Determining speed in X/Y
Author
I have an asteroids style game in the making and i'm wondering if there is a better way to go about some things:
x_new_speed -= float(cos(self.facing * NEW_PI) * (self.is_accel * self.accel_rate * time_multiplier))
y_new_speed += float(sin(self.facing * NEW_PI) * (self.is_accel * self.accel_rate * time_multiplier))
This accelerates the ship according to the direction its facing. To determine the ships present speed I add x_new_speed and y_new_speed then divide by two but that doesnt sound right to me. If I'm traveling along x at 100 and y by 1 my math gives me roughly 50 but it's obviously moving faster then that. What is a better way to go about determining speed?
Thx in advance.
-Ahl
In other words (if I understand correctly), you take the average of the x- and y- components to get the speed of the object?
I believe that speed is rather:
This is essentially the Pythagorean Theroem - the two components can be seen as the two perpendicular sides of a right-angled triangle, with the speed being given by the length of the hypotenuse.
(This is also a matter of vector mathematics; if you haven't yet encountered that, then I suggest that you look into it - it can be quite useful for these things, I find.)
I believe that speed is rather:
square_root(x_component2 + y_component2).This is essentially the Pythagorean Theroem - the two components can be seen as the two perpendicular sides of a right-angled triangle, with the speed being given by the length of the hypotenuse.
(This is also a matter of vector mathematics; if you haven't yet encountered that, then I suggest that you look into it - it can be quite useful for these things, I find.)
Author
Now that I see it that makes total sense. I don't know why I didn't think of that.
Thank you.
Thank you.
This topic is closed to new replies.
Advertisement
Popular Topics
Advertisement
