1 files changed, 6 insertions, 0 deletions

diff --git a/geometry.h b/geometry.h
index 3d99b41..7b4402d 100644
--- a/geometry.h
+++ b/geometry.h
@@ -7,6 +7,7 @@ typedef double Matrix3[4][4];
 typedef struct Quaternion Quaternion;
 typedef struct RFrame RFrame;
 typedef struct RFrame3 RFrame3;
+typedef struct Triangle2 Triangle2;
 typedef struct Triangle3 Triangle3;
 
 struct Point2 {
@@ -31,6 +32,11 @@ struct RFrame3 {
 	Point3 bx, by, bz;
 };
 
+struct Triangle2
+{
+	Point2 p0, p1, p2;
+};
+
 struct Triangle3 {
 	Point3 p0, p1, p2;
 };