Question

I am simply trying to create a b2PolygonShape from a b2Shape but I am having an error that says: Dynamic-cast from 'const b2Shape*' to 'b2PolygonShape*' casts away qualifiers

This is my code:

const b2Shape *s = fix2.shape;
b2PolygonShape *p = dynamic_cast<b2PolygonShape*>(s);

What am I doing wrong?

Answer 1

It is the const qualifier that the compiler complains about. The solution is to
declare p as pointer to const b2PolygonShape:

const b2PolygonShape *p = dynamic_cast<const b2PolygonShape*>(s);