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[inkscape.git] / src / libnr / nr-matrix.cpp

diff --git a/src/libnr/nr-matrix.cpp b/src/libnr/nr-matrix.cpp
index eb1f21d4793ff9c1528802bda0f76e578d154181..4f94dd3df4ee1ac2f9b5cecc253fad1d440251ab 100644 (file)
--- a/src/libnr/nr-matrix.cpp
+++ b/src/libnr/nr-matrix.cpp
@@ -219,7 +219,7 @@ bool Matrix::is_rotation(Coord const eps) const {
 
 
 /**
- *
+ *  test whether the matrix is the identity matrix (true).  (2geom's Matrix::isIdentity() does the same)
  */
 bool Matrix::test_identity() const {
     return matrix_equalp(*this, NR_MATRIX_IDENTITY, NR_EPSILON);
@@ -230,7 +230,7 @@ bool Matrix::test_identity() const {
 
 
 /**
- *
+ * calculates the descriminant of the matrix. (Geom::Coord Matrix::descrim() does the same)
  */
 double expansion(Matrix const &m) {
     return sqrt(fabs(m.det()));
@@ -288,4 +288,4 @@ bool matrix_equalp(Matrix const &m0, Matrix const &m1, NR::Coord const epsilon)
   fill-column:99
   End:
 */
-// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :