Scale

Note: This documentation is for the old 0.1.0 version of A-Frame. Check out the documentation for the current 1.5.0 version

The scale component defines a shrinking or stretching transformation of an entity. It takes three scaling factors for the X, Y, and Z axes. All entities inherently have the scale component.

The example below shrinks the entity in half along the X direction, maintains the same scale factor along the Y direction, and stretches the entity by two-fold along the Z-direction:

<a-entity scale="0.5 1 2"></a-entity>

Note that the scaling factors cannot be 0 or else the matrix transformations in WebGL will break.

Value	Description	Default Value
x	Scaling factor in the X direction.	1
y	Scaling factor in the Y direction.	1
z	Scaling factor in the Z direction.	1

Reflection

Scaling factors can be negative, which results in a reflection.

A notable use for this is for sky spheres. Sky spheres contain the entire scene and have a texture mapped on the interior surface. To accomplish this, we can reflect, or invert, the sphere in the Z-direction.

<a-entity geometry="primitive: sphere; radius: 1000"
          material="src: sky.png"
          scale="1 1 -1"></a-entity>