The existing functions xarc draw an ellipse, but the semi-major axes are aligned with the plot axes. Is there a way to 'rotate' the ellipse so it has an orientation that is not with the plot axes?
1 Answers
If the arc is the only element drawn in the axes, then you can actually use xarc() to generate it, and then rotate the whole axes:
clf
xarc(0, 1, 3, 1, 0, 310*64)
isoview
gca().rotation_angles(2) = 70;
But, its likely not the case. Then the arc must be generated as a polyline object, and then rotate() can be used to rotate it:
clf
alpha = 0:1:310;
[a, b, xc, yc] = (3, 1, 2, 2);
x = xc + a*cosd(alpha);
y = yc + b*sind(alpha);
r = 20; // rotation angle in °
xyR = rotate([x;y], r/180*%pi, [xc ; yc])';
plot(xyR(:,1), xyR(:,2))
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