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arcs and animation

1 reply on 1 page. Most recent reply: Jun 22, 2002 11:59 AM by Matt Gerrans

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Chant

Posts: 5
Nickname: meridian
Registered: Jun, 2002

arcs and animation Posted: Jun 21, 2002 10:56 PM
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sry for all the questions. one more though. is it possible to draw an arc on an applet, and then have an object follow that arc by its x, y coordinates? basically, i'd like to drop a ball down the web page, and have it fall in a realistic curve, and thought that having it follow an arc would be the best solution, if possible.


Matt Gerrans

Posts: 1153
Nickname: matt
Registered: Feb, 2002

Re: arcs and animation Posted: Jun 22, 2002 11:59 AM
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Of course that is possible, but I think it would be just as easy and even more realistic to give the ball some initial x and y velocity and calculate the effect of gravity on it as it falls.
Assuming no air, in the vertical, 
v = v0 + at
(where a is 32 feet (or 9.8 meters) per second squared) and in the horizonal the speed remains constant. So at each interval, you calculate the new position (based on the current position and velocities) and update the velocity.

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