Peter Sharpe's Digital Images

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Making Chains

Bryce Tutorials

Making a length of chain using a Multi-Replicated Torus is easy - just follow these steps.

Create a Torus.
Click on the E button to Edit it and set the diameter to about 170 or whatever you wish the thickness of your chain to be. Be sure not to move this torus.

Duplicate the first Torus (Ctrl-D) and rotate it 90 degrees around the Y axis.

Select From Front view and raise the second torus until it's at the position shown to the left.
This sets the link spacing and Y offset for Multi-Replicating additional links.

Click on Edit/Multireplicate and enter the number of extra links you wish to create in the Quantity box. Do not change any of the other entries - here the 13.31 is the required Y offset preserved from when you raised the duplicate - the -90 is preserved from when you rotated the duplicate. The minus sign may not be there it depends on the direction in which you rotated the duplicate - it doesn't matter if it's not there.

Click on the check mark amd the Multi-Replication will take place producing the effect on the left.
Select all the Tori and group them together.

Here I've rotated the group 90 degrees around the X axis - lowered it and rotated 30 degrees around the Z axis.
If you apply a texture and render you'll see something like this.

If you squash the Torus along the X axis before duplicating and multi-replicating you will produce an oval shaped link like this.

OK, that's the simplest chain you can make but what about this one.
It's basically the same as the one above but it shows a gap in each link.

To produce this effect you need to create your positive squashed torus as before and subtract a thin disc or cube from one side using a negative boolean operation. The resulting group is then duplicated and rotated through 90 degrees and raised to the required position just as you did with the torus above.However since we are now using a group and not a primitive the offset will not be preserved when we go to Multi-Replicate.

Tocalculate the offset is, however,quite easy. With the top (duplicate) group selected click on the A button to bring up the Object Attributes dialogue box. Write down the number that appears in the Origin Coordinate Y box. Now select the original lower group and do the same. Subtract the second figure from the first and the result is the required Y offset to enter in the Multi-Replicate dialogue box. The 90 degree rotation is preserved.

You can also produce rectangular links in the same way. Above is a group of two of the rounded cubes from the Imported Objects group in the Object Preset Library.Again you will need to calculate the Y offset as described above.

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