I draw a curve with a Fixed Spline tool.
clicking the nodes X1, Y2, X3, X4, X5.
I surprised It goes below the horizontal line starting from the node X5.
I expected It make a slight curve between X4 and X5.
Why did It go like that?
Trial May 23rd.sm2d (9.2 KB) TShirt.smis (1.3 KB)
It did this because you clicked on X5 three times.
If you clicked twice on Y1 and then on X5, it would look like this:
If you place a point at the intersection of the lines from X5 & X8, added points in the middle of the lines, then it would look like this:
Trial May 23rd.sm2d (9.8 KB)
Question 1) Can’t I delete the unnecessary node on the Spline Fixed Tool Property Menu?
So I have to redraw the spline with spline fixed tool again. Right?
Question 2) I clicked theere three times because.
When I click two times. The arrow does not appear.
So It is not ready to click the enter and finalize drawing the curve.
??
Question 3) I understand the extra Control Point’s function there to keep the curve above the horizontal line. A15.
It doesn’t look like It use interpolation in algorithm.
Because there is not a single node below that horizontal line chosen with the Fixed Spline Tool.
So to me It must not go below that horizontal line.
Yes
There are ALWAYS 2 control handle points between 2 control points. The start and end points are also control points.
The curve handle will take its distance and angle from the distance and angle between Control point and the Control Handle point.
So whether you have placed the control handle point directly from control point, or used any other point to create it doesn’t matter. What matters is the distance and angle of the control handle point from the control point. This is why I teach people to do them the way I do.
Yes, each section needs to be complete with the 2 control handle points between the 2 control points. The 1st time you clicked made the curve from X4 to assume a direct distance between X4 & X5 at the same angle as if you had drawn a line between the 2. However, since this is the control handle point After the Control Point X4, the angle is at 180° of the Before control point angle, which makes the control handle point to go below the line from X5 to A12.
The 2nd time that you clicked on X5 assumed an angle of 0° and a distance of 0.
You can’t complete a fixed curve/spline until you have clicked on 2 control handle points and an end point. Only after doing this will you be able to complete the curve by hitting Enter
Question 3)
See question 2 where I have explained.
