CPlusPlusProjectTemplate/main.cpp

#define OLC_PGE_APPLICATION
#include "pixelGameEngine.h"

class Object{
    public:
    olc::vd2d pos;
    Object(olc::vd2d pos)
    :pos(pos) {}
    virtual bool collidesWidth(Object&obj);
};

class NPC:public Object{
    olc::vd2d size;
    NPC(olc::vd2d pos,olc::vd2d size)
    :Object(pos),size(size) {}
    bool collidesWidth(Object&obj)override{
        return obj.pos.x>=pos.x&&obj.pos.x<=pos.x+size.x
            && obj.pos.y>=pos.y&&obj.pos.y<=pos.y+size.y;
    }
}

int main() {
    return 0;
}