css-mat4
Build a 4x4 matrix from 3D rotation, translation, scale and 2D skew according to the CSS3 transforms spec.
var compose = var matrix = //now you can do something with the 16-float matrix array...
Components default to zero (or one in the case of scale
) to allow for 2D vectors:
Usage
matrix = compose(out[, opt])
Composes a matrix from the given components, storing the result in out
and returning it. If opt
is not specified, an identity matrix is returned.
The options:
translate
an array of[x, y]
or[x, y, z]
in pixelsrotate
an array of[x, y, z]
in radiansscale
an array of[x, y]
or[x, y, z]
(z component defaults to 1)quaternion
can be specified ifrotate
is undefined; it's an array of[x, y, z, w]
componentsskew
an array of[x, y]
in radians, akin to the CSS skew(x,y) operation, which applies the skew togetherskewX
,skewY
numbers in radians, allowing the skews to be applied independently
The order of operations:
Builds a translation matrix, then applies the quaternion rotation. The matrix is then multiplied a 2D skew(x,y) matrix, and then multiplied by the independent X and Y skew matrices. Finally multiplied by scale to get the resulting recomposed matrix.
License
MIT, see LICENSE.md for details.