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Originally posted by Joss Weatherby I have the trajectory calculations down pat, but they are too slow, taking many thousands of iterations to get the correct angles. I just need to know what kind of interpolation needs to be done on sampled trajectory data to get more accurate results than I am getting now. I am getting results that are sometimes 4-5 milliradians in elevation off, which on a low angle trajectory can result in rounds landing almost 150 meters off target.

what root finding method are you using to solve the equations?

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Originally posted by pkcRAISTLIN I have 3 hobbies: gaming, DJing & correcting maladjusted fools on the internet.

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Originally posted by pkcRAISTLIN Yeah, I’d like to know what horrible, scarring incident in your childhood turned you into such an ignorant, intellectual-hating philistine?

maybe you can use a higher order interpolation. You can look up an algorithm for some polynomial, like quadratic / cubic or spline interpolation. Or, if you have access to matlab, you can easily generate a polynomial function for your data...if you have the entire data set before hand that is. If not matlab, maybe excel can do it. You will have to check.

Why don't you draw the expected curve and show us what exactly is the issue ? Maybe you can also supply the table of data points that you are using.

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Originally posted by twilightki : It feels like something you'd listen to at 4 in the morning, or listen to in your car while you're going in a tunnel.

Basically just split off the amount of pure vertical component of the projectile, see how long it takes gravity to decelerate that to 0, then how long it takes for that to fall from the height it reaches.

Then you have the time, just calculate how far horizontally it would travel in that time (also include any air resistance deceleration).

If it is taking too long, don't actually calculate it, just use look-up tables (if it doesn't have to be uber accurate, and you have plenty space).

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If you can read this, I'm seriously fucking bored.