From the original SynthMaker forum (2004–2014), with its members’ names and dates.
infuzion ·
Seems the Arc primitive is missing a few degrees; the knob in the attached file is set to start at 180 degrees, & end 180 degrees later, but it actually starts later (about 182) & ends early (176?). I expect the arch to start flat & end flat. Or maybe someone can see something else? This is basically the knob in the SM2.0.4 toolbox.
stw ·
Seems to be some strange interpolating? I remember to have these issues with KnobMaker and eded up adding some extra degrees here and there. Also interesting to see what happens if you change the sensity to e.g. 0.01 to calc smaller graphical steps. This causes some distortion and odd results and is far away from a "straight" arc.
infuzion ·
stw wrote: Seems to be some strange interpolating? I remember to have these issues with KnobMaker and eded up adding some extra degrees here and there.
3 degrees it seems for my knob; yours is 2...
trogluddite ·
Looking at it more closely, it's not quite that simple...
Watch what happens when you use the little knob to alter the sweep thickness (useful to zoom in your screen to see more clearly) - the centre lines are marked for easy reference.
The 'mid-point' of the arc (seen easily when it is very thin) does appear to make the correct sweep angle - but, the thickness of the arc is not drawn along the radius of the curve, and the offset from the radius is mirrored left to right - as if it were drawn using one of those 'calligraphic pen' type line styles in Photoshop where the pen 'nib' rotates. So basically the sweep angle seems correct, but the termination of the line 'end caps' are not drawn correctly.
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