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dhara77

dhara77

Technical User
May 23, 2002
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how do u create a circle without using ellipse function.i want a radius to that circle.
 
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make one quadrant...

for (theta = 0; theta <= PI/2; theta+= delta)
{
x = radius * Cos(theta);
y = radius * Sin(theta); [ or y = sqrt(rr - x * x) ]
... the other quadrants are -x,y x,-y -x,-y
}
abing734@yahoo.com
 
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Or make half a quadrant and mirror across the line x=y
ie. xmirror = y ymirror = x
So only 1/8 of the points on a circle need trig/floating point calculation, the other 7/8 are reflections.
abing734@yahoo.com
 
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