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@Daniel said in What tools are efficient for drawing curves In one step？:
Cubic bezier - Has two points, start and end, and four control handles, 2 each. The so called "pen tool".
Not quite.
Not quite - each segment of a true Cubic Bézier has two control points, one for each end - you often see two control points at a handle because there is one for each of the segments connected to it; if the curve is not closed then the end points will only have one each since there is only one segment coming from them.
Curiously, the pen tools in most drawing apps do present a second control handle when manipulating an end point on an open shape, though some of them (such as Affinity Designer) only show it when you are manipulating the one that belongs there. Mathematically that shouldn't be there, which has me wondering what the apps are actually doing when they present one on that end point.
