Simplify and add geom. and matrix utility functions

Signed-off-by: pacien <pacien.trangirard@pacien.net>

1 files changed, 19 insertions, 0 deletions

diff --git a/src/common/geom.c b/src/common/geom.c
index 7abb422..219270f 100644
--- a/src/common/geom.c
+++ b/src/common/geom.c
@@ -1,5 +1,24 @@
 #include "common/geom.h"
+#include "morpher/matrix.h"
+
+CartesianMapping m(int x, int y) {
+  return (CartesianMapping) {{x, y},
+                             {x, y}};
+}
+
+CartesianVector v(int x, int y) {
+  return (CartesianVector) {x, y};
+}
+
+bool mappings_equals(CartesianMapping m1, CartesianMapping m2) {
+  return vector_equals(m1.origin, m2.origin) && vector_equals(m1.target, m2.target);
+}
 
 bool vector_equals(CartesianVector v1, CartesianVector v2) {
   return v1.x == v2.x && v1.y == v2.y;
 }
+
+IntVector triangle_area(CartesianVector v1, CartesianVector v2, CartesianVector v3) {
+  return matrix_int_det2(v1.x - v3.x, v2.x - v3.x,
+                         v1.y - v3.y, v2.y - v3.y);
+}