Geometric Theory, Mesh construction & Constraints

Geometric Theory, Mesh construction & Constraints

Polygons

Polygons are how many different sections are on your model and it shows it liked this on your model the less polys you have the easier it is to load up and unwrap your model as there’s less sections to it.

Vertices

Vertices are the corners on the edges of your shape like here for example you can adjust these corners by dragging the edges to make your model a different shape and larger.

Extrusion Modelling

Primitives
Primitives are the default models that you can then use to modify it to change the shape the main primitives are shown in the image on the right the main ones are sphere, cube, cone and cylinder. So if for example you wanted to make a bottle the cylinder will probably be the best one to use to start with before you start editing it as that's the closest shape to a bottle out of all of them.

Edges
Edges are like the vertices but the whole edge of model is considered the edge like the yellow lines here for example and you can adjust these like how it's shown here and move them to curve the edges for example.




Faces
Faces are the flat surfaces on the model like the white parts shown here you can edit these and change the size but this will change the whole shape of the product as the edges will increase in size also as they need to follow along the the face and connect to it.






                               Extrusion Modelling


Extrusion is when you can extrude your model and make certain parts stick out like here or you can do the opposite and make it cave into the model to give it a more realistic shape. The way this is done is you’ll first need to select the face you want to extrude then inset to the size you want the thing you’re extruding to be and then you can extrude it how much you want by putting a number in. The higher the number the more it’ll extrude.


3D Modelling Constraints

There are three main constraints you need to consider when 3D modelling one is the polygon count this needs to be as low as possible as it will take a lot longer to render your model if it has a very high poly-count. File Size is also another important constraint because video games are often put onto discs with limited storage on them meaning you have to get everything you’ve made on the disc as games are becoming more advanced they are now being put onto two discs due to the amount of information in the game.