b2Body 与 CCSprite 大小不一样？

Question

我注意到在我的游戏中，我的 b2Bodies 的大小与 CCSprite 的大小不同。 这是我正在使用的代码：

- (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);
}

我将如何编辑该代码以忽略 CTM (PTM) 比率并使其大小与 CCSprite 完全相同？我知道我应该使用 PTM 比率，但就我而言，这并不重要。

谢谢！

编辑1：

- (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);
}

编辑2：

- (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

我想到两件事：

1. 您正在视网膜屏幕上测试它，而没有设置精灵和形状的缩放因子。

2. 尝试使用boundingBox属性而不是contentSize。

在第一种情况下：

使用 - (CC_CONTENT_SCALE_FACTOR() * PTM_RATIO);