topic Re: scaling Curve from Equation in 3D Part & Assembly Design

scaling Curve from Equation

ProFeature — Tue, 30 Jan 2024 13:09:01 GMT

I created a curve from equation.

x = sin(t) + 2 * Sin(2*t)
y = cos(t) - 2 * cos(2*t)
z = -sin(3*t)

I tried Scale Model but it doesn't work on a curve from an equation.

Is it possible to scale the curve without modifying the equations?

Thanks

Re: scaling Curve from Equation

tbraxton — Tue, 30 Jan 2024 13:31:39 GMT

You have the equations defined. Just multiply each equation by a scalar value to "scale" them. If you explain the constraint of not modifying the equations that is probably useful to someone finding a workaround.

To double the size use scalar value of 2

i.e. for the X component: 2*(sin(t) + 2 * Sin(2*t))

Scaler =1

Scaler=2

Re: scaling Curve from Equation

kdirth — Tue, 30 Jan 2024 13:43:07 GMT

Select the curve then Copy Geometry and, under Options, select No Dependency. This creates a copy of the curve that no longer references the original. If you then scale the model, the original will stay the same and the copy will scale.

Re: scaling Curve from Equation

tbraxton — Tue, 30 Jan 2024 14:45:02 GMT

Applying a scalar to the equations (without editing the equation in the curve feature) it is possible to scale the curve size. By using a scaler parameter in the curve definition, the curve size can be scaled by modifying the parameter value. This establishes a single feature that can generate infinite sizes of the curve on demand and is parametric.

Does this approach satisfy the requirement to not change the equations?

The red rectangle is shown for scale reference.

Re: scaling Curve from Equation

ProFeature — Tue, 30 Jan 2024 15:27:33 GMT

Thank you 🏆