Scratch
archived forums
#1 2007-11-12 15:40:42
- kevin_karplus
- Scratcher
- Registered: 2007-04-27
- Posts: 1000+
pinball game
My son and I have used the features of Scratch v1.2 to make a decent pinball game.
http://scratch.mit.edu/projects/kevin_and_abe/54377
Try it and see how it works for you!
(Note: if you download it, you'll need the scratch v1.2 beta release to make it work.)
Offline
#3 2007-11-12 23:58:13
- kevin_karplus
- Scratcher
- Registered: 2007-04-27
- Posts: 1000+
Re: pinball game
The version 1.2 scratch is in beta release. That means that a buggy version is available for people who want to test it and report bugs. I believe that there is a thread on the forum explaining how to get the beta release. The real release is expected later in November.
Offline
#4 2007-11-13 00:48:19
Re: pinball game
Your math is baffling. Can you please teach me?
I'm probably going to need to use trig for P( )rtal...
eyra
Last edited by AngelEyra (2007-11-13 00:57:14)
Offline
#5 2007-11-14 01:24:02
- kevin_karplus
- Scratcher
- Registered: 2007-04-27
- Posts: 1000+
Re: pinball game
You can find a lot of the math I used in Canthiar's tutorial on ray tracing.
Actually, what I used is somewhat simpler, as there are only two main ideas:
1) moving 1 step in direction D is the same as moving sin(D) in x and cos(D) in y.
2) The dot-product of two vectors (x,y).(a,b) = a*x+b*y is positive if the vectors point in roughly the same direction, 0 if they are at right angles, and negative if they point in roughly opposite directions.
A good pre-calculus book should have most of this stuff.
Offline
#6 2007-11-14 02:21:00
- SimpleScratch
- Scratcher
- Registered: 2007-05-25
- Posts: 100+
Re: pinball game
Hi Kevin
I downloaded the project and for some reason it doesn't seem to work very smoothly - have you used some 10Ghz/quad processor machine to develop it on? :-)
regards
Simon
Offline
#7 2007-11-14 12:16:11
- kevin_karplus
- Scratcher
- Registered: 2007-04-27
- Posts: 1000+
Re: pinball game
No, it was developed on a G5 Mac, far from state of the art (they haven't made them for a couple of years).
It does only run on v1.2 beta, so if you downloaded it, I'd be surprised if it runs at all.
Offline