Monthly Archive: November 2018

3D Modeling And Computer Programs

3d modeling

3d modeling

The process of 3D modeling is actually a mathematical component one needs to develop in order to represent the surface of the object as a complete image. A model could be created using a computer program or by hand. Models created by hand are not very common nowadays; most designers prefer to work with a computer screen and keyboard to create prototypes.

The models generated on a computer screen like house rendering use a geometric equation connecting points or triangles, curves, lines and so on. These geometric equations can be created by hand on paper with the same collection of data points used in the computer rendering. Then they can be scanned into a computer for further manipulation.

There are many different computer software programs available for individuals who want to manipulate a photo rendering for more dimensions. These various programs allow the user to add and subtract depth and do the same for mesh. They can also stretch various aspects of a photo’s components. All of this gives a photo a life-like look.

If the metadata is compatible with other files, the person manipulating the photo can import other pieces of data into their photo to create more depth. There are many different techniques someone can integrate into a photo to make it seem real. The person doing the modeling can also map different textures into their photo to give it an even more real feel.

There are two types of representations with this type of models, solid and shell/boundary. The solid is like a rock, it will define the volume of the object you want to represent. They are a little more difficult to draw because they are more realistic in nature. This type of model, the solid model is used in engineering and medical simulated drawings to help doctors and city planners understand better what they need to do.

The shell/boundary types of models or drawings represent the boundary or surface of the object. This is the type of model or drawing that is used in video games. It is much easier to work with as a model and easier to draw for both beginners and experienced modelers.

As a freelance graphic designer computer graphics, boundary representations are the most common because of their appearance. The surface of the item needs to be what is represented most. This is because the exterior of the item you are representing is what is seen, however the interior is what gives the item its depth. All of these needs to come together and that is why you need the complex mathematical equations.

To bring everything together, many modelers use meshing. Instead of meshing squares or circles, they tend to mesh together triangles. Meshing together triangles is a popular way to render a scene from the abstract to something life-like for 3D modeling. This meshing of triangles can be done on paper or with a computer program with wonderful, multilevel results.

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How to Use SketchUp Make for 3D Design

how to use sketchup

Google SketchUp Make, a Simple to Use 3D Modeling CAD Package

There are several 3D CAD software applications available for high end and used for house rendering, detailed design in the area of engineering and architecture. High powered software comes with a corresponding price tag which can range from hundreds to thousands of dollars. Examples of 3D CAD software are AutoCAD, Solid Works, and Solid Edge. Google SketchUp Make is a free software package which can be upgraded to the pro version (SketchUp Pro) for about $600. The free version is useful for simple 3D design of images, diagrams, and graphics for websites and can be used free of charge for home, personal and educational use.

While Google bought the company @Last Software which originally developed Sketchup, the application is currently owned by Trimble Navigation.

Glossary

CAD: Computer Aided Design. The use of computers and software to create a virtual design. The design could be as simple as a schematic drawing of an electrical circuit or PCB layout or a more sophisticated 3D model of a building or animated model of a machine. A CAD design can be easily modified compared to a traditional pencil or pen and ink drawing, or real world 3D prototype

3D Modeling: The process of creating a virtual 3 dimensional object within a software package.

Rendering: Adding colors and textures to the surface faces of a 3D object

Wire Frame: A technique for creating and displaying 3D objects using frameworks of lines. Wire frame images display quicker than rendered images which was important before the days of fast computer systems and graphics cards

Ray Tracing: Creating photo realistic images by simulating the effects of interactions of light rays with objects in a virtual scene

A wire frame image
A wire frame image | Source

Designing a Switch – Start With 2D and Extrude

In the video below, I draw a rocker switch. Design involves drawing primitive 2D shapes initially, and then “pushing” and “pulling” to extrude the shape into a 3D solid. Once the shape is created, it can be exported to a JPG file.