Raup's Coiler allows you to generate invertebrate shell 3D models,
and export them to 3DStudio ( or other 3D software like SketchUP ) where
you can apply textures and render effects, or simply use them on your
scenes. Otherwise, you can also use it to understand how Raup's coiling
model works. So it can be usefull to 3D modellers who need to generate
realistic shell models for their scenes, or to paleontology and biology
students interested on theoretical morphology
(click over the image to enlarge)
|Raup's Coiler snapshot
(click over the image to enlarge)
|Raup's coiling model:
This software is based in Raup's mathematical model, which applies
the exponential coiling equation over a cone: the cone coils itself
around the axis of coiling while it's section increases. It means
that the shell could be understood as the surface that this cone
section generates when it coils arround the axis. This model uses
4 parameters to describe the general form of the shell:
is the shape of cone cross section which progressively enlarges
after each complete whorl about the axis of coiling. So modifying
this parámeter the section of the shell will change. 1
is a circle and other values are ellipses.
is the relative distance between the generating curve and axis of coiling.
the change of cone's movement along axis with respect to W.
- W(Expansion): is
the change of cone's base size, it is a constant factor by which
any lineal dimension of the generating curve is enlarged during
a full revolution about axis of coiling.
The bigger this parameter is, the faster the spirals
S values give diferent generatrix sections
shell whole sections for diferent T values
The program also uses other parameters that are not included in Raup's
model but are usefull when generating the shell. These parameters
are: Revolutions, Resolution and Rings/Revolution.
In scientific studies, this parámeters are obtained measuring real shells,
but if you only want to obtain some realistic models for your scene
you can play with them in the program to see what happens. It is recomended
starting with very small values and increase them slowly until you
reach the model you are looking for.
Generate your own shell model:
After having understood or having a notion about how Raup's coiling
model works you can try to generate your own model. You can follow
these steps to get your shell:
|-First go to File > New and click Yes in Create new model? message box.
|-Then adjust D, W, T and S parameters with their slide bars, or enter the values directly into their text boxes. Then adjust Revolutions, Resolution and Rings/rev
the same way you have done with other parameters. Start giving small
values to the parameters.You can start, for example, with this values: D=0, W=2, T=0, S=1, Revolutions=3 , Resolution=15, Rings/rev=18 .
|-To see the results of selected parameters click over Draw shell
button placed in the bottom right corner of the window. If the results
are not what you were looking for, modify them a little and draw the
shell again to see what happens. Repeat this until you have your
desired shell 3d model.
|Click here to get more examples. They will help you to understand how do this program and Raup's coiling model work.
Minimum system requirements to run this software are:
- Pentium 200Mhz or compatible
- 32 MB RAM
- 3 MB of free hard disk
- Win XP / Win Vista / Win 7
Downloading and using Raup's Coiler means accepting these conditions:
Click here to download Raup's Coiler.
Unzip in a folder the provided .zip file and then execute
RaupsCoiler.exe. In Windows 7 it must be executed as administrator.
This software is freeware and may be distributed without charge and in
its original form. The copyright and any intellectual property relating
to this program remain the property of the author.
|- Disclaimer of Warranty:
Unless required by applicable law or agreed to in writing, author
provides this software on an "AS IS" basis, without warranites or
conditions of any kind, either express or implied, including, without
limitation, any warranties or conditions of title, non-infringement,
merchantability, or fitness for a particular purpose. You are solely
responsible for determining the appropriateness of using or
redistributing the Work and assume any risks associated with Your
exercise of permissions under this License.
|- Limitation of Liability:
In no event and under no legal theory, whether in tort (including
negligence), contract, or otherwise, unless required by applicable law
(such as deliberate and grossly negligent acts) or agreed to in
writing, shall the author be liable for any damages, including any
direct, indirect, special, incidental, or consequential damages of any
character arising as a result of this License or out of the use or
inability to use the software (including but not limited to damages for
loss of goodwill, work stoppage, computer failure or malfunction, or
any and all other commercial damages or losses), even if the author has
been advised of the possibility of such damages.
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