Digital-Evolutions

Revolve Practice

What is a Lathe?

PLay at 2X speed

Create 3 Revolved surfaces:

Cubic Revolved Surface
Linear Revolved Surface
combined Linear and Cubic Surface

Revolved Cubic Curve

Cubic Curve

Revolved Linear Curve

Linear Curve

Revolved Combined Curves

Combined Curves

Create a Simple Cubic Revolved Polygon Surface.

Using the EP Curve Tool □, create a simple curve. In the option menu, select 3 Cubic.

Make sure you snap the first curve point to the Y-Axis by holding down the {X} on the keyboard. Holding down the {X} on the keyboard toggles the snap to grid feature.

Cubic Curve

Make sure the starting point and the ending point is somewhere on the Y-Axis. If it is not it will either have a hole at the top or the shape will be overlapping.

If the curve crosses the Y-Axis your shape will overlap. *You do not want to cross the Y-Axis at any point.

If the curve does not reach the Y-Axis your shape will have a hole..

Now revolve the curve. Surfaces > Revolve □.

*Make sure you choose the option box at the end.

Notice the Axis Preset we are revolving around the Y-Axis.

Change Segments from 8 to 24. This creates more sections and a smoother shape.

Output Geometry: Switch to Polygons.

Tessellation Method: Switch to Control Points.

Now select Revolve.

It should look something like this.

Hit {3} on the keyboard to active Smooth Preview.

If you shape is black, you need to reverse the curve direction.

Select the curve. *If you cannot select the curve, just delete the shape and revolve it again later.

Select the curve and then Curves > Reverse Direction

Take a screenshot of both the curve and the revolved shape and post it on you website.

Cubic Curve

Revolved Cubic Curve

Create a Simple Linear Revolved Polygon Surface.

Using the EP Curve Tool □, create a simple angular curve. In the option menu, this time select 1 Linear.

*Holding down the {Shift} key while clicking will draw lines at 90 degree angles.

Make sure you snap the first curve point to the Y-Axis by holding down the {X} on the keyboard. Holding down the {X} on the keyboard toggles the snap to grid feature.

{x} Snaps to Grid

{v} Snaps to Vertex

{c} Snaps to Curve

{shift} locks to 45 or 90 degrees.

Something Like this . . .

Notice the way the light hits the shape and gets black in some areas. A polygon's normals are how light reacts at the edges and vertices.

By choosing Soften and Harden Edges, will fix it for the revolved shape. Mesh Display > Soften /Harden Edges.

It should now look like this . . .

Create a Combined Linear & Cubic Revolved Polygon Surface.

This time we are going create 4 curves and align them using snap to curve - 2 angular (linear) and the other 2 curvy (cubic)

Using the EP Curve Tool □, create a simple curve. In the option menu, select 3 Cubic.

Make sure you snap the first curve point to the Y-Axis by holding down the {X} on the keyboard. Holding down the {X} on the keyboard toggles the snap to grid feature.

Use the EP Curve Tool □, create a simple linear curve. In the option menu, select 1 Cubic.

Make sure you snap the first curve point to the last point on the previous curve by holding down the {C} on the keyboard, and while holding down the left mouse button, and then slide down the curve. Holding down the {C} on the keyboard toggles the snap to curve feature.

Something like this.

Using the EP Curve Tool □, create another simple curve. In the option menu, select 3 Cubic.

Make sure you snap the first curve point to the Y-Axis by holding down the {X} on the keyboard. Holding down the {X} on the keyboard toggles the snap to grid feature.

Something like this.

Use the EP Curve Tool □, create the last linear curve to create the base. In the option menu, select 1 Cubic.

Make sure you snap the last two curve points to the X-Axis by holding down the {X} on the keyboard. Holding down the {X} on the keyboard toggles the snap to grid feature.

Now we are going to attach the curve to make one big curve.

Attach Curves: Select all the curves in order from top to bottom; make sure you hold {shift} to select multiple curves at one time.

Then choose Curves > Attach. Change the following Settings:

Blend
Insert Knot
Uncheck Keep Original

It should now look like this.

BUT, if you try to move it, something weird happens. The history is effecting the curves in a strange way. Undo or {CTRL} + {Z} - only once.

With the new curve still selected delete the history. This will break the input connections cause this weird effect.

Edit > Delete By Type > History

Now if you move it, the shape will not change. BUT, it left a few extra curves; select them and press {Delete).

Now using the snap to grid feature, line it back to the Y-Axis. Select the curve, hold down the {X} on the keyboard and move it only in the X-Axis until it is lined up with the Y-Axis again.

Now revolve the curve. Surfaces > Revolve □.

*Make sure you choose the option box at the end.

Notice the Axis Preset we are revolving around the Y-Axis.

Change Segments from 8 to 24. This creates more sections and a smoother shape.

Output Geometry: Switch to Polygons.

Tessellation Method: Switch to Control Points.

Now select Revolve.

It should look something like this.

Hit {3} on the keyboard to active Smooth Preview.

Now post both the curve and revolved shape for all three.

Revolved Cubic Curve

Cubic Curve

Revolved Linear Curve

Linear Curve

Revolved Combined Curves

Combined Curves

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