🚀 go-pugleaf

In article <1992Apr16.131205.10032@fwi.uva.nl>, koelma@fwi.uva.nl (Dennis Koelma) writes:
|> Can anyone point me to a description of these member-function of Canvas ?
|> It seems that the sequence "push_transfrom, transform(matrix)" could
|> be simplified to "push_transform(matrix)" or is this not what it seems?
|> How do these functions interact ?

Canvas::transform does a matrix multiply to concatenate the given matrix
with the current one.  Canvas::push_transform and pop_transform save and
restore the current matrix on a stack.  It is common to follow push_transform
by transform, but

    c->push_transform(t1);
    c->push_transform(t2);

is quite a bit different from

    c->push_transform();
    c->transform(t1);
    c->transform(t2);

Thus, the current API is more general than the simpler one you propose.