This document discusses different types of 3D modeling including wireframe models, surface models, and solid models. It focuses on solid modeling which provides a complete, valid, and unambiguous geometric representation of physical objects. Solid models contain geometric and topological data and can be represented using constructive solid geometry (CSG) which constructs objects by combining simpler solid objects called primitives using Boolean set operations like union, intersection, and difference. CSG starts with basic primitives that are combined and recombined to model complex objects.
Reverse Engineering
Definition
It is described in Wikipedia as:
… the process of extracting knowledge or design information from anything man-made. The process often involves disassembling something (a mechanical device, electronic component, computer program, or biological, chemical, or organic matter) and analyzing its components and workings in detail.
Reverse Engineering
Definition
A process of discovering the technological principles of a human made device, object or system through analysis of its structure, function and operation
Systematic evaluation of a product with the purpose of replication.
Design of a new part
Copy of an existing part
Recovery of a damaged or broken part
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Reverse Engineering
Definition
It is described in Wikipedia as:
… the process of extracting knowledge or design information from anything man-made. The process often involves disassembling something (a mechanical device, electronic component, computer program, or biological, chemical, or organic matter) and analyzing its components and workings in detail.
Reverse Engineering
Definition
A process of discovering the technological principles of a human made device, object or system through analysis of its structure, function and operation
Systematic evaluation of a product with the purpose of replication.
Design of a new part
Copy of an existing part
Recovery of a damaged or broken part
An important step in the product development cycle.
bueno es un trabajo es una ayuda aquellas niños y jóvenes que tiene problemas de violencia en su casa y en su entorno y sobre lo que afecta la violencia a la sociedad
By the end of this presentation you will be able to:
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• Identify definite and indefinite articles and
possessive adjectives.
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Ethnobotany and Ethnopharmacology:
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Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
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http://sandymillin.wordpress.com/iateflwebinar2024
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1. Active Learning Assignment
On
Solid Modeling
GANDHINAGAR INSTITUTE
OF
TECHNOLOGY
Computer Aided Design (2161903)
Prepared By:-
Ayush Upadhyay
(150123119053)
Guided By:-
Prof. Dhaval Patel
4. Three-Dimensional Modeling
3-D models include X, Y, and Z dimensions
Allows better definition of three-dimensional
objects
There are three general types of 3-D models
- Wire Frame Models
- Surface Models
- Solid Models
5. Wire Frame Models
Oldest form of 3D modeling
Old technology - not used
today
Model Contains edges and
vertices
Cannot represent complex
surfaces
No details regarding interior
of part
Ambiguous
8. Surface Models
Came after Wireframe models
Still used today
Model Contains edges and
vertices and exterior surfaces
Can represent complex
exterior surfaces
No details regarding interior
of part
Too ambiguous for
engineering analysis
9. Solid Models
Current “state of the
art”
Model Contains edges
and vertices , exterior
surfaces, and interior
details
Part is unambiguously
defined
May be used for
engineering analysis
10.
11. Why Solid Modeling?
Recall weakness of wireframe and surface modeling
Ambiguous geometric description
incomplete geometric description
lack topological information
Tedious modeling process
Awkward user interface
12.
13.
14. Solid model
Solid modeling is based on complete, valid and unambiguous
geometric representation of physical object.
Complete points in space can be classified.(inside/
outside)
Valid vertices, edges, faces are connected properly.
Unambiguous there can only be one interpretation of
object
Analysis automation and integration is possible only with solid
models has properties such as weight, moment of inertia, mass.
Solid model consist of geometric and topological data
Geometry shape, size, location of geometric elements
Topology connectivity and associatively of geometric
elements non graphical, relational information
23. Constructive solid geometry (CSG)
Objects are represented as a combination of simpler solid objects
(primitives).
The primitives are such as cube, cylinder, cone, torus, sphere etc.
Copies or “instances” of these primitive shapes are created and
positioned.
A complete solid model is constructed by combining these “instances”
using set specific, logic operations (Boolean)
Boolean operation
each primitive solid is assumed to be a set of points, a boolean
operation is performed on point sets and the result is a solid model.
Boolean operation union, intersection and difference
The relative location and orientation of the two primitives have to
be defined before the boolean operation can be performed.
Boolean operation can be applied to two solids other than the
primitives.
24. Constructive Solid Geometry Methods
Constructive Solid Geometry (CSG)
performs solid modelling by generating a new
object from two 3-dimensional objects using a
set operation
Valid set operations include
Union
Intersection
Difference
27. Constructive Solid Geometry Methods
(cont…)
CSG usually starts with a small set of
primitives such as blocks, pyramids, spheres and
cones
Two objects re initially created and combined
using some set operation to create a new object
This object can then be combined with another
primitive to make another new object
This process continues until modelling
complete
