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spiral curve

puppet

Moderator
what do u need it for?

u could just use a helical sweep. but do a search for equations which can drive ur geometry in this forum.
 

jeff4136

New member
Datum curve from equation, cylindrical coordinates

r = IR + t * (OR - IR)
theta = t * 360 * #T
z = 0

Where:
IR = Inner Radius
OR = Outer Radius
#T = Number of Rotations
 

becer

New member
If you don't want to use equations ...


Create a helical sweep using a surface. Change selection to geometry. Select curve ... Edit>Copy ... Edit>Paste ... While holding CTRL select the rest of the curve (make sure curve type is set to exact) ... OK ... then hide the surface.


View attachment 665
 

mmead0ws

New member
Helical Swept curve or spiral curve?


Here are the equations for a spiral curve in cartesian coordinates:


x=x_offset+(t*angle/360)*pitch*cos(t*ANGLE)+x_radius*cos(t*\
ANGLE)
y=y_offset+(t*angle/360)*pitch*sin(t*ANGLE)+y_radius*sin(t*\
ANGLE)
z=0


The image below shows the parameters (all preceded by "LAY_"), their limits, and how they apply to the model.


View attachment 669


Good luck,


Matt
 

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