Vazios

The «empty» is a single coordinate point with no additional geometry. Because an empty has no volume and surface, it cannot be rendered. Still it can be used as a handle for many purposes.

Primitives

../_images/modeling_empties_draw-types.png

Empty Display Types.

Eixos planos

Displays as six lines, initially with one pointing in each of the +X, -X, +Y, -Y, +Z, and -Z axis directions.

Setas

Displays as arrows, initially pointing in the positive X, Y, and Z axis directions, each with a label.

Seta única

Displays as a single arrow, initially pointing in the +Z axis direction.

Círculo

Displays as a circle initially in the XZ plane.

Cubo

Displays as a cube, initially aligned to the XYZ axes.

Esfera

Displays as an implied sphere defined by three circles. Initially, the circles are aligned, one each, to the X, Y, and Z axes.

Cone

Displays as a cone, initially pointing in the +Y axis direction.

Imagem

Empties can display images. This can be used to create reference images, including blueprints or character sheets to model from. The image is displayed regardless of the 3D display mode.

Empty Displays settings can be accessed from Properties ‣ Object Data ‣ Empty panel.

Offset X, Y

Offset the image origin (where 1.0 represents the width/height of the image).

X=0.5, Y=0.5

Object origin at image center.

X=0.0, Y=0.0

Object origin at image bottom, left.

X=1.0, Y=1.0

Object origin at image top, right.

Depth
Default

Use normal depth behavior.

Front

Always display on top of other objects.

Back

Always display behind of other objects.

Dica

When using the image as a reference for modeling, it can be useful to set the depth to Front, with a low Opacity.

Side
Both

Display both the front and back of the empty.

Front

Only display the front of the image.

Back

Only display the back of the image.

Dica

This is useful if you’re using an image as a reference where you have photos from both the front and back, so two empty images can be set only to show when viewed from the correct side.

Show in
Orthographic

Show in orthographic view.

Perspective

Show in perspective view.

Dica

It’s often useful to disable this so reference images don’t get in the way when viewing a model.

Only Axis Aligned

Only displays the image contents when the view is aligned with the object’s local axis.

Transparency

Use alpha blending instead of alpha-test (blends with the background but can have depth sorting artifacts).

Opacity

Fade the image to make it transparent (uses the object Color’s alpha component).

Editing

An empty can only be edited in Object Mode, which includes its transformation and parenting properties. For other tools see the Object section.

Aplicar escala Ctrl-A

While empties don’t exactly have any object data attached to them which can be used for supporting «true» apply scale (i.e. with non-uniform scaling), they do have Display Size which controls how large the empties are displayed (before scaling). This works by taking the scale factor on the most-scaled axis, and combines this with the existing empty Display Size to maintain the correct dimensions on that axis.

Propriedades

Display As

The Primitives empty type to display in the 3D Viewport.

Tamanho

Controla o tamanho da visualização dos objetos do tipo «vazio». Isto não altera a sua escala, mas funciona como um deslocamento.

Utilização

Os objetos do tipo «vazio» podem servir como manípulos de transformação. Alguns exemplos das maneiras de utilizá-los incluem:

Objeto parente para um grupo de objetos.

An empty can be parented to any number of other objects. This gives the user the ability to control a group of objects easily, and without affecting a render.

Alvo para restrições

Um objeto do tipo vazio também pode ser usado como um alvo para as normais, ou restrições de ossos. Isto oferece ao usuário muito mais controle; por instância, um arranjo pode ser facilmente definido para habilitar a câmera para ser apontada em direção a um vazio usando a restrição do tipo Rastrear para.

Deslocamento de matrizes.

Um objeto do tipo «vazio» pode ser usado como deslocamento para um modificador do tipo Matriz, o que significa que deformações complexas podem ser obtidas pelo simples deslocamento de um objeto.

../_images/modeling_modifiers_generate_array_example-fractal-1.jpg

Um exemplo de um objeto do tipo «Vazio» sendo usado para controlar uma matriz.

../_images/modeling_empties_example-track-to-simple.png

An example of an empty being used to control the Track To constraint.

Outras utilizações comuns:

  • Substitutivos

  • Controles de arranjos de animação

  • Distâncias de profundidade de campo (DOF ou PdC)

  • Imagens de referência