math problem - GameCreators Forum

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misifield

17

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Joined: 23rd Nov 2007

Location: ohio

Posted: 11th Feb 2008 10:38

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i think im posting this in the right spot. im having a problem trying to figure out how to find the xz cordinates of a circle on the edge of the cirlce. the circle is a sphere that is scaled down to look like a circle. it is a platform that an object is on and when the object gets to the edge of it the object falls off. does anyone know how i can make this happen? ive been messing with this for 3 days now. included is a paint image i did so you understand what im trying to do.
thanks

mfield

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BatVink

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Joined: 4th Apr 2003

Location: Gods own County, UK

Posted: 11th Feb 2008 14:01

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You need to know when the object is further away from the circle than it's radius. So you need the distance between 2 points, those points being your object and the disc.

+ Code Snippet

FUNCTION distance(obj1,obj2)
   xx#=(object position x(obj2)-object position x(obj1))*(object position x(obj2)-object position x(obj1))
   yy#=(object position y(obj2)-object position y(obj1))*(object position y(obj2)-object position y(obj1))
   zz#=(object position z(obj2)-object position z(obj1))*(object position z(obj2)-object position z(obj1))

   distance=sqrt(xx#+yy#+zz#)
ENDFUNCTION distance

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misifield

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Joined: 23rd Nov 2007

Location: ohio

Posted: 11th Feb 2008 18:12

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thank you. i actual also found another way to do it while i was waiting on this post, if you make another sphere close to the same size i think a little smaller and set collision on so when you touch the sphere it knows your at the edge then run the falling code. but im going to write this code down because im sure it will be very usful in the future thank you.

mfield

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