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Index › Programming Questions & Help › Programs › whats this equation dng?
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whats this equation dng??? (Read 615 times)
veen
whats this equation dng???
May 5th, 2010, 1:40pm  
i am spinning a teapot
void
motion(int x, int y)
{
spin = (spin + (x - begin)) % 360;
 begin = x;
 glutPostRedisplay();
}
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TfGuy44
Re: whats this equation dng???
Reply #1 - May 5th, 2010, 8:23pm  
Your function is updating the value of a (I assume) variable called "spin"  (which, I hope, is defined elsewhere), and is adding to "spin" the difference of "x" (which is a parameter to the function) minus a (I assume) variable called "begin" (also, hopefully, defined elsewhere), then making sure this new value of "spin" is between 0 and 360 (which leads me to believe that "spin" is actually used in a rotation somewhere). It then updates the value of "begin" to "x", and calls a second function call "glutPostRedisplay()" (which sounds a lot like that function that redraws the screen in C code that does 3D graphics, but isn't used at all in Processing).

You do know that this is a forum for questions about programs written in the Processing language, right? If you need help with a C programming assignment, this is the wrong place to be asking!
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