diff options
Diffstat (limited to 'utils/hacks/TreeGraphs/Graphics/Geometry/mat2.py')
| -rw-r--r-- | utils/hacks/TreeGraphs/Graphics/Geometry/mat2.py | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/utils/hacks/TreeGraphs/Graphics/Geometry/mat2.py b/utils/hacks/TreeGraphs/Graphics/Geometry/mat2.py new file mode 100644 index 00000000..05320d5e --- /dev/null +++ b/utils/hacks/TreeGraphs/Graphics/Geometry/mat2.py @@ -0,0 +1,20 @@ +import vec2 + +def det(m): + ((m00,m01),(m10,m11))= m + + return m00*m11 - m01*m10 + +def mul(a,b): + b_trans= zip(* b) + return tuple([transmulvec2(b_trans, a_r) for a_r in a]) + + # multiple vector v by a transposed matrix +def transmulvec2(m_trans,v): + return tuple([vec2.dot(v, m_c) for m_c in m_trans]) + +def mulvec2(m,v): + return transmulvec2(zip(* m), v) + +def mulN(m,N): + return tuple([vec2.mulN(v,N) for v in m]) |