mbostock
commented
7 years ago As documented in the README, the polar coordinate system used by d3-shape puts θ = 0 at 12 o’clock (x = 0, y = -r) and positive values proceed clockwise.
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When
d3.radialLineord3.arcis called, I have 2 problemsCan I set the starting line in the polar coordinate（like the X Axis） to horizon right direction ? The default is located in vertical up direction, or I should have rotated it manually?
Can I make it draw in counterclockwise direction just like it behaves in Math? For example, the dot (Math.PI/2, 100) in Polar Coordinate should equal to (0,100) in XY Cartesian Coordinates , but it is draw in (0, -100)