Task 4 - Mesh Construction

How are 3D models constructed?

Different techniques

Extrusion Modelling

Extrusion modelling works simply by extruding shapes to make it look like another object an example of this would be when I use ProBuilder since I usually get a cube and extrude it out to create what I want which can be a room or something else such as a candle. Ill use the example of a room I used where I primarily used extrusion modelling

on this room i used extrusion to creat the floor, the walls, the table and the bookshelves

Box Modelling

Box modelling is a technique where you get a basic 3D shape usually a cube to try and make a rough draft/prototype of the final model that you will then make. You use a few tools such as the subdivide tool or other tools and repeat a few steps until you start to get the shape that you want, even though this type of modelling is simple it’s a easy way to get a lot of detail into your work.

This model is a Tyrannosaurus Rex that had started out as a simple shape that has been subdivided and changed to create a rough draft.

Primitive Modelling

A very easy and simple way to model is primitive modelling where you connect a bunch of primitive shapes together such as a Cube, Cylinder, Tube, Sphere, Torus, Cone to create what you want to have as a final product

this model of a train is a very simple thing and looks like it would be a very rough draft since it would take less than 5 minutes to complete since it's made up of squares and a couple of spheres for wheels.

Specialised Modelling

Polygonal modelling is a way to model objects by representing or approximating the their surface areas using polygons this way is the most effective way of modelling for real-time computer graphics

Image Based Modelling

Image based modelling is a modelling process where you use 2D images. This way is most useful in situations where the budget is restricted because of lack of funds so you can’t create all the assets manually

this model is being based off a picture of a teddy bear and is being made quite similar to the image since you can see both a picture as well as the model from both the front and the side at the same time.

3D Scanning

3D scanning is a high level modelling technique where an object or a person is scanned and analysed is used to generate an accurate polygonal or NURBS mesh.

these images show someone scanning in a woman with a 3D scanner and making a model of her which is quite similar to what she looks like.

https://en.wikibooks.org/wiki/Blender_3D:_Noob_to_Pro/Box_Modeling

http://3dmodelting.blogspot.co.uk/2014_01_01_archive.html

http://modelling3.blogspot.co.uk/

https://www.youtube.com/watch?v=7g4FhESB31M

http://on3dprinting.com/tag/3d-scanning/

Task 4 - Mesh Construction

How are 3D models constructed? Describe and explain the different modelling techniques available to a 3D designer.

Remember that you are trying to comprehensively explain the theory and applications of 3D with elucidated examples and consistently using subject terminology correctly.

This provides evidence Unit 66 – P1, M1, D1