rCubicTo
Adds cubic from last point towards vector (dx1, dy1), then towards (dx2, dy2), to (dx3, dy3).
Return
this builder for chaining
Parameters
dx1
offset from last point to first cubic control on x-axis
dy1
offset from last point to first cubic control on y-axis
dx2
offset from last point to second cubic control on x-axis
dy2
offset from last point to second cubic control on y-axis
dx3
offset from last point to cubic end on x-axis
dy3
offset from last point to cubic end on y-axis