Helping my nephew with collision detection

[randysiler at mac.com]

Thanks very much Karl, we're looking at it now.

Byron and Randy
On Sunday, September 1, 2002, at 02:07 PM, Karl Ramberg wrote:

>
>
> randysiler at mac.com wrote:
>>
>> Hi All,
>>         I'm helping my nephew (13) get started writing a game in 
>> Squeak
>> (trying to move him more into the joy of writing games rather than
>> playing games) and he has made some great strides but has a problem he
>> can't get through. I'd like to help him but at this point the extent 
>> of
>> my wisdom is pointing him at Squeak. If any of you could give us a 
>> hint
>> about how to proceed we'd both greatly appreciate it.
>>
>>         Starting from the "make a car" tutorial Byron has now made a 
>> tank and
>> a steering wheel  and some balls that he wants to bounce back and 
>> forth
>> between two walls. He's quite exceited about the cool games he could
>> create trying to drive the tank through a field where these bullets 
>> are
>> bouncing back and forth and he has discovered that he needs collision
>> detection But we haven't been able to implement it yet. Currently he
>> has his balls (bullets) bouncing backand forth from the top and bottom
>> of the Squeak world but we can't get them to bounce off the walls he
>> has made.
>>
>>         I've told him that I think Squeak has collision detection but 
>> it is a
>> little beyond me to actually show him how. It seems like we want to
>> write a test where the ball decides if it is touching a wall. We see
>> "touches" but we can't get it to allow us to say touches the wall.
>>
>>         If any of you can help us we'd appreciate it. Thanks.
>>
>> Randy and Byron.
> Here is snipped from a earlier email:
>
> I made a Space Invader Tutorial for the etoys.
> You will learn how to copy an instance, start it running and then check
> for
> collisions and delete it self. Not very advanced but shows off some of
> etoys possibilities.
>
> http://209.143.91.36/super/503
>
> Also check out bobs super swiki (http://209.143.91.36/super/)  for some
> great and fun projects.
>
> Karl