From 1d5bad331c30b465f3218234eb97a72bc155e586 Mon Sep 17 00:00:00 2001
From: Scott Klum <scott.klum@gmail.com>
Date: Thu, 13 Feb 2014 16:32:40 -0500
Subject: [PATCH] DrawDelaunay should not throw a fatal if no triangles exist

---
 openbr/plugins/landmarks.cpp | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/openbr/plugins/landmarks.cpp b/openbr/plugins/landmarks.cpp
index 1cb4445..c3b924b 100644
--- a/openbr/plugins/landmarks.cpp
+++ b/openbr/plugins/landmarks.cpp
@@ -290,16 +290,18 @@ class DrawDelaunayTransform : public UntrainableTransform
 
     void project(const Template &src, Template &dst) const
     {
-        QList<Point2f> validTriangles = OpenCVUtils::toPoints(src.file.getList<QPointF>("DelaunayTriangles"));
+        dst = src;
 
-        // Clone the matrix do draw on it
-        dst.m() = src.m().clone();
+        if (src.file.contains("DelaunayTriangles")) {
+            QList<Point2f> validTriangles = OpenCVUtils::toPoints(src.file.getList<QPointF>("DelaunayTriangles"));
 
-        for (int i = 0; i < validTriangles.size(); i+=3) {
-            line(dst.m(), validTriangles[i], validTriangles[i+1], Scalar(0,0,0), 1);
-            line(dst.m(), validTriangles[i+1], validTriangles[i+2], Scalar(0,0,0), 1);
-            line(dst.m(), validTriangles[i+2], validTriangles[i], Scalar(0,0,0), 1);
-        }
+            // Clone the matrix do draw on it
+            for (int i = 0; i < validTriangles.size(); i+=3) {
+                line(dst, validTriangles[i], validTriangles[i+1], Scalar(0,0,0), 1);
+                line(dst, validTriangles[i+1], validTriangles[i+2], Scalar(0,0,0), 1);
+                line(dst, validTriangles[i+2], validTriangles[i], Scalar(0,0,0), 1);
+            }
+        } else qWarning("Template does not contain Delaunay triangulation.");
     }
 };
 
--
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