Question

我在游戏中注意到我的b2Bodies与我的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);
}

如何编辑该代码只是忽略CTM（PTM）比率，并且只是CCSprite的确切大小？我知道我应该使用PTM比率但在我的情况下并不重要。

谢谢！

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

我想到的有两件事情是：

您正在视网膜屏幕上进行测试，而不为精灵和形状设置缩放系数。
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);

b2Body与CCSprite的大小不同？

1 个答案: