Give Vector constructors from one higher/lower dimension

[libs/math.git] / source / geometry / affinetransformation.h

diff --git a/source/geometry/affinetransformation.h b/source/geometry/affinetransformation.h
index 430619ed163702594f71b267e800e85b87876504..0e377baaa51d633186969ace978494d79edfccf1 100644 (file)
--- a/source/geometry/affinetransformation.h
+++ b/source/geometry/affinetransformation.h
@@ -168,46 +168,16 @@ inline AffineTransformation<T, D> invert(const AffineTransformation<T, D> &at)
        return r.invert();
 }
 
-
-template<typename T, unsigned N>
-inline LinAl::Vector<T, N+1> augment_vector(const LinAl::Vector<T, N> &v, T s)
-{
-       LinAl::Vector<T, N+1> r;
-       for(unsigned i=0; i<N; ++i)
-               r[i] = v[i];
-       r[N] = s;
-       return r;
-}
-
-template<typename T, unsigned N>
-inline LinAl::Vector<T, N-1> reduce_vector(const LinAl::Vector<T, N> &v)
-{
-       LinAl::Vector<T, N-1> r;
-       for(unsigned i=0; i<N-1; ++i)
-               r[i] = v[i];
-       return r;
-}
-
-template<typename T, unsigned N>
-inline LinAl::Vector<T, N-1> divide_vector(const LinAl::Vector<T, N> &v)
-{
-       LinAl::Vector<T, N-1> r;
-       for(unsigned i=0; i<N-1; ++i)
-               r[i] = v[i]/v[N-1];
-       return r;
-}
-
-
 template<typename T, unsigned D>
 inline LinAl::Vector<T, D> AffineTransformation<T, D>::transform(const LinAl::Vector<T, D> &v) const
 {
-       return reduce_vector(matrix*augment_vector(v, T(1)));
+       return LinAl::Vector<T, D>(matrix*LinAl::Vector<T, D+1>(v, T(1)));
 }
 
 template<typename T, unsigned D>
 inline LinAl::Vector<T, D> AffineTransformation<T, D>::transform_linear(const LinAl::Vector<T, D> &v) const
 {
-       return reduce_vector(matrix*augment_vector(v, T(0)));
+       return LinAl::Vector<T, D>(matrix*LinAl::Vector<T, D+1>(v, T(0)));
 }
 
 } // namespace Geometry