2. Computer-Aided Design

Model (raster, vector, 2D, 3D, render, animate, simulate, ...) a possible final project

Raster, vector, 2D

I have been using raster and vector design tools in setting up the personal web site.

I have been using GIMPI to resize images and add borders. I have also played around with the layer concepts, adding an alpha layer for transparency and making transparent some parts of a picture:


I have made sketches of the possible final project (check the project section) using Open Office Draw, which is identical to LibreCAD. Here's the link to both the .gdraw and .svg files: Grass sketch .gdraw; Grass sketch .svg; Grass stand exploded view .gdraw; Grass stand exploded view .svg

Besides quick sketches, I find 2D Vector software particularly useful for drawing process flow diagrams. This is an example I made using Inkscape for the final project: Thermal balance _final .svg

Inkscape overview

I focused on Inkscape and its functionalities in order to be able to, besides making sketches and drawing flowcharts, easily make any type of remark on images, which is essential when you are documenting your work.

Drawing objects

Inkscape let’s you easily modify the size, shapes, corners of objects like squares, circles, polygons, lines by moving handles. You can also quickly draw pie-chart sections.

Formatting

The Fill and Stroke tool lets you easily format the object: fill and stroke color and pattern.

Lines

The ability to draw lines of different shapes and formatting is particularly useful if you need to highlight parts of an image.

Text

A wide range of functionalities are also available to write and format text: family, style, size, alignment, direction and all the fill and strike functionalities.

An example of remarks over an image.

Layers

Inkscape lets you place objects in layers so that you can work with group of objects. For example, in the Thermal balance flowchart above, I placed shapes in different layers according to the concepts I needed to illustrate: thermal flow, external boudary, internal boudary, devices, temperature. This helped me conceptualize the drawing layout.

Hiding devices.

3D, render

I have started the construction drawing of the adaptive pot stand using Fusion 360. I had already selected Fusion some time ago due to its broad range of tools. I especially like the assembly features and the subsequent animation capabilities. Moreover, it’s a free package for “... students, enthusiasts, hobbyists, and startups …”.

We had a brief class tutorial with Rhyno. It is certainly a good tool but the drawing approach reminds me of the time when I used a drawing board. Things must be clear in your mind before attempting to draw any line. Fusion, instead, is more “crative” and let’s you develop idea as you draw.

Here's the link to the Autodesk A360 page (e-mail needed for download): Grass assembly. The file can also be downloaded at this link (no e-mail needed): Grass Assembly .step

Animate, simulate

Game engines are really fascinating and I decided I wanted to make an animation. Actually, it would really be fun to animate the sequence of sketches in the Project section, where I show how the stand reacts to changes in ambient conditions. After an overview of the list of available tools and their animation capabilities, I opted for Blender. It looks powerful and accessible. I started taking a tutorial (Blender Absolute Beginner Tutorial by jacob Lewis). Though the learning curve looks somewhat steep, I may be able to post a cartoon in the next days.