Page 63 - ODV Training outline_EN

However, it is always a good practice, in function of the manufacturing
technology used, including 3D printing, to be aware of the technological

constraints that can influence the geometry of the model. A shape, with its
geometric details, can be more or less optimised for subsequent 3D printing, and
we will try to understand how and why.

Primitive Modelling: A First Step into the 3D World
Primitive modelling is indeed an excellent way to embark on a journey into the
world of three-dimensional modelling, especially suitable for learners starting

from the second grade. It can be likened to using an abacus for learning
arithmetic: essential and immediately understandable.

The initial approach could be a simple modelling exercise with Autodesk Tinkercad
(https://www.tinkercad.com/): constructing a basic model by iterating through the
following fundamental steps as needed – adding a primitive (cube, cylinder,
cone, etc.), scaling it, moving it, and rotating it according to the intended

goal. Repeat the process with other primitives, incorporating the ability, from the
second one onward, to create monolithic objects by grouping two or more

primitives. Also, consider that an "empty" primitive is subtracted from the rest of
the group since it is treated as negative volume.

Tinkercad: “solid” and “hole” primitives Tinkercad: “solid” and “hole” primitives

before creating a group after creating a group

Increasing Model Complexity with Primitive Modelling
In addition to the fundamental tools of scaling, rotation, movement, and creating

monolithic groups with primitives, Tinkercad offers the ability to mirror or
duplicate shapes. In the case of duplication, it's possible to duplicate a shape
along with its transformation, easily achieving circular or rectangular arrays of

objects. Furthermore, the obtained models can be exported in various formats,

Funded by the European Union. Views and opinions expressed are however those of the
author(s) only and do not necessarily reflect those of the European Union or the European
Education and Culture Executive Agency (EACEA). Neither the European Union nor EACEA can
be held responsible for them. Proposal number: 101087107.