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Lecture 6

MODELLING-COMPOUND OBJECTS

Prepared by:

Rosiadi Bin Tajudin

KOLEJ KOMUNITI KEPALA BATAS – MINISTRY OF HIGHER EDUCATION



Learning objectives

At the end of this topic, you will be able to:

Explain the concept of lofting in Compounds objects.

State 5 types of deformation curves that can be used to modify 3D

model created using lofting.

Use lofting in creating 3D models.

Explain the concept of Boolean operation in Compound objects

correctly.State 3 types of Boolean operation and its functions.

Use Boolean operation in creating 3D models.



Makes use of 2D shapes to create the final 3D object.

Using combination of spline shapes and a spline path to

create the final complex objects.

The important term is cross-sectional shapes and a path.

Cross sectional shapes is used to define the perimeter shape of the exterior shell of the final 3D object.

Path is used to define the path the cross shape will travel.

Lofting



Lofting



Deformation is the process of applying modification to a

shape as its profile travels along the path.

5 types of deformation curves is:

1. Scale

2.Twist

3. Teeter

4. Bevel

5. Fit

Deformation curves



Deformation curves

Original

Scale Twist Teeter Bevel Fit



Tutorial 1

2. Creating objects using lofting.

4. Modify objects that have been created using deformation

curves.



Exercise 1

2. Create an object as below.

Objects:

Square, width = 40

Helix, R1 = 75, R2 = 45 and height = 100.

3. Then apply lofting on your objects.

4. After that modify your objects using deformation curves

(scale = 100, twist = 300, and teeter = 100)

5. Render the objects you have created in .jpeg file format andshow them to your lecturer.



Make use of two original 3D objects to create the final

Boolean object.

The two original objects reffered to as Operands: Operand A

and Operand B.

Operand A is the first object that we select and its turn to thefinal boolean objects.

Boolean operations



2. Union

Creates an objects that contains the volume of both original

objects.

3. Substraction

Creates an objects that contains volume of the first object.

4. Intersection

Creates an object that contains only the volume that was

common between the two original intersection objects.

Types of Booleanoperations



Types of Booleanoperations

Original

Subtraction IntersectionUnion



Tutorial 2

2. Creating objects using 3 types of Boolean operations.



Exercise 2

2. Create an object by using Boolean operation (Union,

subtraction, intersection). You may use any size as long as

the shape you used same as on figure below.

9. Render the objects that you have created in .jpeg file format

and show them to your lecturer.

Original Union Subtraction Intersection



Conclusion There are two common tools in Compound objects that can

be used to create 3D objects that is Loft and Boolean

operations.

Lofting objects can be modified by using deformation curveswhich have function such as scale, twist, teeter, bevel an fit.

While, in Boolean operation, there are three types of

operation can be apply on two objects to create new 3Dobject that is union, subtraction and intersection.



Thank you for beingattentive

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