Week 3: Computer-Aided Design

Assignment:Model (draw, render, animate, simulate, ...) a possible final project, and post it on your class page with original 2D and 3D files

In this week assignment, we need to familiarize with 2D and 3D designing and modeling. I don't have much experience in 2D and 3D designing I need to start from root level. Initially, I start with a 2D design using Gimp, My paint, Inkscape, After completing 2D design I start with Solidworks and Autodesk Inventor for 3D modeling.

2D design

3D design

This is the first time I hear about raster and vector images.So i searched in google and find out two links that help me to under stand what is raster images and vector images

Raster and Vector Images

There are two types of images Vector and Raster . Raster images are created with pixel based programs,they are commonly available in genral formats like jpg, gif, png, and are widely used on the web. Vector graphics are created with vector software and are common for images that will be applied onto a physical product.

Refer these links i used to learn link1, link2


GIMP is a free and open-source raster graphics editor used for image retouching and editing, free-form drawing, converting between different image formats, and more specialized tasks.

Installing Gimp

Gimp is opensource software so we can install it through ubuntu software center or Terminal.For me terminal is easy so i go with that way. I open terminal by using Ctrl+Alt+T and type

                  sudo apt-get install gimp

After installing GIMP I start working on that, I follow the tutorial that I saw on the website. Refer this link used to learn how to use gimp software for image editing. Important Key controls used in GIMP : Shift+E (export),Ctrl+N(new file) ,Ctrl+O(open file),Shift+C(Crop),Shift+T(Scale),Shift+F(flip) and (Shift +E Eraser).

Working on GIMP: Go through the tutorial in gimp website and design a logo in gimp software.

My Second Tutorial Work using GIMP : Refering GIMP website .In this tutorial i gone through Selective Colorization


MyPaint is a free and open-source raster graphics editor for digital painters with a focus on painting.it a fluid like software rather than gimp.

Installing MyPaint

Here i Install MyPaint using ubuntu software center.

After installing i open Mypaint I Just create a picture using brush and symmyery key (Butterfly shaped in menu bar)

After that i colured that image using diffrent brush syles that available in menu bar.

Informations and working of my paint software is got from this source


Inkscape is an open-source vector graphics editor .Inkscape use Scalable Vector Graphics (SVG), an open XML-based W3C standard, as the native format.I am new to this software so i need to install this software in my pc . After installing I go through this this webpage to study How to use Inkscape?.

Installing Inkscape

Open command terminal by pressing Ctrl+Alt+T and Type

sudo apt-get install Inkscape

After installing Inkscape i start working on that by simply follow the learning resources that i simply found on the Inkscape main page .Resurces for learning are available in inkscpe webpage. This page is well documented and give lot of informations about how to perform editing in inkscape .For me this first experience working with 2D desiging.This page helpd me to learn basics of drwaing , how to perform bit map. what we need to consider editing a image etc.

Important Key controls used in Inkscape:Ctrl+arrow keys to scroll by keyboard ,Shift with the wheel to scroll horizontally,undo your last action, press Ctrl+Z,redo the undone action by Shift+Ctrl+Z,duplicating an object Ctrl+D

First I go with drawing star of 6 corners, change the stoke and round value that I got a small sticker . Hence I draw a star and also change storke value

Select Star and press Shift+Ctrl+C Object to path and select start to the back by Object > Lower to Bottom. With both shapes selected,then i perform Path > Difference.

Tracing BitMaps

Bitmap tracing is the important feature of inkscape.I open my photo in inkscape and perfrom the bitmap function available in that.In oder to trace bitmap press Shift+Alt+B

3D Designing and Modeling

3D design is the process of using software to create a mathematical representation of a 3-dimensional object or shape. The created object is called a 3D model and these 3-dimensional models are used for computer-generated. I am not familiar with 3D modeling so I need to start from basics, in order to learn and do 3D designing, modeling we need to use some software. I choose Fusion 360, Autodesk Inventor, Rhino and Solid Works.

Fusion 360

Fusion 360 free 3D CAD/CAM design software for students.i install fusion 360 on my windows system and work on that.I refer the tutorials seen in their autodesk website to learn. Link of tutorials i refered

My Work

First click sketch and choose the appropriate plane, Draw the basic shape of the part, here I planned to design a 3D model of stool. So Fist I draw a square of 50mm and then extrude the 2D shape into the required thickness to get the 3D profile. After creating the 3D profile and I create a new sketch in one of the sides and perform cut function similar function is done on another side to so I got the 3D shape of stool.

2D sketch of square of size 50x50mm
3D excrude model of square of size 50x50mm
2D sketch on one of the face to create legs
Cut function to create legs
Create 2d Sketch on the other end and perform cut function
Draw a circle in one of the leg to perform some modification on stool legs

After gettingthe 3D shape , i perform cut function on the legs of stool and also perform fillet function to round the edges of the model giving an appropriate radius of curvature.

Perform cut function on stool legs
Perform fillet operation on legs of stool
Final Design

Autodesk Inventor

After My work with fusion 360 , i just go with Inventor 2015.Autodesk Inventor is a computer-aided design application for 3D mechanical design, simulation, visualization, and documentation developed by Autodesk.Functions are almost similar and its seems more compactable for mechanical desiging..

My Work

To familiarise the tools I want to make a simple mechanical nut. First I need to create a new file, open the inventor and select standard. Apt.It opens the work windows. After opening the work window, I select the planes XY, YZ.ZX and select sketch chose front view and drew a circle then finish the sketch. After finishing the sketch, I extrude the circle.

After extruding I got a cylindrical shape ,then perform fillet function on both sides of the cylinder .After that, I draw two circles on the front face of the circular shape I extrude and then draw a six-sided polygon in which corners are touched inside the cylinder outer circle and perform extrude function (cut) after once again extrude (cut) the inner circle of Nut. After that, I add a thread to inner portion.


Rhinoceros apart form other softwares these are not parametric but here I can do parts in a single file , for other software we need to do in different files and after completion we need to assemble them .

My Work

Open a new file, perform a sketch using polyline command, after completion of the sketch, select the curve and perform revolve function.After performing revolve I got a 3D model of a flower pot.

After making flower pot , i just download a bottle image from google and open it in rhino using pictureframe command then using scale command and polyline command to draw bottle outline.

What i did is only draw half side of front view and then perform the revolve fuction with respect to axis which passing through the center of image and finally i made the 3D model of bottle. .


During this week I familiarise with Fusion360, Rhinoceros,Autodesk Inventor. After learning a single software, I gain confidence that I can try any software.

For the press-fit construction kit design I tried Autodesk Inventor (Link) and for 3D printing a model that cannot be manufactured using additive technology I use Solidworks (Link) and for Big Machine week (Shopbot) again goes with Solidworks and Fusion (Link). And for Wildcard, I go with Fusion360. After all these, I completed as much software I can.

For the Final project, I planned to use fusion360 for modelling the case of my project: Final project Link