Question

Currently I create a b2Fixture like this:

b2PolygonShape spriteShape;
    int num = 3;
    b2Vec2 verts[] = {
        b2Vec2(-29.5f / PTM_RATIO, -49.0f / PTM_RATIO),
        b2Vec2(10.0f / PTM_RATIO, -49.0f / PTM_RATIO),
        b2Vec2(34.2f / PTM_RATIO, -9.2f / PTM_RATIO),
    };
    spriteShape.Set(verts, num);
    bodyFixture.shape = &spriteShape;
    bodyCharacter->CreateFixture(&bodyFixture);

The problem is that on a retina display it seems to double in size, is there a reason for this, and if so how do I make it so that it stays the same size so it doesn’t get messed up on any device?

Thanks!

Answer 1

I faced the same issue as of yours. I have multiplied the content Scale Factor with PTM_RATIO.

You can try the code as below and check it out… It worked for me

int num = 3;
b2Vec2 verts[] = {
    b2Vec2(-29.5f / ( PTM_RATIO * CC_CONTENT_SCALE_FACTOR() ), -49.0f / ( PTM_RATIO * CC_CONTENT_SCALE_FACTOR() )),
    b2Vec2(10.0f / ( PTM_RATIO * CC_CONTENT_SCALE_FACTOR() ), -49.0f / ( PTM_RATIO * CC_CONTENT_SCALE_FACTOR() )),
    b2Vec2(34.2f / ( PTM_RATIO * CC_CONTENT_SCALE_FACTOR() ), -9.2f / ( PTM_RATIO * CC_CONTENT_SCALE_FACTOR() )),
};