Original Post
i'll start with the source. be careful not to fall out of your chair when you start laughing.. ooookay. quite plainly, i suck at math and found this 2d implementation that has some problems. first of all, in its simplicity, it doesn't even do what i want, which is to behave like a sidewinder missile eradically painting the sky with plumes of smoke using its proportional navigation before finally plowing into its target. instead, it "attempts" to curve around and eventually hit the target, as opposed to going in a straight, boring line. however, it even fails at this in some ways. when it reaches the target, the x and z values go up and down causing a "ghosting" type effect where there are seemingly two instances of the missile co-existing a short distance from one another. finally, the last problems is that i don't know how to solve for y. anyone care to help or better yet provide some sample code on how to create a more accurate sidewinder effect? :)
class Missile {
public:
float x,x2,y,y2,z,z2;
float curAngle, destAngle;
Missile(){
x=0;
y=0;
z=0;
curAngle = 0.0f;
}
void Init(float x1, float y1, float z1, float angle){
x=x1;
y=y1;
z=z1;
curAngle = angle;
}
void Update(float x2, float y2, float z2, float speed){
float destAngle = atan2((z2-z),(x2-x));
if(curAngle>destAngle+PI) curAngle -= 1.0f * PI;
if(curAngle<destAngle-PI) curAngle += 1.0f * PI;
curAngle += (destAngle - curAngle) * .1f;
x += cosf(curAngle) * speed;
y = 0; //???
z += sinf(curAngle) * speed;
}
};
