Box2D coordinate system and Box2D vectors

Task Function
Convert location from World to Pixels Vec2 coordWorldToPixels(Vec2 world)
Convert location from World to Pixels Vec2 coordWorldToPixels(float worldX, float worldY)
Convert location from Pixels to World Vec2 coordPixelsToWorld(Vec2 screen)
Convert location from Pixels to World Vec2 coordPixelsToWorld(float pixelX, float pixelY)
Scale a dimension (such as height, width, or radius) from Pixels to World float scalarPixelsToWorld(float val)
Scale a dimension from World to Pixels float scalarWorldToPixels(float val)