Ellipse Created with ECMA

[wildspidee]

Andrew,

I would like to draw an ellipse based on diameter with code. I located the REllipse in the documentation.

Code: Select all

REllipse::REllipse	(	const RVector & 	center,
const RVector & 	majorPoint,
double 	ratio,
double 	startParam,
double 	endParam,
bool 	reversed 
)	

I don't know what these parameters are in reference to. The only one I understand is Center. As I did with the Fit to Points Spline, perhaps I can create an empty REllipse and then call some other function of yours to create one using X, Y, Angle and Center based on diameter?

Could you explain these parameters to me so that I can set them properly?

Thank you,
Lori

[andrew]

center is the center point of the ellipse.
majorPoint is an end point of the major axis (the longer of the two ellipse axis), relative to the ellipse center.
ratio is the ratio between minor and major axis (second to first axis), e.g. 0.5 for a minor axis that is half as long as the major axis or 1.0 for a circle.
startParam defines the start angle (not strictly an angle for an ellipse, hence called parameter).
endParam defines the end angle.
reversed true for cw, false for ccw.

[wildspidee]

Thank you Andrew.