1. Re: bullet code (was ICONS - dead horse)
Here are the correct equations:
X = X0 + VX * T
Y=Y0 +VY * T - .5G * T * T
VX = V* COS(ANGLE)
VY = V * SIN( ANGLE)
V = initial velocity at some angle above the ground
X0 AND Y0 are initial positions and could be zero
..george
-----Original Message-----
From: David Roach <roachd_76 at YAHOO.COM>
To: EUPHORIA at LISTSERV.MUOHIO.EDU <EUPHORIA at LISTSERV.MUOHIO.EDU>
Date: Monday, February 07, 2000 4:31 AM
Subject: Re: bullet code (was ICONS - dead horse)
>I have found some errors in your equations. If you are going to tell
>me that my code looks like chicken scratch at least have your information
>correct. I was just looking to see if I maybe overlooked something. I am
>new to programing. I have only done one program in euphoria. Maybe two in
>qbasic. You seem like a very lighthearted person so don't
>take this the wrong way.
>
>you wrote:
>y=vy*t - .5*g*t*t
>
>In dealing with a "projectile" that is launched horizontaly(I'll get into
>angles later) there are
>two simple equation for x and y axis. They are,
>
>x axis:
>x = v * t
>
>y axis:
>y = .5 * g * t^2
>
>This is all you need. Where your equation above for 10m/s at 1 sec tells
>us that the object fell 5.1 meters the one I use (that I got out of a
>physics)
>book marks the object at 4.9 meters. I believe what you have there is
>the vertical *component* of an objet launched at an angle which is
>y = vy * t + .5 * g * t^2.
>If I have inserted foot in mouth please let me know. But I believe this is
>correct. Oh also go back and take a look at your first equation and
>my equation the only diffs are that I take into acount that I don't start
>on 0,0 coords but 50,300 coords other than that they are almost identical.
>You have reproduced my chicken scratch.
>
>Any one feel free to jump in please. Gee I didn't know my foot stank that
>bad.
>
>
>
>roachd_76
