On Dec 4, 2007 12:45 AM, Greg Ewing <[EMAIL PROTECTED]> wrote:
> To do this calculation properly you'd need to use the
> appropriate relativistic formulas. No doubt you could
> get enough kinetic energy if the object was moving at
> a speed close enough to c, but the more likely result
> would be
Ian Mallett wrote:
So, if our object masses 1kg., to move the Earth 1m/s., the object
must move
199,120,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,
On Dec 3, 2007, at 12:30 PM, Ian Mallett wrote:
On 12/3/07, Matt Smith <[EMAIL PROTECTED]> wrote:
if it bounces a couple of times inside one
time-frame) (http://hyperphysics.phy-astr.gsu.edu/hbase/
hframe.html for
a good physics reference, also, choose radians, steer away from
degrees
http
2007/12/3, Ian Mallett <[EMAIL PROTECTED]>:
> Do you mean like making sounds?
> Pygame does that.
nope.
> By talk, do you mean dictate to, or converse? The latter is much more
> difficult, because the communication would be two-way. Maybe you
> could use microphones...
I'm making a piano game.
The solution: :)
see my previous post for some code.
the problem was twofold: check somehow, if the ball moves SOO slightly, it is
to be considered dead.
BUT! there also was a major flaw in the way the ball bounced back up: the speed
was assumed to INCREASE all the way, even AFTER the dir
On Mon, Dec 03, 2007 at 11:52:08AM -0800, Ian Mallett wrote:
> Do you mean like making sounds?
> Pygame does that.
> By talk, do you mean dictate to, or converse? The latter is much more
> difficult, because the communication would be two-way. Maybe you
> could use microphones...
> Ian
Pygame do
At those speeds you need to use relativity to get the right answer
anyway. A 1kg mass needs to be moving at roughly the speed of light to
accelerate the earth to 1m/s.
Ian Mallett wrote:
So, if our object masses 1kg., to move the Earth 1m/s., the object
must move
199,120,000,000,000,000,000,
On Dec 4, 2007 7:02 AM, David Gowers <[EMAIL PROTECTED]> wrote:
> Hi Ian,
>
>
> On Dec 4, 2007 6:18 AM, Ian Mallett <[EMAIL PROTECTED]> wrote:
> > So, if our object masses 1kg., to move the Earth 1m/s., the object
> > must move
> > 199,120,000,000,000,000,000,000,000,000,000,000,000,000,000,000,00
Hi Ian,
On Dec 4, 2007 6:18 AM, Ian Mallett <[EMAIL PROTECTED]> wrote:
> So, if our object masses 1kg., to move the Earth 1m/s., the object
> must move
> 199,120,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000
On 12/3/07, Matt Smith <[EMAIL PROTECTED]> wrote:
> > if it bounces a couple of times inside one
> > time-frame) (http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html for
> > a good physics reference, also, choose radians, steer away from degrees
> > http://en.wikipedia.org/wiki/Sine)
Yep, and if
Boer Kees wrote:
The best I think you can do, is, in pseudo code:
mainloop:
-get the current time in ms
-calculate the new position of the ball
-take speed of ball, take direction of ball, calculate the imaginary
end position of the ball
-keep checking (with calculus), if the line ball-
#ok, I think I have it broken down into pieces now... check out this code:
#
import sys, pygame, mathpygame.init()pixelspercm=10.0gravity=9.80 * 10.0 #
meter per second per second (juiced up a little :) )framerate=50.0 # per
secondlossperbounce=0.33 # lose energy per bounceframestosilence=3
Do you mean like making sounds?
Pygame does that.
By talk, do you mean dictate to, or converse? The latter is much more
difficult, because the communication would be two-way. Maybe you
could use microphones...
Ian
So, if our object masses 1kg., to move the Earth 1m/s., the object
must move
199,120,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,0
Lenard Lindstrom wrote:
This is less than the Planck length of 1.6 * 10 ** -35 meters so
becomes moot. The Planck length would make a natural cutoff for any
game physics. :-)
I've thought of writing a game with physics operating at the quantum
scale, but I couldn't think of anything inter
Ian Mallett wrote:
If the ground were mobile, that gravity force down would cause the
earth to move down with that same force. Since the earth can't move,
it pushes back with the force of gravity.
But the Earth does move. If you drop a 1kg. ball from a height of one
meter, then both obj
On 12/2/07, Patrick Mullen <[EMAIL PROTECTED]> wrote:
> But there IS an upward force, at least as far as my memory of the
> physics I learned. The whole every action has a reaction business.
Right. Newton's third law. Pushing on a table should move it, if the
force is unbalanced, but it doesn't,
ok, I had this problem once, a while ago, simulating bouncing rigid balls. lost
the code...
The best I think you can do, is, in pseudo code:
mainloop:
-get the current time in ms
-calculate the new position of the ball
-take speed of ball, take direction of ball, calculate the imaginary e
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