBody(&spriteBodyDef); 
    b2PolygonShape spriteShape; 
    spriteShape.SetAsBox(sprite.contentSize.width/CTM_RATIO/2, sprite.contentSize.height/CTM_RATIO/2); 
    b2FixtureDef spriteShapeDef; 
    spriteShapeDef.shape = &spriteShape; 
    spriteBody->CreateFixture(&spriteShapeDef); 
} 

如何將我編輯的代碼只是忽略了CTM（PTM）比一起，僅僅是確切大小爲CCSprite？我知道我應該使用PTM比率，但在我的情況下，這並不重要。

謝謝！

EDIT1：

- (void)addBoxBodyForSprite:(CCSprite *)sprite { 
    b2BodyDef spriteBodyDef; 
    spriteBodyDef.type = b2_dynamicBody; 
    spriteBodyDef.position.Set(sprite.position.x/(CC_CONTENT_SCALE_FACTOR() * CTM_RATIO), sprite.position.y/(CC_CONTENT_SCALE_FACTOR() * PTM_RATIO)); 
    spriteBodyDef.userData = sprite; 
    b2Body *spriteBody = world->CreateBody(&spriteBodyDef); 
    b2PolygonShape spriteShape; 
    spriteShape.SetAsBox(sprite.boundingBox.size.width/(CC_CONTENT_SCALE_FACTOR() * PTM_RATIO)/2, sprite.boundingBox.size.height/(CC_CONTENT_SCALE_FACTOR() * PTM_RATIO)/2); 
    b2FixtureDef spriteShapeDef; 
    spriteShapeDef.shape = &spriteShape; 
    spriteBody->CreateFixture(&spriteShapeDef); 
} 

EDIT2：

- (void)addBoxBodyForSprite:(CCSprite *)sprite { 
    b2BodyDef spriteBodyDef; 
    spriteBodyDef.type = b2_dynamicBody; 
    spriteBodyDef.position.Set(sprite.position.x/CTM_RATIO, sprite.position.y/CTM_RATIO); 
    spriteBodyDef.userData = sprite; 
    b2Body *spriteBody = world->CreateBody(&spriteBodyDef); 
    b2PolygonShape spriteShape; 
    spriteShape.SetAsBox(sprite.boundingBox.size.width/CTM_RATIO, sprite.boundingBox.size.height/CTM_RATIO); 
    b2FixtureDef spriteShapeDef; 
    spriteShapeDef.shape = &spriteShape; 
    spriteBody->CreateFixture(&spriteShapeDef); 
} 

Answer 1

有兩件事情來我的心是：

1. 你的視網膜屏幕上測試它沒有設定標定事實或爲你的精靈和形狀。

2. 嘗試使用boundingBox屬性而不是contentSize。

在第一種情況

：

使用 - (CC_CONTENT_SCALE_FACTOR() * PTM_RATIO);