2009/12/3 Bill Coderre b...@mac.com
Now we have laptops and GUIs, and Alan and conspirators have been inventing
new programming systems with Squeak (a newer version of Smalltalk) as their
assembly language core. Etoys is one of them, and if you haven't tried it,
you should.[1]
[1]
By the way:
Pixels are integers, so don't make operations with them, make a variables
like:
varX = 0.0
varY = 0.0
And make operations using them or you will lost the decimals (because x and
y in the image are integers: pixels). This is visible when you do a
bouncing animation, the animation
On Nov 30, 2009, at 11:13 AM, Ian Mallett wrote:
g = -9.8m*s^-2.
If you want to learn about gravity, watch this video:
http://video.google.com/videoplay?docid=-9055536763288165825 -- but be careful
or you might get inspired.
I say that because this video is an instance of The Canonical Alan
This site has some samples about gravity.
http://www.geometrian.com/Tutorials.php
cheers.
On Wed, Dec 2, 2009 at 10:09 PM, Bill Coderre b...@mac.com wrote:
On Nov 30, 2009, at 11:13 AM, Ian Mallett wrote:
g = -9.8m*s^-2.
If you want to learn about gravity, watch this video:
Thanks guys, your replies were helpful. The physics links in
particular were very good for refreshing my memory on the equations.
On 11/30/09, R. Alan Monroe amon...@columbus.rr.com wrote:
I've been trying to get a sprite (the ball) to fall from the top of
the screen with realistic gravity. I
I've been trying to get a sprite (the ball) to fall from the top of
the screen with realistic gravity. I did attempt it, however it's not
so great so I won't post it here.
I wasn't quite sure how to do it, I had it dropping per frame instead
of per second, which meant it went about 60x too fast.
On Mon, Nov 30, 2009 at 11:37 AM, Rob rob...@gmail.com wrote:
I've been trying to get a sprite (the ball) to fall from the top of
the screen with realistic gravity. I did attempt it, however it's not
so great so I won't post it here.
I wasn't quite sure how to do it, I had it dropping per
I have been reading the tutorials but never thought to look at other
people's projects, I will check it out. Thanks.
On 11/30/09, René Dudfield ren...@gmail.com wrote:
On Mon, Nov 30, 2009 at 11:37 AM, Rob rob...@gmail.com wrote:
I've been trying to get a sprite (the ball) to fall from the top
On Mon, Nov 30, 2009 at 3:20 AM, René Dudfield ren...@gmail.com wrote:
On Mon, Nov 30, 2009 at 11:37 AM, Rob rob...@gmail.com wrote:
I've been trying to get a sprite (the ball) to fall from the top of
the screen with realistic gravity. I did attempt it, however it's not
so great so I won't
g = -9.8m*s^-2. Near the surface of Earth, this is usually thought of as a
constant. To make your object fall slower, simply decrease the magnitude of
this constant. Unless doing something that absolutely must be physically
based (like for measuring something), I'd use what looks right.
I've been trying to get a sprite (the ball) to fall from the top of
the screen with realistic gravity. I did attempt it, however it's not
so great so I won't post it here.
These might help:
http://hyperphysics.phy-astr.gsu.edu/hbase/traj.html
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