set-ctx
set-ctx()
An advanced element that allows you to modify the current canvas context.
Note: The transformation matrix (transform
) is rounded after calling the callback
function and therefore might be not exactly the matrix specified. This is due to rounding errors and should not cause any problems.
// Setting a custom transformation matrix
set-ctx(ctx => {
let mat = ((1, 0, .5, 0),
(0, 1, 0, 0),
(0, 0, 1, 0),
(0, 0, 0, 1))
ctx.transform = mat
return ctx
})
circle((z: 0), fill: red)
circle((z: 1), fill: blue)
circle((z: 2), fill: green)