Language: C++
struct point{int x; int y;}
class rotator()
{
point center;
point pos;
int xvel; int yvel;
void move()
{
if (pos.x < center.x) {xvel += 1;}
if (pos.x > center.x) {xvel -= 1;}
if (pos.y < center.y) {yvel += 1;}
if (pos.y > center.y) {yvel -= 1;}
pos.x += xvel; pos.y += yvel;
}
}
It's something I just quickly wrote, but isn't this a way you could approximate a circular path without having to worry about sin/cos code?
I used structs and classes for readability sake, but all you need are the six variables: 3 x,y pairs for the position, center, and velocity.
Basically, all it does is orbit the center by accelerating towards it. You could use similar code for a wave by just making the horizontal a constant speed.
I'm just saying for the purposes of NES level programming, it's pretty darn close to a circular path.