For modeling a virtual object we use combinations of primitive meshes that we can add to the world. To add a primitive we select Add | Mesh in the superior bar. We have 10 primitives:
You can add a primitive at a defined position of the Ground. By example, to add a Cube in the central position a little over the ground.
1 - Change the Top View to show only Wireframe.
2 - In the Top and Front Views, clicks in the point.
3 - Select Add | Mesh | Cube in the superior bar.
4 - Zoom at the Views to see better the object.
Normally we do many things with the primitives until we have some model (a car, a chair etc.):
At this lesson we will talk about some deformations. But, first of all: some other basic concepts.
At the bar of each View we have the options: Object Mode, Edit Mode, UV Face Select.
To select an object we need to be at Object Mode and rightclick it. Appears a violet aura.
To select many objects press "Shift" with the rightclicks.
To TIP: To erase an object selected, press the "Delete" keyboardkey.
To move objects: selected the object, press "G" (grab), move the pointer over the View you like.
IMPORTANT: Different of the usual Windows behavior, to "focus" a View you don't need to click it. Only the pointer needs to be over it.
If the object is selected we can move it also at Edit Mode.
To stop the movements, liberating the objects: click.
Now, the deformations. Imagine that, having the 2 x 2 x 2 Cube, we would like to create a paralelogram, at any position, having the dimensions:
12 in the direction West-East (WE);
7 for Up;
1 in the direction South-North (SN).
The idea is to move - pull or push - faces selected of the basic Cube.
To move something we need first to select. To select a face you need to be at Edit Mode and click the button "Face select mode". Look the figure:
At each face appears a black point. Rightclick the face to select it. It will have a violet color.
REMEMBER: To deselect all: "A".
Like our paralelogram will have "SN" equal 1, we will push the South face of the Cube. Sometimes the Perspective View is the best to do selections; sometimes to rightclick the edge at some other View.
To move a face we select it, and pressing "G", we move the pointer at some View. Here the Top View is the best to do the movement.
To stop the movement: click!
IMPORTANT TIP: To "Undo" a wrong movement at Edit Mode press "U". You can view a list of previous operations pressing "Alt" + U. Appears a popup menu. Click the operation you would like to return.
To "Redo" click "Shift" + U.
TIP: A popup menu in Blender appears where the pointer is. To disapear, move the cursor out of it and wait a little.
To do "Up" equal 7, we select the top face and pull (pressing "G" etc.) it at the Front View.
To stop the movement: click!
And to do "WE" equal 12, we select the East face. We can use the Top or Front View to do the movement.
To stop the movement: click!
And we have our paralelogram.
This is only an exercice of modeling. We will NOT do anything more (Save, Export etc. etc.).
At the next lesson we will learn some other deformations.
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