Autodesk Alias Tutorial | Water Spray

This highly detailed tutorial describes how to model this water spray.

Step 01

Start by setting the construction options as shown.

Preferences > Construction Options...

Step 02

In the left viweport create a line starting at 0 0 0 and make it 60mm in length.

 

Step 03

Draw some curves for the profile of the main shape of the waterspray.

 

Step 04

Its likely that all the pivot points will be all over the place.

 

Step 05

Select all the curves and delete their history

Delete > Delete Construction History

From the palette select Set Pivot and type 0 to set all the pivots to 0 0 0.

Step 06

With the curves still selected group them. (the pivot point of the group will be set to 0 0 0)

Bring up the revolve dialogue box and make sure the options are set as shown and click on go.

Step 07

Its good practice to constantly review the model so I

apply some shaders to the surfaces to see what Ive got... Render>Multi-Lister>Shaders

Step 08

The zebra stripe analysis tool is used to describe what the rate of surface change. eg a flat plane would show no zebra stripes.

Step 09

As you can see this fille has no lead. ie. the curve used to create the cross section has no rate of change, it is a constant size. This makes the fillet look somewhat unrefined and cheap.

Step 10

The curve set on the left has lead and the set on the right hasnt. The resulting shapes are almost identical but the curvature comb shows that there is a change in curvature from none at the ends and a peak in the middle.

Step 11

Now when I rotate it is very difficult to tell where the fillet is.

Step 12

This is also evident in the zebra analysis mode. The zebra stripes gradually become thinner as opose to a sudden change like before.

Step 13

Once all the curves have been tuned the resulting shapes look much more refined and flow much better.

Step 14

Next draw some curves in y0 as shown.

Step 15

Revolve the curves as before but this time around x.

Step 16

Next Im going to build a fillet between the two intersecting surfaces.

During the building process I will have more and more surfaces on the screen so I often isolate surfaces that I am working with. Select the surfaces to isolate then go to Object Display>Hide Unselected

Step 17

Create the fillet surface (Palette>Surface>Surface) Filletwith the options as shown.

 

Step 18

The result should be as shown.

Step 19

Next Im going to build some grip grooves in the nozzle. Begin by creating a sphere and snapping it to the isoparm as shown.

Step 20

Trim the sphere in half then create a draft surface from the inside edges as shown. Group the two objects.

Step 21

Move the groups pivot point to the centre of the original sphere then rotate the group about the pivot point in z to align it with the boundary of the nozzle.

Step 22

Create curves on surfaces by intersecting the group and the nozzle surfaces. Then trim out the pieces that arent needed.

Step 23

Move the groups pivot point to the centre of the nozzle and duplicate (Edit>Dupliace>Object) them using the settings as shown.

Step 24

Select the new geometry and group it (Edit>Group).

Set the pivot point to the centre of the nozzle and duplicate using the settings shown.

Step 25

Shade up the model.

Step 26

Next Im going to model the handle. In the left viewport create some curves for the outline of the handle.

Step 27

Create a plane in the zx axis as shown.

Step 28

Move the plane 10mm in -y then mirror it through y.

Step 29

Project the curves created earlier in the left viewport (Palette>Surface Edit>Project)

Trim away the outer parts of the planes (Palette>Surface Edit>Trim)

Step 30

Create some skin surfaces between the trimmed adges as shown. (Palette>Surfaces>Skin Surface)

Step 31

Manipulate the cv's on the lower vertical skin surface to give it some crown then create a freeform blend between the two skin surfaces (Palette>Surfaces>Freeform Blend)

Step 32

Create some fillets as shown. (Palette>Surfaces>Surface Fillet)

Step 33

Create some skin surfaces on the outer sides of the handle as shown.

Step 34

Create surface fillets on the outer edges.

Conclusion

Continue using the tools described above to add more detail to the model. Remeber the more detail the more realistic the model will look.

 

If you have any questions feel free to contact me.