Business and Computing Deanery 3D Modelling Tools Week 3 Transformations, cloning and arrays,...

Business and Computing Deanery

3D Modelling Tools

Week 3 Transformations, cloning and arrays, modifiers

3D Modelling Tools 2

Last weekLecture Parametric modelling

Creating primitives Naming objects Assigning colours Altering parameters Standard and extended primitives

Selection of objects Transformations


This weekLecture Transformations Cloning and arrays Grouping Modifiers


From last week Define and describe the term

Cartesian coordinates Why can setting the units be

important for models? Why is intersecting meshes a

problem in modelling? What are the three methods of

transform used in 3ds Max?


What is 3D? 3D graphics -2D representation of

3D objects – flattened Objects exist in the memory of the

computer No physical form Numbers and mathematical

formulas


3D software Enables you to create a scene, fill it

full of objects Apply materials to the objects Lighting Virtual cameras Animation View

Make a video Export as a 3D model


Snaps toolbar Snap objects to each other

Face Midpoint Endpoint Edge

Murdock K.L., (2005)


Snaps activity Make a methane molecule

One carbon atom Four smaller hydrogen atoms

Set Snap options to Grid and Vertex Create a tetrahedron primitive

Set the parameter to 1 Add spheres using Snap 3D



Cloning objects Cloning is the process of creating

copies of objects These copies can maintain an

internal connection Instance Reference



Array An array is a set of regularly ordered

objects Usually in a pattern

Rows or columns Circle



Cloning with Max First select the object Three ways to achieve a clone

Edit > Clone Crt+C Crt+V Transform the object whilst holding the

Shift key Name the clone


Clones Copies

Maintains no links to the parent Instances

An instance is an interchangeable clone of the original. Modifying an instanced object is the same as modifying the original.

When you change one instance all the other instances change with it.

References References are like "one-way" instances. Any modification made to the original object is passed

on to its references, but any modification made to a reference is not passed back to the original.

3ds max v7, (2005)


Cloning activity Create a flat surface, like a tray Place a teapot on top of the tray Clone the teapot

Make a copy Make an instance Make a reference

Change the colours of the parent and clones, what happens?

Change the sizes, what happens?


Mirror Cloning of symmetrical parts You specify an axis Clone options

No clone Copy Instance Reference

3ds max v7, (2005)


Mirror activity Make a torso from cylinders Add an arm/hand from cylinders Make a mirror Repeat for a leg


Arraying Specification of

dimensions offsets and transformation values What are the

differences in these arrays?

3ds max v7, (2005)


Linear array What are the differences between

these arrays?

3ds max v7, (2005)


Circular and spiral arrays Circular arrays

Rotation around a common centre rather than movement along an axis

Important to choose the Transform centre first Spiral arrays

the direction of rotation determines the direction of the spiral: which way it winds up or down.

Enter a positive rotation for a counterclockwise spiral.

Enter a negative rotation for a clockwise spiral.


Transform centres The geometric

center for scale and rotate operations Use Pivot Point

Center Use Selection Center Use Transform

Coordinate Center

3ds max v7, (2005)


Array activity Create linear arrays of primitives

1D 2D 3D

Create a circular array Create a spiral array


Modifiers Murdock K.L. (2005) compares

modifiers to a set of tools in a wood workshop

Modifiers can be used for example to Reshape objects Apply material mappings Deform an object’s surface

In 3ds Max there are many, many modifiers


Modifier stack Manager for all modifiers applied to one

object First is the Base object Use the stack to:

View and manipulate the sequence of modifiers Find a particular modifier Adjust a modifier's parameters Select a modifier's gizmo or center Activate or deactivate a modifier Delete or disable a modifier


Modifier types Far too many to list Covered in more depth in later

lectures

Today: Parametric modifiers Affect the geometry of objects

Pulling, pushing, stretching, bending, twisting


What are the modifiers?

3ds max v7, (2005)


Modifier activity Create some primitives Apply

Stretch Ben Taper Twist Melt


What should you be working on?

Your presentation Week 7

Portfolio 1 Next week


Impendent study Directed reading 3DS Max 7 Bible

By now you should have read Chapters QS, 1, 2, 5, 6, 7, 8 and 9

Read Chapter 12 for Week 5 Finish off Animated Still life, Space

Scene and the Chess set tutorial


Questions 1 You have been asked to model a

display of soft drink cans What technique would you use?

Describe the parameters used to position them

Give suitable dimensions How would you “damage” some of the

cans? What are the 3 different methods of

cloning, discuss in the context of the “damaged” cans


Questions 2 You have been asked to model some

robots Describe the method to make

symmetrical elements of the model Describe the terms grouping or linking

and make a recommendation of which to use with the elements of the robot

Describe the technique you would use to position 20 robots in a circle


References 3ds max v7, (2005) User Reference

and Tutorials Murdock K.L., (2005) 3DS Max 7

Bible, John Wiley & Sons Inc, ISBN: 0764579711

Business and Computing Deanery 3D Modelling Tools Week 3 Transformations, cloning and arrays,...

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