DOMMatrixReadOnly: scale3d() method

The scale3d() method of the DOMMatrixReadOnly interface creates a new matrix which is the result of a 3D scale transform being applied to the matrix. It returns a new DOMMatrix created by scaling the source 3d matrix by the given scale factor centered on the origin point specified by the origin parameters, with a default origin of (0, 0, 0). The original matrix is not modified.

To mutate the matrix as you 3D-scale it, see DOMMatrix.scale3dSelf()

Syntax

scale3d()
scale3d(scale)
scale3d(scale, originX)
scale3d(scale, originX, originY)
scale3d(scale, originX, originY, originZ)

Parameters

scale

A multiplier; the scale value. If no scale is supplied, this defaults to 1.

originX Optional

An x-coordinate for the origin of the transformation. If no origin is supplied, this defaults to 0.

originY Optional

A y-coordinate for the origin of the transformation. If no origin is supplied, this defaults to 0.

originZ Optional

A z-coordinate for the origin of the transformation. If this value is 0, the default if omitted, the resulting matrix may not be 3d.

Return value

A DOMMatrix.

Examples

const matrix = new DOMMatrix();
console.log(matrix.toString()); // no transforms applied
// matrix(1, 0, 0, 1, 0, 0)

console.log(matrix.scale3d(2).toString());
/* matrix3d(
    2, 0, 0, 0, 
    0, 2, 0, 0, 
    0, 0, 2, 0, 
    0, 0, 0, 1) */
console.log(matrix.scale3d(0.5, 25, 25, 1.25).toString());
/* matrix3d(
    0.5, 0, 0, 0, 
    0, 0.5, 0, 0, 
    0, 0, 0.5, 0, 1
    2.5, 12.5, 0.625, 1) */
console.log(matrix.toString()); // original matrix is unchanged
// matrix(1, 0, 0, 1, 0, 0)

Specifications

Browser compatibility

See also

• DOMMatrix.scale3dSelf()
• DOMMatrixReadOnly.scale()
• CSS transform property and scale3d() and matrix3d() functions
• CSS transforms module
• SVG transform attribute
• CanvasRenderingContext2D interface's CanvasRenderingContext2D.transform() method