On 13 September 2010 11:55, Spiderdab <77...@tiscali.it> wrote: >> I was about to start on a spreadsheet to generate ballistic >> trajectories as G-code, then remembered that I am at work and paid to >> do other stuff. When do you need this project working? >> > you're a gentleman.. maybe i just need a little example to start, than > i can improve that so i'm not going to take away time from your work. > (but tell me truth, which is more interesting? :-)
Note that the ball stops instantaneously at the end of each arc, when it hits the player, and before setting off in a new direction. So, the path can be derived by pasting together a sequence of simple ballistic arcs. This does mean that each "hit" of the ball will appear to be equally hard (and will be governed by the global accelleration values). This spreadsheet just calculates a ballistic trajectory between points in X,Y,Z space. You need to enter starting X,Y,Z and finish X,Y. You will have to fiddle the initial elevation angle and velocity to hit your final Z position as this is a discrete step algorithm rather than an analytical solution. (Sorry). Air resistance is modelled as linear with velocity. This is probably not true. If you want to use a more complex term then it is easy enough to change the equations. https://spreadsheets.google.com/ccc?key=0AhjJW1-T6n7CdDRTdWRvdnByRHEyTW1vZ2VYbWxDSVE&hl=en&authkey=CMP5ouIK -- atp ------------------------------------------------------------------------------ Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing http://p.sf.net/sfu/novell-sfdev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
