gsl-shell.git - gsl-shell

diff --git a/agg-plot/utils.cpp b/agg-plot/utils.cpp
index 7f6f8697..eb0e908a 100644
--- a/agg-plot/utils.cpp
+++ b/agg-plot/utils.cpp

@@ -14,3 +14,10 @@ trans_affine_compose (agg::trans_affine& a, const agg::trans_affine& b)

a.tx = b.sx * a_tx + b.shx * a_ty + b.tx;

a.ty = b.shy * a_tx + b.sy * a_ty + b.ty;

}

+

+agg::trans_affine affine_matrix(const agg::rect_i& r)

+{

+ double w = r.x2 - r.x1, h = r.y2 - r.y1;

+ double tx = r.x1, ty = r.y1;

+ return agg::trans_affine(w, 0.0, 0.0, h, tx, ty);

+}